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Dataset results
14 results for “wintering strategy”
Data from: Radial stem growth of the clonal shrub Alnus alnobetula at treeline is constrained by summer temperature and winter desiccation and differs in carbon allocation strategy compared to co-occurring Pinus cembra
<p><strong>Data are documented in the following article:</strong></p> <p>Oberhuber W., G Wieser, F. Bernich, A. Gruber (2022) Radial stem growth of the clonal shrub <em>Alnus alnobetula</em> at treeline is constrained by summer temperature and winter desiccation and differs in carbon allocation strategy compared to co-occurring <em>Pinus cembra</em>. Forests 2022, 13, 440. doi: 10.3390/f13030440.</p> <p> </p> <p><strong>Summary:</strong></p> <p>Global change is affecting species areal distribution in many regions. A better understanding of how land-use change and climate warming affects shrub growth is essential for improved predictions of forest dynamics at the alpine treeline. Evaluation of radial stem growth of the clonal shrub <em>Alnus alnobetula</em> (= <em>Alnus viridis</em>) and the co-occurring tree species Swiss stone pine (<em>Pinus cembra</em>) within an alpine treeline ecotone revealed that mean ring width of nitrogen fixing <em>A. alnobetula</em> was about four times lower compared to <em>P. cembra</em>. Our findings are based on ring width data from <em>A. alnobetula</em> and <em>P. cembra</em> stems sampled at the alpine treeline ecotone on Mt. Patscherkofel (47°12’N, 11°27’E, Central European Alps, Austria, elevation range 2050 to 2190 m asl). Ring width time series include 86 radii from 51 stems of <em>A. alnobetula</em> (stems had mean age of 18±7 yrs) and 24 radii from 16 stems of <em>P. cembra </em>(18±4 yrs). We explain our findings by different carbon allocation strategies, i.e., preference of “vertical” stem growth in late successional <em>P. cembra</em> vs. favoring “horizontal” spread in the pioneer shrub<em> A. alnobetula.</em> By favouring clonal propagation over individual stem growth <em>A. alnobetula</em> is able to quickly spread at the alpine treeline ecotone.</p>
Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care
<p>Data set and R script supporting the publication entitled "<strong>Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care" </strong>by Jean-Claude Tourneur, Claire Cole, Jess Vickruck, Simon Dupont and Joël Meunier.</p> <ul> <li>Script Earwig oviposition - Zenodo v2.R = R script allowing to conduct the stats and obtain the figures presented in the manuscript</li> <li>Part I - Zenodo.txt = Data set of the first part of the experiment about the location of females and eggs until oviposition (included)</li> <li>Part II - Zenodo v2.txt = Data set of the second part of the experiment about the location of eggs after oviposition</li> <li>Readme.txt = details of the variables present in the 2 data sets</li> </ul>
Sex, body size, and winter weather explain migration strategies in a partial migrant population of American Kestrels (Falco sparverius)
<p>Given increasing evidence that climate change affects the annual cycles of birds, it is important to understand the mechanisms underlying individual migration strategies and population-level patterns in partial migrants. In this study, we found that thermoregulation (body size and winter temperatures) was a key driver of American Kestrel (<em>Falco</em> <em>sparverius</em>) migration decisions. The annual proportion of migrants in the population, however, was not explained by winter weather and may be the result of differential survival. We measured stable hydrogen isotope values (δD) of talon tissues collected from 501 breeding and overwintering birds to distinguish migrant from resident kestrels in a partially migratory population of American Kestrels in southwestern Idaho in 2013–2021. We then evaluated drivers of migration decisions by assessing potential correlates of migration strategies, whether individuals switched migration strategies between years, and whether the proportion of migrants in the population changed over time or was correlated with winter weather. Male kestrels were 1.6 times more likely to migrate than females, and in colder than average winters, smaller birds of both sexes were more likely to migrate than larger birds. Only 27% of 26 recaptured individuals showed evidence of switching their migration strategies on an annual basis. There was no temporal trend in the proportion of migrants in the population, but proportions varied between years. Interestingly, there was no association between winter minimum temperature anomalies and annual migrant proportions in the population, suggesting that differential over-winter survival, or other stochastic processes, may play an important role in population composition. As winters continue to warm, fewer kestrels may migrate and more may remain resident on breeding grounds. However, it is unclear how changes in migration strategies might affect population-level patterns and resilience to climate change.</p>
Sex, body size, and winter weather explain migration strategies in a partial migrant population of American Kestrels (Falco sparverius)
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Data from: Trade-offs between forage availability, accessibility, and predation risk on winter foraging strategies of wood bison (Bison bison athabascae)
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Evolution of winter moulting strategies in European and North American migratory passerines
<p>Moult is critical for birds as it replaces damaged feathers and worn plumage, enhancing flight performance, thermoregulation, and communication. In passerines, moult generally occurs on the breeding grounds during the post-breeding period once a year. However, some species of migrant passerines that breed in the Nearctic and western Palearctic regions have evolved different moulting strategies that involve moulting on the overwintering grounds. Some species forego moult on the breeding grounds and instead complete their prebasic moult on the overwintering grounds. Other species moult some or all feathers a second time (prealternate moult) during the overwintering period. Using phylogenetic analyses, we explored the po<span>tential drivers of the evolution of winter moults in Nearctic and western Palearctic breeding passerines. Our results indicate an association between longer photoperiods and the presence of prebasic and prealternate moults on the overwintering grounds for both Nearctic and western Palearctic species. We also found a relationship between prealternate moult and </span><span><span>generalist and water</span></span><span> habitats for western Palearctic species. Finally, the complete prealternate moult in western Palearctic passerines was linked to longer days on the overwintering grounds and longer migration distance. Longer days may favour the evolution of winter prebasic moult by increasing </span><span><span>the time window when birds can absorb essential nutrients</span></span><span> for moult. Alternatively, for birds undertaking a prealternate moult at the end of the overwintering period, longer days may increase exposure to feather-degrading ultra-violet radiation, necessitating the replacement of feathers. Our study underlines the importance of the overwintering grounds in the critical process of moult for many passerines that breed in th</span>e Nearctic and western Palearctic regions.</p>
Evolution of winter moulting strategies in European and North American migratory passerines
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Evaluating grazing response strategies in winter annuals: a multi-trait approach
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Data from: Divergence in strategies for coping with winter embolism among co-occurring temperate tree species: the role of positive xylem pressure, wood type and tree stature
1. In temperate ecosystems, freeze-thaw events are an important environmental stress that can induce severe xylem embolism (i.e. clogging of conduits by air bubbles) in overwintering organs of trees. However, no comparative studies of different adaptive strategies among sympatric tree species for coping with winter embolism have examined the potential role of the presence or absence of embolism refilling by positive xylem pressure. 2. We evaluated the degree of winter embolism and hydraulic architecture traits in 22 deciduous angiosperm tree species typical of temperate forest sites in NE China. Co-occurring trees growing in a local botanical garden were used to minimize variation caused by differences in proximal environmental conditions and to ensure that interspecific variation reflected genetic differences between species. 3. Four functional groups with potentially different strategies for coping with winter embolism were compared: positive xylem pressure generating species (PXP) that are all diffuse-porous, except a semi-ring-porous species, large (LDP) and small (SDP) statured diffuse-porous tree species that are unable to generate positive xylem pressure, and ring-porous species (RP). 4. The PXP group exhibited nearly full recovery from winter embolism in contrast to the other three groups, which showed persistent and relatively high degrees of hydraulic dysfunction during the subsequent growing season. The absence of a functional trade-off between hydraulic efficiency and safety against freeze-thaw induced embolism in the PXP group and the presence of a trade-off in the other three groups, suggests that the ability to generate root or stem pressure for embolism refilling may partially free some temperate tree species from adaptive constraints imposed by winter embolism formation. 5. Efficient winter embolism reversal by positive pressure in PXP species did not distinguish them from their non-xylem pressure-generating LDP counterparts in terms of various measures of xylem hydraulic efficiency during the growing season. Divergence in the ability to refill winter embolism through generation of positive xylem pressure implies a series of functional trade-offs that may partially explain the co-existence of these two types of temperate tree species.
Fig. 1 in Winter Distribution And Migratory Strategies Of Eurasian Spoonbills (Platalea Leucorodia) From The Pannonian Breeding Population: Are They Long-Distance Migrants?
Fig. 1. Winter distribution of the Hungarian Spoonbills ringed between 2003 and 2020. The map contains all wintering data collected between the winters of 2003/2004 and 2020/2021. The lines of 'winter shift' indicate the shifts between winters when a resident became a short-distance migrant (shifted from Hungary to Tunisia) and a short-distance migrant became a long-distance migrant (shifted from Morocco to Mauritania). Abbreviations: ind. = individuals; Carpathian B. = Carpathian Basin
Fig. 2 in Winter Distribution And Migratory Strategies Of Eurasian Spoonbills (Platalea Leucorodia) From The Pannonian Breeding Population: Are They Long-Distance Migrants?
Fig. 2. Detailed map on the winter distribution of the Hungarian Spoonbills in the Carpathian Basin and the Central and East Mediterranean areas. Abbreviations: ind. = indi- viduals; Carpathian B. = Carpathian Basin
Data from: Divergence in strategies for coping with winter embolism among co-occurring temperate tree species: the role of positive xylem pressure, wood type and tree stature
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Data from: To eat and not be eaten: diurnal mass gain and foraging strategies in wintering great tits
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Data from: Coping with the cold: energy storage strategies for surviving winter in freshwater fish
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.