筛选
科学数据
统计数据
共检索到2689条 ,权限内显示50条;
Data from: Plant reproductive strategies vary under low and high pollinator densities
- 负责人：
- DOI：
- doi:10.5061/dryad.73gp5
- 摘要：
- in the floral traits of plant populations in these landscapes, suggesting that variations in pollinator population density and foraging rates can drive floral trait
Data from: The relative strengths of rapid and delayed density dependence acting on a terrestrial herbivore change along a pollution gradient
- 负责人：
- Hunter, Mark
- 关键词：
- climate warming density dependence emission decline pollution population cycles population dynamics insect-plant relationships
- DOI：
- doi:10.5061/dryad.sn0cn43
- 摘要：
- to the associations with pollution, associations between climate change and leafminer population densities were negligible. 5. Our results may help to explain
Data from: Rapid adaptive evolution in novel environments acts as an architect of population range expansion
- 负责人：
- DOI：
- doi:10.5061/dryad.6tc61
- 摘要：
- Colonization and expansion into novel landscapes determine the distribution and abundance of species in our rapidly changing ecosystems worldwide
Data from: Spatial and temporal unpredictability of colony size in cliff swallows across 30 years
- 负责人：
- 关键词：
- DOI：
- doi:10.5061/dryad.t3b18
- 摘要：
- te and aggregate preferentially at high-quality sites. These hypotheses make predictions about how consistent colony size should be across sites and among yea
Data from: Patterns of pollen flow in a dense population of the insect-pollinated canopy tree species Castanopsis sieboldii
- 负责人：
- DOI：
- doi:10.5061/dryad.s17s3d5r
- 摘要：
- Insect pollinations of tree species with high-density populations have rarely been studied. Since the density of adults can affect effective
Data from: Density dependence and population regulation in marine fish: a large-scale, long-term field manipulation
- 负责人：
- Hixon, Mark A.
- 关键词：
- competition coral-reef fish fecundity fisheries growth marine metapopulation mortality predation population dynamics recruitment
- DOI：
- doi:10.5061/dryad.r6b3s
- 摘要：
- e, habitat complexity was relatively low, increasing the risk of predation, especially at low population densities when fish would have to travel longer distances
Data from: Sex-specific density-dependent secretion of glucocorticoids in lizards: insights from laboratory and field experiments
- 负责人：
- Meylan, Sandrine
- DOI：
- doi:10.5061/dryad.pm86h
- 摘要：
- food restriction. In the field experiments, corticosterone levels of females were not affected by population density. Corticosterone levels of males increased
Data from: Clone configuration and spatial genetic structure of two Halophila ovalis populations with contrasting internode lengths
- 负责人：
- 关键词：
- microsatellites;clonal growth;internode length;spatial genetic structure;Halophila ovalis;2005-2015
- DOI：
- doi:10.5061/dryad.68s80k7
- 摘要：
- with contrasting internode lengths (Yingluo versus Xialongwei populations). We found moderate to high genotypic and allelic richness and heterozygosities in bot
Data from: Impacts of honeybee density on crop yield: a meta-analysis
- 负责人：
- Rollin, Orianne
- 关键词：
- Apis mellifera colony density visitation rate crop yield fruit set seed set fruit weight management strategy
- DOI：
- doi:10.5061/dryad.dj5f7kc
- 摘要：
- , even within single crops and cultivars. 2. We performed an extensive literature search to record honeybee densities (colony density and/or flower
Data from: Population differentiation in common walnut (Juglans regia L.) across major parts of its native range - insights from molecular
- 负责人：
- DOI：
- doi:10.5061/dryad.4fq25
- 摘要：
- , and longitude, and differentiated populations according to their origin. Pakistani and Indian populations showed highest nut densities. These South Asian populations
