Journal of Animal Ecology

Cover image for Vol. 84 Issue 2

Early View (Online Version of Record published before inclusion in an issue)

Edited By: Ken Wilson, Tim Coulson, Jean-Michel Gaillard and Ben Sheldon

Impact Factor: 4.726

ISI Journal Citation Reports © Ranking: 2013: 1/153 (Zoology); 21/141 (Ecology)

Online ISSN: 1365-2656

Associated Title(s): Functional Ecology, Journal of Applied Ecology, Journal of Ecology, Methods in Ecology and Evolution

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  1. Standard Papers

    1. You have full text access to this OnlineOpen article
      Demographic mechanisms of inbreeding adjustment through extra-pair reproduction

      Jane M. Reid, A. Bradley Duthie, Matthew E. Wolak and Peter Arcese

      Article first published online: 24 FEB 2015 | DOI: 10.1111/1365-2656.12340

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      The authors propose three general demographic processes that could potentially cause mean coefficient of inbreeding to differ between females' extra-pair and within-pair offspring given random extra-pair reproduction with available males, without necessarily requiring explicit kin discrimination. They then quantify these three processes using long-term pedigree and pairing data from song sparrows.

    2. Non-additive effects of intra- and interspecific competition between two larval salamanders

      Thomas L. Anderson and Howard H. Whiteman

      Article first published online: 24 FEB 2015 | DOI: 10.1111/1365-2656.12335

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      Non-additive effects often occur among interspecific competitors, yet whether such effects can arise between intra- and interspecific competition is unclear. The authors study highlights that non-additive effects can exist between intra- and interspecific competitors, but are often less than the strength of each type of competition alone.

    3. Infectious disease transmission and behavioural allometry in wild mammals

      Barbara A. Han, Andrew W. Park, Anna E. Jolles and Sonia Altizer

      Article first published online: 24 FEB 2015 | DOI: 10.1111/1365-2656.12336

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      Estimating pathogen transmission rates is challenging, but host behaviors underlying transmission can vary predictably with body size, one of the best-studied traits in animals. The authors find that sociality in large mammals and ranging intensity in small mammals can increase the risk of invasion by micro- and macroparasites, respectively.

    4. Climate niche differentiation between two passerines despite ongoing gene flow

      Pei-Jen L. Shaner, Tzu-Hsuan Tsao, Rong-Chien Lin, Wei Liang, Chia-Fen Yeh, Xiao-Jun Yang, Fu-Min Lei, Fang Zhou, Can-Chao Yang, Le Manh Hung, Yu-Cheng Hsu and Shou-Hsien Li

      Article first published online: 12 FEB 2015 | DOI: 10.1111/1365-2656.12331

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      This study provides an empirical case demonstrating that climate niches may not be homogenized in nascent species in spite of substantial, ongoing gene flow, which in turn suggests a role for ecology in promoting and maintaining diversification among incipient species.

    5. Life-stage-specific physiology defines invasion extent of a riverine fish

      David J. Lawrence, David A. Beauchamp and Julian D. Olden

      Article first published online: 6 FEB 2015 | DOI: 10.1111/1365-2656.12332

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      By combining field observations with mechanistic modelling, Lawrence et al. provide a physiological basis to understand distributional constraints in the non-native aquatic ectotherm, smallmouth bass. Their results demonstrate that life-stage specific effects of temperature on bass physiology ultimately create a barrier to range expansion of this fish in temperate rivers.

    6. Host life history and host–parasite syntopy predict behavioural resistance and tolerance of parasites

      Brittany F. Sears, Paul W. Snyder and Jason R. Rohr

      Article first published online: 4 FEB 2015 | DOI: 10.1111/1365-2656.12333

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      Here the authors show that tadpole pace-of-life was a significant positive predictor of behavioral resistance and negative predictor of tolerance, a result that is consistent with a trade-off between these defenses across species and host pace-of-life and host-parasite syntopy being powerful drivers of both the strength and type of host defense strategies against parasites.

    7. Larval melanism in a geometrid moth: promoted neither by a thermal nor seasonal adaptation but desiccating environments

      Panu Välimäki, Sami M. Kivelä, Jani Raitanen, Veli-Matti Pakanen, Emma Vatka, Maarit I. Mäenpää, Netta Keret and Toomas Tammaru

      Article first published online: 4 FEB 2015 | DOI: 10.1111/1365-2656.12330

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      Spatio-temporal variation in the degree of melanisation is often considered in the context of thermal adaptation. The authors tested various predictions of the thermal melanism hypothesis in a series of complementary laboratory experiments to identify the causal selective factors affecting morph induction, which often remain ambiguous in among-population comparisons due environmental covariances.

    8. Social integration confers thermal benefits in a gregarious primate

      Richard McFarland, Andrea Fuller, Robyn S. Hetem, Duncan Mitchell, Shane K. Maloney, S. Peter Henzi and Louise Barrett

      Article first published online: 30 JAN 2015 | DOI: 10.1111/1365-2656.12329

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      The authors used state-of-the-art biologging technology to measure the core body temperature of a wild primate, and are the first to combine these measures with detailed records of behaviour. This combination of direct physiological, behavioural and environmental measurement has allowed the authors to identify the cold as an important non-social stressor.

    9. Effects of temperature on consumer–resource interactions

      Priyanga Amarasekare

      Article first published online: 14 JAN 2015 | DOI: 10.1111/1365-2656.12320

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      Understanding how temperature variation influences consumer–resource interactions (e.g. predator–prey, plant–herbivore, host–parasite) is an important research priority. Previous work on this topic has yielded conflicting outcomes, with some studies predicting that warming should increase consumer–resource oscillations and others predicting that warming should decrease consumer–resource oscillations. Here, the author develops a consumer–resource model that both synthesizes previous findings in a common framework and yields novel insights about temperature effects on consumer–resource interactions

    10. Weather-driven dynamics in a dual-migrant system: moths and bats

      Jennifer J. Krauel, John K. Westbrook and Gary F. McCracken

      Article first published online: 10 JAN 2015 | DOI: 10.1111/1365-2656.12327

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      The authors present evidence for return migrations in pest moths, and show clear links between migratory behaviours in a predator-prey system; both are rarely studied areas in migration ecology. Understanding the weather systems underlying these migrations is important to predicting results of long-term climate change on these ecological processes.

    11. The effects of experimental warming on the timing of a plant–insect herbivore interaction

      Heather M. Kharouba, Mark Vellend, Rana M. Sarfraz and Judith H. Myers

      Article first published online: 9 JAN 2015 | DOI: 10.1111/1365-2656.12328

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      This is the first study to experimentally compare the direct effects of warming on individual performance to those effects mediated by warming-driven phenological shifts. The authors found that warming advanced the timing of larval but not leaf emergence and that warming had no net effect on insect performance.

    12. You have full text access to this OnlineOpen article
      Concomitant predation on parasites is highly variable but constrains the ways in which parasites contribute to food web structure

      Alyssa R. Cirtwill and Daniel B. Stouffer

      Article first published online: 8 JAN 2015 | DOI: 10.1111/1365-2656.12323

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      The authors use a novel species- and link-centred perspective to relate network-level consequences of adding parasites to food-webs to the effects of concomitant predation on the roles of parasites. Concomitant predation not only induces parasites to have unique structural roles, it reduces the redundancy of parasites' contributions to food-web structure.

    13. Predicting rates of isotopic turnover across the animal kingdom: a synthesis of existing data

      Stephen M. Thomas and Thomas W. Crowther

      Article first published online: 8 JAN 2015 | DOI: 10.1111/1365-2656.12326

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      The stable isotopes of carbon and nitrogen represent powerful tools in food-web ecology, providing a wide range of dietary information in animal consumers. However, identifying the temporal window over which a consumer's isotopic signature reflects its diet requires an understanding of elemental incorporation. This paper is the first to show empirically how body size and temperature are the major drivers of this process.

    14. Cruising the rain forest floor: butterfly wing shape evolution and gliding in ground effect

      Ann Cespedes, Carla M. Penz and Philip J. DeVries

      Article first published online: 7 JAN 2015 | DOI: 10.1111/1365-2656.12325

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      Forewing shapes in rain forest understory butterflies fall into two categories corresponding to flight behaviour and vertical flight environment. Field observations and morphometric analyses indicate most Haeterini butterflies glide in ground effect while distant relatives employ flapping flight. Flight behaviour has likely driven diversity of wing morphology in these butterflies.

    15. ‘Trophic whales’ as biotic buffers: weak interactions stabilize ecosystems against nutrient enrichment

      Florian Schwarzmüller, Nico Eisenhauer and Ulrich Brose

      Article first published online: 29 DEC 2014 | DOI: 10.1111/1365-2656.12324

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      Natural ecosystems inherit structural components that buffer against external stressors such as nutrient enrichment. In this study, the authors provide methods for a-priori identification of one class of structural important species, the ‘trophic whales’. They examine their role in exemplary model analyses and test the concept empirically in a microcosm experiment.

    16. You have full text access to this OnlineOpen article
      Density- and trait-mediated effects of a parasite and a predator in a tri-trophic food web

      Aabir Banerji, Alison B. Duncan, Joanne S. Griffin, Stuart Humphries, Owen L. Petchey and Oliver Kaltz

      Article first published online: 29 DEC 2014 | DOI: 10.1111/1365-2656.12317

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      The authors have used a classic system to gain new insights into how a single-host parasite can alter interactions between the host, the host's predator, and the host's prey over time.

    17. Top-down and bottom-up forces interact at thermal range extremes on American lobster

      Stephanie A. Boudreau, Sean C. Anderson and Boris Worm

      Article first published online: 26 DEC 2014 | DOI: 10.1111/1365-2656.12322

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      This study explores competing hypotheses to explain variation in American lobster abundance along a strong thermal gradient. The results provide support of both top-down (predator release) and bottom-up (large-scale climate) regulation of lobster abundance in the NW Atlantic, with evidence being strongest at the edges of the range. (Photo by S.C. Anderson)

    18. Different foraging preferences of hummingbirds on artificial and natural flowers reveal mechanisms structuring plant–pollinator interactions

      María A. Maglianesi, Katrin Böhning-Gaese and Matthias Schleuning

      Article first published online: 17 DEC 2014 | DOI: 10.1111/1365-2656.12319

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      Morphological constraints are one important mechanism structuring trophic networks, albeit other factors, such as competition, additionally define interaction niches of consumer species in real–world communities. Experimental and observational approaches are essential for a comprehensive understanding of the causes determining patterns of interactions in plant–pollinator networks.

    19. Density-dependent movement and the consequences of the Allee effect in the model organism Tetrahymena

      Emanuel A. Fronhofer, Tabea Kropf and Florian Altermatt

      Article first published online: 17 DEC 2014 | DOI: 10.1111/1365-2656.12315

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      Movement is a key process influencing ecological and evolutionary dynamics. Importantly, movement may be plastic. The authors analysed the functional relationship between population density and movement using microcosm experiments. The authors show that density-dependent movement exhibits a fundamentally u-shaped relationship in species harbouring an Allee effect.

    20. Age-dependent trait variation: the relative contribution of within-individual change, selective appearance and disappearance in a long-lived seabird

      He Zhang, Oscar Vedder, Peter H. Becker and Sandra Bouwhuis

      Article first published online: 16 DEC 2014 | DOI: 10.1111/1365-2656.12321

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      The authors compare two methods to attribute age-dependent variation in seven phenological and reproductive traits to within-individual change (improvement, senescence, terminal effects) and/or selective (dis)appearance of certain phenotypes among older age classes, in a long-lived seabird, the common tern (Sterna hirundo). Both methods identify within-individual change as the main process underlying improvement with age in six out of seven traits, but while the decomposition method is ideal for visualising processes underlying population change in performance from one age class to the next, a mixed-modelling method is required to investigate the significance and relative contribution of age-effects.

    21. Untangling human and environmental effects on geographical gradients of mammal species richness: a global and regional evaluation

      Erik Joaquín Torres-Romero and Miguel Á. Olalla-Tárraga

      Article first published online: 16 DEC 2014 | DOI: 10.1111/1365-2656.12313

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      Human impacts coupled with climatic variation drive the geographic variation in mammal richness in the Palearctic, Nearctic and Oriental regions. Using a human accessibility variable the authors show for the first time that the zones most accessible to humans are often those where lower mammal species richness is found.

    22. Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor

      Ivar Herfindal, Martijn van de Pol, Jan T. Nielsen, Bernt-Erik Sæther and Anders P. Møller

      Article first published online: 10 DEC 2014 | DOI: 10.1111/1365-2656.12318

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      This article demonstrates how climate early in life can have long-lasting effects on lifetime fitness of goshawks. Climate also had short-term effects on reproductive performance, and these effects were in the opposite direction compared to the long-term effects. This causes negative co-variations between the immediate and delayed responses to climate.

    23. You have full text access to this OnlineOpen article
      Adult acclimation to combined temperature and pH stressors significantly enhances reproductive outcomes compared to short-term exposures

      Coleen C. Suckling, Melody S. Clark, Joelle Richard, Simon A. Morley, Michael A. S. Thorne, Elizabeth M. Harper and Lloyd S. Peck

      Article first published online: 9 DEC 2014 | DOI: 10.1111/1365-2656.12316

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      This paper shows that acclimation to altered pH takes up to 8 months in Antarctic sea urchins and also that gonads matured for their full development time (2 years) in altered pH significantly enhances reproductive outcomes compared to short term exposures.

    24. Rat eradication and the resistance and resilience of passerine bird assemblages in the Falkland Islands

      Michael A. Tabak, Sally Poncet, Ken Passfield, Jacob R. Goheen and Carlos Martinez del Rio

      Article first published online: 3 DEC 2014 | DOI: 10.1111/1365-2656.12312

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      Rat eradications are an effective means of restoring passerine bird diversity in the Falkland Islands. However, the recovery in diversity is not accompanied by a recovery in community structure. These results suggest that diversity is resilient, while community structure is not.

    25. You have full text access to this OnlineOpen article
      Age and sex-selective predation moderate the overall impact of predators

      Sarah R. Hoy, Steve J. Petty, Alexandre Millon, D. Philip Whitfield, Michael Marquiss, Martin Davison and Xavier Lambin

      Article first published online: 3 DEC 2014 | DOI: 10.1111/1365-2656.12310

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      This study revealed superpredation was age and sex-selective and suggests that selective predation of individuals with a low reproductive value may mitigate the overall impact of predators on prey population dynamics. Consequently, accounting for type of selective predation occurring is likely to improve predictions of the overall impact of predation.

    26. Land-use history alters contemporary insect herbivore community composition and decouples plant–herbivore relationships

      Philip G. Hahn and John L. Orrock

      Article first published online: 23 NOV 2014 | DOI: 10.1111/1365-2656.12311

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      This paper highlights how agricultural land-use legacies can decouple otherwise well-established relationships between plant productivity and herbivore abundance. These results suggest that management efforts should consider the role of historic land use on herbivore assemblages, in addition to plant communities

  2. Special Feature: Stuck In Motion? Reconnecting Questions And Tools In Movement Ecology

    1. ‘You shall not pass!’: quantifying barrier permeability and proximity avoidance by animals

      Hawthorne L. Beyer, Eliezer Gurarie, Luca Börger, Manuela Panzacchi, Mathieu Basille, Ivar Herfindal, Bram Van Moorter, Subhash R. Lele and Jason Matthiopoulos

      Article first published online: 25 AUG 2014 | DOI: 10.1111/1365-2656.12275

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      Here, the authors develop a framework for simultaneously quantifying the effects of habitat preference, barrier permeability and intrinsic movement ability on space use, based on a time series of telemetry locations. This approach provides insight into the effects of barriers on animal distribution and movement.

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