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2019 | OriginalPaper | Buchkapitel

27. Chile and the Salas y Gómez Ridge

verfasst von : Erin E. Easton, Matthias Gorny, Ariadna Mecho, Javier Sellanes, Carlos F. Gaymer, Heather L. Spalding, Jaime Aburto

Erschienen in: Mesophotic Coral Ecosystems

Verlag: Springer International Publishing

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Abstract

In Chile, light-dependent benthic taxa have been observed to ~280 m with the presence of zooxanthellate cnidarians forming mesophotic coral ecosystems (MCEs) to depths of at least 120 m at Rapa Nui (Easter Island) and Salas y Gómez. Evidence from dredge samples suggests MCEs in the southeast Pacific once extended along the Salas y Gómez Ridge as far east as ~85° W, but MCEs in Chile were virtually unexplored prior to 2010. Despite providing critical structural habitat for numerous flora and fauna, including commercially important fishes, basic information about their geographic distribution and community structure are lacking. Here, we review the state of knowledge on these communities and present preliminary results from the most recent surveys at Rapa Nui. Surveys at mesophotic depths (30–280 m) have revealed ecosystems dominated by crustose coralline algae with occasional patches of rhodoliths, undiscovered biodiversity, the first reports of wide-ranging Pacific species, and reports of potential new species in multiple taxa including fishes and echinoderms. Preliminary observations suggest fish communities change with depth and time of day, some habitats support commercially important and juvenile fishes, and MCEs and fisheries at Rapa Nui are in decline due to local, artisanal fishing practices. The recent designation of no-take marine parks in Chile may help to conserve these habitats, but additional information is required to support management decisions and future conservation efforts at Rapa Nui, Salas y Gómez, and seamounts within the Chilean Exclusive Economic Zone.

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Titel: Chile and the Salas y Gómez Ridge
verfasst von: Erin E. Easton
Matthias Gorny
Ariadna Mecho
Javier Sellanes
Carlos F. Gaymer
Heather L. Spalding
Jaime Aburto
Verlag: Springer International Publishing
Buch: Mesophotic Coral Ecosystems
Print ISBN: 978-3-319-92734-3

Electronic ISBN: 978-3-319-92735-0

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-319-92735-0_27