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  • Evolution of Visual Processing in the Human Retina
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-19
    Trevor D. Price, Rebia Khan

    Motion detection in humans is based on luminance differences, now shown likely to be processed by a specialized set of cone cells, separate from the cone cells that process color. Humans appear to have evolved a mechanism analogous to that proposed for the double cones of other vertebrates, lost as vision simplified in our nocturnal ancestors.

    更新日期:2017-09-19
  • Transformative Research Is Not Easily Predicted
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-15
    Sarah A. Gravem, Silke M. Bachhuber, Heather K. Fulton-Bennett, Zachary H. Randell, Alissa J. Rickborn, Jenna M. Sullivan, Bruce A. Menge

    Transformative research (TR) statements in scientific grant proposals have become mainstream. However, TR is defined as radically changing our understanding of a concept, causing a paradigm shift, or opening new frontiers. We argue that it is rarely possible to predict the transformative nature of research. Interviews and surveys of 78 transformative ecologists suggest that most TR began with incremental goals, while transformative potential was recognized later. Most respondents thought TR is unpredictable and should not be prioritized over ‘incremental’ research that typically leads to breakthroughs. Importantly, TR directives might encourage scientists to overstate the importance of their research. We recommend that granting agencies (i) allocate only a subset of funds to TR and (ii) solicit more realistic proposal statements.

    更新日期:2017-09-16
  • Process, Mechanism, and Modeling in Macroecology
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-14
    Sean R. Connolly, Sally A. Keith, Robert K. Colwell, Carsten Rahbek

    Macroecology has traditionally relied on descriptive characterization of large-scale ecological patterns to offer narrative explanations for the origin and maintenance of those patterns. Only recently have macroecologists begun to employ models termed ‘process-based’ and ‘mechanistic’, in contrast to other areas of ecology, where such models have a longer history. Here, we define and differentiate between process-based and mechanistic features of models, and we identify and discuss important advantages of working with models possessing such features. We describe some of the risks associated with process-based and mechanistic model-centered research programs, and we propose ways to mitigate these risks. Giving process-based and mechanistic models a more central role in research programs can reinvigorate macroecology by strengthening the link between theory and data.

    更新日期:2017-09-15
  • Understanding the Processes Underpinning Patterns of Phylogenetic Regionalization
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-14
    Barnabas H. Daru, Tammy L. Elliott, Daniel S. Park, T. Jonathan Davies

    A key step in understanding the distribution of biodiversity is the grouping of regions based on their shared elements. Historically, regionalization schemes have been largely species centric. Recently, there has been interest in incorporating phylogenetic information into regionalization schemes. Phylogenetic regionalization can provide novel insights into the mechanisms that generate, distribute, and maintain biodiversity. We argue that four processes (dispersal limitation, extinction, speciation, and niche conservatism) underlie the formation of species assemblages into phylogenetically distinct biogeographic units. We outline how it can be possible to distinguish among these processes, and identify centers of evolutionary radiation, museums of diversity, and extinction hotspots. We suggest that phylogenetic regionalization provides a rigorous and objective classification of regional diversity and enhances our knowledge of biodiversity patterns.

    更新日期:2017-09-15
  • Deconstructing Superorganisms and Societies to Address Big Questions in Biology
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-09
    Patrick Kennedy, Gemma Baron, Bitao Qiu, Dalial Freitak, Heikki Helanterä, Edmund R. Hunt, Fabio Manfredini, Thomas O’Shea-Wheller, Solenn Patalano, Christopher D. Pull, Takao Sasaki, Daisy Taylor, Christopher D.R. Wyatt, Seirian Sumner

    Social insect societies are long-standing models for understanding social behaviour and evolution. Unlike other advanced biological societies (such as the multicellular body), the component parts of social insect societies can be easily deconstructed and manipulated. Recent methodological and theoretical innovations have exploited this trait to address an expanded range of biological questions. We illustrate the broadening range of biological insight coming from social insect biology with four examples. These new frontiers promote open-minded, interdisciplinary exploration of one of the richest and most complex of biological phenomena: sociality.

    更新日期:2017-09-10
  • The Nebulous Ecology of Native Invasions
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-07
    Lloyd L. Nackley, Adam G. West, Andrew L. Skowno, William J. Bond

    In the Anthropocene, alien species are no longer the only category of biological organism establishing and rapidly spreading beyond historical boundaries. We review evidence showing that invasions by native species are a global phenomenon and present case studies from Southern Africa, and elsewhere, that reveal how climate-mediated expansions of native plants into adjacent communities can emulate the functional and structural changes associated with invasions by alien plant species. We conclude that integrating native invasions into ecological practice and theory will improve mechanistic models and better inform policy and adaptive ecological management in the 21st century.

    更新日期:2017-09-09
  • Is Reintroduction Biology an Effective Applied Science?
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-09-07
    Gemma Taylor, Stefano Canessa, Rohan H. Clarke, Dean Ingwersen, Doug P. Armstrong, Philip J. Seddon, John G. Ewen

    Reintroduction biology is a field of scientific research that aims to inform translocations of endangered species. We review two decades of published literature to evaluate whether reintroduction science is evolving in its decision-support role, as called for by advocates of evidence-based conservation. Reintroduction research increasingly addresses a priori hypotheses, but remains largely focused on short-term population establishment. Similarly, studies that directly assist decisions by explicitly comparing alternative management actions remain a minority. A small set of case studies demonstrate full integration of research in the reintroduction decision process. We encourage the use of tools that embed research in decision-making, particularly the explicit consideration of multiple management alternatives because this is the crux of any management decisions.

    更新日期:2017-09-07
  • Climates Past, Present, and Yet-to-Come Shape Climate Change Vulnerabilities
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-24
    Christopher P. Nadeau, Mark C. Urban, Jon R. Bridle

    Climate change is altering life at multiple scales, from genes to ecosystems. Predicting the vulnerability of populations to climate change is crucial to mitigate negative impacts. We suggest that regional patterns of spatial and temporal climatic variation scaled to the traits of an organism can predict where and why populations are most vulnerable to climate change. Specifically, historical climatic variation affects the sensitivity and response capacity of populations to climate change by shaping traits and the genetic variation in those traits. Present and future climatic variation can affect both climate change exposure and population responses. We provide seven predictions for how climatic variation might affect the vulnerability of populations to climate change and suggest key directions for future research.

    更新日期:2017-08-25
  • Individual Confidence-Weighting and Group Decision-Making
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-21
    James A.R. Marshall, Gavin Brown, Andrew N. Radford

    Group-living species frequently pool individual information so as to reach consensus decisions such as when and where to move, or whether a predator is present. Such opinion-pooling has been demonstrated empirically, and theoretical models have been proposed to explain why group decisions are more reliable than individual decisions. Behavioural ecology theory frequently assumes that all individuals have equal decision-making abilities, but decision theory relaxes this assumption and has been tested in human groups. We summarise relevant theory and argue for its applicability to collective animal decisions. We consider selective pressure on confidence-weighting in groups of related and unrelated individuals. We also consider which species and behaviours may provide evidence of confidence-weighting, paying particular attention to the sophisticated vocal communication of cooperative breeders.

    更新日期:2017-08-24
  • Sexual Conflict, Facultative Asexuality, and the True Paradox of Sex
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-23
    Nathan W. Burke, Russell Bonduriansky

    Theory suggests that occasional or conditional sex involving facultative switching between sexual and asexual reproduction is the optimal reproductive strategy. Therefore, the true ‘paradox of sex’ is the prevalence of obligate sex. This points to the existence of powerful, general impediments to the invasion of obligately sexual populations by facultative mutants, and recent studies raise the intriguing possibility that a key impediment could be sexual conflict. Using Bateman gradients we show that facultative asexuality can amplify sexual conflict over mating, generating strong selection for both female resistance and male coercion. We hypothesize that invasions are most likely to succeed when mutants have negative Bateman gradients, can avoid mating, and achieve high fecundity through asexual reproduction – a combination unlikely to occur in natural populations.

    更新日期:2017-08-24
  • Do Performance–Safety Tradeoffs Cause Hypometric Metabolic Scaling in Animals?
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-28
    Jon F. Harrison

    Hypometric scaling of aerobic metabolism in animals has been widely attributed to constraints on oxygen (O2) supply in larger animals, but recent findings demonstrate that O2 supply balances with need regardless of size. Larger animals also do not exhibit evidence of compensation for O2 supply limitation. Because declining metabolic rates (MRs) are tightly linked to fitness, this provides significant evidence against the hypothesis that constraints on supply drive hypometric scaling. As an alternative, ATP demand might decline in larger animals because of performance–safety tradeoffs. Larger animals, which typically reproduce later, exhibit risk-reducing strategies that lower MR. Conversely, smaller animals are more strongly selected for growth and costly neurolocomotory performance, elevating metabolism.

    更新日期:2017-08-24
  • Harnessing the Power of Genomics to Secure the Future of Seafood
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-14
    Louis Bernatchez, Maren Wellenreuther, Cristián Araneda, David T. Ashton, Julia M.I. Barth, Terry D. Beacham, Gregory E. Maes, Jann T. Martinsohn, Kristina M. Miller, Kerry A. Naish, Jennifer R. Ovenden, Craig R. Primmer, Ho Young Suk, Nina O. Therkildsen, Ruth E. Withler

    Best use of scientific knowledge is required to maintain the fundamental role of seafood in human nutrition. While it is acknowledged that genomic-based methods allow the collection of powerful data, their value to inform fisheries management, aquaculture, and biosecurity applications remains underestimated. We review genomic applications of relevance to the sustainable management of seafood resources, illustrate the benefits of, and identify barriers to their integration. We conclude that the value of genomic information towards securing the future of seafood does not need to be further demonstrated. Instead, we need immediate efforts to remove structural roadblocks and focus on ways that support integration of genomic-informed methods into management and production practices. We propose solutions to pave the way forward.

    更新日期:2017-08-24
  • Infectious Agents Trigger Trophic Cascades
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-20
    Julia C. Buck, William J. Ripple

    Most demonstrated trophic cascades originate with predators, but infectious agents can also cause top-down indirect effects in ecosystems. Here we synthesize the literature on trophic cascades initiated by infectious agents including parasitoids, pathogens, parasitic castrators, macroparasites, and trophically transmitted parasites. Like predators, infectious agents can cause density-mediated and trait-mediated indirect effects through their direct consumptive and nonconsumptive effects respectively. Unlike most predators, however, infectious agents are not fully and immediately lethal to their victims, so their consumptive effects can also trigger trait-mediated indirect effects. We find that the frequency of trophic cascades reported for different consumer types scales with consumer lethality. Furthermore, we emphasize the value of uniting predator–prey and parasite–host theory under a general consumer–resource framework.

    更新日期:2017-08-24
  • Unifying Research on Social–Ecological Resilience and Collapse
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-19
    Graeme S. Cumming, Garry D. Peterson

    Ecosystems influence human societies, leading people to manage ecosystems for human benefit. Poor environmental management can lead to reduced ecological resilience and social–ecological collapse. We review research on resilience and collapse across different systems and propose a unifying social–ecological framework based on (i) a clear definition of system identity; (ii) the use of quantitative thresholds to define collapse; (iii) relating collapse processes to system structure; and (iv) explicit comparison of alternative hypotheses and models of collapse. Analysis of 17 representative cases identified 14 mechanisms, in five classes, that explain social–ecological collapse. System structure influences the kind of collapse a system may experience. Mechanistic theories of collapse that unite structure and process can make fundamental contributions to solving global environmental problems.

    更新日期:2017-08-24
  • Symbiotic Dinoflagellate Functional Diversity Mediates Coral Survival under Ecological Crisis
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-23
    David J. Suggett, Mark E. Warner, William Leggat

    Coral reefs have entered an era of ‘ecological crisis’ as climate change drives catastrophic reef loss worldwide. Coral growth and stress susceptibility are regulated by their endosymbiotic dinoflagellates (genus Symbiodinium). The phylogenetic diversity of Symbiodinium frequently corresponds to patterns of coral health and survival, but knowledge of functional diversity is ultimately necessary to reconcile broader ecological success over space and time. We explore here functional traits underpinning the complex biology of Symbiodinium that spans free-living algae to coral endosymbionts. In doing so we propose a mechanistic framework integrating the primary traits of resource acquisition and utilisation as a means to explain Symbiodinium functional diversity and to resolve the role of Symbiodinium in driving the stability of coral reefs under an uncertain future.

    更新日期:2017-08-24
  • Cognition in Contests: Mechanisms, Ecology, and Evolution
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-17
    Michael S. Reichert, John L. Quinn

    Animal contests govern access to key resources and are a fundamental determinant of fitness within populations. Little is known about the mechanisms generating individual variation in strategic contest behavior or what this variation means for population level processes. Cognition governs the expression of behaviors during contests, most notably by linking experience gained with decision making, but its role in driving the evolutionary ecological dynamics of contests is only beginning to emerge. We review the kinds of cognitive mechanisms that underlie contest behavior, emphasize the importance of feedback loops and socio-ecological context, and suggest that contest behavior provides an ideal focus for integrative studies of phenotypic variation.

    更新日期:2017-08-24
  • Which Latitudinal Gradients for Genetic Diversity?
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-11
    Paolo Gratton, Silvio Marta, Gaëlle Bocksberger, Marten Winter, Petr Keil, Emiliano Trucchi, Hjalmar Kühl

    A recent global analysis of GenBank DNA sequences from amphibians and mammals indicated consistent poleward decrease of intraspecific genetic diversity in both classes. We highlight that this result was biased by not accounting for distance decay of similarity and reanalyse the datasets, revealing distinct latitudinal gradients in mammals and amphibians.

    更新日期:2017-08-24
  • Conservation Evo-Devo: Preserving Biodiversity by Understanding Its Origins
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-07
    Calum S. Campbell, Colin E.​ Adams, Colin W. Bean, Kevin J. Parsons

    Unprecedented rates of species extinction increase the urgency for effective conservation biology management practices. Thus, any improvements in practice are vital and we suggest that conservation can be enhanced through recent advances in evolutionary biology, specifically advances put forward by evolutionary developmental biology (i.e., evo-devo). There are strong overlapping conceptual links between conservation and evo-devo whereby both fields focus on evolutionary potential. In particular, benefits to conservation can be derived from some of the main areas of evo-devo research, namely phenotypic plasticity, modularity and integration, and mechanistic investigations of the precise developmental and genetic processes that determine phenotypes. Using examples we outline how evo-devo can expand into conservation biology, an opportunity which holds great promise for advancing both fields.

    更新日期:2017-08-24
  • Causes and Consequences of Behavioral Interference between Species
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-08-07
    Gregory F. Grether, Kathryn S. Peiman, Joseph A. Tobias, Beren W. Robinson

    Behavioral interference between species, such as territorial aggression, courtship, and mating, is widespread in animals. While aggressive and reproductive forms of interspecific interference have generally been studied separately, their many parallels and connections warrant a unified conceptual approach. Substantial evidence exists that aggressive and reproductive interference have pervasive effects on species coexistence, range limits, and evolutionary processes, including divergent and convergent forms of character displacement. Alien species invasions and climate change-induced range shifts result in novel interspecific interactions, heightening the importance of predicting the consequences of species interactions, and behavioral interference is a fundamental but neglected part of the equation. Here, we outline priorities for further theoretical and empirical research on the ecological and evolutionary consequences of behavioral interference.

    更新日期:2017-08-24
  • Reshaping Darwin’s Tree: Impact of the Symbiome
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-09
    Erin A. Tripp, Ning Zhang, Harald Schneider, Ying Huang, Gregory M. Mueller, Zhihong Hu, Max Häggblom, Debashish Bhattacharya

    Much of the undescribed biodiversity on Earth is microbial, often in mutualistic or pathogenic associations. Physically associated and coevolving life forms comprise a symbiome. We propose that systematics research can accelerate progress in science by introducing a new framework for phylogenetic analysis of symbiomes, here termed SYMPHY (symbiome phylogenetics).

    更新日期:2017-08-24
  • Biodiversity Models: What If Unsaturation Is the Rule?
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-10
    Rubén G. Mateo, Karel Mokany, Antoine Guisan

    Improving biodiversity predictions is essential if we are to meet the challenges posed by global change. As knowledge is key to feed models, we need to evaluate how debated theory can affect models. An important ongoing debate is whether environmental constraints limit the number of species that can coexist in a community (saturation), with recent findings suggesting that species richness in many communities might be unsaturated. Here, we propose that biodiversity models could address this issue by accounting for a duality: considering communities as unsaturated but where species composition is constrained by different scale-dependent biodiversity drivers. We identify a variety of promising advances for incorporating this duality into commonly applied biodiversity modelling approaches and improving their spatial predictions.

    更新日期:2017-08-24
  • Animal Social Network Theory Can Help Wildlife Conservation
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-22
    Lysanne Snijders, Daniel T. Blumstein, Christina R. Stanley, Daniel W. Franks

    Many animals preferentially associate with certain other individuals. This social structuring can influence how populations respond to changes to their environment, thus making network analysis a promising technique for understanding, predicting, and potentially manipulating population dynamics. Various network statistics can correlate with individual fitness components and key population-level processes, yet the logical role and formal application of animal social network theory for conservation and management have not been well articulated. We outline how understanding of direct and indirect relationships between animals can be profitably applied by wildlife managers and conservationists. By doing so, we aim to stimulate the development and implementation of practical tools for wildlife conservation and management and to inspire novel behavioral research in this field.

    更新日期:2017-08-24
  • Equipping the 22nd-Century Historical Ecologist
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-20
    Scott A. Morrison, T. Scott Sillett, W. Chris Funk, Cameron K. Ghalambor, Torben C. Rick

    Historical ecology provides information needed to understand contemporary conditions and make science-based resource management decisions. Gaps in historical records, however, can limit inquiries and inference. Unfortunately, the patchiness of data that poses challenges for today’s historical ecologist may be similarly problematic for those in the future seeking to understand what are currently present-day conditions and trends, in part because of societal underinvestment in systematic collection and curation. We therefore highlight the generational imperative that contemporary scientists and managers individually have – especially in this era of tremendous global change – to ensure sufficient documentation of the past and current conditions of the places and resources to which they have access.

    更新日期:2017-08-24
  • Why Sex? A Pluralist Approach Revisited
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-09
    Maurine Neiman, Curtis M. Lively, Stephanie Meirmans

    Why sexual reproduction predominates in nature remains a mystery. The mystery stems in part from the fact that many of the plausible hypotheses for sex have restrictive assumptions. Two decades ago these limitations inspired the formulation of a ‘pluralist’ approach in which standalone hypotheses for sex were considered together. Here we review representative literature to address whether this strategy has deepened our understanding of sex. We found surprisingly few papers adopting such an approach, probably reflecting challenges associated with testing multiple mechanisms. Nevertheless, these studies provided new insights, highlighting in particular the potential importance of interaction between parasites and harmful mutations. We conclude with strategies for moving forward, including broader formulations of pluralism and the application of more qualitative types of testing.

    更新日期:2017-08-24
  • Adaptive Genetic Exchange: A Tangled History of Admixture and Evolutionary Innovation
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-20
    Michael L. Arnold, Krushnamegh Kunte

    Genetic exchange between divergent evolutionary lineages, from introgressive hybridization between locally adapted populations to insertion of retroviral sequences into eukaryotic genomes, has now been documented. The detection of frequent divergence-with-gene-flow contrasts the neo-Darwinian paradigm of largely allopatric diversification. Nevertheless, of even greater significance is the growing wealth of data suggesting that the recipients of the transferred genomic material gain adaptive phenotypes from the donor lineages. This adaptive enrichment is reflected by changes in pathogenicity in viruses and bacteria, the transformation of ecological amplitude in eukaryotes, and adaptive radiations in extremely diverse lineages. Although genetic exchange may produce maladaptive consequences, most of the recently reported examples suggest increases in fitness, and many such adaptive trait transfers have been identified in our own species.

    更新日期:2017-08-24
  • The Evolutionary Consequences of Stepwise Infection Processes
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-06-22
    Matthew D. Hall, Gilberto Bento, Dieter Ebert

    Molecular and cellular studies reveal that the resistance of hosts to parasites and pathogens is a cascade-like process with multiple steps required to be passed for successful infection. By contrast, much of evolutionary reasoning is based on strongly simplified, one- or two-step infection processes with simple genetics or on resistance being a quantitative trait. Here we attempt a conceptual unification of these two perspectives with the aim of cross-fostering research and filling some of the gaps in our concepts of the ecology and evolution of disease. This conceptual unification has a profound impact on the way we understand the genetics and evolution of host resistance, ecological immunity, evolution of virulence, defence portfolios, and host–pathogen coevolution.

    更新日期:2017-08-24
  • Mutualisms Are Not on the Verge of Breakdown
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-21
    Megan E. Frederickson

    Mutualisms teeter on a knife-edge between conflict and cooperation, or so the conventional wisdom goes. The costs and benefits of mutualism often depend on the abiotic or biotic context in which an interaction occurs, and experimental manipulations can induce shifts in interaction outcomes from mutualism all the way to parasitism. Yet, research suggests that mutualisms rarely turn parasitic in nature. Similarly, despite the potential for ‘cheating’ to undermine mutualism evolution, empirical evidence for fitness conflicts between partners and, thus, selection for cheating in mutualisms is scant. Furthermore, mutualism seldom leads to parasitism at macroevolutionary timescales. Thus, I argue here that mutualisms do not deserve their reputation for ecological and evolutionary instability, and are not on the verge of breakdown.

    更新日期:2017-08-24
  • Publishing with Objective Charisma: Breaking Science’s Paradox
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-07-19
    Zoë A. Doubleday, Sean D. Connell

    Good writing takes time, but in a research environment where speed is master, is it a superfluous pursuit? Scientists spend most of their working life writing, yet our writing style obstructs its key purpose: communication. We advocate more accessible prose that boosts the influence of our publications. For those who change, the proof of their success will be science that is read, understood, and remembered.

    更新日期:2017-08-24
  • Next-Generation Global Biomonitoring: Large-scale, Automated Reconstruction of Ecological Networks
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-03-27
    David A. Bohan, Corinne Vacher, Alireza Tamaddoni-Nezhad, Alan Raybould, Alex J. Dumbrell, Guy Woodward

    We foresee a new global-scale, ecological approach to biomonitoring emerging within the next decade that can detect ecosystem change accurately, cheaply, and generically. Next-generation sequencing of DNA sampled from the Earth’s environments would provide data for the relative abundance of operational taxonomic units or ecological functions. Machine-learning methods would then be used to reconstruct the ecological networks of interactions implicit in the raw NGS data. Ultimately, we envision the development of autonomous samplers that would sample nucleic acids and upload NGS sequence data to the cloud for network reconstruction. Large numbers of these samplers, in a global array, would allow sensitive automated biomonitoring of the Earth’s major ecosystems at high spatial and temporal resolution, revolutionising our understanding of ecosystem change.

    更新日期:2017-08-24
  • Integrating Biogeography with Contemporary Niche Theory
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-05-03
    William Godsoe, Jill Jankowski, Robert D. Holt, Dominique Gravel

    There is no consensus on when biotic interactions impact the range limits of species. Starting from MacArthur’s use of invasibility to understand how biotic interactions influence coexistence, here we examine how biotic interactions shape species distributions. Range limits emerge from how birth, death, and movement rates vary with the environment. We clarify some basic issues revolving around niche definitions, illustrated with simple resource–consumer theory. We then highlight two different avenues for linking community theory and range theory; the first based on calculating the effects of biotic interactions on range limits across scales and landscape configurations, and the second based on aggregate measures of diffuse interactions and network strength. We conclude with suggestions for a future research agenda.

    更新日期:2017-08-24
  • Why Finance Should Care about Ecology
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-04-27
    Bert Scholtens

    Finance ignores ecosystems, which has resulted in a growing list of environmental and social problems. In this article, the importance of ecology for finance is assessed. We suggest The piece also suggests that the financial intermediation perspective can align finance and ecology for the benefit of society. This requires that financial institutions account for information about the impact of finance on the environment and vice versa, and that they are held accountable by their supervisors in this domain.

    更新日期:2017-08-24
  • Revisiting Adaptive Potential, Population Size, and Conservation
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-05-02
    Ary A. Hoffmann, Carla M. Sgrò, Torsten N. Kristensen

    Additive genetic variance (VA) reflects the potential for evolutionary shifts and can be low for some traits or populations. High VA is critical for the conservation of threatened species under selection to facilitate adaptation. Theory predicts tight associations between population size and VA, but data from some experimental models, and managed and natural populations do not always support this prediction. However, VA comparisons often have low statistical power, are undertaken in highly controlled environments distinct from natural habitats, and focus on traits with limited ecological relevance. Moreover, investigations of VA typically fail to consider rare alleles, genetic load, or linkage disequilibrium, resulting in deleterious effects associated with favored alleles in small populations. Large population size remains essential for ensuring adaptation.

    更新日期:2017-08-24
  • Ecology of Problem Individuals and the Efficacy of Selective Wildlife Management
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-05-18
    George J.F. Swan, Steve M. Redpath, Stuart Bearhop, Robbie A. McDonald

    As a result of ecological and social drivers, the management of problems caused by wildlife is becoming more selective, often targeting specific animals. Narrowing the sights of management relies upon the ecology of certain ‘problem individuals’ and their disproportionate contribution to impacts upon human interests. We assess the ecological evidence for problem individuals and confirm that some individuals or classes can be both disproportionately responsible and more likely to reoffend. The benefits of management can sometimes be short-lived, and selective management can affect tolerance of wildlife for better or worse, but, when effectively targeted, selective management can bring benefits by mitigating impact and conflict, often in a more socially acceptable way.

    更新日期:2017-08-24
  • Old Plants, New Tricks: Phenological Research Using Herbarium Specimens
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-04-29
    Charles G. Willis, Elizabeth R. Ellwood, Richard B. Primack, Charles C. Davis, Katelin D. Pearson, Amanda S. Gallinat, Jenn M. Yost, Gil Nelson, Susan J. Mazer, Natalie L. Rossington, Tim H. Sparks, Pamela S. Soltis

    The timing of phenological events, such as leaf-out and flowering, strongly influence plant success and their study is vital to understanding how plants will respond to climate change. Phenological research, however, is often limited by the temporal, geographic, or phylogenetic scope of available data. Hundreds of millions of plant specimens in herbaria worldwide offer a potential solution to this problem, especially as digitization efforts drastically improve access to collections. Herbarium specimens represent snapshots of phenological events and have been reliably used to characterize phenological responses to climate. We review the current state of herbarium-based phenological research, identify potential biases and limitations in the collection, digitization, and interpretation of specimen data, and discuss future opportunities for phenological investigations using herbarium specimens.

    更新日期:2017-08-24
  • Graham H. Pyke: Sustainability for Humanity: It’s Time To Preach Beyond the Converted
    Trends Ecol. Evol. (IF 15.268) Pub Date : 2017-05-02

    Researchers seeking to increase awareness and action regarding sustainability issues have been overly preaching to relatively small congregations of the already converted, rather than delivering their messages more broadly, thus contributing to a growing mismatch between public opinion and sustainability science. I present suggestions for how we can remedy this and seek your increasing involvement.

    更新日期:2017-08-24
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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