The stability of African savannas: insights from the indirect estimation of the parameters of a dynamic model.

abstract：:Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We e...

journal_title：Ecology

authors： Boyero L,Pearson RG,Dudgeon D,Graça MA,Gessner MO,Albariño RJ,Ferreira V,Yule CM,Boulton AJ,Arunachalam M,Callisto M,Chauvet E,Ramírez A,Chará J,Moretti MS,Gonçalves JF Jr,Helson JE,Chará-Serna AM,Encalada AC,Davies

更新日期：2011-09-01 00:00:00

abstract：:Herbivores are often implicated in the generation of the extraordinarily diverse tropical flora. One hypothesis linking enemies to plant diversification posits that the evolution of novel defenses allows plants to escape their enemies and expand their ranges. When range expansion involves entering a new habitat type, ...

journal_title：Ecology

authors： Fine PV,Metz MR,Lokvam J,Mesones I,Zuñiga JM,Lamarre GP,Pilco MV,Baraloto C

更新日期：2013-08-01 00:00:00

abstract：:Predators exert a strong influence on ecological communities by reducing the abundance of prey (consumptive effects) and shaping their foraging behavior (non-consumptive effects). Although the prevalence of trophic cascades triggered by non-consumptive effects is increasingly recognized in a wide range of ecosystems, ...

journal_title：Ecology

authors： Pessarrodona A,Boada J,Pagès JF,Arthur R,Alcoverro T

更新日期：2019-05-01 00:00:00

abstract：:A mechanistic understanding of the carbon (C) cycle-climate change feedback is essential for projecting future states of climate and ecosystems. Here we report a novel field mechanism and evidence supporting the hypothesis that nocturnal warming in a temperate steppe ecosystem in northern China can result in a minor C...

journal_title：Ecology

authors： Wan S,Xia J,Liu W,Niu S

更新日期：2009-10-01 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：:Bottom-up and top-down effects act together to exert strong control over plant growth and reproduction, but how physical stress modifies those interactive forces remains unclear. Even though empirical evidence is scarce, theory predicts that the importance of both top-down- and bottom-up forces may decrease as physica...

journal_title：Ecology

authors： Daleo P,Alberti J,Bruschetti CM,Pascual J,Iribarne O,Silliman BR

更新日期：2015-08-01 00:00:00

abstract：:According to the ideal free distribution (IFD) theory, individuals that are able to perceive the quality of different patches in a landscape and disperse freely are expected to redistribute themselves proportionally to the carrying capacities of heterogeneous patches. Here, we argue that, when dispersal is uncondition...

journal_title：Ecology

authors： Hendrickx F,Palmer SC,Travis JM

更新日期：2013-11-01 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：:The forage maturation hypothesis (FMH) states that herbivores should follow the onset of growth in spring to obtain access to forage of higher quality and quantity, the so-called "green wave surfing." Several studies have found correlative evidence in support of this by associating animal movement with plant phenology...

journal_title：Ecology

authors： Rivrud IM,Heurich M,Krupczynski P,Müller J,Mysterud A

更新日期：2016-12-01 00:00:00

abstract：:Phenotypic plasticity can be a passive response to fluctuating environmental conditions or an active and presumably adaptive (evolved) response selected for in different environments. Here we ask if the larval decision to enter diapause when reared on a host plant associated with a colder habitat is an active or a pas...

journal_title：Ecology

authors： Friberg M,Wiklund C

更新日期：2010-01-01 00:00:00

abstract：:Global environmental change (GEC) is affecting species interactions and causing a rapid decline in biodiversity. In this study, I present a new Ecosystem Disruption Index to quantify the impacts of simulated nitrogen (N) deposition (0, 10, 20, and 50 kg N·ha-1 ·yr-1  + 6-7 kg N·ha-1 ·yr-1 background) on abiotic and bi...

journal_title：Ecology

authors： Ochoa-Hueso R

更新日期：2016-10-01 00:00:00

abstract：:Variation in habitat quality and quantity drive selection on dispersal traits in heterogeneous environments, but the extent to which environmental conditions predict geographic variation in dispersal is rarely evaluated. We assessed dispersal trait variation across the range of Cakile edentula var. lacustris, an annua...

journal_title：Ecology

authors： LaRue EA,Holland JD,Emery NC

更新日期：2018-08-01 00:00:00

abstract：:Habitat fragmentation often arises from human-induced alterations to the matrix that reduce or eliminate dispersal between habitat patches. Elimination of dispersal increases local extinction and decreases recolonization. These phenomena were observed in the eastern collared lizard (Crotaphytus collaris collaris), whi...

journal_title：Ecology

authors： Templeton AR,Brazeal H,Neuwald JL

更新日期：2011-09-01 00:00:00

abstract：:Hydraulic traits are important for woody plant functioning and distribution. Associations among hydraulic traits, other leaf and stem traits, and species' performance are relatively well understood for trees, but remain poorly studied for lianas. We evaluated the coordination among hydraulic efficiency (i.e., maximum ...

journal_title：Ecology

authors： van der Sande MT,Poorter L,Schnitzer SA,Engelbrecht BMJ,Markesteijn L

更新日期：2019-05-01 00:00:00

abstract：:Studies of facilitation have primarily been limited to single mechanisms, species, or environments. We examined interacting mechanisms governing the facilitative effects of Pinus flexilis on two later successional understory species, Pseudotsuga menziesii and Ribes cereum, in different microhabitats and seasons at the...

journal_title：Ecology

authors： Baumeister D,Callaway RM

更新日期：2006-07-01 00:00:00

abstract：:For animals living in natural or semi-natural settings, empirical data on how sociality changes in response to increasing population density are few, especially with respect to true conspecific density and not group size. However, insight into this line of research may be far-reaching--from understanding density depen...

journal_title：Ecology

authors： Vander Wal E,Yip H,McLoughlin PD

更新日期：2012-01-01 00:00:00

abstract：:Increased incorporation of terrestrial organic matter (t-OM) into consumer biomass (allochthony) is believed to reduce growth capacity. In this study, we examined the relationship between crustacean zooplankton allochthony and production in a boreal lake that displays strong seasonal variability in t-OM inputs. Contra...

journal_title：Ecology

authors： Grosbois G,Vachon D,Del Giorgio PA,Rautio M

更新日期：2020-06-01 00:00:00

abstract：:Nutrient loss from ecosystems is among the top environmental threats to ecosystems worldwide, leading to reduced plant productivity in nutrient-poor ecosystems and eutrophication of surface water near nutrient-rich ecosystems. Hence, it is of pivotal importance to understand which factors influence nutrient loss. Here...

journal_title：Ecology

authors： van der Heijden MG

更新日期：2010-04-01 00:00:00

abstract：:The need to model and test hypotheses about complex ecological systems has led to a steady increase in use of path analytical techniques, which allow the modeling of multiple multivariate dependencies reflecting hypothesized causation and mechanisms. The aim is to achieve the estimation of direct, indirect, and total ...

journal_title：Ecology

authors： Clough Y

更新日期：2012-08-01 00:00:00

abstract：:Although birds and mammals play important roles in several mechanisms hypothesized to maintain plant diversity in species-rich habitats, there have been few long-term, community-level tests of their importance. We excluded terrestrial birds and mammals from fourteen 6 x 7.5 m plots in Australian primary tropical rain ...

journal_title：Ecology

authors： Theimer TC,Gehring CA,Green PT,Connell JH

更新日期：2011-08-01 00:00:00

abstract：:Studies of the distribution of elusive forest wildlife have suffered from the confounding of true presence with the uncertainty of detection. Occupancy modeling, which incorporates probabilities of species detection conditional on presence, is an emerging approach for reducing observation bias. However, the current li...

journal_title：Ecology

authors： Chelgren ND,Adams MJ,Bailey LL,Bury RB

更新日期：2011-02-01 00:00:00

abstract：:Temperature imposes a constraint on the rates and outcomes of ecological processes that determine community- and ecosystem-level patterns. The application of metabolic scaling theory has advanced our understanding of the influence of temperature on pattern and process in marine communities. Metabolic scaling theory us...

journal_title：Ecology

authors： Bruno JF,Carr LA,O'Connor MI

更新日期：2015-12-01 00:00:00

abstract：:Although many species face numerous predators in nature, the combined impact of multiple predators on the inducible defenses of prey has rarely been studied. Prey may respond with an intermediate phenotype that balances the risk from several sources or may simply respond to the most dangerous predator. I examined the ...

journal_title：Ecology

authors： Bourdeau PE

更新日期：2009-06-01 00:00:00

abstract：:We analyze an age-, size- and sex-structured model to investigate how the interplay between individual-level energy budget dynamics and the feedback of population grazing on resources shapes the individual life history and the dynamics of ungulate populations, living in a predator-free, seasonal resource environment. ...

journal_title：Ecology

authors： De Roos AM,Galic N,Heesterbeek H

更新日期：2009-04-01 00:00:00

abstract：:Recent studies have shown that genetically based traits of plants can structure associated arthropod and microbial communities, but whether the effects are consistent and repeatable across years is unknown. If communities are both heritable (i.e., related individuals tend to support similar communities) and repeatable...

journal_title：Ecology

authors： Keith AR,Bailey JK,Whitham TG

更新日期：2010-11-01 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

authors： Thygesen UH,Sommer L,Evans K,Patterson TA

更新日期：2016-07-01 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

authors： Smits AP,Schindler DE,Brett MT

更新日期：2015-07-01 00:00:00

abstract：:We studied a guild of desert winter annual plants that differ in long-term variation in per capita reproductive success (lb, the product of per capita survival from germination to reproduction, l, times per capita reproduction of survivors, b) to relate individual function to population and community dynamics. We hypo...

journal_title：Ecology

authors： Huxman TE,Barron-Gafford G,Gerst KL,Angert AL,Tyler AP,Venable DL

更新日期：2008-06-01 00:00:00

abstract：:We experimentally increased salinities in a tidal freshwater marsh on the Altamaha River (Georgia, USA) by exposing the organic rich soils to 3.5 yr of continuous (press) and episodic (pulse) treatments with dilute seawater to simulate the effects of climate change such as sea level rise (press) and drought (pulse). W...

journal_title：Ecology

authors： Solohin E,Widney SE,Craft CB

更新日期：2020-12-01 00:00:00

abstract：:Under a metacommunity framework, the spatial configuration of habitat fragments could determine local community structure. Yet, quantifying fragment connectivity is challenging, as it depends on multiple variables at several geographical scales. We assessed the extent to which fragment connectivity and area explain pa...

journal_title：Ecology

authors： Santos M,Cagnolo L,Roslin T,Marrero HJ,Vázquez DP

更新日期：2019-11-01 00:00:00