筛选
科学数据
共检索到5971条 ,权限内显示50条;
Data from: Bottom-up regulation of parasite population densities in freshwater ecosystems
- 负责人：
- 摘要：
- te interactions. Empirical evidence that spatial variation in local host density drives parasite population density remains scarce, however. We test the coupling
Data from: Density dependence in demography and dispersal generates fluctuating invasion speeds
- 负责人：
- 摘要：
- . We show that density dependence in demography at low population densities—i.e., an Allee effect—combined with spatiotemporal variability
Data from: An evaluation of rearing densities to improve growth and survival of hatchery spring Chinook salmon
- 负责人：
- Olson, Douglas E.
- 摘要：
- gnificant difference was found in median fork length (P <0.001) for fish reared at different densities in the one year length was measured in the fall. Fish reared at high density
Data from: Density regulation in Northeast Atlantic fish populations: density dependence is stronger in recruitment than in somatic growth
- 负责人：
- Zimmermann, Fabian
- 关键词：
- Population dynamics Population regulation Life-history strategy Early life stages Marine ecosystems Fisheries ecology
- 摘要：
- of density regulation on population biomass. 4. Statistically significant density dependence in recruitment was detected in a large proportion of populations
Data from: Nonlinear scaling of foraging contacts with rodent population density
- 负责人：
- 摘要：
- Density-dependent shifts in population processes like territoriality, reproduction, dispersal, and parasite transmission are driven by change
Data from: Density-dependent movement and the consequences of the Allee effect in the model organism Tetrahymena
- 负责人：
- 摘要：
- which led to negative densitydependence at low population densities and generally positive density-dependence at high population densities due to
Data from: Size-selectivity of predation by brown bears depends on the density of their sockeye salmon prey
- 负责人：
- Cunningham, Curry James
- 摘要：
- Can variation in prey density drive changes in the intensity or direction of selective predation in natural systems? Despite ample evidence of
Data from: Scale-dependent shifts in the species composition of flower visitors with changing floral density
- 负责人：
- Essenberg, Carla J.
- 关键词：
- Foraging behavior Flower visitation Pollination Seasonal variation Density dependence Floral rewards Nectar Pollen Flower handling time Search speed
- 摘要：
- , including plant population dynamics and the evolution of flowering phenology. Many studies have found effects of floral or plant density
Data from: Density-dependent habitat selection predicts fitness and abundance in a small lizard
- 负责人：
- Paterson, James
- 摘要：
- Density-dependent habitat selection has been used to predict and explain patterns of abundance of species between habitats. Thermal quality
Data from: Partitioning the sources of demographic variation reveals density-dependent nest predation in an island bird population
- 负责人：
- 摘要：
- , while also evaluating how biotic and abiotic factors jointly shape demography. We examined the effects of population density and precipitation on fecundity
