Abstract：
:A central challenge in ecology is to understand the interplay of internal and external controls on the growth of populations. We examined the effects of temporal variation in weather and spatial variation in vegetation on the strength of density dependence in populations of large herbivores. We fit three subsets of the model ln(Nt) = a + (1 + b) x ln(N(t-1)) + c x ln(N(t-2)) to five time series of estimates (Nt) of abundance of ungulates in the Rocky Mountains, USA. The strength of density dependence was estimated by the magnitude of the coefficient b. We regressed the estimates of b on indices of temporal heterogeneity in weather and spatial heterogeneity in resources. The 95% posterior intervals of the slopes of these regressions showed that temporal heterogeneity strengthened density-dependent feedbacks to population growth, whereas spatial heterogeneity weakened them. This finding offers the first empirical evidence that density dependence responds in different ways to spatial heterogeneity and temporal heterogeneity.
journal_name
Ecologyjournal_title
Ecologyauthors
Wang G,Hobbs NT,Boone RB,Illius AW,Gordon IJ,Gross JE,Hamlin KLdoi
10.1890/05-0355subject
Has Abstractpub_date
2006-01-01 00:00:00pages
95-102issue
1eissn
0012-9658issn
1939-9170journal_volume
87pub_type
杂志文章相关文献
ECOLOGY文献大全abstract：:Within most free-living species exists a cryptic community of interacting parasites. By combining multiscale field data with manipulative experiments, we evaluated patterns of parasite coinfection in amphibian hosts and their underlying mechanisms. Surveys of 86 wetlands and 1273 hosts revealed positive correlations b...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/10-0570.1
更新日期：2011-03-01 00:00:00
abstract：:Surf zones, classified from reflective to dissipative, separate the ocean from shore and subsidies from the coastal ocean must pass through surf zones to reach the shore. We have observed that variations in phytoplankton concentrations in the water over the intertidal zone varied with surf-zone hydrodynamics and we hy...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.2415
更新日期：2018-08-01 00:00:00
abstract：:Although the study of resource subsidies has emerged as a key topic in both ecosystem and food web ecology, the dialogue over their role has been limited by separate approaches that emphasize either subsidy quantity or quality. Considering quantity and quality together may provide a simple, but previously unexplored, ...
journal_title：Ecology
pub_type： 杂志文章,评审
doi：10.1890/10-2240.1
更新日期：2011-06-01 00:00:00
abstract：:Whether different sources of mortality are additive, compensatory, or depensatory is a key question in population biology. A way to test for additivity is to calculate the correlation between cause-specific mortality rates obtained from marked animals. However, existing methods to estimate this correlation raise sever...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/09-1931.1
更新日期：2010-07-01 00:00:00
abstract：:Historically, terrestrial food web theory has been compartmentalized into interactions among aboveground or belowground communities. In this study we took a more synthetic approach to understanding food web interactions by simultaneously examining four trophic levels and investigating how nutrient (nitrogen and carbon...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/0012-9658(2006)87[1542:nstbmi]2.0.co;2
更新日期：2006-06-01 00:00:00
abstract：:Competition is predicted to affect the expression of inducible defenses, but because costs of behavioral and morphological antipredator defenses differ along resource gradients, its effects on defenses may depend on the traits considered. We tested the predictions from different defense models in tadpoles of the commo...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/06-1703.1
更新日期：2007-07-01 00:00:00
abstract：:Although the ecological success of introduced species hinges on biotic interactions and physical conditions, few experimental studies--especially on animals--have simultaneously investigated the relative importance of both types of factors. The lack of such research may stem from the common assumption that native and ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/07-0122.1
更新日期：2007-12-01 00:00:00
abstract：:Despite important advances in the ecology of river food webs, the strength and nature of the connection between the meio- and macrofaunal components of the web are still debated. Some unresolved issues are the effects of the inclusion of meiofaunal links and their temporal variations on the overall river food web prop...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.1553
更新日期：2016-11-01 00:00:00
abstract：:Soil properties are well known to affect vegetation, but the role of soil heterogeneity in the patterning of vegetation dynamics is poorly documented. We asked whether the location of an ecotone separating grass-dominated and sparsely vegetated areas reflected only historical variation in degradation or was related to...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/0012-9658(2006)87[963:shgpvd]2.0.co;2
更新日期：2006-04-01 00:00:00
abstract：:Although soil microbial communities are known to play crucial roles in the cycling of nutrients in forest ecosystems and can vary by plant species, how microorganisms respond to the subtle gradients of plant genetic variation is just beginning to be appreciated. Using a model Populus system in a common garden with rep...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/07-0337.1
更新日期：2008-03-01 00:00:00
abstract：:Lianas (woody vines) are an important and dynamic component of many forests throughout the world, and increases in CO2, mean winter temperature, and forest fragmentation may promote their growth and proliferation in temperate forests. In this study, we used a 45-year data set to test the hypothesis that lianas have in...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/0012-9658(2006)87[2973:tdolat]2.0.co;2
更新日期：2006-12-01 00:00:00
abstract：:Morphological plasticity is a striking characteristic of plants in natural communities. In the context of foraging behavior particularly, root plasticity has been documented for numerous species. Root plasticity is known to mitigate competitive interactions by reducing the overlap of the individuals' rhizospheres. But...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/10-1086.1
更新日期：2011-03-01 00:00:00
abstract：:Mutualisms are well known to influence individual fitness and the population dynamics of partner species, but little is known about whether they influence species distributions and the location of geographic range limits. Here, we examine the contribution of plant-pollinator interactions to the geographic range limit ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/11-1462.1
更新日期：2012-05-01 00:00:00
abstract：:The temporal stability of aggregate community and ecosystem properties is influenced by the variability of component populations, the interactions among populations, and the influence of environmental fluctuations on populations. Environmental fluctuations that enhance population variability are generally expected to ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/07-1652.1
更新日期：2008-11-01 00:00:00
abstract：:Global biodiversity decline has prompted great interest in the effects of habitat modification and diversity on the functioning and stability of ecosystem processes. However, the applicability of previous modeled or mesocosm community studies to real diverse communities in different habitats remains ambiguous. We expo...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/0012-9658(2006)87[3047:defaso]2.0.co;2
更新日期：2006-12-01 00:00:00
abstract：:Growth of soil microorganisms is often described as carbon limited, and adding labile carbon to soil often results in a transient and large increase in respiration. In contrast, soil microbial biomass changes little, suggesting that growth and respiration are decoupled in response to a carbon pulse. Alternatively, mea...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.2887
更新日期：2020-01-01 00:00:00
abstract：:Plant-root-associated microbes influence plant phenotype and tolerance to environmental stress, and thus have been hypothesized to play a role in plant local adaptation. Here, we test this hypothesis with factorial experiments addressing the role of microbes in local adaptation of Hypericum perforatum (St. John's wort...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.3092
更新日期：2020-08-01 00:00:00
abstract：:Although invasive species can have substantial impacts on animal communities, cases of invasive species facilitating native species by removing their predators have rarely been demonstrated across vertebrate trophic linkages. The predictable spread of the invasive cane toad (Rhinella marina), however, offered a unique...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/14-1332.1
更新日期：2015-09-01 00:00:00
abstract：:The ecological drivers of soil biodiversity in the Southern Hemisphere remain underexplored. Here, in a continental survey comprising 647 sites, across 58 degrees of latitude between tropical Australia and Antarctica, we evaluated the major ecological patterns in soil biodiversity and relative abundance of ecological ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.2137
更新日期：2018-03-01 00:00:00
abstract：:Coral reefs are highly complex ecological systems, where multiple processes interact across scales in space and time to create assemblages of exceptionally high biodiversity. Despite the increasing frequency of hierarchically structured sampling programs used in coral-reef science, little progress has been made in qua...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/07-0487.1
更新日期：2009-01-01 00:00:00
abstract：:Does climate determine species' ranges? Rapid rates of anthropogenic warming make this classic ecological question especially relevant. We ask whether climate controls range limits by quantifying relationships between climatic variables (precipitation, temperature) and tree growth across the altitudinal ranges of six ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/10-1639.1
更新日期：2011-06-01 00:00:00
abstract：:Ongoing climate change is shifting the geographic distributions of some species, potentially imposing rapid changes in local community structure and ecosystem functioning. Besides changes in population-level interspecific interactions, such range shifts may also cause changes in functional structure within the host as...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1002/ecy.3150
更新日期：2020-11-01 00:00:00
abstract：:There has been a lengthy debate on whether the abundance of adult reef fishes depends on prerecruitment or postrecruitment processes; however, we still do not have the ability to predict the magnitude of local fish recruitment. Here we show that the success of the leopard grouper (Mycteroperca rosacea) recruitment in ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/06-0857.1
更新日期：2007-09-01 00:00:00
abstract：:Abstract. Physical attributes of rivers control the quantity and quality of energy sources available to consumers, but it remains untested whether geomorphic conditions of whole watersheds affect the assimilation of different resources by stream organisms. We compared the fatty acid (FA) compositions of two invertebra...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/14-2247.1
更新日期：2015-07-01 00:00:00
abstract：:Loss of functional connectivity following habitat loss and fragmentation could drive species declines. A comprehensive understanding of fragmentation effects on functional connectivity of an ecological assemblage requires investigation of multiple species with different mobilities, at different spatial scales, for eac...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/13-1328.1
更新日期：2014-06-01 00:00:00
abstract：:Accurate description of spatial distribution of species is essential for correctly modeling macroecological patterns and thus to infer mechanisms of species coexistence. The Poisson and negative binomial distribution (NBD) are most widely used to respectively model random and aggregated distributions of species in inf...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/09-2233.1
更新日期：2010-12-01 00:00:00
abstract：:Bigeye tuna are known for remarkable daytime vertical migrations between deep water, where food is abundant but the water is cold, and the surface, where water is warm but food is relatively scarce. Here we investigate if these dive patterns can be explained by dynamic optimal foraging theory, where the tuna maximizes...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/15-1130.1
更新日期：2016-07-01 00:00:00
abstract：:Greater resource use by diverse communities might result from species occupying complementary niches. Demonstrating niche complementarity among species is challenging, however, due to the difficulty in relating differences between species in particular traits to their use of complementary resources. Here, we overcame ...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/12-0188.1
更新日期：2012-09-01 00:00:00
abstract：:Seed dispersal fundamentally influences plant population and community dynamics but is difficult to quantify directly. Consequently, models are frequently used to describe the seed shadow (the seed deposition pattern of a plant population). For vertebrate-dispersed plants, animal behavior is known to influence seed sh...
journal_title：Ecology
pub_type： 杂志文章
doi：10.1890/0012-9658(2006)87[3160:iabisd]2.0.co;2
更新日期：2006-12-01 00:00:00
abstract：:Introduced parasites threaten native host species that lack effective defenses. Such parasites increase the risk of extinction, particularly in small host populations like those on islands. If some host species are tolerant to introduced parasites, this could amplify the risk of the parasite to vulnerable host species...
journal_title：Ecology
pub_type： 杂志文章
doi：
更新日期：2016-04-01 00:00:00
