Evaluating taxonomic homogenization of freshwater fish assemblages in Chile

Vargas, Pamela V.; Arisméndi, Iván; Gomez‐Uchida, Daniel

doi:10.1186/s40693-015-0046-2

Cited by 25 publications

(26 citation statements)

References 59 publications

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“…A database of native fish species richness, latitude, longitude, climatic and hydrological data from 359 catchments was compiled from published sources (Benke & Cushing, 2005;Brosse et al, 2013;McGarvey & de Freitas Terra, 2016a;Vargas, Arismendi, & Gomez-Uchida, 2015), supplemented by information on river length and source elevation from online searches and Meybeck and Ragu (1996). These data are available in figshare (https://doi.org/10.6084/ m9.figshare.5616439).…”

Section: Datamentioning

confidence: 99%

Why does freshwater fish species richness differ between Pacific and Atlantic drainages of the Americas?

Griffiths

2018

Journal of Biogeography

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Aim To identify the contributions of geomorphological and hydrological/climatic factors to differences in total and endemic freshwater fish species richness between Atlantic and Pacific drainages. Location Glaciated and unglaciated catchments draining to the Atlantic and Pacific Oceans in North (NA) and South America (SA). Taxon Fish. Methods A database of native freshwater fish species richnesses in drainage basins was compiled from published information, and the contributions of temperature, rainfall, catchment area, river length, channel gradient, discharge and geographic location in accounting for variation in total and endemic species richness were assessed using boosted regression trees. Results Atlantic drainages have larger catchments, with longer rivers, lower channel gradients, greater discharges and lower flow variability than Pacific ones of the same size. Unglaciated Atlantic drainages in both NA and SA have more species than Pacific drainages, but glaciated Pacific NA had significantly more species than the other Pacific areas. Geographic location had the greatest influence on total richness, but catchment area, river length and temperature were more important for endemic species. Pacific drainages had proportionally more endemics than Atlantic drainages. Main conclusions Tectonically driven topographic change, by altering relief, affects catchment size, slopes and connectivity, with the latter also affected by climatic changes in ice cover and aridity. These geomorphic and long‐term climatic changes, by influencing speciation, extinction and dispersal, govern freshwater fish species richness in Atlantic and Pacific catchments.

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Section: Datamentioning

confidence: 99%

Why does freshwater fish species richness differ between Pacific and Atlantic drainages of the Americas?

Griffiths

2018

Journal of Biogeography

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“…Biological invasions along with aquaculture, climate change, environment alteration and fisheries drove fish biodiversity in South America in the past decades. Effects of these threats seem apparent when considering the decreasing beta diversity in South American ecosystems during the past decades (Blanco, Lui, Bertollo, Diniz, & Filho, 2010;Daga, Debona, Abilhoa, Gubiani, & Vitule, 2016;Petesse & Petrere, 2012;Vargas, Arismendi, & Gomez-Uchida, 2015;Vitule, Skóra, & Abilhoa, 2012). We were limited to discuss threats detected in the meta-analysis and evidence synthesis, both of which can be subjective in many aspects (please, see <royalsociety.org/topics-policy/projects/evidence-synthesis> for further information).…”

Section: Discussionmentioning

confidence: 99%

A network meta‐analysis of threats to South American fish biodiversity

et al. 2019

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While environmental alterations have made Homo sapiens the hyperkeystone species of the globe, biotic homogenization initiated a new era, the “Homogenocene.” Still, some terrestrial and aquatic ecosystems in South America are considered pristine and wild, which can lead to a general faith that economic progress is consistent with conservation strategies, even without scientific support. We compiled anthropogenic threats to fish biodiversity in a hierarchical meta‐analysis, along with an evidence synthesis of threats related to biological invasions, based on peer‐reviewed research with the aim to represent the actual conservation status of the South American ichthyofauna. We highlighted human‐related threats and synergistic effects of biological invasions, climate change, environmental alterations (e.g., pollution, aquaculture and damming) and fisheries. Considering measures that reinforce novel alien fish (e.g., artificial hybrids or genetically modified) introductions, it became clear why an eventual increase in local or regional species richness is not always beneficial to aquaculture, biodiversity, human well‐being or nature. In fact, citizens in all societal roles, including scientists, should revise their concepts about threats to fish biodiversity. Environmental policies require more than taxonomic diagnostics to achieve conservation goals under an incompatible scenario of a multiplying number of fish species and biotic homogenization. We advocate for countries in South America using science‐based strategies useful to maintain their social and economic growth along with their “remaining nature.” We live a crucial moment when the government overlooks threats to biodiversity and uses agribusiness as the most acceptable manner of fuelling the economy.

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“…Only 47 native and 27 non-native inland fish species are currently recognized in Chile, and 51 about 30% of these are thought to exhibit some tolerance for shifting between saline and freshwater 52 habitats (Dyer, 2000;Habit & Victoriano, 2005;Habit et al, 2006;Vila et al, 2011;Ministerio del 53 Medio Ambiente, 2013;Vargas et al, 2015). Furthermore, roughly 15% of these fishes are 54 hypothesized to display diadromous migratory behaviour (Table S1), compared to less than 1% for 55 fishes worldwide (Nelson, 2006).…”

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“…Given the high percentage of fishes in Chile hypothesized to exhibit some form of diadromy, 66 migration might play an important, yet unrecognized role in establishing national priorities of aquatic 67 biodiversity conservation. At present, a high percentage of the continental ichthyofauna in Chile is 68 categorized with some degree of conservation threat by Chilean environmental agencies and other 69 authors, although conservation categories can be incongruent and threats underestimated (Habit & 70 Victoriano, 2005; Diario Oficial de la Republica de Chile, 2008;Ministerio del Medio Ambiente, 2013;71 IUCN, 2015;Vargas et al, 2015). 72…”

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confidence: 99%

Otolith microchemistry identifies diadromous populations of Patagonian river fishes

Correa

Samaniego

et al. 2017

Preprint

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Compliance with Ethical StandardsOtolith analysis was funded by a RAC grant from the University of New Mexico, USA. The Government of Chile supported the drafting of this document with a CONICYT Doctoral Fellowship to D. Alò in 2015 and to C. Correa through grants CONICYT-PAI N°82130009, and FONDECYT-Iniciación en la Investigación N°11150990.All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. Specimens were collected under permits No. 3587, 29 December 2006, and No. 2886, 4 November 2008 (amendment No. 602, 12 February 2009) granted by the Chilean Subsecretary of Fishing to C. Correa. The McGill University Animal Care Committee (UACC), Animal Use Protocol No. 5291, approved use and handling of animals.AbstractCoastal habitats in Chile are hypothesized to support a number of diadromous fishes. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39-48°S). Otolith microchemistry data were analysed using a recursive partitioning approach to test for diadromy. Based on annular analysis of Sr:Ca ratios, a diadromous life history was detected for populations of native Aplochiton taeniatus, A. marinus, and Galaxias maculatus. Lifetime residency in freshwater was suggested for populations of A. zebra and G. platei. Among introduced salmonids, populations of Oncorhynchus tshawytscha and O. kisutch exhibited anadromous migratory patterns, whereas the population of O. mykiss screened appeared restricted to freshwater. Salmo trutta exhibited variable habitat use consistent with establishment of an ocean-type life history in some populations. The capacity and geographic scope of hydropower development is increasing and may disrupt migratory routes of diadromous fishes. Identification of diadromous species is a critical first step for preventing their loss due to hydropower development.

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Evaluating taxonomic homogenization of freshwater fish assemblages in Chile

Cited by 25 publications

References 59 publications

Why does freshwater fish species richness differ between Pacific and Atlantic drainages of the Americas?

Why does freshwater fish species richness differ between Pacific and Atlantic drainages of the Americas?

A network meta‐analysis of threats to South American fish biodiversity

Otolith microchemistry identifies diadromous populations of Patagonian river fishes

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