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    Identifying the current and future status of freshwater connectivity corridors in the Amazon Basin

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    Authors
    Caldas, Bernardo
    Thieme, Michele L.
    Shahbol, Natalie
    Coelho, Maria E.
    Grill, Guenther
    Van Damme, Paul A.
    Aranha, Ricardo
    Cañas, Carlos
    Fagundes, Camila K.
    Franco-Leon, Nicole
    Herrera-Collazos, Edgar E.
    Jézéquel, Céline
    Montoya, Mariana
    Mosquera-Guerra, Frederico
    Oliveira-da-Costa, Marcelo
    Paschoalini, Mariana
    Petry, Paulo
    Oberdorff; Thierry
    Trujillo, Fernando
    Tedesco, Pablo A.
    de Brito Ribeiro, Mauro César Lambert
    Date
    2022-12
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    ISI journal
    Accessibility
    Open Access
    Usage rights
    CC-BY-4.0
    Metadata
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    Citation
    Caldas, B.; Thieme, M.L.; Shahbol, N.; Coelho, M.E.; Grill, G.; Van Damme, P.A.; Aranha, R.; Cañas, C.; Fagundes, C.K.; Franco-Leon, N.; Herrera-Collazos, E.E.; Jézéquel, C.; Montoya, M.; Mosquera-Guerra, F.; Oliveira-da-Costa, M.; Paschoalini, M.; Petry, P.; Oberdorff; T.; Trujillo, F.; Tedesco, P.A.; de Brito Ribeiro, M.C.L. (2022) Identifying the current and future status of freshwater connectivity corridors in the Amazon Basin. Conservation Science and Practice e12853 First Published (14 December 2022) 21 p. ISSN: 2578-4854
    Permanent link to cite or share this item: https://hdl.handle.net/10568/126100
    DOI: https://doi.org/10.1111/csp2.12853
    Abstract/Description
    The Amazon Basin features a vast network of healthy, free-flowing rivers, which provides habitat for the most biodiverse freshwater fauna of any basin globally. However, existing and future infrastructure developments, including dams, threaten its integrity by diminishing river connectivity, altering flows, or changing sediment regimes, which can impact freshwater species. In this study, we assess critical rivers that need to be maintained as freshwater connectivity corridors (FCCs) for selective freshwater species—long-distance migratory fishes and turtles (both with migrations >500 km) and river dolphins. We define FCCs as river stretches of uninterrupted river connectivity that provide important riverine and floodplain habitat for long-distance migratory and other species and that maintain associated ecosystem functions. We assessed more than 340,000 km of river, beginning with an assessment of the connectivity status of all rivers and then combining river status with models of occurrence of key species to map where FCCs occur and how they could be affected under a scenario of proposed dams. We identified that in 2019, 16 of 26 very long (>1000 km) rivers are free-flowing but only 9 would remain free-flowing if all proposed dams are built. Among long and very long rivers (>500 km), 93 are considered FCCs. Under the future scenario, one-fifth (18) of these long and very long FCCs—those that are of critical importance for long-distance migrants and dolphins—would lose their FCC status, including the Amazon, the Negro, Marañ on, Napo, Ucayali, Preto do Igap o Açu, Beni, and Uraricoera rivers. To avoid impacts of poorly sited infrastructure, we advocate for energy and water resources planning at the basin scale that evaluates alternative development options and limits development that will impact on FCCs. The results also highlight where corridors could be designated as protected from future fragmentation.
    CGIAR Impact Areas
    Environmental health and biodiversity
    Contributes to SDGs
    SDG 7 - Affordable and clean energy
    AGROVOC Keywords
    amazon river; freshwater; biodiversity; energy generation; amazonas (brasil); agua dulce; biodiversidad; generación de energía
    Subjects
    BIODIVERSITY;
    Organizations Affiliated to the Authors
    WWF; Confluvio GeoSpatial; Fundacion Faunagua; International Center for Tropical Agriculture; St. Johns River Water Management District; Wildlife Conservation Society; Universidade Federal do Pampa; Omacha Foundation; Pontificia Universidad Javeriana; Evolution et diversite biologique; Federal University of Juiz de Fora; The Nature Conservancy; Instituto Brasileiro de Geografia e Estatistica
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    • Alliance Bioversity CIAT Journal Articles [954]
    • Research Lever 2: Multifunctional Landscapes [452]

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