1
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Laskowski KL, Alirangues Nuñez MM, Hilt S, Gessner MO, Mehner T. Predator Group Composition Indirectly Influences Food Web Dynamics through Predator Growth Rates. Am Nat 2022; 199:330-344. [DOI: 10.1086/717812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kate L. Laskowski
- Department of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
- Department of Evolution and Ecology, University of California, Davis, California 95616
| | - Marta M. Alirangues Nuñez
- Department of Ecosystem Research, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
| | - Sabine Hilt
- Department of Ecosystem Research, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
| | - Mark O. Gessner
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775 Stechlin, Germany; and Department of Ecology, Berlin Institute of Technology, Ernst-Reuter-Platz 1, 10587 Berlin, Germany
| | - Thomas Mehner
- Department of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
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2
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Nguyen VAT, Vural DC. Theoretical guidelines for editing ecological communities. J Theor Biol 2021; 534:110945. [PMID: 34717935 DOI: 10.1016/j.jtbi.2021.110945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 11/18/2022]
Abstract
Having control over species abundances and community resilience is of great interest for experimental, agricultural, industrial and conservation purposes. Here, we theoretically explore the possibility of manipulating ecological communities by modifying pairwise interactions. Specifically, we establish which interaction values should be modified, and by how much, in order to alter the composition or resilience of a community towards a favorable direction. While doing so, we also take into account the experimental difficulties in making such modifications by including in our optimization process, a cost parameter, which penalizes large modifications. In addition to prescribing what changes should be made to interspecies interactions given some modification cost, our approach also serves to establish the limits of community control, i.e. how well can one approach an ecological goal at best, even when not constrained by cost.
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Affiliation(s)
- Vu A T Nguyen
- University of Notre Dame, South Bend, IN, United States
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3
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Moore SJ, Nicholson KE. Beneath the Leaf-Litter: Can Salamander Personality Influence Forest-Floor Dynamics? HERPETOLOGICA 2021. [DOI: 10.1655/herpetologica-d-19-00019.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Shaundon J.B. Moore
- Department of Biology, Central Michigan University, Mt. Pleasant, MI 48859, USA
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4
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Invasion of cane toads (Rhinella marina) affects the problem-solving performance of vulnerable predators (monitor lizards, Varanus varius). Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-02978-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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5
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Kitchen AJ, Chalcraft DR. An individual's propensity to disperse is dependent on the behavioral type of its peers but not its own behavioral type. Oecologia 2020; 194:403-413. [PMID: 32980881 DOI: 10.1007/s00442-020-04769-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 09/21/2020] [Indexed: 10/23/2022]
Abstract
Intraspecific differences in the dispersal propensity of animals have been linked to interindividual variation in inherent tendencies (i.e., personality or behavioral type) that influence multiple aspects of an individual's behavior. Studies linking dispersal propensity and personality often (1) focus on defining behavioral tendencies with a single behavioral trait rather than multiple, (2) do not recognize that invertebrates may have behavioral tendencies that influence dispersal, and (3) do not consider how the behavioral type of other individuals affects the dispersal propensity of an individual. We documented multiple foraging behaviors of an aquatic predatory insect (Notonecta irrorata) and found that Notonecta individuals differ in their inherent behavioral tendency (i.e., degree of boldness); all foraging behaviors were correlated such that riskier behaviors were exhibited by the same individuals. We conducted an experiment in which we varied which behavioral types of Notonecta were placed in outdoor pools (passive, bold or both types present) and quantified how long it took for individuals to disperse. Passive and bold individuals had a similar propensity to disperse but the dispersal propensity of each behavioral type was influenced by the behavioral type of other conspecifics present in the pool. Our work reveals that (1) invertebrates have inherent behavioral tendencies that vary among individuals but these tendencies do not necessarily impact all of the behavior displayed by the individual (i.e., impact foraging but not dispersal) and (2) the inherent behavioral tendency of other individuals with which an animal co-occurs can affect habitat patch dynamics such as predation, competition, or colonization.
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Affiliation(s)
- Anthony J Kitchen
- Department of Biology, East Carolina University, Greenville, NC, 27858, USA
| | - David R Chalcraft
- Department of Biology, East Carolina University, Greenville, NC, 27858, USA.
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6
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Sentis A, Bertram R, Dardenne N, Simon JC, Magro A, Pujol B, Danchin E, Hemptinne JL. Intraspecific difference among herbivore lineages and their host-plant specialization drive the strength of trophic cascades. Ecol Lett 2020; 23:1242-1251. [PMID: 32394585 DOI: 10.1111/ele.13528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/08/2020] [Accepted: 04/10/2020] [Indexed: 11/29/2022]
Abstract
Trophic cascades - the indirect effect of predators on non-adjacent lower trophic levels - are important drivers of the structure and dynamics of ecological communities. However, the influence of intraspecific trait variation on the strength of trophic cascade remains largely unexplored, which limits our understanding of the mechanisms underlying ecological networks. Here we experimentally investigated how intraspecific difference among herbivore lineages specialized on different host plants influences trophic cascade strength in a terrestrial tri-trophic system. We found that the occurrence and strength of the trophic cascade are strongly influenced by herbivores' lineage and host-plant specialization but are not associated with density-dependent effects mediated by the growth rate of herbivore populations. Our findings stress the importance of intraspecific heterogeneities and evolutionary specialization as drivers of trophic cascade strength and underline that intraspecific variation should not be overlooked to decipher the joint influence of evolutionary and ecological factors on the functioning of multi-trophic interactions.
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Affiliation(s)
- Arnaud Sentis
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France.,UMR RECOVER, INRAE, Aix Marseille Univ, Aix-en-Provence, France
| | - Raphaël Bertram
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France
| | - Nathalie Dardenne
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France
| | | | - Alexandra Magro
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France
| | - Benoit Pujol
- PSL Université Paris: EPHE-UPVD-CNRS, USR, 3278 CRIOBE, Uni. Perpignan, France
| | - Etienne Danchin
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France
| | - Jean-Louis Hemptinne
- UMR-5174, EDB, CNRS, Université Toulouse III-Paul Sabatier, IRD, Toulouse, France
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7
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Contolini GM, Reid K, Palkovacs EP. Climate shapes population variation in dogwhelk predation on foundational mussels. Oecologia 2020; 192:553-564. [PMID: 31932922 DOI: 10.1007/s00442-019-04591-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 12/30/2019] [Indexed: 11/25/2022]
Abstract
Trait variation among populations is important for shaping ecological dynamics. In marine intertidal systems, seawater temperature, low tide emersion temperature, and pH can drive variation in traits and affect species interactions. In western North America, Nucella dogwhelks are intertidal drilling predators of the habitat-forming mussel Mytilus californianus. Nucella exhibit local adaptation, but it is not known to what extent environmental factors and genetic structure contribute to variation in prey selectivity among populations. We surveyed drilled mussels at sites across Oregon and California, USA, and used multiple regression and Mantel tests to test the effects of abiotic factors and Nucella neutral genetic relatedness on the size of mussels drilled across sites. Our results show that Nucella at sites characterized by higher and less variable temperature and pH drilled larger mussels. Warmer temperatures appear to induce faster handling time, and more stable pH conditions may prolong opportunities for active foraging by reducing exposure to repeated stressful conditions. In contrast, there was no significant effect of genetic relatedness on prey size selectivity. Our results emphasize the role of climate in shaping marine predator selectivity on a foundation species. As coastal climates change, predator traits will respond to localized environmental conditions, changing ecological interactions.
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Affiliation(s)
- Gina M Contolini
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 130 McAllister Way, Santa Cruz, CA, 95060, USA.
| | - Kerry Reid
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 130 McAllister Way, Santa Cruz, CA, 95060, USA
| | - Eric P Palkovacs
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 130 McAllister Way, Santa Cruz, CA, 95060, USA
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8
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Davenport JM, King AB, Riley AW, Hampson ME, Constantinides P. The non‐consumptive effects of predators and personality on prey growth and mortality. Ethology 2019. [DOI: 10.1111/eth.12981] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jon M. Davenport
- Department of Biology Southeast Missouri State University Cape Girardeau MO USA
| | - Alexis B. King
- Department of Biology Southeast Missouri State University Cape Girardeau MO USA
| | - Alex W. Riley
- Department of Biology Southeast Missouri State University Cape Girardeau MO USA
| | - Maria E. Hampson
- Department of Biology Southeast Missouri State University Cape Girardeau MO USA
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9
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Harding HR, Gordon TAC, Eastcott E, Simpson SD, Radford AN. Causes and consequences of intraspecific variation in animal responses to anthropogenic noise. Behav Ecol 2019; 30:1501-1511. [PMID: 31723315 PMCID: PMC6838653 DOI: 10.1093/beheco/arz114] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 06/07/2019] [Accepted: 06/16/2019] [Indexed: 12/24/2022] Open
Abstract
Anthropogenic noise is a recognized global pollutant, affecting a wide range of nonhuman animals. However, most research considers only whether noise pollution has an impact, ignoring that individuals within a species or population exhibit substantial variation in responses to stress. Here, we first outline how intrinsic characteristics (e.g., body size, condition, sex, and personality) and extrinsic factors (e.g., environmental context, repeated exposure, prior experience, and multiple stressors) can affect responses to environmental stressors. We then present the results of a systematic search of the anthropogenic-noise literature, identifying articles that investigated intraspecific variation in the responses of nonhuman animals to noise. This reveals that fewer than 10% of articles (51 of 589) examining impacts of noise test experimentally for intraspecific variation in responses; of those that do, more than 75% report significant effects. We assess these existing studies to determine the current scope of research and findings to-date, and to provide suggestions for good practice in the design, implementation, and reporting of robust experiments in this field. We close by explaining how understanding intraspecific variation in responses to anthropogenic noise is crucial for improving how we manage captive animals, monitor wild populations, model species responses, and mitigate effects of noise pollution on wildlife. Our aim is to stimulate greater knowledge and more effective management of the harmful consequences of this global pollutant.
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Affiliation(s)
- Harry R Harding
- School of Biological Sciences, University of Bristol, Bristol, UK
- Marine Scotland Science, Aberdeen, UK
| | - Timothy A C Gordon
- Biosciences, College of Life & Environmental Sciences, University of Exeter, Exeter, UK
- Australian Institute of Marine Science, Perth, WA, Australia
| | - Emma Eastcott
- School of Biological Sciences, University of Bristol, Bristol, UK
| | - Stephen D Simpson
- Biosciences, College of Life & Environmental Sciences, University of Exeter, Exeter, UK
| | - Andrew N Radford
- School of Biological Sciences, University of Bristol, Bristol, UK
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10
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Start D, Gilbert B. Trait variation across biological scales shapes community structure and ecosystem function. Ecology 2019; 100:e02769. [PMID: 31162633 DOI: 10.1002/ecy.2769] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 04/03/2019] [Accepted: 04/25/2019] [Indexed: 11/07/2022]
Abstract
Trait variation underlies our understanding of the patterns and importance of biodiversity, yet we have a poor understanding of how variation at different levels of biological organization structures communities and ecosystems. Here, we use a mesocosm experiment to test for the effects of a larval dragonfly functional trait on community and ecosystem dynamics by creating artificial populations to mirror within- and between-population trait variation observed in our study area. Specifically, we manipulate variation in activity rate, a key functional trait shaping food webs, across three levels of biological organization: within-populations (differences in trait variation in a population), among-populations (differences in population mean trait values), and among-species (species-level differences of co-occurring dragonflies). We show that differences in activity rate alter prey communities, trophic cascades, and multiple ecosystem processes. However, trait variation among populations had much larger effects than differences between co-occurring species or even the presence of a predator, whereas within-population variation had a relatively minor impact. Interestingly, combined with earlier work in the same system, our study suggests that the relative importance of species vs. individual level differences for ecosystem functioning will depend on the spatial scale considered. Ecological processes, including biodiversity-ecosystem-functioning relationships, cannot be understood without accounting for trait variation across biological scales of organization, including at fine scales.
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Affiliation(s)
- Denon Start
- Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, M5S3B2, Canada
| | - Benjamin Gilbert
- Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, M5S3B2, Canada
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11
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Gomes E, Desouhant E, Amat I. Evidence for risk-taking behavioural types and potential effects on resource acquisition in a parasitoid wasp. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2019.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Wong MKL, Guénard B, Lewis OT. Trait-based ecology of terrestrial arthropods. Biol Rev Camb Philos Soc 2019; 94:999-1022. [PMID: 30548743 PMCID: PMC6849530 DOI: 10.1111/brv.12488] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 11/21/2018] [Accepted: 11/23/2018] [Indexed: 12/11/2022]
Abstract
In focusing on how organisms' generalizable functional properties (traits) interact mechanistically with environments across spatial scales and levels of biological organization, trait-based approaches provide a powerful framework for attaining synthesis, generality and prediction. Trait-based research has considerably improved understanding of the assembly, structure and functioning of plant communities. Further advances in ecology may be achieved by exploring the trait-environment relationships of non-sessile, heterotrophic organisms such as terrestrial arthropods, which are geographically ubiquitous, ecologically diverse, and often important functional components of ecosystems. Trait-based studies and trait databases have recently been compiled for groups such as ants, bees, beetles, butterflies, spiders and many others; however, the explicit justification, conceptual framework, and primary-evidence base for the burgeoning field of 'terrestrial arthropod trait-based ecology' have not been well established. Consequently, there is some confusion over the scope and relevance of this field, as well as a tendency for studies to overlook important assumptions of the trait-based approach. Here we aim to provide a broad and accessible overview of the trait-based ecology of terrestrial arthropods. We first define and illustrate foundational concepts in trait-based ecology with respect to terrestrial arthropods, and justify the application of trait-based approaches to the study of their ecology. Next, we review studies in community ecology where trait-based approaches have been used to elucidate how assembly processes for terrestrial arthropod communities are influenced by niche filtering along environmental gradients (e.g. climatic, structural, and land-use gradients) and by abiotic and biotic disturbances (e.g. fire, floods, and biological invasions). We also review studies in ecosystem ecology where trait-based approaches have been used to investigate biodiversity-ecosystem function relationships: how the functional diversity of arthropod communities relates to a host of ecosystem functions and services that they mediate, such as decomposition, pollination and predation. We then suggest how future work can address fundamental assumptions and limitations by investigating trait functionality and the effects of intraspecific variation, assessing the potential for sampling methods to bias the traits and trait values observed, and enhancing the quality and consolidation of trait information in databases. A roadmap to guide observational trait-based studies is also presented. Lastly, we highlight new areas where trait-based studies on terrestrial arthropods are well positioned to advance ecological understanding and application. These include examining the roles of competitive, non-competitive and (multi-)trophic interactions in shaping coexistence, and macro-scaling trait-environment relationships to explain and predict patterns in biodiversity and ecosystem functions across space and time. We hope this review will spur and guide future applications of the trait-based framework to advance ecological insights from the most diverse eukaryotic organisms on Earth.
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Affiliation(s)
- Mark K. L. Wong
- Department of ZoologyUniversity of OxfordOxford, OX1 3PSU.K.
| | - Benoit Guénard
- School of Biological SciencesThe University of Hong Kong, Kadoorie Biological Sciences BuildingHong KongSARChina
| | - Owen T. Lewis
- Department of ZoologyUniversity of OxfordOxford, OX1 3PSU.K.
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13
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Lichtenstein JLL, Daniel KA, Wong JB, Wright CM, Doering GN, Costa-Pereira R, Pruitt JN. Habitat structure changes the relationships between predator behavior, prey behavior, and prey survival rates. Oecologia 2019; 190:297-308. [PMID: 30707296 DOI: 10.1007/s00442-019-04344-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 01/22/2019] [Indexed: 02/05/2023]
Abstract
The individual behavioral traits of predators and prey sometimes determine the outcome of their interactions. Here, we examine whether changes to habitat complexity alter the effects of predator and prey behavior on their survival rates. Specifically, we test whether behavioral traits (activity level, boldness, and perch height) measured in predators and prey or multivariate behavioral volumes best predict the survival rates of both trophic levels in staged mesocosms with contrasting structural complexity. Behavioral volumes and hypervolumes are a composite group-level behavioral diversity metric built from the individual-level behavioral traits we measured in predators and prey. We stocked mesocosms with a host plant and groups of cannibalistic predators (n = 5 mantises/mesocosm) and their prey (n = 15 katydids/mesocosm), and mesocosms varied in the presence/absence of additional non-living climbing structures. We found that mantis survival rates were unrelated to any behavioral metric considered here, but were higher in structurally complex mesocosms. Unexpectedly, katydids were more likely to survive when mantis groups occupied larger behavioral volumes, indicating that more behaviorally diverse predator groups are less lethal. Katydid mortality was also increased when both predators and prey exhibited higher average perch heights, but this effect was increased by the addition of supplemental structure. This is consistent with the expectation that structural complexity increases the effect of intraspecific behavioral variation on prey survival rates. Collectively, these results convey that the effects of predator and prey behavior on prey survival could depend highly on the environment in which they are evaluated.
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Affiliation(s)
- James L L Lichtenstein
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Karis A Daniel
- Department of Biology, Wilson College, Chambersburg, PA, 17201, USA
| | - Joanna B Wong
- Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Colin M Wright
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Grant Navid Doering
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Raul Costa-Pereira
- Department of Ecology, São Paolo State University, São Paolo, 01049-010, Brazil
| | - Jonathan N Pruitt
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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14
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Michalko R, Pekár S, Entling MH. An updated perspective on spiders as generalist predators in biological control. Oecologia 2018; 189:21-36. [PMID: 30535723 DOI: 10.1007/s00442-018-4313-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 11/21/2018] [Indexed: 10/27/2022]
Abstract
The role of generalist predators in biological control remains controversial as they may not only reduce pest populations but also disrupt biocontrol exerted by other natural enemies. Here, we focus on spiders as a model group of generalist predators. They are among the most abundant and most diverse natural enemies in agroecosystems. We review their functional traits that influence food-web dynamics and pest suppression at organisational levels ranging from individuals to communities. At the individual and population levels, we focus on hunting strategy, body size, life stage, nutritional target, and personality (i.e., consistent inter-individual differences in behaviour). These functional traits determine the spider trophic niches. We also focus on the functional and numerical response to pest densities and on non-consumptive effects of spiders on pests. At the community level, we review multiple-predator effects and effect of alternative prey on pest suppression. Evidence for a key role of spiders in pest suppression is accumulating. Importantly, recent research has highlighted widespread non-consumptive effects and complex intraguild interactions of spiders. A better understanding of these effects is needed to optimize biocontrol services by spiders in agroecosystems.
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Affiliation(s)
- Radek Michalko
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 613 00, Brno, Czech Republic.
| | - Stano Pekár
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Martin H Entling
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, 76829, Landau/Pfalz, Germany
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15
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Debecker S, Stoks R. Pace of life syndrome under warming and pollution: integrating life history, behavior, and physiology across latitudes. ECOL MONOGR 2018. [DOI: 10.1002/ecm.1332] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sara Debecker
- Evolutionary Stress Ecology and Ecotoxicology; KU Leuven (University of Leuven); Charles Deberiotstraat 32 3000 Leuven Belgium
| | - Robby Stoks
- Evolutionary Stress Ecology and Ecotoxicology; KU Leuven (University of Leuven); Charles Deberiotstraat 32 3000 Leuven Belgium
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16
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Raffard A, Santoul F, Cucherousset J, Blanchet S. The community and ecosystem consequences of intraspecific diversity: a meta-analysis. Biol Rev Camb Philos Soc 2018; 94:648-661. [PMID: 30294844 DOI: 10.1111/brv.12472] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 09/12/2018] [Accepted: 09/14/2018] [Indexed: 12/12/2022]
Abstract
Understanding the relationships between biodiversity and ecosystem functioning has major implications. Biodiversity-ecosystem functioning relationships are generally investigated at the interspecific level, although intraspecific diversity (i.e. within-species diversity) is increasingly perceived as an important ecological facet of biodiversity. Here, we provide a quantitative and integrative synthesis testing, across diverse plant and animal species, whether intraspecific diversity is a major driver of community dynamics and ecosystem functioning. We specifically tested (i) whether the number of genotypes/phenotypes (i.e. intraspecific richness) or the specific identity of genotypes/phenotypes (i.e. intraspecific variation) in populations modulate the structure of communities and the functioning of ecosystems, (ii) whether the ecological effects of intraspecific richness and variation are strong in magnitude, and (iii) whether these effects vary among taxonomic groups and ecological responses. We found a non-linear relationship between intraspecific richness and community and ecosystem dynamics that follows a saturating curve shape, as observed for biodiversity-function relationships measured at the interspecific level. Importantly, intraspecific richness modulated ecological dynamics with a magnitude that was equal to that previously reported for interspecific richness. Our results further confirm, based on a database containing more than 50 species, that intraspecific variation also has substantial effects on ecological dynamics. We demonstrated that the effects of intraspecific variation are twice as high as expected by chance, and that they might have been underestimated previously. Finally, we found that the ecological effects of intraspecific variation are not homogeneous and are actually stronger when intraspecific variation is manipulated in primary producers than in consumer species, and when they are measured at the ecosystem rather than at the community level. Overall, we demonstrated that the two facets of intraspecific diversity (richness and variation) can both strongly affect community and ecosystem dynamics, which reveals the pivotal role of within-species biodiversity for understanding ecological dynamics.
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Affiliation(s)
- Allan Raffard
- CNRS, Station d'Écologie Théorique et Expérimentale du CNRS à Moulis UMR-5321, Université Toulouse III Paul Sabatier, 2 route du CNRS, F-09200, Moulis, France.,EcoLab, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
| | - Frédéric Santoul
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, 31062 Toulouse, France
| | - Julien Cucherousset
- CNRS, IRD, UPS, Laboratoire Évolution et Diversité Biologique (EDB UMR 5174), Université de Toulouse, 118 route de Narbonne, Toulouse 31062, France
| | - Simon Blanchet
- CNRS, Station d'Écologie Théorique et Expérimentale du CNRS à Moulis UMR-5321, Université Toulouse III Paul Sabatier, 2 route du CNRS, F-09200, Moulis, France.,CNRS, IRD, UPS, Laboratoire Évolution et Diversité Biologique (EDB UMR 5174), Université de Toulouse, 118 route de Narbonne, Toulouse 31062, France
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17
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Ingram T, Burns ZD. Top-down control by an aquatic invertebrate predator increases with temperature but does not depend on individual behavioral type. Ecol Evol 2018; 8:8256-8265. [PMID: 30250700 PMCID: PMC6144970 DOI: 10.1002/ece3.4367] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/25/2018] [Accepted: 06/25/2018] [Indexed: 11/16/2022] Open
Abstract
Variation in behavioral traits among individuals within a population can have implications for food webs and ecosystems. Temperature change also alters food web structure and function, but potential interactions between warming and intraspecific behavioral variation are largely unexplored. We aimed to test how increased temperature, individual activity level of a predatory backswimmer (Anisops assimilis), and their interaction influenced the strength of top-down control of zooplankton and phytoplankton. We used stable isotopes to support our assumption that the study population of A. assimilis is zooplanktivorous, and behavioral trials to confirm that activity level is a repeatable trait. We established freshwater microcosms to test for effects of warming, backswimmer presence, and backswimmer behavioral type on zooplankton density, zooplankton composition, and phytoplankton chlorophyll a. Top-down control was present and was generally stronger at increased temperature. There was no indication that predator behavioral type influenced the strength of top-down control either on its own or interactively with temperature. Predator behavioral type may not be associated with ecologically important function in this species at the temporal and spatial scales addressed in this study, but the links between behavior, temperature, and food web processes are worthy of broader exploration.
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Affiliation(s)
- Travis Ingram
- Department of ZoologyUniversity of OtagoDunedinNew Zealand
| | - Zuri D. Burns
- Department of ZoologyUniversity of OtagoDunedinNew Zealand
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18
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Conspecific boldness and predator species determine predation-risk consequences of prey personality. Behav Ecol Sociobiol 2018. [DOI: 10.1007/s00265-018-2544-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Raffard A, Lecerf A, Cote J, Buoro M, Lassus R, Cucherousset J. The functional syndrome: linking individual trait variability to ecosystem functioning. Proc Biol Sci 2018; 284:rspb.2017.1893. [PMID: 29212725 DOI: 10.1098/rspb.2017.1893] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 11/06/2017] [Indexed: 01/11/2023] Open
Abstract
Phenotypic variability is increasingly assessed through functional response and effect traits, which provide a mechanistic framework for investigating how an organism responds to varying ecological factors and how these responses affect ecosystem functioning. Covariation between response and effect traits has been poorly examined at the intraspecific level, thus hampering progress in understanding how phenotypic variability alters the role of organisms in ecosystems. Using a multi-trait approach and a nine-month longitudinal monitoring of individual red-swamp crayfish (Procambarus clarkii), we demonstrated that most of the measured response and effect traits were partially stable during the ontogeny of individuals. Suites of response and effect traits were associated with a response syndrome and an effect syndrome, respectively, which were correlated to form a functional syndrome. Using a bioenergetic model, we predicted that differences in the response syndrome composition of hypothetical populations had important ecological effects on a key ecosystem process (i.e. whole-lake litter decomposition) to a level similar to those induced by doubling population size. Demonstrating the existence of a functional syndrome is likely to improve our understanding of the ecological impacts of phenotypic variation among individuals in wild populations across levels of biological organization, and the linkage between ecosystem and evolutionary ecology.
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Affiliation(s)
- Allan Raffard
- Laboratoire Evolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, 118 route de Narbonne, Toulouse 31062, France
| | - Antoine Lecerf
- Ecolab, Universitè de Toulouse, 118 route de Narbonne, Toulouse 31062, France
| | - Julien Cote
- Laboratoire Evolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, 118 route de Narbonne, Toulouse 31062, France
| | - Mathieu Buoro
- Laboratoire Evolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, 118 route de Narbonne, Toulouse 31062, France.,ECOBIOP, INRA, Univ. Pau and Pays Adour, 64310 St Pée-sur-Nivelle, France
| | - Remy Lassus
- Laboratoire Evolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, 118 route de Narbonne, Toulouse 31062, France
| | - Julien Cucherousset
- Laboratoire Evolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, 118 route de Narbonne, Toulouse 31062, France
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20
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Palacios MM, Malerba ME, McCormick MI. Multiple predator effects on juvenile prey survival. Oecologia 2018; 188:417-427. [DOI: 10.1007/s00442-018-4182-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 06/02/2018] [Indexed: 11/30/2022]
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21
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Top predator’s aggressiveness and mesopredator’s risk-aversion additively determine probability of predation. Behav Ecol Sociobiol 2018. [DOI: 10.1007/s00265-018-2520-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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22
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Amat I, Desouhant E, Gomes E, Moreau J, Monceau K. Insect personality: what can we learn from metamorphosis? CURRENT OPINION IN INSECT SCIENCE 2018; 27:46-51. [PMID: 30025634 DOI: 10.1016/j.cois.2018.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/08/2018] [Accepted: 02/09/2018] [Indexed: 06/08/2023]
Abstract
Ontogeny of animal personality is still an open question. Testing whether personality traits correlated with state variables (e.g. metabolic rate, hormones) and/or life history traits, and which ones are involved, requires more empirical studies. Insects with metamorphosis represent a good opportunity to tackle this question. Because of the various degrees of internal (physiological, nervous) and environmental changes linked to metamorphosis they allow testing whether these modifications drive consistency in personality traits between immature and adult stages. In this review, we establish general predictions for the effects of metamorphosis on personality in insects with complete or incomplete metamorphosis and suffering from a strong or weak niche shift after metamorphosis. We then reviewed the still rare empirical literature and discuss future research axes.
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Affiliation(s)
- Isabelle Amat
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, 69100 Villeurbanne, France.
| | - Emmanuel Desouhant
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, 69100 Villeurbanne, France
| | - Elisa Gomes
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, 69100 Villeurbanne, France
| | - Jérôme Moreau
- UMR CNRS 6282 Biogéosciences, Equipe Ecologie Evolutive, Université de Bourgogne-Franche-Comté, 21000 Dijon, France
| | - Karine Monceau
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS, Université de la Rochelle, 79360 Villiers en Bois, France
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23
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Lichtenstein JLL, Rice HK, Pruitt JN. Personality variation in two predator species does not impact prey species survival or plant damage in staged mesocosms. Behav Ecol Sociobiol 2018. [DOI: 10.1007/s00265-018-2487-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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25
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Mennen GJ, Laskowski KL. Defence is the best offence: invasive prey behaviour is more important than native predator behaviour. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Carle T, Horiwaki R, Hurlbert A, Yamawaki Y. Aversive Learning in the Praying Mantis ( Tenodera aridifolia), a Sit and Wait Predator. JOURNAL OF INSECT BEHAVIOR 2018; 31:158-175. [PMID: 29628622 PMCID: PMC5882761 DOI: 10.1007/s10905-018-9665-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 06/08/2023]
Abstract
Animals learn to associate sensory cues with the palatability of food in order to avoid bitterness in food (a common sign of toxicity). Associations are important for active foraging predators to avoid unpalatable prey and to invest energy in searching for palatable prey only. However, it has been suggested that sit-and-wait predators might rely on the opportunity that palatable prey approach them by chance: the most efficient strategy could be to catch every available prey and then decide whether to ingest them or not. In the present study, we investigated avoidance learning in a sit-and-wait predator, the praying mantis (Tenodera aridifolia). To examine the effects of conspicuousness and novelty of prey on avoidance learning, we used three different prey species: mealworms (novel prey), honeybees (novel prey with conspicuous signals) and crickets (familiar prey). We sequentially presented the prey species in pairs and made one of them artificially bitter. In the absence of bitterness, the mantises consumed bees and crickets more frequently than mealworms. When the prey were made bitter, the mantises still continued to attack bitter crickets as expected. However, they reduced their attacks on bitter mealworms more than on bitter bees. This contrasts with the fact that conspicuous signals (e.g. coloration in bees) facilitate avoidance learning in active foraging predators. Surprisingly, we found that the bitter bees were totally rejected after an attack whereas bitter mealworms were partially eaten (~35%). Our results highlight the fact that the mantises might maintain a selection pressure on bees, and perhaps on aposematic species in general.
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Affiliation(s)
- Thomas Carle
- Present Address: Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395 Japan
- Present Address: Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE2 4HH UK
| | - Rio Horiwaki
- Present Address: Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395 Japan
| | - Anya Hurlbert
- Present Address: Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE2 4HH UK
| | - Yoshifumi Yamawaki
- Present Address: Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395 Japan
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27
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Lichtenstein JLL, Chism GT, Kamath A, Pruitt JN. Intraindividual Behavioral Variability Predicts Foraging Outcome in a Beach-dwelling Jumping Spider. Sci Rep 2017; 7:18063. [PMID: 29273746 PMCID: PMC5741732 DOI: 10.1038/s41598-017-18359-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 12/06/2017] [Indexed: 01/23/2023] Open
Abstract
Animal personality, defined as consistent differences between individuals in behavior, has been the subject of hundreds if not thousands of papers. However, little work explores the fitness consequences of variation in behavior within individuals, or intraindividual variability (IIV). We probe the effects of behavioral IIV on predator-prey interaction outcomes in beach-dwelling jumping spiders (Terralonus californicus). Prior studies have found that spiders with higher body condition (body mass relative to size) behave more variably. Thus, we hypothesized that jumping spider activity level IIV would relate positively to foraging performance. To address this, we tested for associations between activity IIV, average activity level, and two measures of foraging success in laboratory mesocosms: change in spider mass and the number of prey killed. Activity IIV positively correlated with the mass that spiders gained from prey, but not with the number of prey killed. This suggests that spiders with high IIV consumed a greater proportion of their prey or used less energy. Interestingly, average activity level (personality) predicted neither metric of foraging success, indicating that behavioral IIV can predict metrics of success that personality does not. Therefore, our findings suggest that IIV should be considered alongside personality in studies of predator-prey interactions.
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Affiliation(s)
- James L L Lichtenstein
- Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Gregory T Chism
- Graduate Interdisciplinary Program in Entomology and Insect Science, University of Arizona, Tucson, AZ, 85721, USA
| | - Ambika Kamath
- Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Jonathan N Pruitt
- Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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28
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The ecological importance of intraspecific variation. Nat Ecol Evol 2017; 2:57-64. [PMID: 29203921 DOI: 10.1038/s41559-017-0402-5] [Citation(s) in RCA: 331] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 11/02/2017] [Indexed: 01/27/2023]
Abstract
Human activity is causing wild populations to experience rapid trait change and local extirpation. The resulting effects on intraspecific variation could have substantial consequences for ecological processes and ecosystem services. Although researchers have long acknowledged that variation among species influences the surrounding environment, only recently has evidence accumulated for the ecological importance of variation within species. We conducted a meta-analysis comparing the ecological effects of variation within a species (intraspecific effects) with the effects of replacement or removal of that species (species effects). We evaluated direct and indirect ecological responses, including changes in abundance (or biomass), rates of ecological processes and changes in community composition. Our results show that intraspecific effects are often comparable to, and sometimes stronger than, species effects. Species effects tend to be larger for direct ecological responses (for example, through consumption), whereas intraspecific effects and species effects tend to be similar for indirect responses (for example, through trophic cascades). Intraspecific effects are especially strong when indirect interactions alter community composition. Our results summarize data from the first generation of studies examining the relative ecological effects of intraspecific variation. Our conclusions can help inform the design of future experiments and the formulation of strategies to quantify and conserve biodiversity.
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29
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Charalabidis A, Dechaume-Moncharmont FX, Petit S, Bohan DA. Risk of predation makes foragers less choosy about their food. PLoS One 2017; 12:e0187167. [PMID: 29121652 PMCID: PMC5679636 DOI: 10.1371/journal.pone.0187167] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 10/14/2017] [Indexed: 11/18/2022] Open
Abstract
Animals foraging in the wild have to balance speed of decision making and accuracy of assessment of a food item's quality. If resource quality is important for maximizing fitness, then the duration of decision making may be in conflict with other crucial and time consuming tasks, such as anti-predator behaviours or competition monitoring. Individuals facing the risk of predation and/or competition should adjust the duration of decision making and, as a consequence, their level of choosiness for resources. When exposed to predation, the forager could either maintain its level of choosiness for food items but accept a reduction in the amount of food items consumed or it could reduce its level of choosiness and accept all prey items encountered. Under competition risk, individuals are expected to reduce their level of choosiness as slow decision making exposes individuals to a higher risk of opportunity costs. To test these predictions, the level of choosiness of a seed-eating carabid beetle, Harpalus affinis, was examined under 4 different experimental conditions of risk: i) predation risk; ii) intraspecific competition; iii) interspecific competition; and, iv) control. All the risks were simulated using chemical cues from individual conspecifics or beetles of different species that are predatory or granivorous. Our results show that when foraging under the risk of predation, H. affinis individuals significantly reduce their level of choosiness for seeds. Reductions in level of choosiness for food items might serve as a sensible strategy to reduce both the total duration of a foraging task and the cognitive load of the food quality assessment. No significant differences were observed when individuals were exposed to competition cues. Competition, (i.e opportunity cost) may not be perceived as risk high enough to induce changes in the level of choosiness. Our results suggest that considering the amount of items consumed, alone, would be a misleading metric when assessing individual response to a risk of predation. Foraging studies should therefore also take in account the decision making process.
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Affiliation(s)
- Alice Charalabidis
- Agroécologie, AgroSup Dijon, INRA, Université de Bourgogne Franche-Comté, Dijon, France
- Université de Bourgogne Franche-Comté, UMR CNRS 6282 Biogéosciences, Evolutionary Ecology group, Dijon, France
| | | | - Sandrine Petit
- Agroécologie, AgroSup Dijon, INRA, Université de Bourgogne Franche-Comté, Dijon, France
| | - David A. Bohan
- Agroécologie, AgroSup Dijon, INRA, Université de Bourgogne Franche-Comté, Dijon, France
- * E-mail:
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30
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Zwolak R. How intraspecific variation in seed-dispersing animals matters for plants. Biol Rev Camb Philos Soc 2017; 93:897-913. [DOI: 10.1111/brv.12377] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 09/13/2017] [Accepted: 09/18/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Rafał Zwolak
- Department of Systematic Zoology, Faculty of Biology; Adam Mickiewicz University, Umultowska 89; 61-614 Poznań Poland
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31
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Cote J, Brodin T, Fogarty S, Sih A. Non-random dispersal mediates invader impacts on the invertebrate community. J Anim Ecol 2017; 86:1298-1307. [PMID: 28857202 DOI: 10.1111/1365-2656.12734] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 07/03/2017] [Indexed: 11/29/2022]
Abstract
Dispersers are often not a random draw from a population, dispersal propensity being conditional on individual phenotypic traits and local contexts. This non-randomness consequently results in phenotypic differences between dispersers and non-dispersers and, in the context of biological invasions, in an invasion front made of individuals with a biased phenotype. This bias of phenotypes at the front may subsequently modulate the strength of ecological effects of an invasive species on invaded communities. We recently demonstrated that more asocial mosquitofish (Gambusia affinis), one of the 100 worst invasive species, disperse further, suggesting a sociability-biased invasion front. As behavioural types are related to the strength of interspecific interactions, an invasion by a biased subset of individuals should have important ecological implications for native communities. Here, we tested the impact of phenotypic biases in dispersing individuals (relative to non-dispersers) on prey communities in experimental mesocosms. We show that dispersers reduce prey abundance more than do non-dispersers during the first 4 weeks after introduction, and that the disperser's social types are likely drivers of these differences. These differences in prey communities disappeared after 8 weeks suggesting prey community resilience against predation in these mesocosm ecosystems. Consequently, we call for the integration of non-random dispersal, dispersal syndromes and more generally intraspecific variation into studies predicting the impacts of invasions.
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Affiliation(s)
- Julien Cote
- UMR5174EDB (Laboratoire Évolution & Diversité Biologique), CNRS, Université Toulouse III Paul Sabatier, ENFA, Toulouse, France
| | - Tomas Brodin
- Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden
| | - Sean Fogarty
- Department of Environmental Science and Policy, University of California, Davis, CA, USA
| | - Andrew Sih
- Department of Environmental Science and Policy, University of California, Davis, CA, USA
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32
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Lichtenstein JLL, Wright CM, McEwen B, Pinter-Wollman N, Pruitt JN. The multidimensional behavioural hypervolumes of two interacting species predict their space use and survival. Anim Behav 2017; 132:129-136. [PMID: 29681647 DOI: 10.1016/j.anbehav.2017.08.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Individual animals differ consistently in their behaviour, thus impacting a wide variety of ecological outcomes. Recent advances in animal personality research have established the ecological importance of the multidimensional behavioural volume occupied by individuals and by multispecies communities. Here, we examine the degree to which the multidimensional behavioural volume of a group predicts the outcome of both intra- and interspecific interactions. In particular, we test the hypothesis that a population of conspecifics will experience low intraspecific competition when the population occupies a large volume in behavioural space. We further hypothesize that populations of interacting species will exhibit greater interspecific competition when one or both species occupy large volumes in behavioural space. We evaluate these hypotheses by studying groups of katydids (Scudderia nymphs) and froghoppers (Philaenus spumarius), which compete for food and space on their shared host plant, Solidago canadensis. We found that individuals in single-species groups of katydids positioned themselves closer to one another, suggesting reduced competition, when groups occupied a large behavioural volume. When both species were placed together, we found that the survival of froghoppers was greatest when both froghoppers and katydids occupied a small volume in behavioural space, particularly at high froghopper densities. These results suggest that groups that occupy large behavioural volumes can have low intraspecific competition but high interspecific competition. Thus, behavioural hypervolumes appear to have ecological consequences at both the level of the population and the community and may help to predict the intensity of competition both within and across species.
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Affiliation(s)
- James L L Lichtenstein
- Department of Ecology, Evolution & Marine Biology, University of California Santa Barbara, Santa Barbara, CA, U.S.A
| | - Colin M Wright
- Department of Ecology, Evolution & Marine Biology, University of California Santa Barbara, Santa Barbara, CA, U.S.A
| | - Brendan McEwen
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, U.S.A
| | - Noa Pinter-Wollman
- Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, CA, U.S.A
| | - Jonathan N Pruitt
- Department of Ecology, Evolution & Marine Biology, University of California Santa Barbara, Santa Barbara, CA, U.S.A
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33
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Moran NP, Wong BBM, Thompson RM. Weaving animal temperament into food webs: implications for biodiversity. OIKOS 2017. [DOI: 10.1111/oik.03642] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nicholas P. Moran
- School of Biological Science; Wellington Rd Clayton, Victoria 3800 Australia
| | - Bob B. M. Wong
- School of Biological Science; Wellington Rd Clayton, Victoria 3800 Australia
| | - Ross M. Thompson
- Thompson, Inst. for Applied Ecology, Univ. of Canberra; Bruce, ACT Australia
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34
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Pruitt JN. Are personality researchers painting the roses red? Maybe: a comment on Beekman and Jordan. Behav Ecol 2017. [DOI: 10.1093/beheco/arx030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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35
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Jonsson M, Kaartinen R, Straub CS. Relationships between natural enemy diversity and biological control. CURRENT OPINION IN INSECT SCIENCE 2017; 20:1-6. [PMID: 28602230 DOI: 10.1016/j.cois.2017.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/03/2017] [Indexed: 05/17/2023]
Abstract
Natural enemy diversity generally strengthens biological control, but individual studies have found everything from positive to negative effects. We discuss the factors that promote these different outcomes. We argue that a trait-based approach is helpful to improve our understanding of the relationship between enemy diversity and biological control, and suggest that enemy diversity is likely to be particularly important as an insurance against effects of climate change. Future research should increase the scale and ecological realism of enemy diversity studies, and consider both the strength and stability of biological control. Such research is likely to reveal even stronger evidence that conserving enemy biodiversity will improve biological pest control.
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Affiliation(s)
- Mattias Jonsson
- Swedish University of Agricultural Sciences, Department of Ecology, PO Box 7044, SE-750 07 Uppsala, Sweden.
| | - Riikka Kaartinen
- University of Edinburgh, Institute of Evolutionary Biology, Ashworth 11 Laboratories, Charlotte Auerbach Road, Edinburgh EH9 3FL, UK.
| | - Cory S Straub
- Department of Biology, Ursinus College, Collegeville, PA 19426-1000, USA.
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36
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Affiliation(s)
- Lucy Genua
- Dept of Ecology and Evolutionary Biology, Univ. of Toronto; Toronto ON, M5S 3B3 Canada
| | - Denon Start
- Dept of Ecology and Evolutionary Biology, Univ. of Toronto; Toronto ON, M5S 3B3 Canada
| | - Benjamin Gilbert
- Dept of Ecology and Evolutionary Biology, Univ. of Toronto; Toronto ON, M5S 3B3 Canada
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37
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Pruitt JN, Howell KA, Gladney SJ, Yang Y, Lichtenstein JLL, Spicer ME, Echeverri SA, Pinter-Wollman N. Behavioral Hypervolumes of Predator Groups and Predator-Predator Interactions Shape Prey Survival Rates and Selection on Prey Behavior. Am Nat 2017; 189:254-266. [PMID: 28221831 PMCID: PMC5476219 DOI: 10.1086/690292] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Predator-prey interactions often vary on the basis of the traits of the individual predators and prey involved. Here we examine whether the multidimensional behavioral diversity of predator groups shapes prey mortality rates and selection on prey behavior. We ran individual sea stars (Pisaster ochraceus) through three behavioral assays to characterize individuals' behavioral phenotype along three axes. We then created groups that varied in the volume of behavioral space that they occupied. We further manipulated the ability of predators to interact with one another physically via the addition of barriers. Prey snails (Chlorostome funebralis) were also run through an assay to evaluate their predator avoidance behavior before their use in mesocosm experiments. We then subjected pools of prey to predator groups and recorded the number of prey consumed and their behavioral phenotypes. We found that predator-predator interactions changed survival selection on prey traits: when predators were prevented from interacting, more fearful snails had higher survival rates, whereas prey fearfulness had no effect on survival when predators were free to interact. We also found that groups of predators that occupied a larger volume in behavioral trait space consumed 35% more prey snails than homogeneous predator groups. Finally, we found that behavioral hypervolumes were better predictors of prey survival rates than single behavioral traits or other multivariate statistics (i.e., principal component analysis). Taken together, predator-predator interactions and multidimensional behavioral diversity determine prey survival rates and selection on prey traits in this system.
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Affiliation(s)
- Jonathan N. Pruitt
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, California 93608
| | - Kimberly A. Howell
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
| | - Shaniqua J. Gladney
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
| | - Yusan Yang
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
| | - James L. L. Lichtenstein
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, California 93608
| | - Michelle Elise Spicer
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
| | - Sebastian A. Echeverri
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15620
| | - Noa Pinter-Wollman
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095
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Hesterberg SG, Duckett CC, Salewski EA, Bell SS. Three-dimensional interstitial space mediates predator foraging success in different spatial arrangements. Ecology 2017; 98:1153-1162. [PMID: 28144935 DOI: 10.1002/ecy.1762] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 11/14/2016] [Accepted: 01/24/2017] [Indexed: 11/11/2022]
Abstract
Identifying and quantifying the relevant properties of habitat structure that mediate predator-prey interactions remains a persistent challenge. Most previous studies investigate effects of structural density on trophic interactions and typically quantify refuge quality using one or two-dimensional metrics. Few consider spatial arrangement of components (i.e., orientation and shape) and often neglect to measure the total three-dimensional (3D) space available as refuge. This study tests whether the three-dimensionality of interstitial space, an attribute produced by the spatial arrangement of oyster (Crassostrea virginica) shells, impacts the foraging success of nektonic predators (primary blue crab, Callinectes sapidus) on mud crab prey (Eurypanopeus depressus) in field and mesocosm experiments. Interstices of 3D-printed shell mimics were manipulated by changing either their orientation (angle) or internal shape (crevice or channel). In both field and mesocosm experiments, under conditions of constant structural density, predator foraging success was influenced by 3D aspects of interstitial space. Proportional survivorship of tethered mud crabs differed significantly as 3D interstitial space varied by orientation, displaying decreasing prey survivorship as angle of orientation increased (0° = 0.76, 22.5° = 0.13, 45° = 0.0). Tethered prey survivorship was high when 3D interstitial space of mimics was modified by internal shape (crevice survivorship = 0.89, channel survivorship = 0.96) and these values did not differ significantly. In mesocosms, foraging success of blue crabs varied with 3D interstitial space as mean proportional survivorship (± SE) of mud crabs was significantly lower in 45° (0.27 ± 0.06) vs. 0° (0.86 ± 0.04) orientations and for crevice (0.52 ± 0.11) vs. channel shapes (0.95 ± 0.02). These results suggest that 3D aspects of interstitial space, which have direct relevance to refuge quality, can strongly influence foraging success in our oyster reef habitat. Our findings highlight the importance of spatial arrangement in mediating consumptive pathways in hard-structured habitats and demonstrate how quantifying the three-dimensionality of living space captures aspects of habitat structure that have been missing from previous empirical studies of trophic interactions and structural complexity.
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Affiliation(s)
- Stephen G Hesterberg
- Department of Integrative Biology, University of South Florida, 4202 East Fowler Ave, SCA 110, Tampa, Florida, 33620, USA
| | - C Cole Duckett
- Department of Integrative Biology, University of South Florida, 4202 East Fowler Ave, SCA 110, Tampa, Florida, 33620, USA
| | - Elizabeth A Salewski
- Department of Integrative Biology, University of South Florida, 4202 East Fowler Ave, SCA 110, Tampa, Florida, 33620, USA
| | - Susan S Bell
- Department of Integrative Biology, University of South Florida, 4202 East Fowler Ave, SCA 110, Tampa, Florida, 33620, USA
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39
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Start D, Gilbert B. Predator personality structures prey communities and trophic cascades. Ecol Lett 2017; 20:366-374. [PMID: 28120366 DOI: 10.1111/ele.12735] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/03/2016] [Accepted: 12/19/2016] [Indexed: 11/30/2022]
Abstract
Intraspecific variation is central to our understanding of evolution and population ecology, yet its consequences for community ecology are poorly understood. Animal personality - consistent individual differences in suites of behaviours - may be particularly important for trophic dynamics, where predator personality can determine activity rates and patterns of attack. We used mesocosms with aquatic food webs in which the top predator (dragonfly nymphs) varied in activity and subsequent attack rates on zooplankton, and tested the effects of predator personality. We found support for four hypotheses: (1) active predators disproportionately reduce the abundance of prey, (2) active predators select for predator-resistant prey species, (3) active predators strengthen trophic cascades (increase phytoplankton abundance) and (4) active predators are more likely to cannibalise one another, weakening all other trends when at high densities. These results suggest that intraspecific variation in predator personality is an important determinant of prey abundance, community composition and trophic cascades.
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Affiliation(s)
- Denon Start
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada, M5S 3B3
| | - Benjamin Gilbert
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada, M5S 3B3
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40
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Michalko R, Pekár S. The Behavioral Type of a Top Predator Drives the Short-Term Dynamic of Intraguild Predation. Am Nat 2017; 189:242-253. [PMID: 28221826 DOI: 10.1086/690501] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Variation in behavior among individual top predators (i.e., the behavioral type) can strongly shape pest suppression in intraguild predation (IGP). However, the effect of a top predator's behavioral type-namely, foraging aggressiveness (number of killed divided by prey time) and prey choosiness (preference degree for certain prey type)-on the dynamic of IGP may interact with the relative abundances of top predator, mesopredator, and pest. We investigated the influence of the top predator's behavioral type on the dynamic of IGP in a three-species system with a top predator spider, a mesopredator spider, and a psyllid pest using a simulation model. The model parameters were estimated from laboratory experiments and field observations. The top predator's behavioral type altered the food-web dynamics in a context-dependent manner. The system with an aggressive/nonchoosy top predator, without prey preferences between pest and mesopredator, suppressed the pest more when the top predator to mesopredator abundance ratio was high. In contrast, the system with a timid/choosy top predator that preferred the pest to the mesopredator was more effective when the ratio was low. Our results show that the behavioral types and abundances of interacting species need to be considered together when studying food-web dynamics, because they evidently interact. To improve biocontrol efficiency of predators, research on the alteration of their behavioral types is needed.
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Chang CC, Teo HY, Norma-Rashid Y, Li D. Predator personality and prey behavioural predictability jointly determine foraging performance. Sci Rep 2017; 7:40734. [PMID: 28094288 PMCID: PMC5240143 DOI: 10.1038/srep40734] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/09/2016] [Indexed: 11/29/2022] Open
Abstract
Predator-prey interactions play important roles in ecological communities. Personality, consistent inter-individual differences in behaviour, of predators, prey or both are known to influence inter-specific interactions. An individual may also behave differently under the same situation and the level of such variability may differ between individuals. Such intra-individual variability (IIV) or predictability may be a trait on which selection can also act. A few studies have revealed the joint effect of personality types of both predators and prey on predator foraging performance. However, how personality type and IIV of both predators and prey jointly influence predator foraging performance remains untested empirically. Here, we addressed this using a specialized spider-eating jumping spider, Portia labiata (Salticidae), as the predator, and a jumping spider, Cosmophasis umbratica, as the prey. We examined personality types and IIVs of both P. labiata and C. umbratica and used their inter- and intra-individual behavioural variation as predictors of foraging performance (i.e., number of attempts to capture prey). Personality type and predictability had a joint effect on predator foraging performance. Aggressive predators performed better in capturing unpredictable (high IIV) prey than predictable (low IIV) prey, while docile predators demonstrated better performance when encountering predictable prey. This study highlights the importance of the joint effect of both predator and prey personality types and IIVs on predator-prey interactions.
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Affiliation(s)
- Chia-Chen Chang
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Huey Yee Teo
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Y Norma-Rashid
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Daiqin Li
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
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Nakayama S, Rapp T, Arlinghaus R. Fast-slow life history is correlated with individual differences in movements and prey selection in an aquatic predator in the wild. J Anim Ecol 2016; 86:192-201. [PMID: 27748952 DOI: 10.1111/1365-2656.12603] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 10/10/2016] [Indexed: 12/28/2022]
Abstract
Fast and slow life histories are proposed to covary with consistent individual differences in behaviour, but little is known whether it holds in the wild, where individuals experience natural fluctuations of the environment. We investigated whether individual differences in behaviour, such as movement traits and prey selection, are linked to variation in life-history traits in Eurasian perch (Perca fluviatilis) in the wild. Using high-resolution acoustic telemetry, we collected the positional data of fish in a whole natural lake and estimated individual movement traits by fitting a two-state correlated random walk model. Prey selection was inferred from stable isotope analysis using scale samples. Life-history traits were estimated by fitting a biphasic growth model to an individual growth trajectory back-calculated from scale samples. Life-history traits were correlated with behavioural traits such as movements and prey selection. Individuals with higher reproductive effort were found to switch more frequently between active and inactive modes and show greater reliance on prey from pelagic pathways (indicated by lower δ13 C). Further, individuals with faster juvenile growth were found to stay active for a longer time during the adult stage. Our results demonstrate the link between individual behavioural differences and fast-slow life-history traits under ecologically relevant conditions.
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Affiliation(s)
- Shinnosuke Nakayama
- Division of Integrative Fisheries Management, Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, 10115, Germany.,Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, 12587, Germany
| | - Tobias Rapp
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, 12587, Germany
| | - Robert Arlinghaus
- Division of Integrative Fisheries Management, Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, 10115, Germany.,Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, 12587, Germany
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43
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Nannini MA, Wahl DH. Does prey community composition affect the way different behavioral types interact with their environment? Oecologia 2016; 182:453-62. [DOI: 10.1007/s00442-016-3681-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 06/14/2016] [Indexed: 11/28/2022]
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44
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Personality, foraging behavior and specialization: integrating behavioral and food web ecology at the individual level. Oecologia 2016; 182:55-69. [PMID: 27170290 DOI: 10.1007/s00442-016-3648-8] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 04/28/2016] [Indexed: 12/13/2022]
Abstract
Behavioral traits and diet were traditionally thought to be highly plastic within individuals. This view was espoused in the widespread use of optimality models, which broadly predict that individuals can modify behavioral traits and diet across ecological contexts to maximize fitness. Yet, research conducted over the past 15 years supports an alternative view; fundamental behavioral traits (e.g., activity level, exploration, sociability, boldness and aggressiveness) and diet often vary among individuals and this variation persists over time and across contexts. This phenomenon has been termed animal personality with regard to behavioral traits and individual specialization with regard to diet. While these aspects of individual-level phenotypic variation have been thus far studied in isolation, emerging evidence suggests that personality and individual specialization may covary, or even be causally related. Building on this work, we present the overarching hypothesis that animal personality can drive specialization through individual differences in various aspects of consumer foraging behavior. Specifically, we suggest pathways by which consumer personality traits influence foraging activity, risk-dependent foraging, roles in social foraging groups, spatial aspects of foraging and physiological drivers of foraging, which in turn can lead to consistent individual differences in food resource use. These pathways provide a basis for generating testable hypotheses directly linking animal personality to ecological dynamics, a major goal in contemporary behavioral ecology.
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