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332 results for “environmental conditions”
Figure 5 in Onset and duration of gray seal (Halichoerus grypus) molt in the Wadden Sea, and the role of environmental conditions
Figure 5. The proportion of visible molting seals in late-molt over time for the years between 2004 and 2010. The onset of molt varied per year: the earliest onset in 2009 and the latest onset in 2008. The bubble size indicates the number of animals with an observation quality score of 1 for each survey. The dashed horizontal line shows the 50% level and the vertical bold red and black dashed lines show at what day of the year 50% of the visible molting animals were in late-molt, respectively.
Supplementary material 4 from: Skálová H, Moravcová L, Čuda J, Pyšek P (2019) Seed-bank dynamics of native and invasive Impatiens species during a five-year field experiment under various environmental conditions. NeoBiota 50: 75-95. https://doi.org/10.3897/neobiota.50.34827
: Data type: statistical data
Supplementary material 1 from: Skálová H, Moravcová L, Čuda J, Pyšek P (2019) Seed-bank dynamics of native and invasive Impatiens species during a five-year field experiment under various environmental conditions. NeoBiota 50: 75-95. https://doi.org/10.3897/neobiota.50.34827
: Data type: multimedia
Supplementary material 3 from: Skálová H, Moravcová L, Čuda J, Pyšek P (2019) Seed-bank dynamics of native and invasive Impatiens species during a five-year field experiment under various environmental conditions. NeoBiota 50: 75-95. https://doi.org/10.3897/neobiota.50.34827
: Data type: multimedia
Supplementary material 2 from: Skálová H, Moravcová L, Čuda J, Pyšek P (2019) Seed-bank dynamics of native and invasive Impatiens species during a five-year field experiment under various environmental conditions. NeoBiota 50: 75-95. https://doi.org/10.3897/neobiota.50.34827
: Data type: statistical data
Figure 1. The sampling sites for capturing C in Influence of environmental variability on the body condition of the mangrove horseshoe crab Carcinoscorpius rotundicauda from Banyuasin Estuarine, South Sumatra, Indonesia
Figure 1. The sampling sites for capturing C. rotundicauda in Banyuasin Estuary Waters. The sampling was conducted together with local fishermen using a trammel net.
Files associated with Rui Jin, Anand Gnanadesikan and Christopher Holder, Using Random Forests to Compare the Sensitivity of Observed Particulate Inorganic and Particulate Organic Carbon to Environmental Conditions
Open the record for dataset details and reuse information.
Dynamic weakening in sandstone-derived fault gouges during simulated small-magnitude earthquakes under variable loading and environmental conditions
<p><span>Faults exhibit dynamic weakening during large displacements (>1 m) at seismic slip velocities (>0.1 m/s), but the role of this weakening in small-displacement induced earthquakes (M 3–4), such as those in the Groningen Gas Field (the Netherlands), remains unclear. We conducted seismic slip-pulse experiments on Slochteren sandstone gouges (SSG) using a rotary-shear apparatus to investigate their dynamic behavior. Pre-sheared gouge layers, confined between ~1.5 mm thick sandstone host blocks, were subjected to slip pulses at initial effective normal stresses of 4.9–16.6 MPa and pore fluid pressures of 0.1 and 1 MPa under undrained conditions. Slip pulses reached peak velocities of 1.8 m/s, accelerations up to 42 m/s², and displacements of 7.5–15 cm, using either dry Argon or water as pore fluid at ambient temperatures. Water-saturated gouges showed rapid weakening from a peak friction of ~0.7 to ~0.3, with early dilatancy followed by slower ongoing dilation. In contrast, Argon-filled samples exhibited only subtle weakening. Our findings confirm that water-saturated SSG weakens substantially during slip, with minimal dependence on normal stress, slip acceleration, or displacement, while dry samples do not. Microstructural analysis indicates no systematic relationship between PSZ width and frictional work or power input densities, suggesting that wear or heat production alone does not govern PSZ growth. Instead, thermal pore fluid pressurization, potentially involving water phase transitions at asperity scales, may drive weakening in short-displacement, induced seismic events.</span></p>
Data from: The impact of reproductive investment and early-life environmental conditions on senescence: support for the disposable soma hypothesis
Several hypotheses have been put forward to explain the evolution of senescence. One of the leading hypotheses, the disposable soma hypothesis, predicts a trade-off, whereby early-life investment in reproduction leads to late-life declines in survival (survival senescence). Testing this hypothesis in natural populations is challenging, but important for understanding the evolution of senescence. We used the long-term data set from a contained, predator-free population of individually marked Seychelles warblers (Acrocephalus sechellensis) to investigate how age-related declines in survival are affected by early-life investment in reproduction and early-life environmental conditions. The disposable soma hypothesis predicts that higher investment in reproduction, or experiencing harsh conditions during early life, will lead to an earlier onset, and an increased rate, of senescence. We found that both sexes showed similar age-related declines in late-life survival consistent with senescence. Individuals that started breeding at a later age showed a delay in survival senescence, but this later onset of breeding did not result in a less rapid decline in late-life survival. Although survival senescence was not directly related to early-life environmental conditions, age of first breeding increased with natal food availability. Therefore, early-life food availability may affect senescence by influencing age of first breeding. The disposable soma hypothesis of senescence is supported by delayed senescence in individuals that started breeding at a later age and therefore invested less in reproduction.
Data from: Predation selects for smaller eye size in a vertebrate: effects of environmental conditions and sex
Increased eye size in animals results in a larger retinal image and thus improves visual acuity. Thus, larger eyes should aid both in finding food as well as detecting predators. On the other hand, eyes are usually very conspicuous and several studies have suggested that eye size is associated with predation risk. However, experimental evidence is scanty. In this study, we address how predation affects variation in eye size by performing two experiments using Eurasian perch juveniles as prey and either larger individuals or pike as predators. First, we used large outdoor tanks to compare selection due to predators on relative eye size in open and artificial vegetated habitats. Second, we studied the effects of both predation risk and resource levels on phenotypic plasticity in relative eye size in indoor aquaria experiments. In the first experiment, we found that habitat altered selection due to predators, since predators selected for smaller eye size in a non-vegetated habitat, but not in vegetated habitat. In the plasticity experiment, we found that fish predators induced smaller eye size in males, but not in females, while resource levels had no effect on eye size plasticity. Our experiments provide evidence that predation risk could be one of the driving factors behind variation in eye size within species.
Data from: Environmental conditions affect spatial genetic structures and dispersal patterns in a solitary rodent
The study of the spatial distribution of relatives in a population under contrasted environmental conditions provides critical insights into the flexibility of dispersal behaviour and the role of environmental conditions in shaping population relatedness and social structure. Yet few studies have evaluated the effects of fluctuating environmental conditions on relatedness structure of solitary species in the wild. The aim of this study was to determine the impact of interannual variations in environmental conditions on the spatial distribution of relatives [spatial genetic structure (SGS)] and dispersal patterns of a wild population of eastern chipmunks (Tamias striatus), a solitary rodent of North America. Eastern chipmunks depend on the seed of masting trees for reproduction and survival. Here, we combined the analysis of the SGS of adults with direct estimates of juvenile dispersal distance during six contrasted years with different dispersal seasons, population sizes and seed production. We found that environmental conditions influences the dispersal distances of juveniles and that male juveniles dispersed farther than females. The extent of the SGS of adult females varied between years and matched the variation in environmental conditions. In contrast, the SGS of males did not vary between years. We also found a difference in SGS between males and females that was consistent with male-biased dispersal. This study suggests that both the dispersal behaviour and the relatedness structure in a population of a solitary species can be relatively labile and change according to environmental conditions.
Data for: Larval environmental conditions influence plasticity in resource use by adults in the burying beetle, Nicrophorus vespilloides
<p><span><span><span><span><span><span><span><span><span><span><span>Recent studies have shown that intraspecific patterns of phenotypic plasticity can mirror patterns of evolutionary diversification among species. This appears to be the case in <i>Nicrophorus </i>beetles. Within species, body size is positively correlated with the size of carrion used to provision larvae and parental performance. Likewise, among species, variation in body size influences whether species exploit smaller or larger carrion and the extent to which larvae depend on parental care. However, it is unclear whether developmental plasticity in response to carcass size, parental care, or both underlie transitions to new carcass niches. We examined this by testing whether variation in the conditions experienced by <i>N. vespilloides </i>larvae influenced their ability to breed efficiently upon differently sized carcasses as adults. We found that the conditions experienced by larvae during development played a critical role in determining their ability to use large carcasses effectively as adults. Specifically, individuals that developed with parental care and on large carcasses were best able to convert the resources on a large carcass into offspring when breeding themselves. Our results suggest that parentally-induced plasticity can be important in the initial stages of niche expansion.</span></span></span></span></span></span></span></span></span></span></span></p> <p> </p>
Figure 7 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 7 dbRDA ordination for the model of the investigated cave sites (based on Bray–Curtis similarity) factored with distance ranges: 1 – 0–60 m, 2 – 280–380 m, 3 – 460–650 m.
Figure 6 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 6 Changes in the biomass of stygobionts according to the distance from the cave entrance (2018–2019).
Figure 8 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 8 dbRDA ordination for the investigated cave sites during the research in autumn 2019 (based on Bray–Curtis similarity) factored with luminosity ranges: 0 – 0 lx, 1 – 0.07–2.7 lx, 2 – 13.17 lx, 3 – 555 lx.
Figure 3 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 3 Changes in the number of stygoxenes, stygophiles and stygobionts according to the distance from the cave entrance (2018–2019).
Figure 4 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 4 The most numerous stygobionts in the Lower Shakuranskaya Cave AXiphocaridinella osterloffi (Juzbaš'jan, 1941) BPontohoratia birsteini (Starobogatov, 1962).
Figure 1 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 1 A Location of the Lower Shakuranskaya Cave on the map of Abkhazia B sampling stations location scheme in the Lower Shakuranskaya Cave in 2018–2019. In numbers – stations, sampled in February 2018, May and October, 2019; in letters – additional stations, sampled in October, 2019 (for each station indicated numbers of stygobionts, stygophiles and stygoxenes). Views on the cave stream C at station 2 (ecotone zone) D at station 4 E at station 5.
Figure 2 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 2 The variation in the values of Shannon diversity index along the distance from the cave entrance (2018–2019).
Figure 5 from: Borisov RR, Chertoprud ES, Palatov DM, Novichkova AA (2021) Variability in macrozoobenthic assemblages along a gradient of environmental conditions in the stream water of karst caves (Lower Shakuranskaya Cave, western Caucasus). Subterranean Biology 39: 107-127. https://doi.org/10.3897/subtbiol.39.65733
Figure 5 Changes in the biomass of stygoxenes, stygophiles and stygobionts according to the distance from the cave entrance (2018–2019).
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.