TY - JOUR
T1 - The evolving response of mesopelagic fishes to declining midwater oxygen concentrations in the southern and central California Current
AU - Koslow, J. Anthony
AU - Davison, Pete
AU - Ferrer, Erica
AU - Jiménez Rosenberg, S. Patricia A.
AU - Aceves-Medina, Gerardo
AU - Watson, William
AU - Hidalgo, Manuel
N1 - Publisher Copyright:
© 2018 International Council for the Exploration of the Sea. All rights reserved.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Declining oxygen concentrations in the deep ocean, particularly in areas with pronounced oxygen minimum zones (OMZs), are a growing global concern related to global climate change. Its potential impacts on marine life remain poorly understood. A previous study suggested that the abundance of a diverse suite of mesopelagic fishes off southern California was closely linked to trends in midwater oxygen concentration. This study expands the spatial and temporal scale of that analysis to examine how mesopelagic fishes are responding to declining oxygen levels in the California Current (CC) off central, southern, and Baja California. Several warm-water mesopelagic species, apparently adapted to the shallower, more intense OMZ off Baja California, are shown to be increasing despite declining midwater oxygen concentrations and becoming increasingly dominant, initially off Baja California and subsequently in the CC region to the north. Their increased abundance is associated with warming near-surface ocean temperature, the warm phase of the Pacific Decadal oscillation and Multivariate El Ninõ-Southern Oscillation Index, and the increased flux of Pacific Equatorial Water into the southern CC.
AB - Declining oxygen concentrations in the deep ocean, particularly in areas with pronounced oxygen minimum zones (OMZs), are a growing global concern related to global climate change. Its potential impacts on marine life remain poorly understood. A previous study suggested that the abundance of a diverse suite of mesopelagic fishes off southern California was closely linked to trends in midwater oxygen concentration. This study expands the spatial and temporal scale of that analysis to examine how mesopelagic fishes are responding to declining oxygen levels in the California Current (CC) off central, southern, and Baja California. Several warm-water mesopelagic species, apparently adapted to the shallower, more intense OMZ off Baja California, are shown to be increasing despite declining midwater oxygen concentrations and becoming increasingly dominant, initially off Baja California and subsequently in the CC region to the north. Their increased abundance is associated with warming near-surface ocean temperature, the warm phase of the Pacific Decadal oscillation and Multivariate El Ninõ-Southern Oscillation Index, and the increased flux of Pacific Equatorial Water into the southern CC.
KW - California Current
KW - deoxygenation
KW - ichthyoplankton
KW - mesopelagic fishes
KW - oxygen minimum zone
KW - Pacific Decadal Oscillation
UR - http://www.scopus.com/inward/record.url?scp=85067839878&partnerID=8YFLogxK
U2 - 10.1093/icesjms/fsy154
DO - 10.1093/icesjms/fsy154
M3 - Artículo
AN - SCOPUS:85067839878
SN - 1054-3139
VL - 76
SP - 626
EP - 638
JO - ICES Journal of Marine Science
JF - ICES Journal of Marine Science
IS - 3
ER -