Relevant bibliographies by topics / Dieback

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  2. Dissertations / Theses
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  5. Conference papers
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Academic literature on the topic 'Dieback'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Dieback"

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Gonthier, Paolo, Luana Giordano, and Giovanni Nicolotti. "Further observations on sudden diebacks of Scots pine in the European Alps." Forestry Chronicle 86, no. 1 (February 1, 2010): 110–17. http://dx.doi.org/10.5558/tfc86110-1.

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Since the beginning of the 1990s, significant mortality of Scots pine trees has been observed in inner valleys of the Alps. The objectives of this work were to investigate and describe the aetiology of a Scots pine dieback in the Aosta Valley (western Italian Alps) in 2005. Surveys were conducted in three forest stands. Crown transparency was assessed to evaluate the incidence and severity of dieback symptoms. Phytosanitary surveys were also performed. The time series of the major climatic parameters was analyzed in order to identify common climatic anomalies between the dieback of 2005 and similar dieback episodes in other periods and in other areas of the western Alps. Dendrochronological analyses were performed to assess the relationship between tree-ring widths and climatic parameters. The lack of primary biotic agents and the low frequency of secondary pathogens suggest an abiotic origin of diebacks. The time series analysis shows that two consecutive years with a value of summer dryness index below 1.5 preceded the diebacks. Tree-ring width and summer dryness index were strongly and significantly associated. Key words: climate change, forest dieback, Scots pine, crown transparency, ecophysiology, tree-ring width
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Hood, Ian. "Kauri dieback." Plant Pathology 70, no. 4 (April 4, 2021): 764–66. http://dx.doi.org/10.1111/ppa.13356.

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Frey, Brent R., Victor J. Lieffers, EH (Ted) Hogg, and Simon M. Landhäusser. "Predicting landscape patterns of aspen dieback: mechanisms and knowledge gaps." Canadian Journal of Forest Research 34, no. 7 (July 1, 2004): 1379–90. http://dx.doi.org/10.1139/x04-062.

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Sudden dieback and deterioration of mature aspen stands is commonly observed throughout North America. This dieback process has tremendous ecological and economic importance, yet remains poorly understood. This paper summarizes our understanding of aspen dieback in North America, identifies potential processes that contribute to reduced vigour and dieback of aspen stands, and examines the scales (stand, ecosite, regional) at which these processes operate. Many factors including pathogens, nutrition, or successional changes may be involved in the decline of aspen vigour and thereby contribute to the dieback process. However, insect defoliation, drought, and thaw–freeze events appear to be the most likely factors initiating dieback in mature aspen stands. Further study is clearly needed to elucidate the mechanisms and landscape patterns of dieback. Information needs related to identifying processes and modeling landscape patterns of dieback are indicated.
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Loehle, Craig. "Forest ecotone response to climate change: sensitivity to temperature response functional forms." Canadian Journal of Forest Research 30, no. 10 (October 1, 2000): 1632–45. http://dx.doi.org/10.1139/x00-088.

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Past simulation studies using a variety of models have generally agreed that climatic warming could have adverse effects on forests, including large-scale diebacks in some regions and drastic range shrinkages of many species. These effects should be most evident at biome transition zones. Other studies have pointed out, however, that past models have used a parabolic temperature response function that is based on geographic range limits rather than functional responses or data and that this parabolic model could exaggerate dieback effects. A new model is proposed for growing degree-days temperature response, which is asymptotic rather than parabolic. In this new model, tree height growth rate increases and then levels off with increasing growing degree-days. Species from more southern regions have a higher asymptote. It is shown that this model can be derived from the integration of a parabolic growth response to temperature over a year-long sinusoidal temperature regime. The SORTIE forest simulation model was modified to incorporate this response function. An ecotonal region was simulated under a warming scenario. The traditional parabolic temperature response model produced a wide zone of dieback following warming. In contrast, the new asymptotic response function produced no dieback and a stable ecotone that migrated north at <100 m/100 years.
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Hassanpour, Noorallah, and Mehdi Arzanlou. "Ash Dieback Disease." Plant Pathology Science 8, no. 2 (September 1, 2019): 70–76. http://dx.doi.org/10.29252/pps.8.2.70.

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Crombie, D. Stuart, and J. T. Tippett. "A comparison of water relations, visual symptoms, and changes in stem girth for evaluating impact of Phytophthoracinnamomi dieback on Eucalyptusmarginata." Canadian Journal of Forest Research 20, no. 2 (February 1, 1990): 233–40. http://dx.doi.org/10.1139/x90-032.

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Water relations, stem girth, and crown vigour were measured in jarrah (Eucalyptusmarginata Donn ex Sm.) trees in adjoining areas of healthy and dieback-affected forest. The soil-borne fungus Phytophthoracinnamomi Rands was recovered from soils in the dieback areas, but not from neighbouring healthy forest. Trees on dieback sites were found to be more water stressed (with lower dawn water potentials and daytime stomatal conductances) than healthy trees on nearby areas free of P. cinnamomi. Severe water stress usually preceded crown deaths by several weeks to months. Dawn water potential and midday stomatal conductance were the most useful nondestructive indicators of dieback severity in declining trees. Subjective assessment of crown form was slightly less reliable than water relations as a separator of dieback and healthy trees. Changes in trunk girth were the least sensitive indicators of dieback severity. Midday stomatal conductance is recommended as a useful tool for monitoring short-term changes in vigour of dieback-affected trees.
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Sun, Shoujia, Lanfen Qiu, Chunxia He, Chunyou Li, Jinsong Zhang, and Ping Meng. "Drought-Affected Populus simonii Carr. Show Lower Growth and Long-Term Increases in Intrinsic Water-Use Efficiency Prior to Tree Mortality." Forests 9, no. 9 (September 13, 2018): 564. http://dx.doi.org/10.3390/f9090564.

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The Three-North Shelter Forest (TNSF) is a critical ecological barrier against sandstorms in northern China, but has shown extensive decline and death in Populus simonii Carr. in the last decade. We investigated the characteristics—tree-ring width, basal area increment (BAI), carbon isotope signature (13Ccor), and intrinsic water-use efficiency (iWUE)—of now-dead, dieback, and non-dieback trees in TNSF shelterbelts of Zhangbei County. Results from the three groups were compared to understand the long-term process of preceding drought-induced death and to identify potential early-warning proxies of drought-triggered damage. The diameter at breast height (DBH) was found to decrease with the severity of dieback, showing an inverse relationship. In all three groups, both tree-ring width and BAI showed quadratic relationships with age, and peaks earlier in the now-dead and dieback groups than in the non-dieback group. The tree-ring width and BAI became significantly lower in the now-dead and dieback groups than in the non-dieback group from 17 to 26 years before death, thus, these parameters can serve as early-warning signals for future drought-induced death. The now-dead and dieback groups had significantly higher δ13Ccor and iWUEs than the non-dieback group at 7–16 years prior to the mortality, indicating a more conservative water-use strategy under drought stress compared with non-dieback trees, possibly at the cost of canopy defoliation and long-term shoot dieback. The iWUE became significantly higher in the now-dead group than in the dieback group at 0–7 years before death, about 10 years later than the divergence of BAI. After the iWUE became significantly different among the groups, the now-dead trees showed lower growth and died over the next few years. This indicates that, for the TNSF shelterbelts studied, an abrupt iWUE increase can be used as a warning signal for acceleration of impending drought-induced tree death. In general, we found that long-term drought decreased growth and increased iWUE of poplar tree. Successive droughts could drive dieback and now-dead trees to their physiological limits of drought tolerance, potentially leading to decline and mortality episodes.
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Nurafida, Desi, Achmad ., and Syamsul Falah. "KEEFEKTIFAN KITOSAN DALAM MENGENDALIKAN Botryodiplodia theobromae Pat. PENYEBAB MATI PUCUK PADA BIBIT JABON (Anthocephalus cadamba (Roxb.) Miq) Chitosan’s Effectiveness in Controlling Dieback by Botryodiplodia theobromae Pat on Jabon Seeding." Journal of Tropical Silviculture 8, no. 3 (March 19, 2018): 170–76. http://dx.doi.org/10.29244/j-siltrop.8.3.170-176.

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Dieback disease by the fungus Botryodiplodia theobromae in Jabon seedlings (Anthocephalus cadamba) inhibits the regeneration of Jabon plant. Synthetic fungicides utilization to several problems such as residue on the environment and pathogen resistance. Chitosan is a potential natural compound used as an alternative to control plant disease.This research aims to examine the effectiveness of chitosan to control B. theobromae as causal agent of dieback on Jabon seedlings and to examine the effect of chitosan to control the viscosity of dieback disease on Jabon seedlings. The results showed that the chitosan solution can decrease the severity of disease in Jabon seedlings. However, it was different with the disease incidence rate parameter. Chitosan solution was not significantly affecting the disease because B. theobromae caused dieback symptoms on Jabon seedlings. The most effective treatment was chitosan solution with a concentration of 0.1% before inoculation with the severity of the disease by 25%. Chitosan solution viscosity was responsible in affecting the percentage of dieback disease in Jabon seeds. The higher the viscosity of chitosan, the higher the percentage of dieback disease attacks. The best viscosity to suppress the development of dieback disease on Jabon seedlings was 8.80 with 7.90% attack.Key words: Anthocephalus cadamba , Botryodiplodia theobromae, chitosan, dieback.
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Roy, Gabriel, Guy R. Larocque, and Colette Ansseau. "Retrospective evaluation of the onset period of the visual symptoms of dieback in five Appalachian sugar maple stand types." Forestry Chronicle 80, no. 3 (June 1, 2004): 375–83. http://dx.doi.org/10.5558/tfc80375-3.

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In the early 1980s, a sharp increase in dieback of sugar maple (Acer saccharum Marsh.) was reported across large areas of the north-eastern American continent. Despite numerous studies, there are conflicting interpretations as to the causes of dieback that can be linked to uncertainties as to when the occurrence of the visual symptoms appeared. Three different approaches were used to determine the onset period of the visual symptoms of dieback in Appalachian sugar maple stands: (1) dendrochronological analysis; (2) retrieval of information in official documents that reported dieback symptoms; and (3) development of a questionnaire sent to private forest land owners. Dieback severity was evaluated annually in 104 Appalachian sugar maple stands in southwestern Quebec. Results indicated that the pattern of dieback progression did not vary significantly among the five different types of sugar maple stand that were examined. The three investigative approaches led to the conclusion that the onset of the visual symptoms occurred between 1974 and 1978. Key words: Acer saccharum Marsh., dieback, sugar maple, symptoms, progression
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Clift, DK, WS Semple, and JC Prior. "A survey of Bladder Saltbush (Atriplex vesicaria Heward ex Benth) dieback on the Riverine Plain of south-eastern Australia from the late 1970s to 1983." Rangeland Journal 9, no. 1 (1987): 39. http://dx.doi.org/10.1071/rj9870039.

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Bladder saltbush (Ahiplex vesicaria Heward ex Benth) is a valuable perennial chenopod shrub of the northem Riverine Plain of south-eastem Australia. From 1977 to 1983, dieback affected stands of this shrub over a wide area, reducing the drought reserves on many pastoral holdings. By early 1983 reports of new outbreaks of dieback had ceased, and by late 1983 regeneration, both vegetatively and from seedlings, was evident in most areas. This study reviews what is known of this dieback event. The extent of healthy bladder saltbush stands, pre-dieback and towards the end of the dieback period was mapped. It was found that the area of leafy bush had declined by 53 per cent, from 1.1 to 0.5 million hectares, by the end of 1983. There was considerable variation in timing, pattern and progress of dieback. The cause was not established.
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Dissertations / Theses on the topic "Dieback"

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Evans, David Paul. "Biological indicators of forest dieback." Thesis, University of South Wales, 1992. https://pure.southwales.ac.uk/en/studentthesis/biological-indicators-of-forest-dieback(514886c2-00a0-4280-aca2-a500e3e794cb).html.

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This study involved the determinations of the foliar levels of chlorophyll a and b and metal levels in the year 1, year 2 and year 3 needles of Sitka spruce. A survey was made of nineteen sites in the Afan 1 forest in South Wales. The results obtained indicates that there are two distinct types of site, namely good growth sites and poor growth sites. The poor growth sites were found to be at higher elevations. Further analyses of the results show that there is possibly an increased loss of nutrients from the trees at the poor growth sites. This may be due to increased pollution that may be present at the higher elevations. In 1987 a survey was made of the one year old epicormic tissues that were compared with the normal tissues at the 19 sites of the Afan 1 Forest There were no statistically significant differences in the levels of the chlorophylls or in any of the metals that were looked at. At the Afan 1 Forest there are observed pairs of trees that are growing quite close together, but they exhibit quite a marked difference in growth. One of the pair shows vigorous healthy growth, whilst the other is stunted and shows symptoms of decline. One such pair is found at Site 15. They are of the same age and from the same seed stock. It was found that over an eight month period, the stronger growing of the pair had significantly higher levels of chlorophyll a and b, potassium, calcium and magnesium. This may indicate increased leaching and foliar damage from the poorer growing of the pair. Three more pairs of trees together with their grafts were examined from sites' 1,5 and 6, for their levels of peroxidase enzymes. Peroxidase has been used to determine possible genetic differences in cultivars. The work yielded very little useful information. The SCOR-UNESCO equations have been widely used as a means of determining chlorophyll levels from plant extracts. A multivariate calibration method was used in conjunction with HPLC to determine the accuracy of these equations for determining the levels of chlorophyll and b. The results show revealed that the equations appear to be underestimating the chlorophyll a levels. Leading on from the HPLC work, a novel method for the separating a mixture of chlorophyll a and b was developed using packed column SFC. The method appears to be quite promising with its better resolution and faster analysis times as compared to FIPLC methods. Sitka spruce seedlings were grown in COIR (coconut husk) and were used in and were used in a central composite design to determine the effects of cadmium and copper, both singly and in combination would have upon their growth. Response surface methodology was used to determine the effects and it was found from the experiment that high levels of cadmium appeared to have an effect upon the elongation of the needles of the new shoots.
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Nobrega, Caroline Correa. "Amazon forest dieback: assessing vulnerabilities and threats." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/5873.

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Submitted by Erika Demachki (erikademachki@gmail.com) on 2016-08-05T18:37:46Z No. of bitstreams: 2 Tese - Caroline Correa Nobrega - 2016.pdf: 4990749 bytes, checksum: 427c1ea06410c4fb5c6092e4e2cc351d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-08-09T12:01:33Z (GMT) No. of bitstreams: 2 Tese - Caroline Correa Nobrega - 2016.pdf: 4990749 bytes, checksum: 427c1ea06410c4fb5c6092e4e2cc351d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
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In recent years, it is increasing evidences about Amazon vunerability due to land use and climate changes. Because of a positive feedback system, in which impacts intensify other impacts, some models project to the end of the century a replacement of the Amazon forest by savanna formations or semi-arid (forest dieback). Several evidence has indicated a high vulnerability of the Amazon to global climate change and local environmental impacts triggered by human activities (eg conversion to agricultural areas, construction of roads and burns). However, they are still deeply unknown the general mechanisms and standards about how these impacts affect the forest. In this thesis, I developed works that aim contribute to discussions of the subject. In each chapter, I will consider a threat that is contributing to the degradation of the Amazon. Each of the three threats discussed in the following chapters are often cited as important drivers of forest dieback. In the first chapter I evaluated the impact of forest fires at different levels of diversity of trees in a forest area next to the Amazon-Cerrado transition. Our results suggest that communities of trees in burned areas are losing more phylogenetic and functional diversity per unit of species than in unburned areas. My results indicate the existence of selection of species based on phylogenetic and functional characteristics, representing a major force of change and impoverishment (functional and phylogenetically) of these communities. In the second chapter, using high resolution images (LiDAR and hyperspectral), I evaluated the impact of a intense drought in forest areas near Madre de Dios, Peru. Thus, my results support the idea that changes in regional climate may change the structure and function of the forest. In the third chapter, I evaluated how the construction of roads in the Brazilian Amazon has contributed to deforestation in an important group of protected areas of the Amazon: the Indigenous Lands. Based on the analysis of observed impacts, I propose the establishment of buffer zones (buffers) around these reserves to reduce the negative impacts of road construction planned to be built.
Nos últimos anos, tem surgido cada vez mais evidências que a Amazônia pode estar ameaçada em decorrências das mudanças regionais no clima e no uso do solo. Por causa de um sistema de retroalimentação positivo, em que impactos intensificam outros impactos, alguns modelos projetam para o final do século uma substituição da floresta amazônica por formações tipo savana ou semiáridas (forest dieback). Diversas evidências têm indicado uma alta vulnerabilidade da Amazônia às mudanças climáticas globais e aos impactos ambientais locais desencadeados por atividades humanas (e.g. conversão de áreas para agropecuária, construção de estradas e queimadas). Entretanto, são ainda profundamente desconhecidos os mecanismos e padrões gerais de como esses impactos afetam a floresta. Nesta tese, desenvolvi trabalhos que têm como objetivo contribuir para as discussões do tema. Em cada capítulo, abordarei uma ameaça que, de alguma forma, está contribuindo para a degradação da Amazônia. Cada uma das três ameaças discutidas nos próximos capítulos são, frequentemente, apontadas como importantes propulsores de forest dieback. No primeiro capítulo avaliei o impacto de incêndios florestais em diferentes níveis de diversidade de árvores de uma área florestal próxima à transição Amazônia-Cerrado. Nossos resultados sugerem que as comunidades de árvores das áreas queimadas estão perdendo mais diversidade filogenética e funcional por unidade de espécie do que nas áreas não queimadas. Nossos resultados indicam a existência de seleção de espécies com base em características filogenéticas e funcionais, que representam uma importante força de mudança e de empobrecimento (funcional e filogeneticamente) dessas comunidades. No segundo capítulo, usando imagens de alta resolução (LiDAR e hiperespectral), eu avaliei o impacto de um período de seca em áreas florestais próximas a Madre de Dios, Peru. Nossos resultados dão suporte a hipótese de que mudanças no clima regional modificam a estrutura e função da floresta. No terceiro capítulo, eu avaliarei de que forma a construção de estradas na Amazônia brasileira tem contribuído para o desmatamento que incide em um importante grupo de áreas protegidas da Amazônia: as Terras Indígenas. Com base na análise dos impactos observados, nós propomos o estabelecimento de zonas de amortecimento (buffers) em torno dessas reservas para reduzir os impactos negativos da construção de estradas planejadas para serem construídas.
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Hill, Louise. "Ecological impacts of ash dieback in Great Britain." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:941ee684-798b-47b6-ae51-64baeb5f821e.

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Ash dieback is a severe disease of ash trees (Fraxinus spp.), caused by the invasive fungus Hymenoscyphus fraxineus. In its native East Asia, H. fraxineus is a harmless endophyte, but since its accidental import into Europe in the early 1990s it has infected over 90% of ash trees in some areas, with long-term mortality sometimes exceeding 90%. The disease was discovered in Great Britain in 2012, and has since spread rapidly. This thesis investigates some of the possible impacts on biodiversity, ecosystem functioning, and society, and in doing so identifies ways to alleviate some impacts. Britain has only 13% tree cover (among the lowest in Europe), so may be particularly vulnerable to ash loss. Better understanding of the effects and how to minimise them is critical to deliver an evidence-based response. First, we investigated impacts in woodlands by experimentally killing woodland ash trees by ring-barking. We found no short-term effect of ash loss on ground flora or earthworm communities, or on the regeneration or growth of other woody species. Observational evidence suggested that remaining canopy trees rapidly filled gaps left by ash, perhaps contributing to stability. Our woodlands appeared to be remarkably resilient to ash loss, although there may be long-term effects or impacts on other species that this experiment failed to observe. To investigate broader-scale impacts, we required high-quality abundance maps for ash and other trees across Britain. Using species distribution modelling and random forest regression, we developed a protocol to produce abundance maps from readily available data. We tested the predictive power of the resulting maps using cross validation. Our maps are the best available for abundance of British tree species, and will be useful across a wide range of disciplines. We then used them to model ecosystem vulnerability to ash loss, based on the abundance of ash and other tree species, and their ecological trait similarity. We identified areas at risk of the largest impacts, and produced guidance for positive management actions to minimise ecological change. Lastly, we investigated the financial impacts of ash dieback, estimating the total cost to Britain at £9.2 billion. This figure is many times larger than the value of lost trade if biosecurity were improved to prevent future invasions, questioning the validity of financial arguments against biosecurity. We also found that loss of ecosystem services accounted for less than a third of the total cost, suggesting that ecosystem service assessments may miss a large proportion of the true cost of biodiversity loss. Overall, we found that some impacts may be less than expected, such as local effects on woodland ground flora, and others, such as the economic cost, may be much larger than expected. However, the resilience of ecosystems to a major shock such as loss of a common species, and actions to mitigate the impacts, depend on having a diversity of other trees present. The ash dieback outbreak highlights the importance of preventing other severe pests and diseases of trees from being introduced; something that has been increasing exponentially, largely due to international trade in trees. This thesis provides further firm evidence that there is an ecological and social imperative to halt this trend.
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Lardner, Richard. "Early diagnosis and detection of Eutypa dieback of grapevines." Title page, table of contents and abstract only, 2003. http://hdl.handle.net/2440/37969.

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Eutypa dieback of grapevines, caused by Eutypa lata, is a major cause of reduced longevity in vineyards worldwide. The fungus grows in the woody tissue of infected vines, producing translocatable toxins that cause foliar symptoms of the disease. By the time foliar symptoms are evident the pathogen may have become well established in the vine. One aim of this study was to develop DNA markers to allow rapid reliable identification of E. lata and to detect the pathogen in infected wood. The second aim was to analyse secondary metabolite production by E. lata in order to gain information on the compounds responsible for the foliar symptoms of the disease and to identify metabolites which could be used as markers to detect the early stages of the disease prior to the expression of foliar symptoms. In addition, genetic variation of the pathogen was assessed using RFLP and RAPD analysis. Two techniques were used to develop DNA markers; first, SCAR markers derived from RAPD fragments were developed and, second, an E. lata genomic DNA library was constructed, from which DNA fragments specific to E. lata were identified. These markers were used in either PCR- or Southern hybridisation-based assays to detect the pathogen in infected wood. PCR-based detection of the pathogen in infected wood was prone to inhibition by phenolic compounds, however, Southern hybridisation techniques were capable of detecting E. lata in wood. Genetic variation among 38 isolates of E. lata was assessed using six randomly selected clones from the genomic DNA library. A subset of 11 isolates was subjected to RAPD analysis using 10 random primers. Considerable genetic diversity, in terms of RFLP and RAPD profiles, was observed among isolates. There was no apparent correlation between grouping of isolates following neighbour joining analysis and either host species or geographic origin of isolates. The RAPD and RFLP profiles of two isolates differed significantly from the majority of the other isolates. These isolates, which were morphologically similar to all other isolates, were subsequently found not to be E. lata. Secondary metabolite production of 11 isolates was analysed by HPLC following growth on a range of media. A wider range of secondary metabolites was detected in E. lata than has previously been reported. Two of the secondary metabolites, eutypine and an unidentified compound with a retention time of 19.6 min, were produced by eight of nine isolates of E. lata. Neither of the non-E. lata isolates produced these compounds. It was concluded that the remaining isolate of E. lata may have lost the ability to produce these compounds following storage. Whilst a wider range of isolates needs to be screened before a candidate marker can be selected, these results suggest that certain compounds are present in the majority of E. lata isolates and, hence, may prove suitable markers for the detection of the pathogen prior to the expression of foliar symptoms. The molecular probes developed in this study will allow the rapid and reliable identification and detection of E. lata in grapevine cane or wood. These probes also have the potential to be used as a research tool to gather information on the epidemiology of the disease and to assess the efficacy of potential control agents against E. lata. Suitable control measures could then be applied to vines which have been shown by the use of chemical markers to have latent infection. Used in combination, therefore, the DNA and biochemical markers could facilitate improved management of eutypa dieback.
Thesis (Ph.D.) -- University of Adelaide, School of Agriculture and Wine, 2003.
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Raiter, Keren. "Bush tucker and dieback : the threat of dieback caused by Phytophthora cinnamomi to plants of significance to Noongar people of Western Australia's south coast." Thesis, Raiter, Keren (2005) Bush tucker and dieback : the threat of dieback caused by Phytophthora cinnamomi to plants of significance to Noongar people of Western Australia's south coast. Honours thesis, Murdoch University, 2005. https://researchrepository.murdoch.edu.au/id/eprint/32600/.

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Rolshausen, Philippe. "Biology and control of Eutypa dieback of grapevine in California /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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Singh, Gurpreet. "Identification of Quantitative Trait Loci (QTL) associated with resistance to Vascular Streak Dieback disease of cacao." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/29254.

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Vascular-Streak Dieback (VSD) disease of cacao, caused by the fungus Ceratobasidium theobromae, has devastating impacts on cacao production in southeast Asia and Oceania. This study aimed to identify genomic regions associated with resistance to VSD using a population derived from a cross between the cocoa genotypes S1 (VSD resistant) and CCN51 (VSD susceptible). QTL analysis was performed using a genetic linkage map constructed with 8,698 DArT markers and 1,470 SNP markers. Two QTL were detected, one on linkage group 8 and the other on linkage group 9. The QTL on linkage group 8 explained 15-16% of the phenotypic variation while the QTL on linkage group 9 explained 16-18% of the phenotypic variation. Five polymorphic microsatellite (SSR) markers were identified within the QTL regions. SSR markers showed clear polymorphism among the VSD resistant and susceptible lines in the two populations, S1 x CCN51 and CCN51 x M07. These results suggest that these markers could be closely associated with VSD resistance and therefore used in marker-assisted selection for cacao breeding programs in response to VSD disease. Further, genomes of the S1 and CCN51 genotypes were sequenced using paired end short reads. Both S1 and CCN51 whole genome sequencing generated 383 and 367 million clean reads, respectively, and 93% of reads from both S1 and CCN51 mapped to the reference genome Matina 1-6. Alignment to the reference genome enabled the detection of 1.87 million polymorphic SNVs/Indels and 8,363 polymorphic structural variants (SVs) among the two genomes. The resequencing of the genomes of cacao genotypes S1 and CCN51 provides a valuable resource to narrow the search for candidate genes that underlie VSD resistance.
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Cujec, Thomas Peter. "Incidence, etiology and epidemiology of stonefruit dieback in the Okanagan Valley." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27865.

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A Cytospora species isolated from infected tissues and sporulating stromata on diseased trees caused typical dieback symptoms when inoculated into Prunus species and was identified as the primary cause of stonefruit dieback in the Okanagan. Based on the morphology of the stromata, spore dimensions, and colony growth and color on malt extract agar, the fungus was identified as C. leucostoma (Sacc). After including the number of trees removed during the winter of 1985-86 and 1986-87 because of Cytospora sp., an average of 14.8% of the trees in 17 stonefruit orchards were affected by dieback from September 1985 to September 1987. The incidence of Cytospora sp. in the individual blocks ranged from 3.0-56.9%. In 11 of the 17 orchards surveyed in 1986 and resurveyed in 1987, dieback symptoms were evident on trees which had been symptomless in 1986. The percent of newly infected trees in these 11 blocks ranged from 0.4-8.8% and averaged 2.9%. The majority of sporulating Cytospora sp. infections were found on the scaffold limbs (69%) or trunks (28%) of infected trees. Pruning wounds (65%), rather than winter injury (25%), were the major infection courts. Fall and spring inoculations of a spore suspension (10³ spores/ml) of either a peach isolate (P8-19) to peach, or a cherry isolate (C9-23) to cherry revealed that intraspecies spread of the disease can occur at any time of the year. Although spring spore inoculations of the peach isolate to cherry or the cherry isolate to peach resulted in significantly (P = 0.05) more infections than the control treatments, identical fall inoculations did not. This suggests that spread of Cytospora sp. between cherry and peach is most likely to occur in the spring. The effect of temperature on spore germination and mycelial growth of Cytospora sp. in vitro was isolate-dependent. The minimum lag period for Cytospora sp. spore germination occurred at 27° C. Spores germinated at temperatures as low as 10° C, and remained viable even after exposure to -18° C for 1 week. The temperature optima for the in vitro growth of most stonefruit isolates in this study was 20-23° C. Viable Cytospora sp. spores were washed from infected trees (10⁵-10⁶ spores/ml) and adjacent healthy trees (10⁴ spores/ml) in mid-December and collected in funnel traps after the first rain the following spring (late April). Under Okanagan conditions, infection of fresh pruning wounds made in the spring can occur either by spores which overwintered on infected trees and were dispersed by spring rains, or by spores dispersed by fall rains to healthy trees on which they overwintered and infected following pruning. Benomyl (1 g a.i./L), dichlone (1 g a.i./L), flusilazole (0.01 g a.i./L) and ziram (5 g a.i./L) applied as water sprays did not significantly (P = 0.1) reduce the percent infection compared to the unprotected, inoculated controls. Of eight fungicide-pruning paste mixtures, only benomyl added to either Heal 'n' Seal or linseed oil significantly (P = 0.1) reduced the number of cankers which developed compared to the untreated control.
Land and Food Systems, Faculty of
Graduate
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Reich, Richard William. "Causes of dieback of Douglas-fir in the interior of B.C." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29780.

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Frost damage to sapling size plantation Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco.] in the central interior of B.C. was identified as the major cause of dieback and canker through tree dissections. Prominent frost rings in the wood and frost damage to buds and shoots corresponded to the dates of dieback initiation and canker events throughout the history of the plantations. Frost rings and frost cankers were reproducible using an artificial freezing technique. Symptomatic frost-damaged buds and elongating shoots were described for Douglas-fir, white spruce [Picea glauca (Moench) Voss] and subalpine fir [Abies lasiocarpa (Hook.) Nutt.]. The effect of growing season frost was most noticeable on early flushing trees. Frost and dieback damage was most severe on concave and flat landforms, which are conducive to cold air pooling on nights with strong radiative cooling. Several pathogens isolated from recently killed stems were identified from fruiting bodies and culture. Leucocytospora kunzei (Sacc.) Urban was the pathogen most commonly isolated from the edge of expanding cankers and progressive dieback margins. Sclerophoma semenospora Funk was commonly found fruiting on dead stems and leaders killed by frost or by mechanical means. Cinara pseudotaxifoliae Wilson feeding caused latent cankers on one year old leaders of Douglas-fir, which are thought to be activated by frost. Boron levels of both healthy and severely affected trees were in the intermediate range, and were not considered to play an important role in frost or pathogen susceptibility for Douglas-fir in the interior.
Forestry, Faculty of
Graduate
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Khattab, Islam Maged Abdelazeem [Verfasser], and P. [Akademischer Betreuer] Nick. "Ancestral Grapes with Resistance against Dieback: Molecular and Functional Analysis of Plant-pathogen Crosstalk in the Context of Botryosphaeriaceae Related Dieback / Islam Maged Abdelazeem Khattab ; Betreuer: P. Nick." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1231361654/34.

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Books on the topic "Dieback"

1

Michaels, S. J. Dieback. London: Pan Books, 1992.

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Michaels, S. J. Dieback. London: Macmillan, 1991.

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Davis, R. I. Kava dieback. Noumea: Secretariat of the Pacific Community, 1999.

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Heatwole, Harold. Dieback, death of an Australian landscape. Frenchs Forest, NSW: Reed, 1986.

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Podger, F. D. Dieback in Western Australia. Perth: Western Australian Dieback Review Panel, 1996.

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Rose, Chris. Final report: tree dieback survey. London: Friends of the Earth, 1986.

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Pathak, Saroj N. Industrial air pollution and forest dieback. Oakville, Ont: Aktrin Research Institute, 1989.

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Husted, Lynn Diane. Dieback of container-grown Douglas Fir seedlings. [Victoria, B.C.]: Forestry Canada, 1989.

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Vergara, Walter. Assessment of the risk of Amazon dieback. Washington, D.C: The World Bank, 2011.

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Wylie, F. R. Decline of Casuarina and Eucalyptus in the Mary River catchment. [Brisbane]: Dept. of Primary Industries, Forest Service, 1993.

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Book chapters on the topic "Dieback"

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De Temmerman, L., A. Ronse, K. Van Den Cruys, and K. Meeus-Verdinne. "Ammonia and Pine Tree Dieback in Belgium." In Air Pollution and Ecosystems, 774–79. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-4003-1_95.

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McMahon, Peter, and Agus Purwantara. "Vascular Streak Dieback (Ceratobasidium theobromae): History and Biology." In Cacao Diseases, 307–35. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-24789-2_9.

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Dell, B., and N. Malajczuk. "Jarrah dieback — A disease caused by Phytophthora cinnamomi." In The Jarrah Forest, 67–87. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-3111-4_6.

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Lowman, M. D., and H. Heatwole. "Rural Dieback in Australia and Subsequent Landscape Amelioration." In Forest Decline in the Atlantic and Pacific Region, 307–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-76995-5_24.

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Umeda, Colin, Akif Eskalen, and Timothy D. Paine. "Polyphagous Shot Hole Borer and Fusarium Dieback in California." In Insects and Diseases of Mediterranean Forest Systems, 757–67. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-24744-1_26.

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Ellenberg, Heinz. "Botanical Aspects of Landscape Ecology with Outlooks on Forest Dieback." In Progress in Botany / Fortschritte der Botanik, 1–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-79844-3_1.

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Jeltsch, F., and C. Wissel. "Modelling Factors Which May Cause Stand-Level Dieback in Forest." In Forest Decline in the Atlantic and Pacific Region, 251–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-76995-5_19.

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Estivalet, D., R. Perrin, and F. Le Tacon. "Investigations on the Telluric Microbiological Features of Forest Dieback in Vosges." In Air Pollution and Ecosystems, 852–58. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-4003-1_108.

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Lawesson, Jonas Erik. "Stand-level dieback and regeneration of forests in the Galápagos Islands." In Temporal and Spatial Patterns of Vegetation Dynamics, 87–93. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2275-4_10.

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Smith, William H. "Forest Dieback/Decline: A Regional Response to Excessive Air Pollution Exposure." In Air Pollution and Forests, 501–24. New York, NY: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4612-3296-4_18.

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Conference papers on the topic "Dieback"

1

Kelly, Jacque L., Christine M. Hladik, and Quincy T. Tom-Jack. "GROUNDWATER AND ELECTRICAL RESISTIVITY SURVEYS OF MARSH DIEBACK LOCATIONS IN COASTAL GEORGIA." In 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273701.

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Polk, Sam L., Aland H. Y. Chan, Kangning Cui, Robert J. Plemmons, David A. Coomes, and James M. Murphy. "Unsupervised Detection of ASH Dieback Disease (Hymenoscyphus Fraxineus) Using Diffusion-Based Hyperspectral Image Clustering." In IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2022. http://dx.doi.org/10.1109/igarss46834.2022.9883429.

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"Mitigation of Pb-Induced Forest Dieback in Sri Lanka: Use of Soil Organic Matter." In International Conference on Agricultural, Ecological and Medical Sciences. International Institute of Chemical, Biological & Environmental Engineering, 2015. http://dx.doi.org/10.15242/iicbe.c0215118.

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Dodge, Christine. "Field evaluation of lures to attract Euwallaceaspp. nr.fornicatus (Coleoptera: Scolytinae), the vectors of Fusarium dieback." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114897.

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Hoshino, Buho, Takashi Sasamura, Atsuko Sugimoto, Tserenochir Tserendulam, Uuganbayar Ganbold, Christopher McCarthy, and Masami Kaneko. "Studies on the Forest Dieback Phenomenon in a Semi-Arid Region Using Remotely Sensed Data." In IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2018. http://dx.doi.org/10.1109/igarss.2018.8518612.

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Liu, Qingsheng, and Gaohuan Liu. "Using Tasseled Cap Transformation of CBERS-02 Images to Detect Dieback or Dead Robinia Pseudoacacia Plantation." In 2009 2nd International Congress on Image and Signal Processing (CISP). IEEE, 2009. http://dx.doi.org/10.1109/cisp.2009.5304005.

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Hoshino, Buho, Daishi Matsukawa, Takashi Sasamura, Tserendulam Tserenochir, Uuganbayar Ganbold, Christopher McCarthy, Masami Kaneko, and Atsuko Sugimoto. "Microtopographical Characteristics of Forest Dieback in a Semi-Arid Region Retrieved from Ground and Satellite Data." In IGARSS 2021 - 2021 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2021. http://dx.doi.org/10.1109/igarss47720.2021.9554115.

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Ramsey, Elijah, and Amina Rangoonwala. "Characterizing the marsh dieback spectral response at the plant and canopy level with hyperspectral and temporal remote sensing data." In 2008 IEEE/OES US/EU-Baltic International Symposium (BALTIC). IEEE, 2008. http://dx.doi.org/10.1109/baltic.2008.4625515.

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Brunetti, Cecilia, Antonella Gori, Francesca Alderotti, Raffaella Balestrini, Fabiano Sillo, Dalila Pasquini, Francesco Ferrini, and Mauro Centritto. "Widespread holm oak dieback in Mediterranean forests: the roles of carbon stress and hydraulic failure under recurrent drought events." In The 1st International Electronic Conference on Plant Science. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/iecps2020-08861.

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Dibble, Michael Samuel, and Christine M. Hladik. "EXAMINATION OF SALT MARSH DIEBACK DEVELOPMENT AND RECOVERY WITH THE USE OF HISTORICAL AERIAL PHOTOGRAPHY AND ENVIRONMENTAL AND CLIMATIC CONDITIONS." In 66th Annual GSA Southeastern Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017se-291415.

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Reports on the topic "Dieback"

1

Koenig, L. A., R. D. Penzhorn, and H. Schuettelkopf. Nuclear technology and forest dieback. Office of Scientific and Technical Information (OSTI), January 1985. http://dx.doi.org/10.2172/8120993.

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Solomon, J. D., A. Dan Wilson, Theodor D. Leininger, D. G. Lester, C. S. McCasland, S. Clarke, and C. Affeltranger. Sugarberry Dieback and Mortality in Southern Louisiana: Cause, Impact, and Prognosis. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 1997. http://dx.doi.org/10.2737/srs-rp-009.

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Solomon, J. D., A. Dan Wilson, Theodor D. Leininger, D. G. Lester, C. S. McCasland, S. Clarke, and C. Affeltranger. Sugarberry Dieback and Mortality in Southern Louisiana: Cause, Impact, and Prognosis. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 1997. http://dx.doi.org/10.2737/srs-rp-9.

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Hall, R. J., J. J. van der Sanden, J. T. Freeburn, and S. J. Thomas. Remote sensing of natural disturbance caused by insect defoliation and dieback: a review. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/299044.

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Kessler, Kenneth J. Jr. Basal Trunk And Buttress Root Injuries May Be Associated With Branch Dieback In Black Oak. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1992. http://dx.doi.org/10.2737/nc-rn-358.

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Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Fort Pulaski National Monument: 2019 data summary. National Park Service, December 2021. http://dx.doi.org/10.36967/nrds-2288716.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and monitoring is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort on four SECN parks, including Fort Pulaski National Monument (FOPU). Twelve vegetation plots were established at Fort Pulaski National Monument in August. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Fort Pulaski National Monument in 2019. Data were stratified across two dominant broadly defined habitats within the park (Maritime Tidal Wetlands and Maritime Upland Forests and Shrublands). Noteworthy findings include: Sixty-six vascular plant taxa were observed across 12 vegetation plots, including six taxa not previously known from the park. Plots were located on both Cockspur and McQueen’s Island. The most frequently encountered species in each broadly defined habitat included: Maritime Tidal Wetlands: smooth cordgrass (Spartina alterniflora), perennial saltmarsh aster(Symphyotrichum enuifolium), and groundsel tree (Baccharis halimifolia) Maritime Upland Forests and Shrublands: yaupon (Ilex vomitoria), southern/eastern red cedar (Juniperus silicicola + virginiana), and cabbage palmetto (Sabal palmetto). Four non-native species identified as invasive by the Georgia Exotic Pest Plant Council (GA-EPPC 2018) were found during this monitoring effort. These species (and their overall frequency of occurrence within all plots) included: Japanese honeysuckle (Lonicera japonica; 17%), bahiagrass (Paspalum notatum; 8%), Vasey’s grass (Paspalum urvillei; 8%), and European common reed (Phragmites australis; 8%). Two rare plants tracked by the Georgia Department of Natural Resources (GADNR 2013) were found during this monitoring effort. These include Florida wild privet (Forestiera segregata) and Bosc’s bluet (Oldenlandia boscii). Southern/eastern red cedar and cabbage palmetto were the most dominant species within the tree stratum of the maritime Upland Forest and Shrubland habitat type. Species that dominated the sapling and seedling strata of this type included yaupon, cabbage palmetto, groundsel tree, and Carolina laurel cherry (Prunus caroliniana). The health status of sugarberry (Celtis laevigata)—a typical canopy species in maritime forests of the South Atlantic Coastal Plain--observed on park plots appeared to be in decline, with most stems experiencing elevated levels of dieback and low vigor. Over the past decade, this species has been experiencing unexplained high rates of dieback and mortality throughout its range in the Southeastern United States; current research is focusing on what may be causing these alarming die-off patterns. Duff and litter made up the majority of downed woody biomass (fuel loads) across FOPU vegetation plots.
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Johnson, Sarah, Michael Sinclair, Emily Leonard, and Forrest Rosenbower. Development of strategies for monitoring and managing sandscape vegetation, with an assessment of declining vegetation in the Apostle Islands National Lakeshore. National Park Service, April 2022. http://dx.doi.org/10.36967/nrr-2293187.

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Coastal dune habitats such as those of the Apostle Islands National Lakeshore (APIS) are regionally rare habitats of global and state-wide concern. Their dynamic, sandy landforms provide habitat for unique species specifically adapted to frequent disturbance, drought, and other stresses. Despite having disturbance-driven life histories, these species are at risk due to increased visitor use of sandscape habitats and environmental change. Resource managers at APIS have long understood the values of these sandscapes and threats presented by recreational trampling, but more recently they have recognized the precarious position that these coastal habitats are in due to their proximity to the lake and exposure to weather-related phenomena linked with long-term climate change. In recognition of emerging threats and the need to track impacts of these threats, park managers initiated a revision of their methods for monitoring sandscape vegetation. We applied these methods to 15 sandscape locations within the national lakeshore in 2014. Here, we outline what these revisions to the methods were, assess the current status of sandscape structure and composition, assess the utility of data collected with these methods, provide suggestions for further revisions of the sampling method, outline a two-tiered sampling approach for future monitoring, and we provide management recommendations. In a second section of the report, we provide a focused assessment of the size and health of Juniperus communis (common juniper), a target species of concern in these sandscape communities after it was observed by park managers to be dying or stressed on Michigan Island. Our assessments include the status of J. communis across all sandscapes monitored in 2014, and an analysis of change over time since 2012 in the health of J. communis on Michigan, Outer, and Stockton Islands. We provide evidence of impacts by rodents on foliar dieback, primarily on Michigan Island, and we discuss possible interactions with the non-native pale juniper web-worm (Aethes rutilana) and with climate change.
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Johnson, Sarah, Michael Sinclair, Emily Leonard, and Forrest Rosenbower. Development of strategies for monitoring and managing sandscape vegetation, with an assessment of declining vegetation in the Apostle Islands National Lakeshore. National Park Service, April 2022. http://dx.doi.org/10.36967/nrr-2293187.

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Coastal dune habitats such as those of the Apostle Islands National Lakeshore (APIS) are regionally rare habitats of global and state-wide concern. Their dynamic, sandy landforms provide habitat for unique species specifically adapted to frequent disturbance, drought, and other stresses. Despite having disturbance-driven life histories, these species are at risk due to increased visitor use of sandscape habitats and environmental change. Resource managers at APIS have long understood the values of these sandscapes and threats presented by recreational trampling, but more recently they have recognized the precarious position that these coastal habitats are in due to their proximity to the lake and exposure to weather-related phenomena linked with long-term climate change. In recognition of emerging threats and the need to track impacts of these threats, park managers initiated a revision of their methods for monitoring sandscape vegetation. We applied these methods to 15 sandscape locations within the national lakeshore in 2014. Here, we outline what these revisions to the methods were, assess the current status of sandscape structure and composition, assess the utility of data collected with these methods, provide suggestions for further revisions of the sampling method, outline a two-tiered sampling approach for future monitoring, and we provide management recommendations. In a second section of the report, we provide a focused assessment of the size and health of Juniperus communis (common juniper), a target species of concern in these sandscape communities after it was observed by park managers to be dying or stressed on Michigan Island. Our assessments include the status of J. communis across all sandscapes monitored in 2014, and an analysis of change over time since 2012 in the health of J. communis on Michigan, Outer, and Stockton Islands. We provide evidence of impacts by rodents on foliar dieback, primarily on Michigan Island, and we discuss possible interactions with the non-native pale juniper web-worm (Aethes rutilana) and with climate change.
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Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Timucuan Ecological and Historic Preserve: 2019 data summary—Version 2.0. National Park Service, February 2022. http://dx.doi.org/10.36967/nrds-2290196.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and it is currently conducted on 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort on four SECN parks, including Timucuan Ecological and Historic Preserve (TIMU). A total of 23 vegetation plots were established in the park in May and June. Data collected in each plot include species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches (in)]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Timucuan Ecological and Historic Preserve in 2019. Data were stratified across three dominant broadly defined habitats within the park (Coastal Plain Nonalluvial Wetlands, Coastal Plain Open Uplands and Woodlands, and Maritime Upland Forests and Shrublands) and three land parcels (Cedar Point, Theodore Roosevelt, and Thomas Creek). Noteworthy findings include: A total of 157 vascular plant taxa (species or lower) were observed across 23 vegetation plots, including nine species not previously known from the park. Three plots were located in the footprint of the Yellow Bluff Fire, and were sampled only two weeks following the fire event. Muscadine (Muscadinia rotundifolia), cat greenbrier (Smilax glauca), water oak (Quercus nigra), and swamp tupelo (Nyssa biflora) were the most frequently encountered species in Coastal Plain Nonalluvial Wetland habitat; saw palmetto (Serenoa repens), slash pine (Pinus elliottii), and gallberry (Ilex glabra) were the most frequently encountered species in Coastal Plain Open Upland and Woodland habitat; and Darlington oak (Quercus hemisphaerica), Spanish moss (Tillandsia usenoides), and red bay (Persea borbonia) were the most frequently encountered species in Maritime Upland Forests and Shrublands. There were no exotic species of the Florida Exotic Pest Plant Council list of invasive plants (FLEPPC 2020) observed on any of these plots. Both red bay and swamp bay (Persea palustris) were largely absent from the tree stratum in these plots; however, they were present (occasionally in high abundance) in the seedling and sapling strata across all habitat types. Buckthorn bully (Sideroxylon lycioides)—listed as Endangered in the state of Florida by the Florida Department of Agriculture and Consumer Services (FDACS 2020)—was observed in three Maritime Upland Forest and Shrubland plots. The tree strata in each broadly defined habitat were dominated by the following species: Coastal Plain Nonalluvial Wetlands-loblolly bay (Gordonia lasianthus) Coastal Plain Open Uplands and Woodlands-longleaf pine (Pinus palustris) Maritime Upland Forests and Shrublands-oaks (Quercus sp.) Most stems within the tree strata exhibited healthy vigor and only moderate dieback across all habitat types. However, there was a large amount of standing dead trees in plots within Maritime Upland Forests and Shrublands. Downed woody biomass (fuel loads) were highest in the Cedar Point and Thomas Creek land parcels.
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Boyle, M., and Elizabeth Rico. Terrestrial vegetation monitoring at Fort Matanzas National Monument: 2019 data summary. National Park Service, May 2022. http://dx.doi.org/10.36967/nrds-2293409.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and it is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort at four SECN parks, including Fort Matanzas National Monument (FOMA). Nine vegetation plots, located on Anastasia and Rattlesnake Islands, were established at Fort Matanzas National Monument in June. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Fort Matanzas National Monument in 2019. Data were stratified across two dominant broadly defined habitats within the park (Maritime Upland Forests/Shrublands and Maritime Open Uplands). Noteworthy findings include: Eighty-two vascular plant taxa (species or lower) were observed across nine vegetation plots, including eight species not previously documented within the park. The most frequently encountered species in each broadly defined habitat included: Maritime Upland Forests and Shrublands: saw palmetto (Serenoa repens), yaupon (Ilex vomitoria), southern/eastern red cedar (Juniperus silicicola + virginiana), American beautyberry (Callicarpa americana), and American burnweed (Erectites hieraciifolius). Maritime Open Uplands: sea oats (Uniola paniculata), earleaf greenbriar (Smilax auriculata), and dixie sandmat (Euphorbia bombensis). ne non-native species, Brazilian pepper (Schinus terebinthifolia), categorized as invasive by the Florida Exotic Pest Plant Council (FLEPPC 2019) was encountered in one Maritime Upland Forest and Shrubland plot during this monitoring effort. There were not any rare plants tracked by the Florida Department of Agriculture and Consumer Services (FDACS 2020) found during this monitoring effort. All plants located in these monitoring plots are fairly common throughout Florida, as well as across the Southeast Coast. Three species observed, however, are on the FDACS 2020 list of commercially exploited plants within the state. These include saw palmetto, cinnamon fern (Osmundastrum cinnamomeum), and coontie (Zamia integrifolia var. umbrosa). Southern/eastern red cedar and cabbage palmetto (Sabal palmetto) were the most dominant species within the tree stratum of the Maritime Upland Forest and Shrubland habitat type. Species that dominated the sapling and seedling strata of this type included yaupon and cabbage palmetto. More than 75% of the trees measured in the parks Maritime Upland Forest and Shrubland habitat type were alive and experiencing healthy vigor. Of the 22 trees that were dead, more than 50% of those were southern/eastern red cedar. Most of those individuals that were observed with moderate or severe decline and greater than 50% dieback were southern/eastern red cedars. Although red bay (Persea borbonia) was identified as one of the “principal understory tree” species within Fort Matanzas National Monument’s maritime forests in 2004 (Zomlefer et al. 2004), tree-sized individuals were rarely detected on plots during this monitoring effort. This may be in part due to the detection of laurel wilt disease within St. Johns County in 2006 (USDA 2021). Based on the low detection...
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