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91 results for “resource partition”
Data from: Rehabilitating the cyanobacteria – niche partitioning, resource use efficiency, and phytoplankton community structure during diazotrophic cyanobacterial blooms
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Data from: Resource partitioning by insectivorous bats in Jamaica
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Data from: The roles of morphological traits, resource variation and resource partitioning associated with the dietary niche expansion in the fish-eating bat Myotis pilosus
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Data from: Isotopic and dietary niches as indicators for resource partitioning in the gleaner bats M. bechsteinii, M. nattereri, and P. auritus
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Data from: A new small captorhinid reptile from the lower Permian of Oklahoma and resource partitioning among small captorhinids in the Richards Spur fauna
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Data from: Resource partitioning facilitates coexistence in sympatric cetaceans in the California Current
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Spatial and temporal resource partitioning in a mixed-species colony of avian echolocators
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Resource partitioning is not coupled with assortative mating in sympatrically divergent ricefish in a Wallacean ancient lake
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Data from: Complementarity in spatial subsidies of carbon associated with resource partitioning along multiple niche axes
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Fig. 1 in Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil
Fig. 1. Study area. Map of the study area with locations of the sampling sites in the Mamanguape River Estuary, Brazil: Mud flat; Tidal Creek 1 and Tidal Creek 2.
Fig. 4 in Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil
Fig. 4. Volumetric Percentage (%V) per habitat (a) of the most important food items in the diet each size classes (TL1= small juveniles; TL2= juveniles and TL3= adults) of the Mamanguape river estuary, northeastern Brazil. (b: Mudflat, c: Tidal Creek 1 and d: Tidal Creek 2).
Fig. 3 in Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil
Fig. 3. Size distributions of Atherinella brasiliensis at sampling areas (Mudflat, Tidal Creek 1 and Tidal Creek 2) in de Mamanguape estuary river. Number of individuals (n) is listed. Age Class: White bar= small juveniles; Light Gray bar= juveniles, and Dark Gray bar= adults.
Fig. 6 in Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil
Fig. 6. Ordination diagram from the first two principal components for the functional traits of Atherinella brasiliensis in Mamanguape river estuary. Symbols size classes: Small juveniles (Open Black Square); Juveniles (Gray Circle) and Adults (Black Circle).
Fig. 2 in Food resource partitioning among species of Astyanax (Characiformes: Characidae) in the Lower Iguaçu River and tributaries, Brazil
Fig. 2. Volumetric percentage of the origin of food items in the diet of Astyanax species in the Low Iguaçu River and tributaries in Brazil.
Fig. 3 in Food resource partitioning among species of Astyanax (Characiformes: Characidae) in the Lower Iguaçu River and tributaries, Brazil
Fig. 3. Variation in diet breadth based on 40 food items consumed by five Astyanax species in the Low Iguaçu River and tributaries in Brazil. Diet breadth was evaluated by dispersion of the diet of species in the multivariate space by using PERMDISP (large spatial distance from the centroid indicates wide dispersion, i.e., wide trophic breadth). Lower and upper bars of the box represent 25 and 75 quartiles, respectively. The horizontal bar within each box represents the mean diet breadth.
Data from: Predation risk and resource abundance mediate foraging behaviour and intraspecific resource partitioning among consumers in dominance hierarchies
Dominance hierarchies and the resulting unequal resource partitioning among individuals are key mechanisms of population regulation. The strength of dominance hierarchies can be influenced by size-dependent trade-offs between foraging and predator avoidance whereby competitively inferior subdominants can access a larger proportion of limiting resources by accepting higher predation risk. Foraging-predation risk trade-offs also depend on resource abundance. Yet, few studies have manipulated predation risk and resource abundance simultaneously; consequently, their joint effect on resource partitioning within dominance hierarchies are not well understood. We addressed this gap by measuring behavioural responses of masu salmon (Oncorhynchus masou ishikawae) to experimental manipulations of predation risk and resource abundance in a natural temperate forest stream. Responses to predation risk depended on body size and social status such that larger fish (often social dominants) exhibited more risk-averse behaviour (e.g., lower foraging and appearance rates) than smaller subdominants after exposure to a simulated predator. The magnitude of this effect was lower when resources were elevated, indicating that dominant fish accepted a higher predation risk to forage on abundant resources. However, the influence of resource abundance did not extend to the population level, where predation risk altered the distribution of foraging attempts (a proxy for energy intake) from being skewed towards large individuals to being skewed towards small individuals after predator exposure. Our results imply that size-dependent foraging-predation risk trade-offs can weaken the strength of dominance hierarchies by allowing competitively inferior subdominants to access resources that would otherwise be monopolized.
Data from: Below-ground resource partitioning alone cannot explain the biodiversity–ecosystem function relationship: a field test using multiple tracers
1. Belowground resource partitioning is among the most prominent hypotheses for driving the positive biodiversity-ecosystem function relationship. However, experimental tests of this hypothesis in biodiversity experiments are scarce, and the available evidence is not consistent. 2. We tested the hypothesis that resource partitioning in space, in time, or in both space and time combined drives the positive effect of diversity on both plant productivity and community resource uptake. At the community level, we predicted that total community resource uptake and biomass production above- and belowground will increase with increased species richness or functional group richness. We predicted that at the species level resource partition breadth will become narrower, and that overlap between the resource partitions of different species will become smaller with increasing species richness or functional group richness. 3. We applied multiple resource tracers (Li and Rb as potassium analogues, the water isotopologues - H218O and 2H2O, and 15N) in three seasons at two depths across a species and functional group richness gradient at a grassland biodiversity experiment. We used this multidimensional resource tracer study to test if plant species partition resources with increasing plant diversity across space, time, or both simultaneously. 4. At the community level, community resource uptake of nitrogen and potassium and above- and belowground biomass increased significantly with increasing species richness but not with increasing functional group richness. However, we found no evidence that resource partition breadth or resource partition overlap decreased with increasing species richness for any resource in space, time, or both space and time combined. Synthesis: These findings indicate that belowground resource partitioning may not drive the enhanced resource uptake or biomass production found here. Instead, other mechanisms such as facilitation, species-specific biotic feedback, or aboveground resource partitioning are likely necessary for enhanced overall ecosystem function.
FIGURE 2 in Another new, diminutive Rock Gecko (Cnemaspis Strauch) from Peninsular Malaysia and a discussion of resource partitioning in sympatric species pairs
FIGURE 2. Dorsal (upper) and ventral (lower) view of holotype (ZRC 6695).
FIGURE 1 in Another new, diminutive Rock Gecko (Cnemaspis Strauch) from Peninsular Malaysia and a discussion of resource partitioning in sympatric species pairs
FIGURE 1. Distribution of Cnemaspis shahruli sp. nov. in northwestern Peninsular Malaysia.
Food resource partitioning between juvenile and mature weatherfish Misgurnus fossilis
<p><span>This study represents a description of the diet composition of one of the largest European cobitids, the weatherfish <i>Misgurnus fossilis</i>. Specimens were collected in a drainage canal, representing a typical habitat for weatherfish, and with gut content analysis conducted with regard to individual total length and maturity stage. Overall, the weatherfish diet mainly consisted of Copepoda, Cladocera,<i> </i>Oligochaeta, Crustacea (<i>Asellus aquaticu</i>s), Chironomidae, detritus and insect larvae. To evaluate size-related patterns of resource use, fish were assigned to two size classes, defined according to size at first maturation. ANOSIM analyses revealed major ontogenetic shifts in feeding strategy that were related to size and maturity, with a significant ontogenetic shift in feeding pattern, marked by differences in the proportions of the main taxonomic groups of prey consumed. Copepoda and Cladocera dominated in the diet of small and immature individuals, while large weatherfish primarily fed on detritus. Similarly, cluster analysis of diet classified into these food types showed distinct two groups comprising juvenile and mature fish. Spatially, weatherfish showed a change in feeding sites from the water column to substrate.</span></p>
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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)
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.