Bibliografie tematiche / Seed bank

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Letteratura scientifica selezionata sul tema "Seed bank"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 26 gennaio 2023

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Articoli di riviste sul tema "Seed bank"

1

Leon, Ramon G., e Micheal D. K. Owen. "Artificial and natural seed banks differ in seedling emergence patterns". Weed Science 52, n. 4 (agosto 2004): 531–37. http://dx.doi.org/10.1614/ws-03-048r2.

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Artificial weed seed banks are practical for studying seed bank depletion and weed seedling emergence because the number, depth, and species composition of seed banks can be managed. However, no studies have determined whether artificial seed banks are representative of natural seed banks. We compared the emergence of velvetleaf, giant foxtail, and common waterhemp in a natural seed bank, an artificial seed bank with stratified seeds, and an artificial seed bank with nonstratified seeds. Velvetleaf seedling emergence was higher in the nonstratified seed bank in 2001, but no differences were observed in 2002. The number of viable velvetleaf seeds at the end of the experiment was lower in the natural seed bank than in the artificial seed banks in 2002. Velvetleaf emergence occurred earlier in the natural seed bank than in the artificial seed banks. Giant foxtail emergence was higher in the artificial seed banks (58 to 82%) than in the natural seed bank (5 to 23%). Common waterhemp emergence ranged from 7 to 65% in the artificial seed banks and from 1 to 5% in the natural seed bank. In general, the distribution of emergence with time differed in the natural seed bank compared with the artificial seed banks. These differences were attributed to differences in soil temperature and soil bulk density between the natural and artificial seed banks. Artificial seed banks showed lower soil bulk density and greater temperature fluctuation than the natural seed bank. However, there was no consistent relationship between growing degree days and emergence timing in the three treatments for any of the species studied.
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2

Joshi, Bal Krishna. "Indigenous Seeds, Seed Selection and Seed Bank for Sustainable Agriculture". Grassroots Journal of Natural Resources 04, n. 04 (30 dicembre 2021): 13–26. http://dx.doi.org/10.33002/nr2581.6853.040402.

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Indigenous seeds are grown by the farmers over the years with a strong influence from local natural factors. Such seeds have a higher level of intrapopulation variations and the capacity of buffering the adverse factors. Understanding indigenous seeds along with their diversity are useful to diversify their uses, to assess conservation status, to know the factors making farming areas red zone, and to improve their performance. Selection is the simplest and most common method for the improvement of crop varieties. The variation must be created and maintained to impose selection. Different types of selection can be considered depending on the mode of reproduction of crops. Response to selection and correlated response are estimated to make the selection process more effective. Many different selection approaches can target either developing monomorphic or polymorphic varieties. There are five selection units and can be applied in five crop stages. Farmers’ criteria need to be considered during selection process. Based on the genotypic classes, there are three types of selection namely stabilizing selection, directional selection, and disruptive selection. The most simple and common selection methods are pure lines, mass selection, and class-bulking selection. Orthodox seeds in short, medium, and long-term storage facilities are conserved as a seed bank. Major types are household seed banks, community seed banks, national seeds, natural seed banks, and global seed banks. A seed bank is for assuring the availability of crop diversity for research, study, and production. The common works in seed banks are diversity collection, regeneration, characterization, multiplication, and distribution along with online database management.
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3

Caballero, I., J. M. Olano, A. L. Luzuriaga e A. Escudero. "Spatial coherence between seasonal seed banks in a semi-arid gypsum community: density changes but structure does not". Seed Science Research 15, n. 2 (giugno 2005): 153–60. http://dx.doi.org/10.1079/ssr2005206.

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Seed banks play a crucial role in arid plant communities because they confer stability and long-term persistence. However, seed banks have high temporal and spatial variability, with dramatic changes in density and composition. The aim of this study was to test whether seasonal change affected seed bank community structure and spatial pattern. Moreover, we wanted to know if the effect driven by environmental factors on the seed bank was constant year round. We sampled the seed bank at 188 points along seven parallel transects through a gypsum system in central Spain. Soil samples were taken twice (September and April) in contiguous plots. In each plot we measured environmental parameters, including micro- and macroslope, vegetation band, shrub cover, lichen crust cover and landform. A nearly threefold decrease in seed bank density occurred between September (16,230 seeds m–2) and April (5960 seeds m–2). Seasonal changes in density varied widely among species; however, a seed bank was present for most species at both sampling dates. For several well-studied species (Lepidium subulatum and Helianthemum squamatum), seed losses were within the range of losses by emergence reported in the literature. In both seasons, seed bank composition was controlled mainly by community band and microslope. Sampling season had a significant, but minor effect on seed bank composition. Moreover, a high spatial correlation existed in terms of seed density and richness through the two studied seasons. These results show that the seed bank keeps a constant structure even under substantial variation in density.
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Hulme, P. E. "Post-dispersal seed predation and seed bank persistence". Seed Science Research 8, n. 4 (dicembre 1998): 513–19. http://dx.doi.org/10.1017/s0960258500004487.

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AbstractThis study examines whether post-dispersal seed predators could be an important selective force in determining the seed bank strategies of grassland plants. It tests the hypothesis that species with persistent seed banks should sustain proportionally less predation of buried seeds than species which have transient seed banks and that this should be true irrespective of seed size. Results are drawn from a field experiment examining the relative susceptibility of surface versus buried seeds for 19 herbaceous taxa exhibiting different degrees of seed bank persistence. The data were consistent with the hypothesis that seed predators (rodents) influence the seed bank characteristics of seeds. Rodents removed proportionally more large seeds than small seeds and removed a smaller proportion of seeds with persistent rather than transient seed banks, independently of seed size. On average, burial reduced seed removal by almost 50%. The decrease in rates of seed removal following burial was marked for seeds with persistent seed banks but negligible for seeds with transient seed banks. Herbaceous plants with relatively large seeds (seed mass > 1 mg) that form persistent seed banks were either completely avoided or only consumed in small quantities by rodents. In contrast, large-seeded species with transient seed banks suffer high rates of seed predation. Models of life-history evolution predict trade-offs between seed dormancy and seed mass since dormancy and seed size are correlated traits that both reduce risk in variable environments and thus will show patterns of negative covariation. This paper presents an alternative explanation for this trade-off based on experimental evidence of a negative relationship between seed bank persistence and predation risk.
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Warr, Susan J., Ken Thompson e Martin Kent. "Seed banks as a neglected area of biogeographic research: a review of literature and sampling techniques". Progress in Physical Geography: Earth and Environment 17, n. 3 (settembre 1993): 329–47. http://dx.doi.org/10.1177/030913339301700303.

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The article highlights a comparatively neglected area of biogeographical research - seed banks and the distribution of seeds in the soil. The article reviews some of the relevant literature on seed banks and the methods for their study. Attention is focused on aspects of seed banks of particular relevance to biogeographers, with detailed examples drawn from seed bank studies in both temperate and tropical environments. In the review of the seed bank literature, the topics covered include the seed banks of successional communities and the size of seed banks in different vegetation types. The species composition of seed banks in different plant communities is discussed, particularly the degree of correlation between the species composition of seed banks and associated ground flora. The relationships between seed persistence, depth of burial in the soil and soil properties, such as moisture and pH, are explored. Seed bank heterogeneity is examined and a number of studies which have attempted to describe and measure the spatial variability of seed banks are summarized. Ways of classifying seed banks in terms of seed bank strategies are explained. The role of seed banks in conservation is discussed, for example in restoration projects, where preferred species have been lost from the vegetation but survive in the seed bank. The relevance of seed banks for the conservation of rare species and in landscape management is considered. Lastly, the contribution of seed banks to the recovery of vegetation following disturbance in various plant communities is discussed. In the review of seed bank sampling techniques, the subjects considered include methods of sample collection, the sampling intensity required for reliable estimates of seed density, a consideration of the relative merits of random and systematic sample distribution, as well as the importance of the timing of sampling. Various methods for the estimation of seed numbers in samples are appraised; these either involve extraction of seeds from the soil, followed by seed identification or enumeration by germination and seedling identification. Problems of analysing seed bank data are considered and several useful techniques for data analysis are suggested. Finally, the article draws attention to areas of future seed bank research for biogeographers and plant ecologists.
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6

Hossain, MM, e M. Begum. "Soil weed seed bank: Importance and management for sustainable crop production- A Review". Journal of the Bangladesh Agricultural University 13, n. 2 (20 luglio 2016): 221–28. http://dx.doi.org/10.3329/jbau.v13i2.28783.

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The seed bank is the resting place of weed seeds and is an important component of the life cycle of weeds. Seed banks are the sole source of future weed populations of the weed species both annuals and perennials that reproduce only by seeds. For this reason, understanding fate of seeds in the seed bank can be an important component of overall weed control. When weed seeds enter the seed bank, several factors influence the duration for which seeds persist. Seeds can sense the surrounding environment in the seed bank and use these stimuli to become dormant or initiate germination. Soil and crop management practices can directly influence the environment of seeds in the soil weed seed bank and can thus be used to manage seed longevity and germination behavior of weed seeds.J. Bangladesh Agril. Univ. 13(2): 221-228, December 2015
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Butler, Jack, e Kara Paintner. "Rangeland Recovery Potential: Soil Seed Content and Seed Viability". UW National Parks Service Research Station Annual Reports 14 (1 gennaio 1990): 63–65. http://dx.doi.org/10.13001/uwnpsrc.1990.2879.

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Abstract (sommario):
In most plant communities, soil contains a seed bank (population of dormant seeds), (Harper 1977), which provides a partial record of past and present vegetation (Major and Pyott 1966, Johnson and Anderson 1986). Seed banks are continuously rejuvenated by a "seed rain", from vegetation located on- and off-site. If existing communities are disturbed or destroyed, the seed bank provides a potential source of propagules during succession (Egler 1954, Connell and Slatyer 1977). Consequently, seed banks may serve as an index in predicting what vegetation changes might occur if environmental conditions are favorable for germination (Harper 1977). The objectives of this study are to 1. evaluate the viable seed bank within grazed and relict pinyon-juniper and blackbrush/Indian ricegrass communities in Glen Canyon National Recreation Area (GCNRA), 2. assess the ability of these communities to recover following a disturbance, using their respective seed banks as indicators of recovery potential, and 3. address the suitability of using seed banks to monitor and predict community level composition changes in response to various intensities of grazing.
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Salazar, Ana, Guillermo Goldstein, Augusto C. Franco e Fernando Miralles-Wilhelm. "Timing of seed dispersal and dormancy, rather than persistent soil seed-banks, control seedling recruitment of woody plants in Neotropical savannas". Seed Science Research 21, n. 2 (13 gennaio 2011): 103–16. http://dx.doi.org/10.1017/s0960258510000413.

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AbstractA large fraction of tree species forming persistent soil seed-banks and with dormant seeds are expected to be found in strongly seasonal ecosystems such as Neotropical savannas, where seedling recruitment could be highly variable. In the savannas of Central Brazil, we studied seed characteristics (type of dormancy, longevity and moisture content) of 14 representative woody species differing in seed dispersal season. We also studied the dynamics of soil seed-banks and similarity patterns in woody species composition among seed rain, soil seed-bank, seedling bank and standing vegetation along shallow topographic gradients that differ in canopy cover. Woody species composition of the soil seed-bank largely differed from the standing vegetation, the seed rain and the seedling bank species composition, suggesting low recruitment of woody species from the soil seed-bank. Seeds of the 14 woody species remained viable for less than 16 months in laboratory dry-storage conditions. Of those, most seeds dispersed in the dry season were dormant and exhibited low moisture content, while most seeds dispersed in the wet season were non-dormant and exhibited high moisture content. Longevity of these seeds dispersed in the dry and the wet seasons did not differ significantly. This study shows that both timing of seed dispersal and dormancy appear to control timing of seed germination and seedling recruitment of most Neotropical savanna woody species, which did not form persistent soil seed-banks. This study contributes to the understanding of tree/grass coexistence and tree density variations along topographic gradients in tropical savannas.
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Landenberger, Rick E., e James B. McGraw. "Seed-bank characteristics in mixed-mesophytic forest clearcuts and edges: Does "edge effect" extend to the seed bank?" Canadian Journal of Botany 82, n. 7 (1 luglio 2004): 992–1000. http://dx.doi.org/10.1139/b04-080.

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Little is known about the seed banks of mixed-mesophytic forest clearcuts or their associated forest edges. Seed banks were described and compared to better understand how seed density, species richness, and composition change with increasing distance from clearcuts. Thirty-two taxa were found in the seed bank of clearcuts, and 44 were found in adjacent forest edges. Annuals represented 41% of seeds in clearcuts, but only 8% in edges, while trees and shrubs represented 3% in both areas. Seed-bank density and species richness varied significantly within and between clearcuts, but clearcuts were no different in seed-bank density and richness from interior forest seed banks. Seed-bank density declined significantly with distance from clearcuts on west-facing forest edges, but demonstrated no discernable spatial pattern on south-facing edges. Overall, edge effects from clearcutting on adjacent forest seed banks were demonstrated in total seed density and in several common wind-dispersed, early-successional herbaceous species, including Erechtites hieraciifolia (L.) Raf. and Lobelia inflata L., and Vitis, a common ingestion-dispersed species. The seed-shadow edge effect may influence both current and future community characteristics and population dynamics of vegetation in mixed-mesophytic forest edges adjacent to clearcuts.Key words: seed banks, clearcutting, edge effects, mixed-mesophytic forest, West Virginia.
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Ebersole, James J. "Role of the seed bank in providing colonizers on a tundra disturbance in Alaska". Canadian Journal of Botany 67, n. 2 (1 febbraio 1989): 466–71. http://dx.doi.org/10.1139/b89-065.

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Numbers of germinable seeds in soils from four undisturbed communities at an Alaskan Arctic Coastal Plain site ranged from 70 to 600 m−2 and numbers of distinct taxa were two to nine. Stratified soils contained more germinable taxa than unstratified soils, suggesting that seed banks in Alaskan tundra are more diverse than shown by earlier studies using unstratified soils. In contrast to temperate seed banks, which often contain early successional species no longer present in the vegetation, all seed bank taxa at this site occur within a short distance of the sample sites because of long persistence of the communities. Of the common colonizers on a nearby 30-year-old disturbance, Betula nana, Poa arctica, Salix spp., and Arctagrostis latifolia are absent or present in only small amounts in the seed bank and apparently colonize mainly from seeds dispersed following disturbance. Eriophorum angustifolium, another common colonizer, is present in the seed bank of wet areas and Carex bigelowii and C. aquatilis are abundant in the seed bank of several communities. Germination from the seed bank is an important means of colonizing disturbances for these taxa. No trend in seed bank size with intensity of disturbance (cryoturbation) was found, and comparison with other studies shows that seed bank size in Eriophorum vaginatum tussock tundra decreases with latitude.
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Più fonti

Tesi sul tema "Seed bank"

1

Tolley, Rebecca. "Seed Bank". Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/5660.

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Book Summary:Issues: Understanding Controversy and Society brings important issues in today's world to students' attention, highlighting the complete historical background, contemporary status, and global view of each. It provides students authoritative context, diverse expert perspectives, and carefully selected primary and secondary sources for truly understanding the issues that currently affect much of our global society, and for developing informed positions on those engendering controversy.
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2

Tolley, Rebecca. "Seed Banks". Digital Commons @ East Tennessee State University, 2007. https://www.amzn.com/031333725X.

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Book Summary: The business of food and drink is for better and worse the business of our nation and our planet, and to most consumers how it works remains largely a mystery. This encyclopedia takes readers as consumers behind the scenes of the food and drink industries. The contributors come from a wide range of fields, and the scope of this encyclopedia is broad, covering from food companies and brands to the environment, health, science and technology, culture, finance, and more. The more than 150 essay entries also cover those issues that have been and continue to be of perennial importance. Historical context is emphasized and the focus is mainly on business in the United States. Most entries include Further Reading. The frontmatter includes an Alphabetical List of Entries and a Topical List of Entries to allow the reader to quickly find subjects of interest. Numerous cross-references in the entries and blind entries provide other search strategies. The person and subject index is another in-depth search tool.
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3

Yehnjong, Petra Seka. "Paleozoic Seed Bank and Their Ecological Significance". Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2316.

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Soil seed banks are a reservoir of viable seeds present in the soil in plant communities. They have been studied and characterized in various ways in different habitats. However, these studies are limited to modern seed banks. This study extends seed bank studies to the Paleozoic Era. It was hypothesized that size distribution and seed density in Paleozoic seed banks exhibit similar patterns as in modern seed banks. Seed sizes and seed density of fossil seed from Wise Virginia were estimated. Modern seed bank information was obtained from published data. Data were analyzed using one-way ANOVA and Kruskal-Wallis test. The Paleozoic size distribution was predominated by larger seeds and the estimated seed density of 19 200 seeds m-3 falls within the range of modern seed banks but at a higher end of modern seed bank densities. During the Paleozoic they were sufficient to insure regeneration of these economically important forests.
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Kellerman, Millicent Johanna Susanna. "Seed bank dynamics of selected vegetation types in Maputaland, South Africa". Diss., Connect to this title online, 2004. http://upetd.up.ac.za/thesis/available/etd-02012005-090837.

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Cooper, Cara A. "Melinis repens Seed Bank Longevity in Miami-Dade County". FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/677.

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The main objective of this research was to determine the seed bank longevity of Melinis repens at two Southern Florida sites. Seeds were divided among different exposure levels (shade versus sun) and depths (surface versus buried) and tested for baseline viability using 2,3,5-Triphenyl-tetrazolium chloride. Statistical analysis determined that at the pine rockland site there was a significant interaction between time, exposure, and depth. The initial mean viability at this site declined from 49.71% to 11.26% and 13.06% for sun/buried seeds and sun/surface seeds, respectively, by month 8. The mean viability of shade/surface seeds and shade/buried seeds declined to 24.56% and 22.06% after 8 months. There were no significant effects in the Florida scrub. In order for land managers to completely remove this species from a site, treatment with herbicide will need to continue for a minimum of one year to effectively kill all viable seeds in the seed bank.
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Martin, Anna. "Mathematical modeling of seed bank dynamics in population genetics". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-321191.

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We study the genealogical structure of samples from a population for which any givengeneration is made up of direct descendants from one randomly chosen previousgeneration. These occur in nature when there are seed banks or egg banks allowingan individual to leave offspring several generations in the future. Kaj et al. studied in2001 the case where any given generation is made up of descendants from severalprevious generations and showed how this temporal structure in the reproductionmechanism causes a decrease in the coalescence rate. In this project we will showthat having all samples pick their parents in one randomly chosen generation will leadto a coalescent process which is equivalent to a time shifted version of Kingman’scoalescent, time shifted with the age distribution of the seed bank.
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Davis, Jessica. "Soil seed bank dynamics in Mediterranean urban vegetation fragments". Thesis, Davis, Jessica (2012) Soil seed bank dynamics in Mediterranean urban vegetation fragments. Masters by Coursework thesis, Murdoch University, 2012. https://researchrepository.murdoch.edu.au/id/eprint/12926/.

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Conservation of biodiversity in urban vegetation fragments is of increasingly high importance with growing urbanisation globally, particularly so in the biodiversity hotspot of the Mediterranean southwest of Western Australia. Relationships between fragmentation (connectivity, fragment size, time since isolation) and urban disturbances (weed invasion, human disturbance, rubbish) relative to the soil seed bank of a representative sample of Perth’s urban woodland fragments (N=36) were examined. In total, 182 seedling types comprising 57 invasive, 105 native and 20 unknowns were identified. Approximately 65% of the 21,770 seedlings counted were native, 33% invasive and 2% unidentified. The average soil seed bank seedling density was 2,787 germinates per m2. Community analysis (ordination) showed that the soil seed bank composition correlated with fragment age. Subsequent quantitative analysis (linear regression) did not find evidence for species or functional trait groups being vulnerable to decline due to isolation or fragment age, indicating that species extinction is not evident within Perth’s urban fragments. More invasive annual herbs were found within older fragments and the soil seed banks of smaller fragments were found to have lower native species abundance compared to larger fragments. A positive relationship was found between the number of footpaths within a fragment and the abundance of annual invasive herbs within the soil seed bank. High weed cover in a fragment resulted in high weed presence within the soil seed bank. It was also found that high weed cover did not necessarily indicate low native species diversity or abundance within the soil seed bank, suggesting caution in using weed cover to classify sites as suitable/unsuitable for topsoil transfer in restoration activities. The soil seed bank of the study sites contained a diverse range of native species, indicating that topsoil from these areas may be useful in restoration of degraded sites.
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Passos, Isabel Maria Melo Mendes. "Importance of seed bank for the management of invasive Acacia dealbata". Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13375.

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Mestrado em Ecologia Aplicada
The management of invasive plants is a hard task, which may be further hampered by the existence of extensive and long-lived seed banks. Acacia dealbata is an Australian tree considered one of the most aggressive invasive plant species in Portugal; the species is known to produce a persistent seed bank, but its extension and viability hasn’t been explored. In this work we aim to characterize the seed bank of A. dealbata, namely its extension, germinability and viability, in order to contribute to the management of the species, but also increase knowledge about its ecology. The extension of the seed bank was assessed by collecting soil samples in invaded stands and adjacent areas and counting the seeds. These were then germinated at 25ºC and some were exposed to an initial temperature of 60ºC, aiming to assess the effect of extreme soil temperature in dormancy breaking. Results showed that beneath canopy the seed bank averaged 4 608 seed/m2 (± 820), but maximum values can reach 62 747 seeds/m2. In areas adjacent to the invaded stands a mean value of 9 seeds/m2 (± 5) was found, with maximum values of 632 seeds/m2. Although only 8,6% of the seeds germinated without any stimulus, in total 89,7% of the seeds found showed to be viable after scarification, with 81% of the seeds remaining dormant in the soil. Of the seeds exposed to 60ºC almost 64% germinated without any physical stimulation, suggesting that extreme soil temperatures, reached in hot days, may break seed dormancy. Multivariate analysis showed that the probability of accumulating high numbers of seeds in soil decreases with higher stoniness and root density, and increases with higher A. dealbata density and with fewer fire events. Our results show that the soil seed bank of A. dealbata is numerous and viable, suggesting that risk of reinvasion after plant removal is very high. It was also shown that the species has the ability to disperse seed beyond invaded stands Although frequently disregarded, this study alerts for the need to include extensive and long-lived seed banks in the management of invasive plants, since these hidden legacies may quickly hamper control efforts. Alternatives to deal with such seed banks are discussed.
O controlo de plantas invasoras é uma tarefa árdua, dificultada pela existência de bancos de sementes extensos e com longa viabilidade. A espécie Acacia dealbata é uma árvore nativa da Austrália, considerada como uma das espécies invasoras mais agressivas em Portugal. Sabe-se que o seu banco de sementes permanece viável no solo por muitos anos, no entanto a sua extensão e a viabilidade das sementes não são ainda conhecidos. O presente trabalho tem como objetivo caracterizar esse banco de sementes, a sua extensão, viabilidade e germinabilidade, de forma a contribuir para a sua gestão e para o conhecimento geral sobre a ecologia da espécie. A extensão do banco de sementes foi avaliada através da recolha de amostras de solo em áreas invadidas e zonas adjacentes não invadidas, realizando-se depois a contagem das sementes. Depois de contabilizadas, as sementes foram postas a germinar a 25ºC, sendo que uma parte foi exposta a uma temperatura inicial de 60ºC, com o objetivo de perceber se temperaturas extremas no solo podem quebrar a dormência das sementes. Os resultados indicam que nas áreas invadidas o banco de sementes tem uma densidade média de 4 608 sementes/m2 (± 820), sendo que os valores máximos observados foram de 62 747 sementes/m2. Nas áreas adjacentes observaram-se em média 9 sementes/m2 (± 5), com um valor máximo de 632 sementes/m2. Apesar de apenas 8,6% das sementes terem germinado sem qualquer estímulo, 89,7% do banco de sementes germinou após a escarificação das sementes, indicando que 81% das sementes armazenadas no solo se encontram dormentes. Das sementes inicialmente expostas a 60ºC, cerca de 64% germinaram sem escarificação, sugerindo que a ocorrência de temperaturas anormalmente altas pode estimular a germinação. De acordo com a análise estatística efetuada a probabilidade o número de sementes acumuladas no solo diminui com o aumento de pedregosidade e com a densidade de raízes; por outro lado, o banco de sementes aumenta com densidade de A. dealbata e em áreas sujeitas a menos incêndios. Os resultados obtidos demonstram a elevada viabilidade e densidade do banco de sementes de A.dealbata, evidenciando o elevado risco de reinvasão de áreas onde se realizam ações de controlo da espécie. Este estudo alerta para a necessidade de incluir a gestão do banco de sementes nos planos de controlo de espécies invasoras,alertando para o facto de a espécie ser capaz de dispersar sementes atém das áreas invadidas. Estas características transformam o banco de sementes numa herança escondida, que pode dificultar as ações de controlo. São discutidos diferentes métodos possíveis para lidar com bancos de sementes.
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9

Goodson, Joanne Marie. "Environmental controls on the colonisation and establishment of vegetation on river banks under varying grazing pressure". Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289259.

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10

Auffret, Alistair G., e Sara A. O. Cousins. "Past and present management influences the seed bank and seed rain in a rural landscape mosaic". Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-69879.

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1. Seed bank and seed rain represent dispersal in time and space. They can be important sources of diversity in the rural landscape, where fragmented habitats are linked by their histories. 2. Seed bank, seed rain and above-ground vegetation were sampled in four habitat types (abandoned semi-natural grassland (ABA), grazed former arable field (FAF), mid-field islet (MFI) and grazed semi-natural grassland (SNG)) in a rural landscape in southern Sweden, to examine whether community patterns can be distinguished at large spatial scales and whether seed bank and seed rain are best explained by current, past or intended future vegetation communities. 3. We counted 54 357 seedlings of 188 species from 1190 seed bank and 797 seed rain samples. Seed bank, seed rain and above-ground vegetation communities differed according to habitat. Several species characteristic of managed grassland vegetation were present in the seed bank, seed rain and vegetation of the other habitats. 4. The seed banks of SNGs and the seed rain of the FAFs were generally better predicted by the surrounding above-ground vegetation than were the other habitat types. The seed rain of the grazed communities was most similar to the vegetation in the FAFs, while the seed banks of the abandoned grasslands most resembled the vegetation in SNGs. 5. Gap availability and seed input could be limiting the colonisation of target species in FAFs, while remnant populations in the seed bank and the presence of grassland specialists in the above-ground vegetation indicate that abandoned grasslands and mid-field islets could be valuable sources of future diversity in the landscape after restoration. 6. Synthesis and applications. SNG communities are able to form seed banks which survive land-use change, but their seed rain does not reflect their above-ground communities. It is important that grassland plants set seed. By connecting existing grasslands with restoration targets, increased disturbance in the target habitats would allow for colonisation via the seed bank or seed rain, while decreased grazing intensity would benefit seed production in the source grasslands. Otherwise, landscape-wide propagule availability might increase with a more varied timing and intensity of management.
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Libri sul tema "Seed bank"

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illustrator, Beavers Ethen, Kane Bob creator e DC Comics Inc, a cura di. Seed bank heist. North Mankato, Minnesota: Stone Arch Books, a Capstone imprint, 2015.

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illustrator, Beavers Ethen, a cura di. Seed bank heist. London: Curious Fox, 2015.

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Banking on seeds, community seed bank network. Bangalore: Green Foundation, 2005.

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Mukhopadhyay, Kasturi. The SAARC Regional Seed Bank: A case study for India. Jaipur: CUTS International, 2013.

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Baumeister, Dayna. Biomimicry resource handbook: A seed bank of best practices. Missola, MT: Biomimicry 3.8, 2013.

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Schuler, Thomas M. Seed bank response to prescribed fire in the central Appalachians. Newtown Square, PA: United States Dept. of Agriculture, Forest Service, Northern Research Station, 2010.

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Petrov, Vladimir Vladimirovich. Bank semi͡a︡n v pochvakh lesnykh fitot͡s︡enozov evropeĭskoĭ chasti SSSR. Moskva: Izd-vo Moskovskogo universiteta, 1989.

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F, Franklin Jerry, e Pacific Northwest Research Station (Portland, Or.), a cura di. Seed rain and seed bank of third- and fifth-order streams on the western slope of the Cascade Range. Portland, OR (333 S.W. First Avenue, P.O. Box 3890, Portland 97208-3890): U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1995.

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Whigham, D. F. Vegetation in wetlands receiving sewage effluent: The importance of the seed bank. S.l: s.n, 1985.

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Pederson, R. L. Implications of wetland seed bank research: A review of Great Basin and Prairie Marsh studies. S.l: s.n, 1988.

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Capitoli di libri sul tema "Seed bank"

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Bakker, Jan Pouwel. "Seed dispersal and seed bank". In Nature Management by Grazing and Cutting, 317–33. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2255-6_11.

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Linke, K. H., A. Oswald, J. K. Ransom, D. D. Hess, S. Kachelriess e B. Kranz. "Seed features, germination and seed bank". In A Technical Manual for Parasitic Weed Research and Extension, 31–52. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0005-5_4.

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Hawkes, J. G., N. Maxted e B. V. Ford-Lloyd. "Seed Gene Bank Conservation". In The Ex Situ Conservation of Plant Genetic Resources, 82–91. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4136-9_6.

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Gutterman, Yitzchak. "Storage Conditions Affecting the Germinability of Seeds in the Seed Bank". In Seed Germination in Desert Plants, 145–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-75698-6_4.

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Nair, Kodoth Prabhakaran. "The Millennium Seed Bank—Their Conservation Roles and the Svalbard Global Seed Vault". In Springer Climate, 113–17. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23037-1_21.

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El-Keblawy, Ali. "Effects of Seed Storage on Germination of Desert Halophytes with Transient Seed Bank". In Sabkha Ecosystems: Volume IV: Cash Crop Halophyte and Biodiversity Conservation, 93–103. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7411-7_7.

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Eastwood, Ruth J., Sarah Cody, Ola T. Westengen e Roland Bothmer. "Conservation Roles of the Millennium Seed Bank and the Svalbard Global Seed Vault". In Crop Wild Relatives and Climate Change, 173–86. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118854396.ch10.

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Kumar, Adyant, Tapasya Choudhary, Susmita Das e Santosh K. Meena. "Weed Seed Bank: Impacts and Management for Future Crop Production". In Agronomic Crops, 207–23. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9783-8_12.

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Bocchi, S., A. Castrignanò e G. Gerosa. "Spatial Patterns of Soil Seed-Bank Related to Some Soil Properties". In Quantitative Geology and Geostatistics, 503–4. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0810-5_45.

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Hanley, Kendall A., Brianne M. Walsh e Todd P. Egan. "The Seed Bank of a Hypersaline Shrub Community in the Bahamas". In Sabkha Ecosystems, 251–59. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27093-7_13.

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Atti di convegni sul tema "Seed bank"

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Bandara, R. M. U. S., T. K. Ilangakoon, H. M. M. K. K. H. Dissanayaka, Y. M. S. H. I. U. De Silva, C. H. Piyasiri e D. M. C. B. Dissanayaka. "EFFECT OF ELEVATED TEMPERATURE ON WEED SEED GERMINATION IN PADDY SOIL SEED BANK". In International Conference on Agriculture and Forestry. The International Institute of Knowledge Management (TIIKM), 2018. http://dx.doi.org/10.17501/icoaf.2017.3103.

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Saulić, Markola, Ivica Đalović, Dragana Božić e Sava Vrbničanin. "PROCENA AKTIVNE REZERVE SEMENA KOROVSKIH BILJAKA U ZEMLJIŠTU". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.093s.

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Knowledge and understanding of the size and composition of soil weed seed reserves can help in planning a successful and timely weed control strategy and assessing the dynamics of weed emergence. It is very important to have an insight into what percentage of the latent plant community will pass into the active community. The seedling emregence method gives the number and structure of seeds that have passed the dormancy phase. It was determined that in the monoculture of soybean 24.9% of seeds are ready to germinate out of the total estimated weed seed bank, while in the three-field crop rotation 23.61% of seed. The largest number of germinated seeds comes from the weed species Chenopodium albumand Chenopodium hybridum.
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Elazazi, Elsayed Mohamed. "Effective Methods to Improvement Capparis Spinosa L. (Caper) Seeds Germination by Breaking Seed Dormancy in Qatar Gene Bank". In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2016. http://dx.doi.org/10.5339/qfarc.2016.eepp2483.

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Berbec, Adam Kleofas, e Beata Feledyn-Szewczyk. "Biodiversity of weeds and soil seed bank in organic and conventional farming systems". In Research for Rural Development, 2018. Latvia University of Life Sciences and Technologies, 2018. http://dx.doi.org/10.22616/rrd.24.2018.045.

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Allegretti, M., L. Gilli e L. Quaglia. "A microwave system connected to a IoT infrastructure for weed seed bank depletion". In 2017 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC). IEEE, 2017. http://dx.doi.org/10.1109/apwc.2017.8062318.

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Yuan, Long-Yi, Zhang-Yong Liu, Yong-Jun Feng e Xin-Hua Xue. "Impact of Water Level Fluctuations on Soil Seed Bank along Riparian Zone in JingJiang River". In 2013 Third International Conference on Intelligent System Design and Engineering Applications (ISDEA). IEEE, 2013. http://dx.doi.org/10.1109/isdea.2012.199.

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Корлэтяну, Людмила, Л. Мелиян, Анатолий Ганя, Виктория Михэилэ e Николай Ванькович. "Изучение потенциала хранения коллекционных образцов кукурузы (Zea mays L.) в условиях консервации ex situ". In VIIth International Scientific Conference “Genetics, Physiology and Plant Breeding”. Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2021. http://dx.doi.org/10.53040/gppb7.2021.53.

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Seed storage potential (SP) is an important complex indicator characterizing the ability of collection samples to be conserved ex situ in a genetic bank. The accelerated aging test (AA test) was used to determine the storage potential of maize samples. The AA test for maize seeds was carried out at 43-44°C, 90-100% relative humidity, with an aging time of 96 hours. After the test, various morphophysiological parameters were determined on 8 collection maize samples: germination energy and seed germination, root length and quantity, wet and dry root biomass. The maize genotypes were divided into 3 groups according to various post-test indicators: group 1 (high SP) – genotypes P235; P 310; P243; group 2 (medium SP) – genotypes Р 402, Р 383, Р 465; group 3 (low SP) - genotypes Р 461 и Р 427. Thus, the use of AA test on maize collection samples based on morphophysiological characteristics allows gradation of genotypes by seed SP.
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Melian, Lolita, Liudmila Corlateanu, Victoria Mihailă e Doina Cutitaru. "Evaluarea potenţialului de păstrare a seminţelor mostrelor din colecţia de Triticum durum L." In VIIth International Scientific Conference “Genetics, Physiology and Plant Breeding”. Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2021. http://dx.doi.org/10.53040/gppb7.2021.17.

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The test of accelerated aging of seeds (AAS) was applied on 7 genotypes of durum wheat, and the morphophysiological parameters of seeds and seedlings, such as dynamics of seed germination, length of seedling roots, fresh and dry biomass of seedlings, were investigated. The genotypic features of collection samples of durum wheat were identified after exposure to stress factors (high temperature and humidity). Such a grouping of genotypes according to their potential ability to preserve the viability of seeds is an important complex characteristic of collection samples when they are placed for long-term storage in a plant gene bank.
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Teodor, Rusu. "INFLUENCE OF TILLAGE SYSTEM AND WEED CONTROL METHODS ON THE WEEDING AND SOIL WEED SEED BANK". In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b32/s13.026.

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Berbeć, Adam Kleofas, e Beata Feledyn-Szewczyk. "Above-ground and seed bank weed biodiversity comparison in conventional and organic farming systems in Poland". In Research for Rural Development 2019 : annual 25th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2019. http://dx.doi.org/10.22616/rrd.25.2019.042.

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Rapporti di organizzazioni sul tema "Seed bank"

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Schuler, Thomas M., Melissa Thomas Van-Gundy, Mary B. Adams e W. Mark Ford. Seed bank response to prescribed fire in the central Appalachians. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station, 2010. http://dx.doi.org/10.2737/nrs-rp-9.

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Harmon, Janice M., e Jerry F. Franklin. Seed rain and seed bank of third- and fifth-order streams on the western slope of the Cascade Range. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1991. http://dx.doi.org/10.2737/pnw-rp-480.

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Huggins, T. R., B. A. Prigge, M. R. Sharifi e P. W. Rundel. Community Dynamics and Soil Seed Bank Ecology of Lane Mountain Milkvetch (Astragalus jaegerianus Munz). Fort Belvoir, VA: Defense Technical Information Center, agosto 2012. http://dx.doi.org/10.21236/ada582562.

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Abella, Scott R., e Judith D. Springer. Estimating soil seed bank characteristics in ponderosa pine forests using vegetation and forest-floor data. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2008. http://dx.doi.org/10.2737/rmrs-rn-35.

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Quak, Evert-jan. The Trend Of “De-Risking” In International Finance and Its Impact on Small Island Developing States. Institute of Development Studies, maggio 2022. http://dx.doi.org/10.19088/k4d.2022.079.

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This rapid review synthesises the literature from academic sources, knowledge institutions, non-governmental organisations (NGOs), and trusted independent media outlets on the challenges small island development states (SIDS) face when they lose correspondent banking relationships (CBRs). The rapid review concludes that, although the loss of CBRs is a global phenomenon, regions with SIDS, such as the Pacific and Caribbean, have seen the highest rates of withdrawals. During the last decade, local and regional banks in SIDS have lost and continue to lose bank accounts at large global banks to a critical level, sometimes having only one or none CBRs with banks in major economies, such as the Unites States, the United Kingdom, the European Union or Australia. This means that local banks have reduced access to financial services related to cross-border financial transactions, impacting on remittances and trade finance.
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Baker, Sarah E. Effects of Fire on Soil Seed Banks on the Hanford Site. Office of Scientific and Technical Information (OSTI), settembre 2000. http://dx.doi.org/10.2172/15010557.

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Wageningen Centre for Development Innovation. Protocol for collaboration between the National Genebank and Community Seed Banks. Wageningen: ISSD Africa, 2020. http://dx.doi.org/10.18174/548326.

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Latané, Annah, Jean-Michel Voisard e Alice Olive Brower. Senegal Farmer Networks Respond to COVID-19. RTI Press, giugno 2021. http://dx.doi.org/10.3768/rtipress.2021.rr.0045.2106.

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This study leveraged existing data infrastructure and relationships from the Feed the Future Senegal Naatal Mbay (“flourishing agriculture”) project, funded by the US Agency for International Development (USAID) and implemented by RTI International from 2015 to 2019. The research informed and empowered farmer organizations to track and respond to rural households in 2020 as they faced the COVID-19 pandemic. Farmer organizations, with support from RTI and local ICT firm STATINFO, administered a survey to a sample of 800 agricultural households that are members of four former Naatal Mbay–supported farmer organizations in two rounds in August and October 2020. Focus group discussions were conducted with network leadership pre- and post–data collection to contextualize the experience of the COVID-19 shock and to validate findings. The results showed that farmers were already reacting to the effects of low rainfall during the 2019 growing season and that COVID-19 compounded the shock through disrupted communications and interregional travel bans, creating food shortages and pressure to divert seed stocks for food. Food insecurity effects, measured through the Household Food Insecurity Access Scale and cereals stocks, were found to be greater for households in the Casamance region than in the Kaolack and Kaffrine regions. The findings also indicate that farmer networks deployed a coordinated response comprising food aid and access to personal protective equipment, distribution of short-cycle legumes and grains (e.g., cowpea, maize) and vegetable seeds, protection measures for cereals seeds, and financial innovations with banks. However, food stocks were expected to recover as harvesting began in October 2020, and the networks were planning to accelerate seed multiplication, diversify crops beyond cereals, improve communication across the network. and mainstream access to financial instruments in the 2021 growing season. The research indicated that the previous USAID-funded project had likely contributed to the networks’ COVID-19 resilience capacities by building social capital and fostering the new use of tools and technologies over the years it operated.
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Copes, Donald L. Bark scoring problem grafts in five Douglas-fir seed orchards: a case history. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1989. http://dx.doi.org/10.2737/pnw-rn-487.

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Price, Roz. Evidence on the Advantages of Low Carbon Growth in Jordan. Institute of Development Studies (IDS), agosto 2021. http://dx.doi.org/10.19088/k4d.2021.117.

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There has been a considerable amount of research generally into the benefits associated with low carbon development, showing that it can be synergistic with development priorities – such as job creation, improved public health, social inclusion and improved accessibility (see for example, Gouldson et al., 2018). However, this rapid review finds limited evidence and information around these benefits specifically for the Hashemite Kingdom of Jordan. There has been much interest in green growth in Jordan in the last ten years, particularly as Jordan is seen as having a large renewable energy potential for solar and wind. International organisations have been working with Jordan to develop comprehensive national plans and strategies to encourage green growth investment. Within the Jordanian government, the green growth concept has mainly been promoted by the Ministry of Environment. The World Bank in particular has produced a number of reports that have fed into this review, that explore or touch on green growth in Jordan – however, they themselves recognise that there is a lack of research on the economic and job-generating impacts of a green growth pathway in Jordan, and emphasise the need for further analysis (see specifically Hakim et al., 2017). Many of the green growth statistics referenced are from single reports undertaken a number of years ago – for example, that environmental degradation costs Jordan 2% of its GDP per year comes from a World Bank report written in 2010 and based on data from 2006 (World Bank, 2010). No more recent reviews were found during this rapid review. This review draws on a mixture of academic and grey literature from government and international organisations.
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