Do resources or natural enemies drive bee population dynamics in fragmented habitats?

abstract：:Patches, gradients, and hierarchies are three common organizational frameworks for assessing the effects of spatial heterogeneity on species distributions. Since these frameworks are often chosen a priori, without knowledge of study systems, they may not correspond to the empirical heterogeneity present and may result...

journal_title：Ecology

authors： Talley TS

更新日期：2007-06-01 00:00:00

abstract：:The linear regression model, with its numerous extensions including multivariate ordination, is fundamental to quantitative research in many disciplines. However, spatial or temporal structure in the data may invalidate the regression assumption of independent residuals. Spatial structure at any spatial scale can be m...

journal_title：Ecology

authors： Wagner HH

更新日期：2013-11-01 00:00:00

abstract：:This paper illustrates the advantages of a multilevel/hierarchical approach for predictive modeling, including flexibility of model formulation, explicitly accounting for hierarchical structure in the data, and the ability to predict the outcome of new cases. As a generalization of the classical approach, the multilev...

journal_title：Ecology

authors： Qian SS,Cuffney TF,Alameddine I,McMahon G,Reckhow KH

更新日期：2010-02-01 00:00:00

abstract：:The influence of pathogens on host fitness is one of the key questions in infection ecology. Hantaviruses have coevolved with their hosts and are generally thought to have little or no effect on host survival or reproduction. We examined the effect of Puumala virus (PUUV) infection on the winter survival of bank voles...

journal_title：Ecology

authors： Kallio ER,Voutilainen L,Vapalahti O,Vaheri A,Henttonen H,Koskela E,Mappes T

更新日期：2007-08-01 00:00:00

abstract：:Small streams account for the majority of channel length in river basins worldwide and are the primary conveyors of terrestrial nutrients to rivers and ultimately the oceans. The controls of stream nutrient fluxes, however, are debated. Classical models emphasize that nutrient transport in streams integrates nutrient ...

journal_title：Ecology

authors： Brookshire EN,Valett HM,Gerber S

更新日期：2009-02-01 00:00:00

abstract：:Humans are implicated as a major driver of species extinctions from the Late Pleistocene to the present. However, our predictive understanding of human-caused extinction remains poor due to the restricted temporal and spatial scales at which this process is typically assessed, and the risks of bias due to "extinction ...

journal_title：Ecology

authors： Crees JJ,Turvey ST,Freeman R,Carbone C

更新日期：2019-09-01 00:00:00

abstract：:Fungal endophytes are found in asymptomatic photosynthetic tissues of all major lineages of land plants. The ubiquity of these cryptic symbionts is clear, but the scale of their diversity, host range, and geographic distributions are unknown. To explore the putative hyperdiversity of tropical leaf endophytes, we compa...

journal_title：Ecology

authors： Arnold AE,Lutzoni F

更新日期：2007-03-01 00:00:00

abstract：:Genetic diversity, like species diversity, can have important consequences for communities and ecosystems. However, little is known about whether the effects of genetic diversity demonstrated in experimental assemblages are of sufficient strength to generate patterns in natural systems. We conducted a survey of eelgra...

journal_title：Ecology

authors： Hughes AR,Stachowicz JJ

更新日期：2009-05-01 00:00:00

abstract：:The most abundant elements contained in stem flow from American beech (Fagus grandifolia), red oak (Quercus rubra), and sugar maple (Acer saccharum) were C > K = Ca > Na = Mg = P. Variations in leaching potential and in concentration of chemical constituents around the base of beech trees, due to non-uniform stem flow...

journal_title：Ecology

authors： Gersper PL,Holowaychuk N

更新日期：1971-07-01 00:00:00

abstract：:The structure of Caribbean coral reef communities has been altered by numerous anthropogenic and natural stressors. Demographic studies of key functional groups have furthered efforts to describe and understand these changes. Little is known, however, about the demographics of sponges on coral reefs, despite their abu...

journal_title：Ecology

authors： McMurray SE,Henkel TP,Pawlik JR

更新日期：2010-02-01 00:00:00

abstract：:Metabolism shapes the ecosystem role of organisms by dictating their energy demand and nutrient recycling potential. Metabolic theory (MTE) predicts consumer metabolic and recycling rates will rise with warming, especially if body size declines, but it ignores potential for adaptation. We measured metabolic and nutrie...

journal_title：Ecology

authors： Moffett ER,Fryxell DC,Palkovacs EP,Kinnison MT,Simon KS

更新日期：2018-10-01 00:00:00

abstract：:Foraging theory posits that isolation from refuge habitat within a landscape increases perceived predation risk and, thus, suppresses the foraging behavior of prey species. However, these effects may depend fundamentally on resource availability, which could affect prey boldness and can change considerably through bot...

journal_title：Ecology

authors： Gil MA,Zill J,Ponciano JM

更新日期：2017-02-01 00:00:00

abstract：:Sex ratios are commonly skewed and variable in wild populations, but few studies track temporal trends in this demographic parameter. We examined variation in the operational sex ratio at two protected and declining breeding colonies of Magellanic Penguins (Spheniscus magellanicus) in Chubut, Argentina. Penguins from ...

journal_title：Ecology

authors： Gownaris NJ,García Borboroglu P,Boersma PD

更新日期：2020-03-01 00:00:00

abstract：:Global species extinction rates are orders of magnitude above the background rate documented in the fossil record. However, recent data syntheses have found mixed evidence for patterns of net species loss at local spatial scales. For example, two recent data meta-analyses have found that species richness is decreasing...

journal_title：Ecology

authors： Gonzalez A,Cardinale BJ,Allington GR,Byrnes J,Arthur Endsley K,Brown DG,Hooper DU,Isbell F,O'Connor MI,Loreau M

更新日期：2016-08-01 00:00:00

abstract：:Population cycles of herbivores are thought to be driven by trophic interaction mechanisms, either between food plant and herbivore or between the herbivorous prey and its natural enemies. Observational data have indicated that hymenopteran parasitoids cause delayed density-dependent mortality in cyclic autumnal moth ...

journal_title：Ecology

authors： Klemola N,Andersson T,Ruohomäki K,Klemola T

更新日期：2010-09-01 00:00:00

abstract：:Some species have disproportionate influence on assemblage structure, given their numbers or biomass. Most examples of such "strong interactors" come from small-scale experiments or from observations of the effects of invasive species. There is evidence that entire avian assemblages in open woodlands can be influenced...

journal_title：Ecology

authors： MacNally R,Bowen M,Howes A,McAlpine CA,Maron M

更新日期：2012-03-01 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

authors： Hines J,Megonigal JP,Denno RF

更新日期：2006-06-01 00:00:00

abstract：:Variation is an essential feature of biological populations, yet much of ecological theory treats individuals as though they are identical. This simplifying assumption is often justified by the perception that variation among individuals does not have significant effects on the dynamics of whole populations. However, ...

journal_title：Ecology

authors： Johnson DW,Freiwald J,Bernardi G

更新日期：2016-03-01 00:00:00

abstract：:The magnitude and direction of biological effects of environmental disturbances can vary considerably, especially among studies that use presence/absence manipulations. Because nonlinearities (e.g., humped relationships) are common in biological systems, this heterogeneity in effects may arise if systems are similar i...

journal_title：Ecology

authors： Gil MA

更新日期：2013-08-01 00:00:00

abstract：:Soils host diverse communities of interacting microbes and the nature of interspecific interactions is increasingly recognized to affect ecosystem-level processes. Antagonistic interactions between bacteria and fungi are of particular relevance for soil functioning. A number of soil bacteria produce secondary metaboli...

journal_title：Ecology

authors： Jousset A,Becker J,Chatterjee S,Karlovsky P,Scheu S,Eisenhauer N

更新日期：2014-05-01 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

authors： Doody JS,Soanes R,Castellano CM,Rhind D,Green B,McHenry CR,Clulow S

更新日期：2015-09-01 00:00:00

abstract：:Population context should influence pollination success and selection on floral display in animal-pollinated plants because attraction of pollinators depends not only on the characteristics of individual plants, but also on the attractiveness of co-occurring conspecifics. The insect-pollinated herb Primula farinosa is...

journal_title：Ecology

authors： Toräng P,Ehrlén J,Agren J

更新日期：2006-08-01 00:00:00

abstract：:The high herbivore diversity in savanna systems has been attributed to the inherent spatial and temporal heterogeneity related to the quantity and quality of food resources. Allometric scaling predicts that smaller-bodied grazers rely on higher quality forage than larger-bodied grazers. We replicated burns at varying ...

journal_title：Ecology

authors： Sensenig RL,Demment MW,Laca EA

更新日期：2010-10-01 00:00:00

abstract：:Analyzing ecological data often requires modeling the autocorrelation created by spatial and temporal processes. Many seemingly disparate statistical methods used to account for autocorrelation can be expressed as regression models that include basis functions. Basis functions also enable ecologists to modify a wide r...

journal_title：Ecology

authors： Hefley TJ,Broms KM,Brost BM,Buderman FE,Kay SL,Scharf HR,Tipton JR,Williams PJ,Hooten MB

更新日期：2017-03-01 00:00:00

abstract：:Herbivory and dispersal play roles in the coexistence of primary producers with shared resource limitation by imposing trade-offs either through apparent competition or dispersal limitation. These mechanisms of coexistence can further interact with meta-ecosystem effects, which results in spatial heterogeneity through...

journal_title：Ecology

authors： Marleau JN,Guichard F

更新日期：2019-06-01 00:00:00

abstract：:Plants interact with numerous enemies and mutualists simultaneously and sequentially. Such multispecies interactions can give rise to trait-mediated indirect effects that are likely to be common in nature but which are also inherently difficult to predict. Understanding multispecies interactions is also important in t...

journal_title：Ecology

authors： Swope SM,Parker IM

更新日期：2010-08-01 00:00:00

abstract：:The size of the regional species pool may influence local patterns of diversity. However, it is unclear whether certain spatial scales are less sensitive to regional influences than others. Additive partitioning was used to separate coral-dwelling fish diversity to its alpha and beta components, at multiple scales, in...

journal_title：Ecology

authors： Belmaker J,Ziv Y,Shashar N,Connolly SR

更新日期：2008-10-01 00:00:00

abstract：:Population density is the most basic ecological parameter for understanding population dynamics and biological conservation. Distance-based methods (or plotless methods) are considered as a more efficient but less robust approach than quadrat-based counting methods in estimating plant population density. The low robus...

journal_title：Ecology

authors： Shen G,Wang X,He F

更新日期：2020-10-01 00:00:00

abstract：:The nearly universal positive relationship between the distribution and abundance of species has been explained by several hypotheses but hitherto no consensus has been reached. Here, we used monitoring data of 105 phytophagous true bug species (Heteroptera) from 150 grassland sites over six years to test how (1) rang...

journal_title：Ecology

authors： Friess N,Gossner MM,Weisser WW,Brandl R,Brändle M

更新日期：2017-10-01 00:00:00

abstract：:This paper describes how to test, and potentially falsify, a multivariate causal hypothesis involving only observed variables (i.e., a path analysis) when the data have a hierarchical or multilevel structure, when different variables are potentially defined at different levels of such a hierarchy, and when different v...

journal_title：Ecology

authors： Shipley B

更新日期：2009-02-01 00:00:00