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119 results for “resources availability”
Data from: Past and present resource availability affect mating rate but not choice in Drosophila melanogaster
The choices of when, where, and with whom to mate represent some of the most important decisions an individual can make to increase their fitness. Several studies have shown that the resources available to an individual during development can dramatically alter their mating rate later in life, and even the choice of mate. However, an individual's surroundings and available resources can change rapidly, and it is not clear how quickly the redistribution of resources towards reproduction can change. To address this important question, we measured mating rate and mate choice among Drosophila melanogaster males that were manipulated in terms of both past resources (control vs. starvation) and the resources available during mate choice (food vs. no food). We found that males given access to ample resources prior to mate choice showed higher mating rates than those that were starved, in agreement with previous studies. However, we also found that this effect can be reversed quickly, as starved males given the opportunity to mate in a high-quality environment mated at frequencies equivalent to their fed counterparts. While past and present resources affected mating rate, they did not affect mate choice, as males mated with high quality females at high frequencies regardless of their condition and environment. Our results show that both current condition as well as the promise of future resources can dramatically influence individuals' investment into reproduction, and that such mating decisions are extremely plastic and reliant on environmental cues.
Data from: Parallel genetic adaptation across environments differing in mode of growth or resource availability
Evolution experiments have demonstrated high levels of genetic parallelism between populations evolving in identical environments. However, natural populations evolve in complex environments that can vary in many ways, likely sharing some characteristics but not others. Here we ask whether shared selection pressures drive parallel evolution across distinct environments. We addressed this question in experimentally evolved populations founded from a clone of the bacterium <i>Burkholderia cenocepacia</i>. These populations evolved for 90 days (approximately 600 generations) under all combinations of high or low carbon availability and selection for either planktonic or biofilm modes of growth. Populations that evolved in environments with shared selection pressures (either level of carbon availability or mode of growth) were more genetically similar to each other than populations from environments that shared neither characteristic. However, not all shared selection pressures led to parallel evolution. Genetic parallelism between low-carbon biofilm and low-carbon planktonic populations was very low despite shared selection for growth under low-carbon conditions, suggesting that evolution in low-carbon environments may generate stronger tradeoffs between biofilm and planktonic modes of growth. For all environments, a population's fitness in a particular environment was positively correlated with the genetic similarity between that population and the populations that evolved in that particular environment. Although genetic similarity was low between low-carbon environments, overall, evolution in similar environments led to higher levels of genetic parallelism and that genetic parallelism, in turn, was correlated with fitness in a particular environment.
Data from: Past and present resource availability affect mating rate but not choice in Drosophila melanogaster
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Data from: Parallel genetic adaptation across environments differing in mode of growth or resource availability
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Data from: Estimating resource preferences of a native bumblebee: the effects of availability and use-availability models on preference estimatess
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Data from: Resource availability and sexual size dimorphism: differential effects of prey abundance on the growth rates of tropical snakes
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Data from: Species diversity rises exponentially with the number of available resources in a multi-trait competition model
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Data from: Linking resource availability and heterogeneity to understorey species diversity through succession in boreal forest of Canada
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Data from: Grazing and resource availability control soil nematode body size and abundance-mass relationship in semi-arid grassland
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Data from: Multichannel feeding by spider functional groups is driven by feeding strategies and resource availability
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Data from: The roles of interspecific variability in seed mass and soil resource availability in root system development
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Data from: Lifelong foraging and individual specialisation are influenced by temporal changes of resource availability
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Metabolic rate interacts with resource availability to determine individual variation in microhabitat use in the wild
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Vegetation complexity and nesting resource availability predict bee diversity and functional traits in community gardens
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Data from: Floral resource availability from groundcover promotes bee abundance in coffee agroecosystems
Patterns of bee abundance and diversity across different spatial scales have received thorough research consideration. However, the impact of short and long term temporal resource availability on biodiversity has been less explored. This is highly relevant in tropical agricultural systems for pollinators, as many foraging periods of pollinators extend beyond flowering of any single crop species. In this study, we sought to understand how bee communities in tropical agroecosystems changed between seasons, and if short and long term floral resource availability influenced their diversity and abundance. We used a threshold analysis approach in order to explore this relationship at two time scales. This study took place in a region dominated by coffee agroecosystems in Southern Mexico. This was an ideal system because the landscape offers a range of coffee management regimes that maintain heterogeneity in floral resource availability spatially and temporally. We found that the bee community varies significantly between seasons. There were higher abundances of native social, solitary and managed honeybees during the dry season when coffee flowers. Additionally, we found that floral resources from groundcover, but not trees, were associated with bee abundance. Further, the temporal scale of the availability of these resources is important, whereby short-term floral resource availability appears particularly important in maintaining high bee abundance at sites with lower seasonal complementarity. We argue that in additional to spatial resource heterogeneity, temporal resource heterogeneity is critical in explaining bee community patterns, and should thus be considered to promote pollinator conservation.
The Impact of Regional Resources and Technology Availability on Carbon Dioxide Removal Potential in the United States
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Resource Availability Following Critical Illness
ClinicalTrials.gov study NCT03800628. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Data from: Floral resource availability from groundcover promotes bee abundance in coffee agroecosystems
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Phylogenetic patterns in the microbial response to resource availability: amino acid incorporation in San Francisco Bay
GEO Series GSE56119. marine metagenome. 5 samples. Type: Non-coding RNA profiling by array.
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Allen Brain Atlas
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