Decline and recovery of pelagic acoustic backscatter following El Niño events in the Gulf of California, Mexico

Elan J. Portner,Kelly J. Benoit-Bird,Elliott L. Hazen,Chad M. Waluk,Carlos J. Robinson,Jaime Gómez-Gutiérrez,William F. Gilly

Progress in Oceanography（2022）

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摘要

•Timeseries of acoustic backscatter as a proxy for midtrophic biomass in the Gulf of California.•ENSO explained more variability than regional temperature or chlorophyll concentration.•Backscatter decreased significantly during the positive phase of ENSO (El Niño).•Mean backscatter took more than two years to recover to pre-El Niño levels.

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关键词

Hydroacoustic,Backscattering layers,Midtrophic communities,Generalized additive models,El Niño Southern Oscillation

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