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dc.contributor.authorOlden, Julian D
dc.contributor.authorKennard, Mark J
dc.contributor.editorGido, KB
dc.contributor.editorJackson, DA
dc.date.accessioned2017-05-03T11:30:22Z
dc.date.available2017-05-03T11:30:22Z
dc.date.issued2010
dc.date.modified2011-06-07T06:56:05Z
dc.identifier.isbn978-1-934874-14-1
dc.identifier.urihttp://hdl.handle.net/10072/34552
dc.description.abstractThe flow regime is considered the primary driver of physical processes in riverine ecosystems; thus we expect that the trait composition of fish assemblages might respond similarly to hydrologic variability, even at broad spatial scales. Here, we test the hypothesis that freshwater fish life history strategies on two continents (southern United States and eastern Australia) converge along gradients of hydrologic variability and primary productivity at the drainage scale. Our results show that the fishes of the United States and Australia conform to the three-dimensional adaptive space arising from the trade-offs among three basic demographic parameters of survival, fecundity, and onset and duration of reproductive life. Species from both continents represent the endpoints in adaptive space defining the periodic (19% versus 33% for the United States and Australia, respectively), opportunistic (69% versus 52%), and equilibrium life history strategies (12% versus 15%). We found evidence that fish life history composition of drainage basins in the two continents have converged across similar gradients of hydrologic variability and productivity despite phylogenetic and historical differences. Moreover, these relationships were largely consistent with predictions from life history theory. Increasing hydrologic variability has promoted the greater prevalence of opportunistic strategists (a strategy that should maximize fitness in environmental settings dominated by unpredictable environmental change) while concurrently minimizing the persistence of periodic-type species (a strategy typically inhabits seasonal, periodically suitable environments). Our study provides a conceptual framework of management options for species in regulated rivers because life history strategies are the underlying determinants for population responses to environmental change and therefore can be used to classify typical population responses to flow alteration or mitigation via environmental flow prescriptions.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent1236307 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Fisheries Society
dc.publisher.placeUnited States
dc.publisher.urihttp://www.afsbooks.org/54073P
dc.publisher.urihttp://fisheries.org/afs/index.html
dc.relation.ispartofbooktitleCommunity Ecology of Stream Fishes: Concepts, Approaches, and Techniques
dc.relation.ispartofchapter5
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom83
dc.relation.ispartofpageto107
dc.rights.retentionY
dc.subject.fieldofresearchCommunity ecology (excl. invasive species ecology)
dc.subject.fieldofresearchcode310302
dc.titleIntercontinental comparison of fish life history strategies along a gradient of hydrologic variability
dc.typeBook chapter
dc.type.descriptionB1 - Chapters
dc.type.codeB - Book Chapters
gro.rights.copyright© 2010 American Fisheries Society. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the publisher's website for further information.
gro.date.issued2010
gro.hasfulltextFull Text
gro.griffith.authorKennard, Mark J.


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