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91 results for “Resource partitioning”
FIGURE 6 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 6 | A. Scaled isotopic niches and B. Isotopic overlap of Haemulon aurolineatum, H. plumierii and H. squamipina captured along the northeast coast of Brazil.
FIGURE 5 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 5 | Isotopic ratios of carbon (δ¹³C) and nitrogen (δ15N) of Haemulon plumierii, H. aurolineatum and H. squamipinna in different latitude gradient and ontogeny captured along the northeast coast of Brazil. The black horizontal line and box represent the median value and the interquartile range, while the vertical lines represent the upper and lower limits. Outliers were not included in the plot. *All caught specimens of H. squamipinna were considered adults, not allowing ontogenetic analysis. Different symbols (*, ** and **) represent significant difference. Ontogeny* - All caught specimens of H. squamipinna were considered adults, not allowing ontogenetic analysis.
FIGURE 3 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 3 | Modified Costello diagram (Pi, prey specific abundance; Fo, frequency of occurence), a scatterplot containing all prey items, showing the feeding strategy of Haemulon aurolineatum and H. plumierii captured along the northeast coast of Brazil.
FIGURE 1 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 1 | Study area and sample points along the continental shelf of the northeast coast of Brazil. Red dots indicate samples for inner position (≤ 20 km) and black dots for outer (> 20 km).
FIGURE 2 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 2 | Feeding intensity indicator (Fi) of Haemulon aurolineatum and H. plumierii in different habitats, latitude gradient, shelf position, ontogeny and period of the day. The black horizontal line and box represent the median value and the interquartile range, while the vertical lines represent the upper and lower limits. Outliers were not included in the plot. Different symbols (* and **) represent significant difference.
FIGURE 4 in Trophic ecology and resource partitioning of Haemulidae species along the Northeastern Brazilian continental shelf
FIGURE 4 | Isotopic ratios of carbon (δ¹³C) and nitrogen (δ15N) of Haemulon plumierii, H. aurolineatum, and H. squamipinna in different habitats and shelf position captured along the northeast coast of Brazil. The black horizontal line and box represent the median value and the interquartile range, while the vertical lines represent the upper and lower limits. Outliers were not included in the plot. Different symbols (* and **) represent significant difference.
Fig. 2 in Food resource partitioning in a fish community of the central Amazon floodplain
Fig. 2. Relative importance of food categories in supporting the community's biomass of fish species inhabiting a floodplain lake (lago do Rei) in Central Amazonia in the two seasons.
Fig. 3 in Food resource partitioning in a fish community of the central Amazon floodplain
Fig. 3. Distribution of overlaps values between diets of fish species inhabiting a floodplain lake (lago do Rei) in Central Amazonia. a: whole community all seasons (74 species); b: generalist species all seasons (27 species); and c: seasonal differences (23 species).
Resources for publication "Meteorologically normalised long-term trends of atmospheric ammonia (NH3) in Switzerland/Liechtenstein and the explanatory role of gas-aerosol partitioning"
<p>Resources for publication "Meteorologically normalised long-term trends of atmospheric ammonia (NH3) in Switzerland/Liechtenstein and the explanatory role of gas-aerosol partitioning".</p>
Data and code from: The overlooked link between different resource partitioning strategies and plant species richness in tropical alpine ecosystems
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Data from: Resource partitioning among pelagic predators remains stable despite annual variability in diet composition
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Data from: Selfish partners: resource partitioning in male coalitions of Asiatic lions
Behavioral plasticity within species is adaptive which directs survival traits to take multiple pathways under varying conditions. Male-male cooperation is an evolutionary strategy often exhibiting an array of alternatives between and within species. African male lions coalesce to safeguard territories and mate-acquisition. Unique to these coalitions is lack of strict hierarchies between partners, who have similar resource-securities possibly because of many mating-opportunities within large female-groups. Skewed mating and feeding rights have only been documented in large coalitions where males were related. However, smaller modal prey coupled with less simultaneous mating-opportunities for male Asiatic lions in Gir forests, India would likely result in a different coalition-structure. Observations on mating-events (n=127) and feeding-incidents (n=44) were made on 11 male-coalitions and 9 female-prides in Gir, to assess resource distribution within- and among- different sized male-coalitions. Information from 39 males were used to estimate annual tenure-holding probabilities. Single-males had smaller tenures and appropriated fewer matings than coalition-males. Pronounced dominance-hierarchies were observed within coalitions, with one partner getting >70% of all matings and 47% more food. Competition between coalition-partners at kills increased with decline in prey-size, increase in coalition-size and the appetite-states of the males. However, immediate subordinates in coalitions had higher reproductive fitness than single-males. Declining benefits to partners with increasing coalition-size, with individuals below the immediate subordinates having fitness comparable to single-males, suggest to an optimal coalition-size of two lions. Lions under higher competitive selection in Gir show behavioral plasticity to form hierarchical-coalitions, wherein partners utilize resources asymmetrically, yet coalesce for personal gains.
Trophic resource partitioning drives fine-scale coexistence in cryptic bat species
Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, co-occurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and High Throughput Sequencing to characterise for the first time the trophic ecology of two recently-described cryptic bat species with parapatric ranges, Myotis escalerai and Myotis crypticus. We collected faecal samples from allopatric and sympatric regions and from syntopic and allotopic locations within the sympatric region to describe the diets both taxonomically and functionally and compare prey consumption with prey availability. The two bat species had highly similar diets characterised by high arthropod diversity, particularly Lepidoptera, Diptera and Araneae, and a high proportion of prey that is not volant at night, which points to extensive use of gleaning. Diet overlap at the prey-item level was lower in syntopic populations, supporting trophic shift under fine-scale co-occurrence. Furthermore, the diet of M. escalerai had a marginally lower proportion of not nocturnally volant prey in syntopic populations, suggesting that the shift in diet may be driven by a change in foraging mode. Our findings suggest that fine-scale coexistence mechanisms can have implications for maintaining broad-scale diversity patterns. This study highlights the importance of including both allopatric and sympatric populations and choosing meaningful spatial scales for detecting ecological patterns. We conclude that a combination of high taxonomic resolution with a functional approach helps identify patterns of niche shift.
Data from: Resource partitioning and interspecific interactions among sympatric rain forest arboreal mammals of the Western Ghats, India
<p>Resource partitioning in a community of diurnal arboreal mammals consisting of the lion-tailed macaque Macaca silenus, bonnet macaque (BM) Macaca radiata, Nilgiri langur Semnopithecus johnii, and the Indian giant squirrel Ratufa indica of the Western Ghats, southern India, was studied. Differences in their diet, vertical stratification, food resource niche breadth, niche overlap, and behavioral interactions were examined. Resource partitioning was through differential habitat use, resource use, and vertical stratification. Of the four species, the BM was not a resident species and made frequent forays into evergreen forest from the adjacent deciduous forest during the flowering season of Cullenia exarillata and fruiting season of Ficus microcarpa. The macaques had narrower niches, and the langur and the squirrel had wider niches. Niche overlap was highest between the two macaques. Overlap among the study species was particularly pronounced during the flowering of C. exarillata. There was significant correlation between niche overlap and intolerance among the study species. Certain species pairs showed little or no mutual intolerance despite high overlap. Cooperative interactions such as alarm calls occurred more frequently among the resident species. Interaction matrices revealed an underlying pattern of interspecific dominance hierarchy, with the BM dominating over the other three species. Our study suggests that the BM do not coexist with the other three because of high overlap with its congener and low occurrence of cooperative interactions.</p>
Data from: Selfish partners: resource partitioning in male coalitions of Asiatic lions
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Data from: Evaluating Sphagnum traits in the context of resource economics and optimal partitioning theories
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Data from: Apex predators and the facilitation of resource partitioning among mesopredators
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Trophic resource partitioning drives fine-scale coexistence in cryptic bat species
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Data from: Disparate feeding mechanics between two hadrosaurid dinosaurs support the potential for resource partitioning
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Data from: Density-dependent resource partitioning of temperate large herbivore populations under rewilding
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