Abstract:
:The tortuosity of the track taken by an animal searching for food profoundly affects search efficiency, which should be optimised to maximise net energy gain. Models examining this generally describe movement as a series of straight steps interspaced by turns, and implicitly assume no turn costs. We used both empirical- and modelling-based approaches to show that the energetic costs for turns in both terrestrial and aerial locomotion are substantial, which calls into question the value of conventional movement models such as correlated random walk or Lévy walk for assessing optimum path types. We show how, because straight-line travel is energetically most efficient, search strategies should favour constrained turn angles, with uninformed foragers continuing in straight lines unless the potential benefits of turning offset the cost.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Wilson RP,Griffiths IW,Legg PA,Friswell MI,Bidder OR,Halsey LG,Lambertucci SA,Shepard ELdoi
10.1111/ele.12149subject
Has Abstractpub_date
2013-09-01 00:00:00pages
1145-50issue
9eissn
1461-023Xissn
1461-0248journal_volume
16pub_type
杂志文章相关文献
ECOLOGY LETTERS文献大全abstract::Understanding and predicting range expansion are key objectives in many basic and applied contexts. Among dioecious organisms, there is strong evidence for sex differences in dispersal, which could alter the sex ratio at the expansion's leading edge. However, demographic stochasticity could also affect leading-edge se...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12049
更新日期:2013-03-01 00:00:00
abstract::Climate change and variation in atmospheric ozone are influencing the intensity of ultraviolet radiation (UVR) reaching ecosystems. Changing UVR regimes, in turn, may alter epidemics of infectious disease. This possibility hinges on the sensitivity of epidemiologically relevant traits of host and parasite to UVR. We a...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2011.01707.x
更新日期:2012-01-01 00:00:00
abstract::Studies of consumer-resource interactions suggest that individual diet specialisation is empirically widespread and theoretically important to the organisation and dynamics of populations and communities. We used weighted networks to analyze the resource use by sea otters, testing three alternative models for how indi...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/j.1461-0248.2012.01760.x
更新日期:2012-05-01 00:00:00
abstract::Dams are recognised to impact aquatic biodiversity, but the effects and conclusions diverge across studies and locations. By using a meta-analytical approach, we quantified the effects of impoundment on fish communities distributed across three large biomes. The impacts of dams on richness and diversity differed acros...
journal_title:Ecology letters
pub_type: 杂志文章,评审
doi:10.1111/ele.13283
更新日期:2019-09-01 00:00:00
abstract::Demographic senescence is increasingly recognised as an important force shaping the dynamics of wild vertebrate populations. However, our understanding of the processes that underpin these declines in survival and fertility in old age remains limited. Evidence for age-related changes in foraging behaviour and habitat ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12965
更新日期:2018-07-01 00:00:00
abstract::Species coexistence in diverse communities likely results from multiple interacting factors. Mechanisms such as conspecific negative density dependence (CNDD) and varying life-history strategies related to resource partitioning are known to influence plant fitness, and thereby community composition and diversity. Howe...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12915
更新日期:2018-04-01 00:00:00
abstract::Root systems are important for global models of below-ground carbon and nutrient cycling. Notoriously difficult sampling methods and the fractal distribution of root diameters in the soil make data being used in these models especially susceptible to error resulting from under-sampling. We applied the concept of speci...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12119
更新日期:2013-07-01 00:00:00
abstract::Although models of evolution usually assume that the strength of selection on a trait and the expression of genetic variation in that trait are independent, whenever the same ecological factor impacts both parameters, a correlation between the two may arise that accelerates trait evolution in some environments and slo...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12662
更新日期:2016-10-01 00:00:00
abstract::The silver spoon effect in the context of habitat selection occurs when dispersers in good condition are more likely to settle in high-quality habitats than dispersers in poor condition. Positive relationships between disperser condition and the quality of post-dispersal habitats are predicted by at least two non-excl...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2006.00972.x
更新日期:2006-11-01 00:00:00
abstract::The growth rate hypothesis posits that the rate of protein synthesis is constrained by phosphorus (P) supply. P scarcity invokes differential expression of genes involved in processing of most if not all elements encompassing an individual (the ionome). Whether such ionome-wide adjustments to P supply impact growth an...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13505
更新日期:2020-07-01 00:00:00
abstract::Correlative analyses predict that anthropogenic climate warming will cause widespread extinction but the nature and generality of the underlying mechanisms is unclear. Warming-induced activity restriction has been proposed as a general explanatory mechanism for recent population extinctions in lizards, and has been us...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12192
更新日期:2013-12-01 00:00:00
abstract::While the anthropogenic impact on ecosystems today is evident, it remains unclear if the detrimental effect of hominins on co-occurring biodiversity is a recent phenomenon or has also been the pattern for earlier hominin species. We test this using the East African carnivore fossil record. We analyse the diversity of ...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13451
更新日期:2020-03-01 00:00:00
abstract::We used the largest DNA-based phylogeny of flowering plants to date to evaluate the importance of energy vs. past climate change in predicting global patterns in diversification. Relative diversification rates increased towards the equator, suggesting that differences in per-lineage net diversification may be an impor...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2007.01138.x
更新日期:2008-02-01 00:00:00
abstract::The genetic basis of organism response to stoichiometric mismatches between environmental availability and somatic demand is still poorly understood. This study reports a consistent genotype x environment interaction related to phosphorus : carbon availability to Daphnia. In multiple pairs of Daphnia pulicaria clones,...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2009.01368.x
更新日期:2009-11-01 00:00:00
abstract::Synchronised and quasi-periodic production of seeds by plant populations, known as masting, is implicated in many ecological processes, but how it arises remains poorly understood. Flowering and pollination dynamics are hypothesised to provide the mechanistic link for the observed relationship between weather and popu...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13609
更新日期:2020-12-01 00:00:00
abstract::Bacteria typically rely on secreted metabolites, potentially shareable at the community level, to scavenge resources from the environment. The evolution of diffusible, shareable metabolites is, however, difficult to explain because molecules can get lost, or be exploited by cheating mutants. A key question is whether ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12371
更新日期:2014-12-01 00:00:00
abstract::Why some organisms become invasive when introduced into novel regions while others fail to even establish is a fundamental question in ecology. Barriers to success are expected to filter species at each stage along the invasion pathway. No study to date, however, has investigated how species traits associate with succ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12493
更新日期:2015-10-01 00:00:00
abstract::Rising sea temperatures cause mass coral bleaching and threaten reefs worldwide. We show how maps of variations in thermal stress can be used to help manage reefs for climate change. We map proxies of chronic and acute thermal stress and develop evidence-based hypotheses for the future response of corals to each stres...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2010.01562.x
更新日期:2011-02-01 00:00:00
abstract::How does life history affects the short-term elasticities of population growth rate? We decompose short-term elasticity as a sum of (i) the effect of the perturbation in rates on the unperturbed population structure and (ii) the effect of the original vital rates on the difference in structure between the original and...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2007.01108.x
更新日期:2007-12-01 00:00:00
abstract::Species extinctions are biased towards higher trophic levels, and primary extinctions are often followed by unexpected secondary extinctions. Currently, predictions on the vulnerability of ecological communities to extinction cascades are based on models that focus on bottom-up effects, which cannot capture the effect...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12096
更新日期:2013-05-01 00:00:00
abstract::Plant diversity experiments generally find that increased diversity causes increased productivity; however, primary productivity is typically measured in the presence of a diverse food web, including pathogens, mutualists and herbivores. If food web impacts on productivity vary with plant diversity, as predicted by bo...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12754
更新日期:2017-04-01 00:00:00
abstract::Latitudinal gradients in biotic interactions have been suggested as causes of global patterns of biodiversity and phenotypic variation. Plant biologists have long speculated that outcrossing mating systems are more common at low than high latitudes owing to a greater predictability of plant-pollinator interactions in ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12738
更新日期:2017-03-01 00:00:00
abstract::Epidemiologists increasingly realize that species interactions (e.g. selective predation) can determine when epidemics start and end. We hypothesize here that resource quality can also strongly influence disease dynamics: epidemics can be inhibited when resource quality for hosts is too poor and too good. In three lak...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2008.01264.x
更新日期:2009-02-01 00:00:00
abstract::Whether climate change will turn cold biomes from large long-term carbon sinks into sources is hotly debated because of the great potential for ecosystem-mediated feedbacks to global climate. Critical are the direction, magnitude and generality of climate responses of plant litter decomposition. Here, we present the f...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2007.01051.x
更新日期:2007-07-01 00:00:00
abstract::Nematomorph parasites manipulate crickets to enter streams where the parasites reproduce. These manipulated crickets become a substantial food subsidy for stream fishes. We used a field experiment to investigate how this subsidy affects the stream community and ecosystem function. When crickets were available, predato...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2012.01798.x
更新日期:2012-08-01 00:00:00
abstract::Intrinsic processes are assumed to underlie life history expression and trade-offs, but extrinsic inputs are theorised to shift trait expression and mask trade-offs within species. Here, we explore application of this theory across species. We do this based on parentally induced embryo temperature as an extrinsic inpu...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12103
更新日期:2013-06-01 00:00:00
abstract::Intra- and interspecific plant-plant interactions are fundamental to patterns of community assembly and to the mixture effects observed in biodiversity studies. Although much research has been conducted at the species level, very little is understood about how genetic variation within and among interacting species may...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2011.01710.x
更新日期:2012-01-01 00:00:00
abstract::Understanding life history and demographic variation among species within communities is a central ecological goal. Mortality schedules are especially important in ecosystems where disturbance plays a major role in structuring communities, such as coral reefs. Here, we test whether a trait-based, mechanistic model of ...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12306
更新日期:2014-08-01 00:00:00
abstract::Biodiversity studies are sensitive to well-recognised temporal and spatial scale dependencies. Cross-study syntheses may inflate these influences by collating studies that vary widely in the numbers and sizes of sampling plots. Here we evaluate sources of inaccuracy and imprecision in study-level and cross-study estim...
journal_title:Ecology letters
pub_type: 杂志文章,meta分析,评审
doi:10.1111/ele.13641
更新日期:2021-02-01 00:00:00
abstract::Experimental studies assessing climatic effects on ecological communities have typically applied static warming treatments. Although these studies have been informative, they have usually failed to incorporate either current or predicted future, patterns of variability. Future climates are likely to include extreme ev...
journal_title:Ecology letters
pub_type: 杂志文章,评审
doi:10.1111/ele.12095
更新日期:2013-06-01 00:00:00