Climate change impacts on freshwater fishes: a Patagonian perspective

Becker, Leandro Aníbal; Crichigno, Sonia Alejandra; Cussac, Víctor E.

doi:10.1007/s10750-017-3310-4

Cited by 15 publications

(13 citation statements)

References 143 publications

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“…In the same way, the genetic estimation of divergence times indicates the historical presence of G. platei in South America not just before the rise of the Andes mountains, in Miocene [9], but even in the Oligocene, before the detachment of Australia and South America [9,23]. Further work is required to properly address the position of G. platei within Galaxiidae [6], including an ecomorphological and ecophysiological comparison with Neochana species.…”

Section: Taxonomical Updatementioning

confidence: 99%

“…Temperature [6,82] and the concept of thermal niche [83] are at the very basis of the ongoing interplay between the confluence of different fish groups and the environment in Patagonia. During the period 1961-2018, the temperature increase in Patagonia (annual mean temperature) reached up to 1.5 • C [84].…”

Section: Climate Change Invasions and Translocationsmentioning

confidence: 99%

“…The population from lake Espejo (Table S1), with an intermediate piscivory level, was inhabited by individuals with both long and short caudal fins. Furthermore, the morphological variation within this lake was explained Early references about Patagonian fish fauna [5] clearly recognized "Primary and secondary fishes: Trichomycteridae and other catfishes, Characidae, Poeciliidae" as having a South American origin or having entered South America from other land areas, and "Peripheral fishes: Atherinidae, Serranidae, Galaxiidae, Aplochitonidae, Geotriinae" that colonized fresh waters from marine habitats [6]. Today, this unique fish fauna comprises 29 fish species: neotropical siluriforms and characids, galaxiids, local oceanic families (percichthyids, atherinopsids and mugilids), two South American lampreys, a few species of non-native salmonids, poecilids and one cyprinid [6,7].…”

Section: Introductionmentioning

confidence: 99%

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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

et al. 2020

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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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Section: Taxonomical Updatementioning

confidence: 99%

Section: Climate Change Invasions and Translocationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

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“…In addition, G. maculatus resident populations inhabiting upstream river zones, often most affected by the habitat alteration that follows dam construction and the development of man-made reservoirs, are generally also affected most by introduced salmonids. The cumulative and synergistic impacts of these different stressors in South American galaxiids needs to be addressed quickly in order to conserve these species in lakes and rivers [76].…”

Section: Genetic Diversity: the Role Of Contemporary Impacts Of Humanmentioning

confidence: 99%

Historical and Contemporary Diversity of Galaxiids in South America: Biogeographic and Phylogenetic Perspectives

et al. 2020

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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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“…Compared to the hyperdiverse tropics, the temperate freshwater lakes and rivers of southern South America harbour a modest fish fauna, following a latitudinal trend towards lowest species diversity in southern Patagonia. Many fish species in Patagonia are endemic (Abell et al, ), of local economic and ecological importance (Cussac et al, ), and both the rapidly changing climate and introductions of invasive species are threats to these unique fishes (Becker, Crichigno, & Cussac, ; Rueda et al, ; Strüssmann, Conover, Somoza, & Miranda, ). Species inhabiting this region have evolutionary histories heavily influenced by temperature, the rise of the Andes, historical connectivity of rivers and lakes, and glaciation events (Cussac et al, ; Habit, Gonzalez, Ruzzante, & Walde, ; Ortubay, Gómez, & Cussac, ; Unmack, Barriga, Battini, Habit, & Johnson, ; Unmack, Bennin, Habit, Victoriano, & Johnson, ).…”

Section: Introductionmentioning

confidence: 99%

Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data

et al. 2020

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Rivers and lake systems in the southern cone of South America have been widely influenced by historical glaciations, carrying important implications for the evolution of aquatic organisms, including prompting transitions between marine and freshwater habitats and by triggering hybridization among incipient species via waterway connectivity and stream capture events. Silverside fishes (Odontesthes) in the region comprise a radiation of 19 marine and freshwater species that have been hypothesized on the basis of morphological or mitochondrial DNA data to have either transitioned repeatedly into continental waters from the sea or colonized marine habitats following freshwater diversification. New double digest restriction‐site associated DNA data presented here provide a robust framework to investigate the biogeographical history of and habitat transitions in Odontesthes. We show that Odontesthes silversides originally diversified in the Pacific but independently colonized the Atlantic three times, producing three independent marine‐to‐freshwater transitions. Our results also indicate recent introgression of marine mitochondrial haplotypes into two freshwater clades, with more recurring instances of hybridization among Atlantic‐ versus Pacific‐slope species. In Pacific freshwater drainages, hybridization with a marine species appears to be geographically isolated and may be related to glaciation events. Substantial structural differences of estuarine gradients between these two geographical areas may have influenced the frequency, intensity and evolutionary effects of hybridization events.

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Climate change impacts on freshwater fishes: a Patagonian perspective

Cited by 15 publications

References 143 publications

New Insights into the Distribution, Physiology and Life Histories of South American Galaxiid Fishes, and Potential Threats to This Unique Fauna

New Insights into the Distribution, Physiology and Life Histories of South American Galaxiid Fishes, and Potential Threats to This Unique Fauna

Historical and Contemporary Diversity of Galaxiids in South America: Biogeographic and Phylogenetic Perspectives

Biogeography, habitat transitions and hybridization in a radiation of South American silverside fishes revealed by mitochondrial and genomic RAD data

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