Journal articles on the topic 'Heatwave response plans'

Heat exposure is a well-known health hazard, which causes several problems ranging from thermal discomfort or productivity reduction to the aggravation of existing illnesses and death. Climate projections foresee an increase in the frequency and intensity of heat-related impacts on human health. To reduce these climate risks, governments need a better understanding of not only the scale and the factors affecting those risks, but also how to prepare and protect the city and citizens against these risks and prevent them through effective policy making. Therefore, climate adaptation decisions need to be made in complex systems with manifold uncertainties. In response to these deep uncertainties, different planning approaches have been developed to assist policymakers in decision making. This paper is focused on one of the dynamic adaptive policy planning approaches: the adaptation pathway. This approach allows designing alternative feasible plans that are flexible and can respond when new information appears or when conditions in the environment change. This paper presents a structured methodology for designing adaptation pathways. The work describes a high-level adaptation pathway covering heatwave impacts on productivity and health at city level in Antwerp to ensure the city adapts to future conditions. Lastly, a summary is provided of the lessons learned and the challenges of this approach are discussed.

BackgroundSouth Australia is often referred to as the driest state in the driest continent on earth and the community expects summers to be hot. However since 2007 South Australia has experienced several periods of extreme heat which have challenged and required the emergency services including health to consider a new preparedness approach. Any extreme weather condition can cause disruption to the community and the effects of such events as extreme heat are not always immediately obvious. However these effects can silently cause death and an increase to the health burden of the community.DiscussionIn South Australia the term ‘Extreme Heat’ as opposed to ‘Heatwave’ has been quite deliberately chosen as this describes more accurately an unusual climatic situation characterised by higher temperatures and greater length of time than normally expected. A number of studies have been undertaken to consider the impact on the health of the South Australian community and its health services and specfic action plans and communication strategies have been developed to respond to extreme heat and encourage an increasing level of community resilience. This paper will describe recent events, some of the research undertaken and the preparedness, planning and response strategies implemented to reduce and manage the risk.ConclusionThe response strategies introduced in South Australia have been recognised for their excellence and in 2010 SA Health was the recipient of several awards at both state and national level for this work.

Abstract. In the last decade, Europe has been stricken by two outstanding heatwaves, the 2003 event in western Europe and the 2010 episode over Russia. Both events were characterized by record-breaking temperatures and widespread socio-economic impacts, including significant increments on human mortality, decreases in crop yields and in hydroelectric production. Previous works have shown that an extreme climatic event does not always imply an extreme response by ecosystems. This work attempts to assess how extreme was the vegetation response to the heatwaves during 2003 and 2010 in Europe, in order to quantify the impacts of the two events on carbon fluxes in plant productivity and to identify the physical drivers of the observed response. Heatwave impacts in vegetation productivity were analysed using MODIS products from 2000 to 2011. Both 2003 and 2010 events led to marked decreases in plant productivity, well below the climatological range of variability, with carbon uptake by vegetation during August reaching negative anomalies of more than 2 standard deviations, although the 2010 event affected a much larger extent. A differentiated response in autotrophic respiration was observed, depending on land-cover types, with forests increasing respiration rates in response to the heatwaves, while in crops respiration rates decreased. The widespread decrease in carbon uptake matched the regions where very high temperature values were also preceded by a long period of below-average precipitation, leading to strong soil moisture deficits. In the case of the 2003 heatwave, results indicate that moisture deficits coupled with high temperatures drove the extreme response of vegetation, while for the 2010 event very high temperatures appear to be the sole driver of very low productivity.

Climate change has caused uncertainty in the hydrological pattern including weather change, precipitation fluctuations, and extreme temperature, thus triggering unforeseen natural tragedies such as hurricanes, flash flooding, heatwave and more. Because of these unanticipated events occurring all around the globe, the study of the influence of climate change on the alteration of flooding patterns has gained a lot of attention. This research study intends to provide an insight into how the future projected streamflow will affect the flooding-inundation extent by comparing the change in floodplain using both historical and future simulated scenarios. For the future projected data, the climate model Atmosphere/Ocean General Circulation Model (AOGCM) developed by Coupled Model Intercomparison Project Phase 6 (CMIP6) is used, which illustrates that the flood is increasing in considering climate models. Furthermore, a comparison of the existing flood inundation map by the Federal Emergency Management Agency (FEMA) study with the map generated by future projected streamflow data presents the entire inundation area in flood maps, implying the expansion area compared to FEMA needs to be considered in making emergency response plans. The effect of flooding in the inundation area from historical to future flow values, presented mathematically by a calculation of inundation extent percentage, infers that the considered watershed of Rock River is a flood-prone area. The goal is to provide insights on the importance of using the forecasted data for flood analysis and to offer the necessary background needed to strategize an emergency response plan for flood management.

Grapevine cultivation, such as the whole horticulture, is currently challenged by several factors, among which the extreme weather events occurring under the climate change scenario are the most relevant. Within this context, the present study aims at characterizing at the berry level the physiological response of Vitis vinifera cv. Sauvignon Blanc to sequential stresses simulated under a semi-controlled environment: flooding at bud-break followed by multiple summer stress (drought plus heatwave) occurring at pre-vèraison. Transcriptomic and metabolomic assessments were performed through RNASeq and NMR, respectively. A comprehensive hormone profiling was also carried out. Results pointed out a different response to the heatwave in the two situations. Flooding caused a developmental advance, determining a different physiological background in the berry, thus affecting its response to the summer stress at both transcriptional levels, with the upregulation of genes involved in oxidative stress responses, and metabolic level, with the increase in osmoprotectants, such as proline and other amino acids. In conclusion, sequential stress, including a flooding event at bud-break followed by a summer heatwave, may impact phenological development and berry ripening, with possible consequences on berry and wine quality. A berry physiological model is presented that may support the development of sustainable vineyard management solutions to improve the water use efficiency and adaptation capacity of actual viticultural systems to future scenarios.

It is vital to ramp up crop production dramatically by 2050 due to the increasing global population and demand for food. However, with the climate change projections showing that droughts and heatwaves becoming common in much of the globe, there is a severe threat of a sharp decline in crop yields. Thus, developing crop varieties with inbuilt genetic tolerance to environmental stresses is urgently needed. Selective breeding based on genetic diversity is not keeping up with the growing demand for food and feed. However, the emergence of contemporary plant genetic engineering, genome-editing, and synthetic biology offer precise tools for developing crops that can sustain productivity under stress conditions. Here, we summarize the systems biology-level understanding of regulatory pathways involved in perception, signalling, and protective processes activated in response to unfavourable environmental conditions. The potential role of noncoding RNAs in the regulation of abiotic stress responses has also been highlighted. Further, examples of imparting abiotic stress tolerance by genetic engineering are discussed. Additionally, we provide perspectives on the rational design of abiotic stress tolerance through synthetic biology and list various bioparts that can be used to design synthetic gene circuits whose stress-protective functions can be switched on/off in response to environmental cues.

Using five eddy covariance flux sites (two forests and three grasslands), we investigated ecosystem physiological responses to the 2018 drought across elevational gradients in Switzerland. Flux measurements showed that at lower elevation sites (below 1000 m.a.s.l.; grassland and mixed forest) annual ecosystem productivity (GPP) declined by approximately 20% compared to the previous 2 years (2016 and 2017), which led to a reduced annual net ecosystem productivity (NEP). At the high elevation sites, however, GPP increased by approximately 14% and as a result NEP increased in the alpine and montane grasslands, but not in the subalpine coniferous forest. There, increased ecosystem respiration led to a reduced annual NEP, despite increased GPP and lengthening of the growing period. Among all ecosystems, the coniferous forest showed the most pronounced negative stomatal response to atmospheric dryness (i.e. vapour pressure deficit, VPD) that resulted in a decline in surface conductance and an increased water-use efficiency during drought. While increased temperature enhanced the water-use efficiency of both forests, de-coupling of GPP from evapotranspiration at the low-elevation grassland site negatively affected water-use efficiency due to non-stomatal reductions in photosynthesis. Our results show that hot droughts (such as in 2018) lead to different responses across plants types, and thus ecosystems. Particularly grasslands at lower elevations are the most vulnerable ecosystems to negative impacts of future drought in Switzerland. This article is part of the theme issue ‘Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale’.

Terrestrial gross primary productivity (GPP) varies greatly over time and space. A better understanding of this variability is necessary for more accurate predictions of the future climate–carbon cycle feedback. Recent studies have suggested that variability in GPP is driven by a broad range of biotic and abiotic factors operating mainly through changes in vegetation phenology and physiological processes. However, it is still unclear how plant phenology and physiology can be integrated to explain the spatiotemporal variability of terrestrial GPP. Based on analyses of eddy–covariance and satellite-derived data, we decomposed annual terrestrial GPP into the length of the CO2 uptake period (CUP) and the seasonal maximal capacity of CO2 uptake (GPPmax). The product of CUP and GPPmax explained >90% of the temporal GPP variability in most areas of North America during 2000–2010 and the spatial GPP variation among globally distributed eddy flux tower sites. It also explained GPP response to the European heatwave in 2003 (r2 = 0.90) and GPP recovery after a fire disturbance in South Dakota (r2 = 0.88). Additional analysis of the eddy–covariance flux data shows that the interbiome variation in annual GPP is better explained by that in GPPmax than CUP. These findings indicate that terrestrial GPP is jointly controlled by ecosystem-level plant phenology and photosynthetic capacity, and greater understanding of GPPmax and CUP responses to environmental and biological variations will, thus, improve predictions of GPP over time and space.

Abstract As global land surface temperature continues to rise and heatwave events increase in frequency, duration, and/or intensity, our key food and fuel cropping systems will likely face increased heat-related stress. A large volume of literature exists on exploring measured and modelled impacts of rising temperature on crop photosynthesis, from enzymatic responses within the leaf up to larger ecosystem-scale responses that reflect seasonal and interannual crop responses to heat. This review discusses (i) how crop photosynthesis changes with temperature at the enzymatic scale within the leaf; (ii) how stomata and plant transport systems are affected by temperature; (iii) what features make a plant susceptible or tolerant to elevated temperature and heat stress; and (iv) how these temperature and heat effects compound at the ecosystem scale to affect crop yields. Throughout the review, we identify current advancements and future research trajectories that are needed to make our cropping systems more resilient to rising temperature and heat stress, which are both projected to occur due to current global fossil fuel emissions.

Growers in the cultivated areas where the climate change threatens the agricultural productivity and livelihoods are aware that the current constraints for good quality water are being worsened by heatwaves. We studied the combination of salinity (60 mM NaCl) and heat shock stress (43 °C) in pepper plants (Capsicum annuum L. var. Tamarin) since this can affect physiological and biochemical processes distinctly when compared to separate effects. Moreover, the exogenous application of 0.5 mM salicylic acid (SA) was studied to determine its impacts and the SA-mediated processes that confer tolerance of the combined or stand-alone stresses. Plant growth, leaf Cl− and NO3− concentrations, carbohydrates, and polyamines were analyzed. Our results show that both salinity stress (SS) and heat stress (HS) reduced plant fresh weight, and SA only increased it for HS, with no effect for the combined stress (CS). While SA increased the concentration of Cl− for SS or CS, it had no effect on NO3−. The carbohydrates concentrations were, in general, increased by HS, and were decreased by CS, and for glucose and fructose, by SA. Additionally, when CS was imposed, SA significantly increased the spermine and spermidine concentrations. Thus, SA did not always alleviate the CS and the plant response to CS cannot be directly attributed to the full or partial sum of the individual responses to each stress.

Abstract. Future climate change has the potential to increase drought in many regions of the globe, making it essential that land surface models (LSMs) used in coupled climate models, realistically capture the drought responses of vegetation. Recent data syntheses show that drought sensitivity varies considerably among plants from different climate zones, but state-of-the-art LSMs currently assume the same drought sensitivity for all vegetation. We tested whether variable drought sensitivities are needed to explain the observed large-scale patterns of drought impact. We implemented data-driven drought sensitivities in the Community Atmosphere Biosphere Land Exchange (CABLE) LSM and evaluated alternative sensitivities across a latitudinal gradient in Europe during the 2003 heatwave. The model predicted an overly abrupt onset of drought unless average soil water potential was calculated with dynamic weighting across soil layers. We found that high drought sensitivity at the northernmost sites, and low drought sensitivity at the southernmost sites, was necessary to accurately model responses during drought. Our results indicate that LSMs will over-estimate drought impacts in drier climates unless different sensitivity of vegetation to drought is taken into account.

Abstract. Future climate change has the potential to increase drought in many regions of the globe, making it essential that land surface models (LSMs) used in coupled climate models realistically capture the drought responses of vegetation. Recent data syntheses show that drought sensitivity varies considerably among plants from different climate zones, but state-of-the-art LSMs currently assume the same drought sensitivity for all vegetation. We tested whether variable drought sensitivities are needed to explain the observed large-scale patterns of drought impact on the carbon, water and energy fluxes. We implemented data-driven drought sensitivities in the Community Atmosphere Biosphere Land Exchange (CABLE) LSM and evaluated alternative sensitivities across a latitudinal gradient in Europe during the 2003 heatwave. The model predicted an overly abrupt onset of drought unless average soil water potential was calculated with dynamic weighting across soil layers. We found that high drought sensitivity at the most mesic sites, and low drought sensitivity at the most xeric sites, was necessary to accurately model responses during drought. Our results indicate that LSMs will over-estimate drought impacts in drier climates unless different sensitivity of vegetation to drought is taken into account.

Abstract Warming nights are correlated with declining wheat growth and yield. As a key determinant of plant biomass, respiration consumes O2 as it produces ATP and releases CO2 and is typically reduced under warming to maintain metabolic efficiency. We compared the response of respiratory O2 and CO2 flux to multiple night and day warming treatments in wheat leaves and roots, using one commercial (Mace) and one breeding cultivar grown in controlled environments. We also examined the effect of night warming and a day heatwave on the capacity of the ATP-uncoupled alternative oxidase (AOX) pathway. Under warm nights, plant biomass fell, respiratory CO2 release measured at a common temperature was unchanged (indicating higher rates of CO2 release at prevailing growth temperature), respiratory O2 consumption at a common temperature declined, and AOX pathway capacity increased. The uncoupling of CO2 and O2 exchange and enhanced AOX pathway capacity suggest a reduction in plant energy demand under warm nights (lower O2 consumption), alongside higher rates of CO2 release under prevailing growth temperature (due to a lack of down-regulation of respiratory CO2 release). Less efficient ATP synthesis, teamed with sustained CO2 flux, could thus be driving observed biomass declines under warm nights.

BACKGROUND: Kaolin particle-film application is a well-known strategy to avoid fruit damage. However, its putative role in balancing berry ripening under a changing climate remains poorly explored. OBJECTIVE: We assessed kaolin treatment effect on several ripening berry components, hormonal balance and oenological parameters of the field-grown Touriga-Franca (TF) and Touriga–Nacional (TN) grapevine varieties at veraison (EL35) and ripening (EL38) during two growing seasons (2017 and 2018). RESULTS: Under the adverse summer conditions (two heatwave events) of 2017, kaolin application increased 211.2 %and 51.4 %the salicylic acid (SA) and abscisic acid (ABA) levels in TF berries at EL38, while no significant differences were observed in TN. Conversely, TF, and TN kaolin treated berries showed lower SA and ABA accumulation in 2018, respectively. Tartaric acid content increased about 17.2 %, and 24.2 %in TF and TN treated berries at stage EL35 in the 2017 growing season. Though kaolin treatment had no consistent effect on anthocyanins accumulation, flavonoids, ortho-diphenols and tannins increased in kaolin treated grapevines in 2017. CONCLUSIONS: This study highlights the key role of climate in triggering ripening related processes and fruit quality potential. Nevertheless, kaolin treated grapevines displayed an improved response to oxidative stress signals by increasing secondary metabolites accumulation in warm vintages. Kaolin application promoted different varietal responses, with a possible ripening delaying effect in TF, reinforcing its efficiency in alleviating severe summer stress impacts.

Abstract The increasing occurrence of heatwaves has intensified temperature stress on terrestrial vegetation. Here, we investigate how two contrasting isoprene-emitting tropical species, Ficus benjamina and Pachira aquatica, cope with heat stress and assess the role of internal plant carbon sources for isoprene biosynthesis in relation to thermotolerance. To our knowledge, this is the first study to report isoprene emissions from P. aquatica. We exposed plants to two levels of heat stress and determined the temperature response curves for isoprene and photosynthesis. To assess the use of internal C sources in isoprene biosynthesis, plants were fed with 13C position-labelled pyruvate. F. benjamina was more heat tolerant with higher constitutive isoprene emissions and stronger acclimation to higher temperatures than P. aquatica, which showed higher induced isoprene emissions at elevated temperatures. Under heat stress, both isoprene emissions and the proportion of cytosolic pyruvate allocated into isoprene synthesis increased. This represents a mechanism that P. aquatica, and to a lesser extent F. benjamina, has adopted as an immediate response to sudden increase in heat stress. However, in the long run under prolonged heat, the species with constitutive emissions (F. benjamina) was better adapted, indicating that plants that invest more carbon into protective emissions of biogenic volatile organic compounds tend to suffer less from heat stress.

In a changing climate, extreme weather events such as heatwaves will be more frequent and could affect grain weight and the quality of crops such as wheat, one of the most significant crops in terms of global food security. In this work, we characterized the response of Triticum turgidum L. spp. durum wheat to short-term heat stress (HS) treatment at transcriptomic and physiological levels during early grain filling in glasshouse experiments. We found a significant reduction in grain weight (23.9%) and grain dimensions from HS treatment. Grain quality was also affected, showing a decrease in starch content (20.8%), in addition to increments in grain protein levels (14.6%), with respect to the control condition. Moreover, RNA-seq analysis of durum wheat grains allowed us to identify 1590 differentially expressed genes related to photosynthesis, response to heat, and carbohydrate metabolic process. A gene regulatory network analysis of HS-responsive genes uncovered novel transcription factors (TFs) controlling the expression of genes involved in abiotic stress response and grain quality, such as a member of the DOF family predicted to regulate glycogen and starch biosynthetic processes in response to HS in grains. In summary, our results provide new insights into the extensive transcriptome reprogramming that occurs during short-term HS in durum wheat grains.

To protect public health, heat-related policies are increasingly being adopted by city authorities to address the unequal impact of heatwaves. Ahmedabad’s Heat Action Plan (HAP) is an acclaimed and successful policy response in India and beyond. While the pilot evaluation of the initiative suggests that almost a thousand deaths were avoided annually after its implementation, it is not yet clear whose lives were saved, and to what extent this statistic was due to the HAP, rather than other factors. By reviewing the published and grey literature centering on the HAP target groups, outreach strategies, and impacts on urban services, this paper points out major knowledge gaps concerning the potentials and impacts of the HAP, which may lead to the systematical exclusion of vulnerable and disadvantaged groups from the intended benefits. In this paper, it is argued that the effectiveness and inclusiveness of the HAP predominantly depend on its integration into urban development projects, which is a challenging task given the existing horizontal and vertical fragmentation in the planning of city projects. Moreover, urban plans and policies, including the HAP, are shown to be overly focused on technology, and as a consequence, they do not realize their limited scope in addressing the associated issues, which are fundamentally social, deep, and structural, such as spatial inequality in Indian cities.

Disasters caused by the climate crisis continue around the world. Record-breaking heatwaves and floods continue in Korea, and the scale of damage is gradually increasing. In order to respond to the climate crisis, the world is striving to achieve carbon neutrality, and Korea is one of the target countries. Because carbon neutrality is not just a recommendation, but an obligation to be legalized and followed by domestic law, countries around the world are enacting carbon neutrality laws to respond to the climate crisis. The UK is a country that has legislated greenhouse gas reduction targets to respond to the climate crisis early. In the United Kingdom, the people, private companies, organizations, and the country have come together to deal with disasters caused by the climate crisis and to respond to it, and have proceeded with various policies and legislation to respond to the climate crisis. Afterwards, the Climate Change Committee was established based on the 「Climate Change Act」 to promote policies to respond to the climate crisis. The Climate Change Commission maintains political neutrality and consistently promotes climate policies, gaining a lot of trust from the government and the public as an institution specializing in responding to the climate crisis. Korea also introduced various climate crisis response policies from the UK, one of which is the UK Climate Change Commission. Korea has established the ‘2050 Carbon Neutral Green Growth Committee’ modeled on the UK’s Climate Change Committee to play a role as a central organization in Korea’s climate crisis response policy. However, unlike the United Kingdom, where the Climate Change Committee was established early, there are some points for improvement in Korea because the system for achieving the goal of carbon neutrality was introduced not long ago. Therefore, we would like to analyze the UK's Climate Change Committee and discuss the improvement plans of Korea's 2050 Carbon Neutral Green Growth Committee, which will play a central role in responding to the climate crisis in the future.

Disasters caused by the climate crisis continue around the world. Record-breaking heatwaves and floods continue in Korea, and the scale of damage is gradually increasing. In order to respond to the climate crisis, the world is striving to achieve carbon neutrality, and Korea is one of the target countries. Because carbon neutrality is not just a recommendation, but an obligation to be legalized and followed by domestic law, countries around the world are enacting carbon neutrality laws to respond to the climate crisis. The UK is a country that has legislated greenhouse gas reduction targets to respond to the climate crisis early. In the United Kingdom, the people, private companies, organizations, and the country have come together to deal with disasters caused by the climate crisis and to respond to it, and have proceeded with various policies and legislation to respond to the climate crisis. Afterwards, the Climate Change Committee was established based on the 「Climate Change Act」 to promote policies to respond to the climate crisis. The Climate Change Commission maintains political neutrality and consistently promotes climate policies, gaining a lot of trust from the government and the public as an institution specializing in responding to the climate crisis. Korea also introduced various climate crisis response policies from the UK, one of which is the UK Climate Change Commission. Korea has established the ‘2050 Carbon Neutral Green Growth Committee’ modeled on the UK’s Climate Change Committee to play a role as a central organization in Korea’s climate crisis response policy. However, unlike the United Kingdom, where the Climate Change Committee was established early, there are some points for improvement in Korea because the system for achieving the goal of carbon neutrality was introduced not long ago. Therefore, we would like to analyze the UK's Climate Change Committee and discuss the improvement plans of Korea's 2050 Carbon Neutral Green Growth Committee, which will play a central role in responding to the climate crisis in the future.

Global warming is predicted to be increased in the upcoming years, resulting in frequent heatwaves or hot days worldwide, which can seriously affect crop growth and productivity. The responses of heat stress to several photophysiological and biochemical traits in three tomato cultivars were investigated in a pot experiment, and the heat tolerance capability of these cultivars was evaluated based on the investigated traits. The experiment was followed by a factorial completely randomized design, and the factors were (i) tomato cultivars (BARI Hybrid Tomato-5, BARI Tomato-14, and BARI Tomato-15) and (ii) heat stress (control and heat). The plants of three tomato cultivars were exposed to short-term heat stress (four days at 38/25 °C day/night temperature) at the flowering stage. The measured traits such as dry mass, leaf greenness (SPAD), maximum photochemical efficiency of photosystem II (Fv/Fm), photosynthetic rate (A), stomatal conductance (gs), transpiration rate (E), leaf chlorophyll, and carotenoid content were significantly declined, while the catalase and ascorbate peroxidase activities were increased by heat stress in all three tomato cultivars except BARI Tomato-15, which showed unaltered gs, E, and carotenoids. The percent reduction (over control) in SPAD, Fv/Fm, A, total chlorophyll, and total carotenoids was significantly lower (11, 06, 25, 34, and 19%, respectively), whereas the percent increase in catalase and ascorbate peroxidase activities was substantially higher (70 and 72%, respectively) in BARI Tomato-15 than in other cultivars. Based on the measured physiological and biochemical traits, the cultivar BARI Tomato-15 showed better heat tolerance than the other cultivars.

Crop reproductive success is significantly challenged by heatwaves, which are increasing in frequency and severity globally. Heat-induced male sterility is mainly due to aborted pollen development, but it is not clear whether this is through direct or systemic effects. Here, long-term mild heat (LTMH) treatment, mimicking a heatwave, was applied locally to tomato flowers or whole plants and followed up by cytological, transcriptomic, and biochemical analyses. By analyzing pollen viability, LTMH was shown to act directly on the flowers and not via effects on other plant tissue. The meiosis to early microspore stage of pollen development was the most sensitive to LTMH and 3 days of exposure around this period was sufficient to significantly reduce pollen viability at the flower anthesis stage. Extensive cytological analysis showed that abnormalities in pollen development could first be observed after pollen mitosis I, while no deviations in tapetum development were observed. Transcriptomic and biochemical analyses suggested that pollen development suffered from tapetal ER stress and that there was a limited role for oxidative stress. Our results provide the first evidence that heat acts directly on flowers to induce pollen sterility, and that the molecular-physiological responses of developing anthers to the LTMH are different from those to severe heat shock.

Wheat is a dietary staple consumed worldwide strongly responsible for proteins and carbohydrate population intake. However, wheat production and quality will scarcely fulfill forward demands, which are compounded by high-temperature (HT) events as heatwaves, increasingly common in Portugal. Thus, landraces assume crucial importance as potential reservoirs of useful traits for wheat breeding and may be pre-adapted to extreme environmental conditions. This work evaluates four Portuguese landrace yield and grain composition through attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, particularly protein content, and their responses to HT treatment mimicking a heatwave. Landraces showed distinct yield traits, especially plant height and first spike grain number, and a similar pattern in FTIR spectra, although revealing differences in grain components’ proportions. Comparison between spectra band intensity indicates that Ardito has the highest protein-related peaks, contrary to Magueija, which appears to be the landrace with higher lipid content. In plants submitted to 1 week of HT treatment 10 days after anthesis, the first spike grain size and weight were markedly reduced in all landraces. Additionally, it was observed that a general increase in grain protein content in the four landraces, being the increment observed in Ardito and Grécia, is statistically significant. The comparative assessment of control and HT average FTIR spectra denoted also the occurrence of alterations in grain polysaccharide composition. An integrated assessment of the evaluations performed revealed that Ardito and Magueija landraces presented diverse yield-related characteristics and distinct responses to cope with HT. In fact, the former landrace revealed considerable grain yield diminution along with an increase in grain protein proportion after HT, while the latter showed a significant increase in spikes and grain number, with grain quality detriment. These results reinforce the relevance of scrutinizing old genotype diversity seeking for useful characteristics, particularly considering HT impact on grain production and quality.

Abstract Marine heatwaves are occurring more frequently as climate change intensifies, resulting in global mass coral bleaching events several times per decade. Despite the time between marine heatwaves decreasing, there is evidence that reef-building corals can develop increased bleaching resistance across repetitive marine heatwaves. This phenomenon of acclimatization via environmental memory may be an important strategy to ensure coral persistence; however, we still understand very little about the apparent acclimatization or, conversely, sensitization (i.e. stress accumulation or weakening) of reef-building corals to consecutive heatwaves and its implications for the trajectory and resilience of coral reefs. Here, we highlight that not only will some corals become stress hardened via marine heatwaves, but many other individuals will suffer sensitization during repeat heatwaves that further exacerbates their stress response during repeat events and depresses fitness. Under current and predicted climate change, it is necessary to gain a better understanding of the acclimatization vs. sensitization trajectories of different species and individuals on the reef, as well as identify whether changes in bleaching susceptibility relates to physiological acclimatization, trade-offs with other biological processes, and ultimately coral persistence in the Anthropocene.

High temperature (HT) events have negative impact on wheat grains yield and quality. Transcriptome profiles of wheat developing grains of commercial genotypes (Antequera and Bancal) and landraces (Ardito and Magueija) submitted to heatwave-like treatments during grain filling were evaluated. Landraces showed significantly more differentially expressed genes (DEGs) and presented more similar responses than commercial genotypes. DEGs were more associated with transcription and RNA and protein synthesis in Antequera and with metabolism alterations in Bancal and landraces. Landraces upregulated genes encoding proteins already described as HT responsive, like heat shock proteins and cupins. Apart from the genes encoding HSP, two other genes were upregulated in all genotypes, one encoding for Adenylate kinase, essential for the cellular homeostasis, and the other for ferritin, recently related with increased tolerance to several abiotic stress in Arabidopsis. Moreover, a NAC transcription factor involved in plant development, known to be a negative regulator of starch synthesis and grain yield, was found to be upregulated in both commercial varieties and downregulated in Magueija landrace. The detected diversity of molecular processes involved in heat response of commercial and traditional genotypes contribute to understand the importance of genetic diversity and relevant pathways to cope with these extreme events.

Introduction The scientific validity of climate change claims, how to intervene (if at all) in environmental, economic, political and social consequences of climate change, and the adaptation and mitigation needed with any given climate change scenario, are contested areas of public, policy and academic discourses. For marginalised populations, the climate discourses around adaptation, mitigation, vulnerability and resilience are of particular importance. This paper considers the silence around disabled people in these discourses. Marci Roth of the Spinal Cord Injury Association testified before Congress in regards to the Katrina disaster: [On August 29] Susan Daniels called me to enlist my help because her sister in-law, a quadriplegic woman in New Orleans, had been unsuccessfully trying to evacuate to the Superdome for two days. […] It was clear that this woman, Benilda Caixetta, was not being evacuated. I stayed on the phone with Benilda, for the most part of the day. […] She kept telling me she’d been calling for a ride to the Superdome since Saturday; but, despite promises, no one came. The very same paratransit system that people can’t rely on in good weather is what was being relied on in the evacuation. […] I was on the phone with Benilda when she told me, with panic in her voice “the water is rushing in.” And then her phone went dead. We learned five days later that she had been found in her apartment dead, floating next to her wheelchair. […] Benilda did not have to drown. (National Council on Disability, emphasis added) According to the Intergovernmental Panel on Climate Change (IPCC), adaptation is the “Adjustment in natural or human systems in response to actual or expected climatic stimuli or their effects, which moderates harm or exploits beneficial opportunities” (IPCC, Climate Change 2007). Adaptations can be anticipatory or reactive, and depending on their degree of spontaneity they can be autonomous or planned (IPCC, Fourth Assessment Report). Adaptations can be private or public (IPCC, Fourth Assessment Report), technological, behavioural, managerial and structural (National Research Council of Canada). Adaptation, in the context of human dimensions of global change, usually refers to a process, action or outcome in a system (household, community, group, sector, region, country) in order for that system to better cope with, manage or adjust to some changing condition, stress, hazard, risk or opportunity (Smit and Wandel). Adaptation can encompass national or regional strategies as well as practical steps taken at the community level or by individuals. According to Smit et al, a framework for systematically defining adaptations is based on three questions: (i) adaptation to what; (ii) who or what adapts; and (iii) how does adaptation occur? These are essential questions that have to be looked at from many angles including cultural and anthropological lenses as well as lenses of marginalised and highly vulnerable populations. Mitigation (to reduce or prevent changes in the climate system), vulnerability (the degree to which a system is susceptible to, and unable to cope with, the adverse effects of climate change), and resilience (the amount of change a system can undergo without changing state), are other important concepts within the climate change discourse. Non-climate stresses can increase vulnerability to climate change by reducing resilience and can also reduce adaptive capacity because of resource deployment to competing needs. Extending this to the context of disabled people, ableism (sentiment to expect certain abilities within humans) (Wolbring, “Is there an end to out-able?”) and disablism (the unwillingness to accommodate different needs) (Miller, Parker and Gillinson) are two concepts that will thus play themselves out in climate discourses. The “Summary for Policymakers” of the IPCC 2007 report, Climate Change 2007: Impacts, Adaptation and Vulnerability, states: “Poor communities can be especially vulnerable, in particular those concentrated in high-risk areas. They tend to have more limited adaptive capacities, and are more dependent on climate-sensitive resources such as local water and food supplies.” From this quote one can conclude that disabled people are particularly impacted, as the majority of disabled people live in poverty (Elwan). For instance, CARE International, a humanitarian organisation fighting global poverty, the UN Office for the Coordination of Humanitarian Affairs, and Maplecroft, a company that specialises in the calculation, analysis and visualisation of global risks, conclude: “The degree of vulnerability is determined by underlying natural, human, social, physical and financial factors and is a major reason why poor people—especially those in marginalised social groups like women, children, the elderly and people with disabilities—are most affected by disasters” (CARE International). The purpose of this paper is to expose the reader to (a) how disabled people are situated in the culture of the climate, adaptation, mitigation and resilience discourse; (b) how one would answer the three questions, (i) adaptation to what, (ii) who or what adapts, and (iii) how does adaptation occur (Smit et al), using a disabled people lens; and (c) what that reality of the involvement of disabled people within the climate change discourse might herald for other groups in the future. The paper contends that there is a pressing need for the climate discourse to be more inclusive and to develop a new social contract to modify existing dynamics of ableism and disablism so as to avoid the uneven distribution of evident burdens already linked to climate change. A Culture of Neglect: The Situation of Disabled People As climates changes, environmental events that are classified as natural disasters are expected to be more frequent. In the face of recent disaster responses, how effective have these efforts been as they relate to the needs and challenges faced by disabled people? Almost immediately after Hurricane Katrina devastated the Gulf Coast, the National Council on Disability (NCD) in the United States estimated that 155,000 people with disabilities lived in the three cities hardest hit by the hurricane (about 25 per cent of the cities’ populations). The NCD urged emergency managers and government officials to recognise that the need for basic necessities by hurricane survivors with disabilities was “compounded by chronic health conditions and functional impairments … [which include] people who are blind, people who are deaf, people who use wheelchairs, canes, walkers, crutches, people with service animals, and people with mental health needs.” The NCD estimated that a disproportionate number of fatalities were people with disabilities. They cited one statistic from the American Association of Retired Persons (AARP): “73 per cent of Hurricane Katrina-related deaths in New Orleans area were among persons age 60 and over, although they comprised only 15 per cent of the population in New Orleans.” As the NCD stated, “most of those individuals had medical conditions and functional or sensory disabilities that made them more vulnerable. Many more people with disabilities under the age of 60 died or were otherwise impacted by the hurricanes.” As these numbers are very likely linked to the impaired status of the elderly, it seems reasonable to assume similar numbers for non-elderly disabled people. Hurricane Katrina is but one example of how disabled people are neglected in a disaster (Hemingway and Priestley; Fjord and Manderson). Disabled people were also disproportionately impacted in other disasters, such as the 1995 Great Hanshin Earthquake in Japan (Nakamura) or the 2003 heatwave in France, where 63 per cent of heat-related deaths occurred in institutions, with a quarter of these in nursing homes (Holstein et al.). A review of 18 US heatwave response plans revealed that although people with mental or chronic illnesses and the homeless constitute a significant proportion of the victims in recent heatwaves, only one plan emphasised outreach to disabled persons, and only two addressed the shelter and water needs of the homeless (Ebi and Meehl; Bernhard and McGeehin). Presence of Disabled People in Climate Discourse Although climate change will disproportionately impact disabled people, despite the less than stellar record of disaster adaptation and mitigation efforts towards disabled people, and despite the fact that other social groups (such as women, children, ‘the poor’, indigenous people, farmers and displaced people) are mentioned in climate-related reports such as the IPCC reports and the Human Development Report 2007/2008, the same reports do not mention disabled people. Even worse, the majority of the material generated by, and physically set up for, discourses on climate, is inaccessible for many disabled people (Australian Human Rights Commission). For instance, the IPCC report, Climate Change 2007: Impacts, Adaptation and Vulnerability, contains Box 8.2: Gender and natural disasters, makes the following points: (a) “men and women are affected differently in all phases of a disaster, from exposure to risk and risk perception; to preparedness behaviour, warning communication and response; physical, psychological, social and economic impacts; emergency response; and ultimately to recovery and reconstruction”; (b) “natural disasters have been shown to result in increased domestic violence against, and post-traumatic stress disorders in, women”; and (c) “women make an important contribution to disaster reduction, often informally through participating in disaster management and acting as agents of social change. Their resilience and their networks are critical in household and community recovery.” The content of Box 8.2 acknowledges the existence of different perspectives and contributions to the climate discourse, and that it is beneficial to explore these differences. It seems reasonable to assume that differences in perspectives, contributions and impact may well also exist between people with and without disabilities, and that it may be likewise beneficial to explore these differences. Disabled people are differently affected in all phases of a disaster, from exposure to risk and risk perception; to preparedness behaviour, warning communication and response; physical, psychological, social and economic impacts; emergency response; and ultimately to recovery and reconstruction. Disabled people could also make an important contribution to disaster reduction, often informally through participating in disaster management and acting as agents of social change. Their resilience and their networks are critical in household and community recovery, important as distributors of relief efforts and in reconstruction design. The Bonn Declaration from the 2007 international conference, Disasters are always Inclusive: Persons with Disabilities in Humanitarian Emergency Situations, highlighted many problems disabled people are facing and gives recommendations for inclusive disaster preparedness planning, for inclusive response in acute emergency situations and immediate rehabilitation measures, and for inclusive post-disaster reconstruction and development measures. Many workshops were initiated by disabled people groups, such as Rehabilitation International. However, the disabled people disaster adaptation and mitigation discourse is not mainstreamed. Advocacy by people with disability for accessible transport and universal or “life-cycle” housing (among other things) shows how they can contribute significantly to more effective social systems and public facilities. These benefit everyone and help to shift public expectations towards accessible and flexible amenities and services—for example, emergency response and evacuation procedures are much easier for all if such facilities are universally accessible. Most suggestions by disabled people for a more integrative, accessible physical environment and societal attitude benefit everyone, and gain special importance with the ever-increasing proportion of elderly people in society. The IPCC Fourth Assessment Report is intended to be a balanced assessment of current knowledge on climate change mitigation. However, none of the 2007 IPCC reports mention disabled people. Does that mean that disabled people are not impacted by, or impact, climate change? Does no knowledge of adaptation, mitigation and adaptation capacity from a disabled people lens exist, or does the knowledge not reach the IPCC, or does the IPCC judge this knowledge as irrelevant? This culture of neglect and unbalanced assessment of knowledge evident in the IPCC reports was recognised before for rise of a ‘global’ climate discourse. For instance, a 2001 Canadian government document asked that research agendas be developed with the involvement of, among others, disabled people (Health Canada). The 2009 Nairobi Declaration on Africa’s response to climate change (paragraph 36) also asks for the involvement of disabled people (African Ministerial Conference on the Environment). However, so far nothing has trickled up to the international bodies, like the IPCC, or leading conferences such as the United Nations Climate Change Conference Copenhagen 2009. Where Will It End? In his essay, “We do not need climate change apartheid in adaptation”, in the Human Development Report 2007/2008, Archbishop Desmond Tutu suggests that we are drifting into a situation of global adaptation apartheid—that adaptation becomes a euphemism for social injustice on a global scale (United Nations Development Programme). He uses the term “adaptation apartheid” to highlight the inequality of support for adaptation capacity between high and low income countries: “Inequality in capacity to adapt to climate change is emerging as a potential driver of wider disparities in wealth, security and opportunities for human development”. I submit that “adaptation apartheid” also exists in regard to disabled people, with the invisibility of disabled people in the climate discourse being just one facet. The unwillingness to accommodate, to help the “other,” is nothing new for disabled people. The ableism that favours species-typical bodily functioning (Wolbring, “Is there an end to out-able?”; Wolbring, “Why NBIC?”) and disablism (Miller, Parker, and Gillinson)—the lack of accommodation enthusiasm for the needs of people with ‘below’ species-typical body abilities and the unwillingness to adapt to the needs of “others”—is a form of “adaptation apartheid,” of accommodation apartheid, of adaptation disablism that has been battled by disabled people for a long time. In a 2009 online survey of 2000 British people, 38 per cent believed that most people in British society see disabled people as a “drain on resources” (Scope). A majority of human geneticist concluded in a survey in 1999 that disabled people will never be given the support they need (Nippert and Wolff). Adaptation disablism is visible in the literature and studies around other disasters. The 1988 British Medical Association discussion document, Selection of casualties for treatment after nuclear attack, stated “casualties whose injuries were likely to lead to a permanent disability would receive lower priority than those expected to fully recover” (Sunday Morning Herald). Famine is seen to lead to increased infanticide, increased competitiveness and decreased collaboration (Participants of the Nuclear Winter: The Anthropology of Human Survival Session). Ableism and disablism notions experienced by disabled people can now be extended to include those challenges expected to arise from the need to adapt to climate change. It is reasonable to expect that ableism will prevail, expecting people to cope with certain forms of climate change, and that disablism will be extended, with the ones less affected being unwilling to accommodate the ones more affected beyond a certain point. This ableism/disablism will not only play itself out between high and low income countries, as Desmond Tutu described, but also within high income countries, as not every need will be accommodated. The disaster experience of disabled people is just one example. And there might be climate change consequences that one can only mitigate through high tech bodily adaptations that will not be available to many of the ones who are so far accommodated in high income countries. Desmond Tutu submits that adaptation apartheid might work for the fortunate ones in the short term, but will be destructive for them in the long term (United Nations Development Programme). Disability studies scholar Erik Leipoldt proposed that the disability perspective of interdependence is a practical guide from the margins for making new choices that may lead to a just and sustainable world—a concept that reduces the distance between each other and our environment (Leipoldt). This perspective rejects ableism and disablism as it plays itself out today, including adaptation apartheid. Planned adaptation involves four basic steps: information development and awareness-raising; planning and design; implementation; and monitoring and evaluation (Smit et al). Disabled people have important knowledge to contribute to these four basic steps that goes far beyond their community. Their understanding and acceptance of, for example, the concept of interdependence, is just one major contribution. Including the concept of interdependence within the set of tools that inform the four basic steps of adaptation and other facets of climate discourse has the potential to lead to a decrease of adaptation apartheid, and to increase the utility of the climate discourse for the global community as a whole. References African Ministerial Conference on the Environment. 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CARE International, 2008. 26 Aug. 2009 ‹ http://www.careclimatechange.org/files/reports/Human_Implications_PolicyBrief.pdf ›, ‹ http://www.careclimatechange.org/files/reports/CARE_Human_Implications.pdf ›. "Disasters Are Always Inclusive: Persons with Disabilities in Humanitarian Emergency Situations." Bonn Declaration from the International Conference: Disasters Are Always Inclusive: Persons with Disabilities in Humanitarian Emergency Situations. 2007. 26 Aug. 2009 ‹ http://www.disabilityfunders.org/webfm_send/6, http://www.disabilityfunders.org/emergency_preparedness ›, ‹ http://bezev.de/bezev/aktuelles/index.htm ›. Ebi, K., and G. Meehl. Heatwaves and Global Climate Change: The Heat Is On: Climate Change and Heatwaves in the Midwest. 2007. 26 Aug. 2009 ‹ www.pewclimate.org/docUploads/Regional-Impacts-Midwest.pdf ›. Elwan, A. Poverty and Disability: A Survey of the Literature. Worldbank, Social Protection Discussion Paper Series (1999): 9932. 26 Aug. 2009 ‹ http://siteresources.worldbank.org/DISABILITY/Resources/Poverty/Poverty_and_Disability_A_Survey_of_the_Literature.pdf ›. Fjord, L., and L. Manderson. “Anthropological Perspectives on Disasters and Disability: An Introduction.” Human Organisation 68.1 (2009): 64-72. Health Canada. First Annual National Health and Climate Change Science and Policy Research Consensus Conference: How Will Climate Change Affect Priorities for Your Health Science and Policy Research? Health Canada, 2001. 26 Aug. 2009 ‹ http://www.hc-sc.gc.ca/ewh-semt/pubs/climat/research-agenda-recherche/population-eng.php ›. Hemingway, L., and M. Priestley. “Natural Hazards, Human Vulnerability and Disabling Societies: A Disaster for Disabled People?” The Review of Disability Studies (2006). 26 Aug. 2009 ‹ http://www.rds.hawaii.edu/counter/count.php?id=13 ›. Holstein, J., et al. “Were Less Disabled Patients the Most Affected by the 2003 Heatwave in Nursing Homes in Paris, France?” Journal of Public Health Advance 27.4 (2005): 359-65. Intergovernmental Panel on Climate Change. Climate Change 2007: Impacts, Adaptation and Vulnerability. 2007. 26 Aug. 2009 ‹ http://www.ipcc.ch/publications_and_data/publications_ipcc_fourth_assessment_report_wg2_report_impacts_adaptation_and_vulnerability.htm ›. Intergovernmental Panel on Climate Change. “Summary for Policymakers.” Eds. O. F. Canziani, J. P. Palutikof, P. J. van der Linden, C. E. Hanson, and M.L.Parry. Cambridge, UK: Cambridge University Press, 2007. 7-22. 26 Aug. 2009 ‹ http://www.ipcc.ch/pdf/assessment-report/ar4/wg2/ar4-wg2-spm.pdf ›. Intergovernmental Panel on Climate Change. IPCC Fourth Assessment Report Working Group III Report: Mitigation of Climate Change Glossary. 2007. 26 Aug. 2009 ‹ http://www.ipcc.ch/ipccreports/ar4-wg3.htm, http://www.ipcc.ch/pdf/assessment-report/ar4/wg3/ar4-wg3-annex1.pdf ›. Leipoldt, E. “Disability Experience: A Contribution from the Margins. Towards a Sustainable Future.” Journal of Futures Studies 10 (2006): 3-15. Miller, P., S. Parker and S. Gillinson. “Disablism: How to Tackle the Last Prejudice.” Demos, 2004. 26 Aug. 2009 ‹ http://www.demos.co.uk/files/disablism.pdf ›. Nakamura, K. “Disability, Destitution, and Disaster: Surviving the 1995 Great Hanshin Earthquake in Japan.” Human Organisation 68.1 (2009): 82-88. National Council on Disability, National Council on Independent Living, National Organization on Disability, and National Spinal Cord Injury Association and the Paralyzed Veterans of America. Emergency Management and People with Disabilities: before, during and after Congressional Briefing, 10 November 2005. 26 Aug. 2009 ‹ http://www.ncd.gov/newsroom/publications/2005/transcript_emergencymgt.htm ›. National Council on Disability. National Council on Disability on Hurricane Katrina Affected Areas. 2005. 26 Aug. 2009 ‹ http://www.ncd.gov/newsroom/publications/2005/katrina2.htm ›. National Research Council of Canada. From Impacts to Adaptation: Canada in a Changing Climate 2007. 26 Aug. 2009 ‹ http://adaptation.nrcan.gc.ca/assess/2007/pdf/full-complet_e.pdf ›. Nippert, I. and G. Wolff. “Ethik und Genetik: Ergebnisse der Umfrage zu Problemaspekten angewandter Humangenetik 1994-1996, 37 Länder.” Medgen 11 (1999): 53-61. Participants of the Nuclear Winter: The Anthropology of Human Survival Session. Proceedings of the 84th American Anthropological Association's Annual Meeting. Washington, D.C., 6 Dec. 1985. 26 Aug. 2009 ‹ http://www.fas.org/sgp/othergov/doe/lanl/lib-www/la-pubs/00173165.pdf ›. Scope. “Most Britons Think Others View Disabled People ‘As Inferior’.” 2009. 26 Aug. 2009 ‹ http://www.scope.org.uk/cgi-bin/np/viewnews.cgi?id=1244379033, http://www.comres.co.uk/resources/7/Social%20Polls/Scope%20PublicPoll%20Results%20May09.pdf ›. Smit, B., et al. “The Science of Adaptation: A Framework for Assessment.” Mitigation and Adaptation Strategies for Global Change 4 (1999): 199-213. Smit, B., and J. Wandel. “Adaptation, Adaptive Capacity and Vulnerability.” Global Environmental Change 16 (2006): 282-92. Sunday Morning Herald. “Who Lives and Dies in Britain after the Bomb.” Sunday Morning Herald 1988. 26 Aug. 2009 ‹ http://news.google.com/newspapers?nid=1301&dat=19880511&id=wFYVAAAAIBAJ&sjid=kOQDAAAAIBAJ&pg=3909,113100 ›. United Nations Development Programme. Human Development Report 2007/2008: Fighting Climate Change – Human Solidarity in a Divided World. 2008. 26 Aug. 2009 ‹ http://hdr.undp.org/en/media/HDR_20072008_EN_Complete.pdf ›. Wolbring, Gregor. “Is There an End to Out-Able? Is There an End to the Rat Race for Abilities?” M/C Journal 11.3 (2008). 26 Aug. 2009 ‹ http://journal.media-culture.org.au/index.php/mcjournal/article/viewArticle/57 ›. Wolbring, Gregor. “Why NBIC? Why Human Performance Enhancement?” Innovation: The European Journal of Social Science Research 21.1 (2008): 25-40.

Abstract Background The expectation that climate change will further exacerbate extreme weather events such as heatwaves is of primary concern to policymakers and scientists. Effective governance is fundamental to preparedness for and response to such threats. This paper explores the governance structures of European heat health action plans and provides insights into key stakeholders, roles, responsibilities and collaboration. Methods This was a two-phase qualitative study, in which we complemented a desk review of 15 European national heat health action plans (NHHAPs) with, after obtaining informed consent, 68 interviews in nine countries with key informants involved in the development, implementation and/or evaluation of these NHHAPs. A thematic analysis was used to analyze the NHHAPs inductively. This analysis focused on three themes: identifying key stakeholders, defining and assigning roles and collaboration among stakeholders. The iteratively created codebook was then applied to the analysis of the key informant interviews. All analyses were done using NVivo 10 qualitative analysis software. Results The majority of the NHHAPs have governance as one of their main objectives, to support the coordination of actions and collaboration among involved stakeholders. There are, however, significant differences between plan and practice. On the basis of the available data, we have little insight into the process of stakeholder identification, but we do find that most countries involve the same types of stakeholders. Roles are mainly defined and assigned in relation to the alert levels of the warning system, causing other role aspects and other roles to be vague and ambiguous. Collaboration is key to many NHHAP elements and is mainly experienced positively, though improvements and new collaborations are considered. Conclusions Our findings show a need for a more deliberate and structured approach to governance in the context of NHHAPs. A cross-sectoral approach to the identification of key stakeholders can facilitate a broader preparedness and response to heatwaves. Roles and responsibilities of stakeholders should be defined and assigned more clearly to avoid confusion and to improve effective implementation. To this extent, we identify and describe seven key roles and potential stakeholders to which these roles are usually assigned. Finally, also collaboration among stakeholders can benefit from a cross-sectoral approach, but also formal structures can be beneficial.

The effects of the climate change including an increase in the average global temperatures, and abnormal weather events such as frequent and severe heatwaves are emerging as a worldwide ecological concern due to their impacts on plant vegetation and crop productivity. In this review, the molecular processes of plants in response to heat stress—from the sensing of heat stress, the subsequent molecular cascades associated with the activation of heat shock factors and their primary targets (heat shock proteins), to the cellular responses—have been summarized with an emphasis on the classification and functions of heat shock proteins. Vegetables contain many essential vitamins, minerals, antioxidants, and fibers that provide many critical health benefits to humans. The adverse effects of heat stress on vegetable growth can be alleviated by developing vegetable crops with enhanced thermotolerance with the aid of various genetic tools. To achieve this goal, a solid understanding of the molecular and/or cellular mechanisms underlying various responses of vegetables to high temperature is imperative. Therefore, efforts to identify heat stress-responsive genes including those that code for heat shock factors and heat shock proteins, their functional roles in vegetable crops, and also their application to developing vegetables tolerant to heat stress are discussed.

Abstract The climate crisis is one of the most significant threats to marine ecosystems. It is leading to severe increases in sea surface temperatures and in the frequency and magnitude of marine heatwaves. These changing conditions are directly impacting coral reef ecosystems, which are among the most biodiverse ecosystems on Earth. Coral-associated symbionts are particularly affected because summer heatwaves cause coral bleaching—the loss of endosymbiotic microalgae (Symbiodiniaceae) from coral tissues, leading to coral starvation and death. Coral-associated Symbiodiniaceae and bacteria have been extensively studied in the context of climate change, especially in terms of community diversity and dynamics. However, data on other microorganisms and their response to climate change are scarce. Here, we review current knowledge on how increasing temperatures affect understudied coral-associated microorganisms such as archaea, fungi, viruses, and protists other than Symbiodiniaceae, as well as microbe-microbe interactions. We show that the coral-microbe symbiosis equilibrium is at risk under current and predicted future climate change and argue that coral reef conservation initiatives should include microbe-focused approaches.

Abstract Forests are increasingly affected by heatwaves, often co-occurring with drought, with consequences for water and carbon (C) cycling. However, our ability to project tree resilience to more intense hot droughts remains limited. Here, we used single tree chambers (n = 18) to investigate transpiration (E), net assimilation (Anet), root respiration (Rroot) and stem diameter change in Scots pine seedlings in a control treatment and during gradually intensifying heat or drought-heat stress (max. 42 °C), including recovery. Alongside this, we assessed indicators of stress impacts and recovery capacities. In the heat treatment, excessive leaf heating was mitigated via increased E, while under drought-heat, E ceased and leaf temperatures reached 46 °C. However, leaf electrolyte leakage was negligible, while light-adapted quantum yield of photosystem II (F′v/F′m) declined alongside Anet moderately in heat, but strongly in drought-heat seedlings, in which respiration exceeded C uptake. Drought-heat largely affected the hydraulic system as apparent in stem diameter shrinkage, declining relative needle water content (RWCNeedle) and water potential (ΨNeedle) reaching −2.7 MPa, alongside a 90% decline of leaf hydraulic conductance (KLeaf). Heat alone resulted in low functional impairment and all measured parameters recovered quickly. Contrary, following drought-heat, the recovery of KLeaf was incomplete and stem hydraulic conductivity (KS) was 25% lower than the control. However, F′v/F′m recovered and the tree net C balance reached control values 2 days post-stress, with stem increment rates accelerating during the second recovery week. This indicates a new equilibrium of C uptake and release in drought-heat seedlings independent of hydraulic impairment, which may slowly contribute to the repair of damaged tissues. In summary, Scots pine recovered rapidly following moderate heat stress, while combined with drought, hydraulic and thermal stress intensified, resulting in functional damage and slow recovery of hydraulic conductance. This incomplete hydraulic recovery could critically limit evaporative cooling capacities and C uptake under repeated heatwaves.

The global climate change is leading to increased frequency of heatwaves with crops getting exposed to extreme temperature events. Such temperature spikes during the reproductive stage of plant development can harm crop fertility and productivity. Here we report the response of short-term heat stress events on the pollen and pistil tissues in a commercially grown cultivar of Brassica napus. Our data reveals that short-term temperature spikes not only affect pollen fitness but also impair the ability of the pistil to support pollen germination and pollen tube growth and that the heat stress sensitivity of pistil can have severe consequences for seed set and yield. Comparative transcriptome profiling of non-stressed and heat-stressed (40°C for 30 min) pollen and pistil (stigma + style) highlighted the underlying cellular mechanisms involved in heat stress response in these reproductive tissues. In pollen, cell wall organization and cellular transport-related genes possibly regulate pollen fitness under heat stress while the heat stress-induced repression of transcription factor encoding transcripts is a feature of the pistil response. Overall, high temperature altered the expression of genes involved in protein processing, regulation of transcription, pollen-pistil interactions, and misregulation of cellular organization, transport, and metabolism. Our results show that short episodes of high-temperature exposure in B. napus modulate key regulatory pathways disrupted reproductive processes, ultimately translating to yield loss. Further investigations on the genes and networks identified in the present study pave a way toward genetic improvement of the thermotolerance and reproductive performance of B. napus varieties.

Purpose The interconnections between climate change and health are well studied. However, there is a perceived need for studies that examine how responses to health hazards (e.g. cardiovascular diseases, ozone layer effects, allergens, mental health and vector-borne diseases) may assist in reducing their impacts. The purpose of this paper is to review the evidence on health responses to climate hazards and list some measures to address them. Design/methodology/approach A mixed literature review, bibliometric analysis and an original online survey were undertaken on 140 participants from 55 countries spread across all geographical regions. Findings The bibliometric analysis identified that most climate-related health hazards are associated with extreme weather events. However, only one-third of the investigated papers specifically analysed the connections between climate change and health hazards, revealing a thematic gap. Also, although Africa is highly affected by climate change, only 5% of the assessed studies focused on this continent. Many respondents to the survey indicated “heat distress” as a significant vulnerability. The survey also identified social determinants relevant to climate-induced health vulnerabilities, such as socioeconomic and environmental factors, infrastructure and pre-existing health conditions. Most respondents agree that policies and regulations are the most effective adaptation tools to address the public health hazards triggered by climate change. This paper presents some suggestions for optimising public health responses to health hazards associated with climate change, such as the inclusion of climate-related components in public health policies, setting up monitoring systems to assess the extent to which specific climate events may pose a health threat, establishing plans to cope with the health implications of heatwaves, increased measures to protect vulnerable groups and education and awareness-raising initiatives to reduce the overall vulnerability of the population to climate-related health hazards. These measures may assist the ongoing global efforts to understand better – and cope with – the impacts of climate change on health. Originality/value The combination of a literature review, bibliometric analysis and an original world survey identified and presented a wide range of responses.

Abstract Contemporary climate change is characterized by the increased intensity and frequency of environmental stress events such as floods, droughts, and heatwaves, which have a debilitating impact on photosynthesis and growth, compromising the production of food, feed, and biofuels for an expanding population. The need to increase crop productivity in the context of global warming has fueled attempts to improve several key plant features such as photosynthetic performance, assimilate partitioning, and tolerance to environmental stresses. Chloroplast redox metabolism, including photosynthetic electron transport and CO2 reductive assimilation, are primary targets of most stress conditions, leading to excessive excitation pressure, photodamage, and propagation of reactive oxygen species. Alterations in chloroplast redox poise, in turn, provide signals that exit the plastid and modulate plant responses to the environmental conditions. Understanding the molecular mechanisms involved in these processes could provide novel tools to increase crop yield in suboptimal environments. We describe herein various interventions into chloroplast redox networks that resulted in increased tolerance to multiple sources of environmental stress. They included manipulation of endogenous components and introduction of electron carriers from other organisms, which affected not only stress endurance but also leaf size and longevity. The resulting scenario indicates that chloroplast redox pathways have an important impact on plant growth, development, and defense that goes beyond their roles in primary metabolism. Manipulation of these processes provides additional strategies for the design of crops with improved performance under destabilized climate conditions as foreseen for the future.

Shifts in the timing, intensity and/or frequency of climate extremes, such as severe drought and heatwaves, can generate sustained shifts in ecosystem function with important ecological and economic impacts for rangelands and managed pastures. The Pastures and Climate Extremes experiment (PACE) in Southeast Australia was designed to investigate the impacts of a severe winter/spring drought (60% rainfall reduction) and, for a subset of species, a factorial combination of drought and elevated temperature (ambient +3°C) on pasture productivity. The experiment included nine common pasture and Australian rangeland species from three plant functional groups (C3 grasses, C4 grasses and legumes) planted in monoculture. Winter/spring drought resulted in productivity declines of 45% on average and up to 74% for the most affected species (Digitaria eriantha) during the 6-month treatment period, with eight of the nine species exhibiting significant yield reductions. Despite considerable variation in species’ sensitivity to drought, C4 grasses were more strongly affected by this treatment than C3 grasses or legumes. Warming also had negative effects on cool-season productivity, associated at least partially with exceedance of optimum growth temperatures in spring and indirect effects on soil water content. The combination of winter/spring drought and year-round warming resulted in the greatest yield reductions. We identified responses that were either additive (Festuca), or less-than-additive (Medicago), where warming reduced the magnitude of drought effects. Results from this study highlight the sensitivity of diverse pasture species to increases in winter and spring drought severity similar to those predicted for this region, and that anticipated benefits of cool-season warming are unlikely to be realized. Overall, the substantial negative impacts on productivity suggest that future, warmer, drier climates will result in shortfalls in cool-season forage availability, with profound implications for the livestock industry and natural grazer communities.

Abstract Background The UK has a statutory requirement under the Climate Change Act (2008) to undertake a Climate Change Risk Assessment (CCRA) every five years. The Evidence Report for the Third CCRA, due 2021, will identify the most important current and future risks and opportunities to public health from climate change. It also considers whether present and planned adaptation strategies to are sufficient to manage the risks or additional action is required. Methods The analysis underpinning this review assesses whether risks and actions improve or exacerbate adverse health outcomes and inequalities. This paper reports on the CCRA3 evidence review, which considers the current and likely future impacts of changing flood risk, heatwaves, coastal change, air pollution, vector-borne disease and water quality on public health and healthcare delivery. All risks are assessed by their magnitude, as well as scored by urgency to address them. Results This paper presents the findings for two risks - from heat and coastal flooding impacts on population health and communities. A key focus has been to explore how climate change and policy responses affect the health of vulnerable groups and who could be further disadvantaged by inappropriate adaptation policies. This includes new analysis of the climate risks to health within the built environment and within the health and social care sector. The long-term health consequences of climate change have been considered through potential policy, building and environmental “lock-in”. Such lock-ins include potential risks to inhabitants from overheating due to building regulations failing to address increasing ambient temperatures or homes being built on flood plains. Conclusions Climate change presents challenges to deliver national policy responses ensuring that adaptation remains equitable and optimal for health. The CCRA3 Evidence Report will inform the third UK National Adaptation Plan, setting out Government actions for 2023-2028. Key messages Assess current and future risks and opportunities to public health from climate change. Assess present and planned adaptation strategies for management of risks.

Abstract Issue In recent decades, hospital hygiene has focused on effective control strategies against contact or waterborne transmissions. Outside operating theatres or infection wards, airborne pathogens have played a minor role so far. For public health, the airborne route of transmission also played a subordinate role. Apart from bioterrorism, the focus here is more on chemical and physical hazards. In future, air-associated health hazards will increase. Besides airborne pathogens, examples include insects, heatwaves, particulate matter as well as pollen, mould and radon. Description of the problem No attention has been paid to systematic risk regulation of the transmission mode air. Hospital hygiene is ‘micro-level public health' with a particularly vulnerable population. The experience of hospital hygiene measures can help to develop appropriate public health interventions. Which air hygiene measures have we taken to counter SARS-CoV-2 and how can these be more efficient in the future? Results In response to SARS-CoV-2, face masks were introduced. This has reduced the risk of transmission both in hospitals and in public, but has not completely prevented indirect transmission through aerosols indoors. Ventilation rules further reduced the risk of transmission, but were not applicable everywhere. Since most buildings do not have central air filtration units, the use of decentralised air filters increased, with unknown relevance. Lessons Breathing air cannot be substituted. Therefore, air hygiene is a primary prevention and needs to become more structured to be effective against future air-associated health hazards. Future construction projects for hospitals and public buildings must be adapted to prevention of air-associated health hazards. Hazard and risk analyses, technical, organisational and personal control measures, their monitoring and an incident management should be combined into an ‘Air Safety Plan' as part of a hygiene plan for hospitals and the public. Key messages Breathing air is increasingly polluted by natural or anthropogenic chemical, biological and physical influences and thus becomes a carrier of health hazards, especially for vulnerable groups. Since air cannot be replaced, primary preventive air hygiene based on “Air Safety Plans” will be important in the future as an efficient measure against air-associated hazards such as SARS-CoV-2.