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Muñoz NJ, Reid B, Correa C, Madriz RI, Neff BD, Reynolds JD. Emergent trophic interactions following the Chinook salmon invasion of Patagonia. Ecosphere 2022. [DOI: 10.1002/ecs2.3910] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Nicolas J. Muñoz
- Earth to Ocean Research Group Simon Fraser University Burnaby British Columbia Canada
| | - Brian Reid
- Laboratorio de Limnología Centro de Investigación en Ecosistemas de la Patagonia Coyhaique Chile
| | - Cristian Correa
- Instituto de Conservación Biodiversidad y Territorio Universidad Austral de Chile Valdivia Chile
- Centro de Humedales Río Cruces Universidad Austral de Chile Valdivia Chile
| | - Ruben Isaí Madriz
- Independent Investigator Puerto Rio Tranquilo Chile
- Independent Investigator Aurora Illinois USA
| | - Bryan D. Neff
- Department of Biology University of Western Ontario London Ontario Canada
| | - John D. Reynolds
- Earth to Ocean Research Group Simon Fraser University Burnaby British Columbia Canada
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Juvenile salmon presence effects on the diet of native Puye Galaxias maculatus in lakes and estuaries of Patagonian fjords. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02628-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Historical and Contemporary Diversity of Galaxiids in South America: Biogeographic and Phylogenetic Perspectives. DIVERSITY-BASEL 2020. [DOI: 10.3390/d12080304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Galaxiid fishes from South America are represented by three genera (Aplochiton, Brachygalaxias and Galaxias) and eight species. Their genetic patterns have been studied over the last two decades to disentangle how historical and contemporary processes influenced their biogeographic distribution and phylogeographic patterns. Here we review and synthesize this body of work. Phylogeographic approaches reveal the important role played by orogeny and the expansion/melting of glacial ice during the Quaternary. Populations retreated to glacial refugia during glacial times and some systems experienced drainage reversals from the Atlantic to the Pacific following deglaciation. Although most species expanded their populations and increased their genetic diversity during the Holocene, the introduction of salmonids and the construction of dams are likely to lead to a decline in genetic diversity for at least some species. An improvement in our understanding of the processes that influenced historical and contemporary diversity patterns among galaxiid and other native fishes in South America is necessary for addressing the cumulative and synergistic impacts of human activity on this unique freshwater fauna.
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New Insights into the Distribution, Physiology and Life Histories of South American Galaxiid Fishes, and Potential Threats to This Unique Fauna. DIVERSITY 2020. [DOI: 10.3390/d12050178] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
South American galaxiids occupy both Patagonia and the ichthyogeographic Chilean Province, encompassing glacial Andean deep lakes, shallow plateau lakes, reservoirs, short Pacific rivers and long Atlantic rivers. The total fish fauna includes 29 species, comprising Neotropical fishes (siluriforms and characids), galaxiids, percichthyids, atherinopsids and mugilids, two lamprey species, and several exotic fishes (salmonids, Gambusia spp. and common carp). The family Galaxiidae shares a common ancestry with the Gondwanan temperate fish fauna, played a major role in the post-glacial colonization of Andean lakes and streams, and contributes key species to the food webs. Galaxiid species occupy an enormous latitudinal gradient, show a wide variety of life history patterns and are the southernmost native freshwater fishes of the world. Knowledge of South American galaxiids has improved notably, but new challenges arise due to climate change, biological invasions, damming, aquaculture and contamination. In this changing environment, the future of South American galaxiids should be carefully considered as a legacy of the old Gondwana and a unique attribute of the freshwaters of southern South America.
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