TY - JOUR
T1 - Copepod species assemblage and carbon biomass during two anomalous warm periods of distinct origin during 2014–2015 in the southern Gulf of California
AU - Beltrán-Castro, Juan R.
AU - Hernández-Trujillo, Sergio
AU - Gómez-Gutiérrez, Jaime
AU - Trasviña-Castro, Armando
AU - González-Rodríguez, Eduardo
AU - Aburto-Oropeza, Octavio
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12/16
Y1 - 2020/12/16
N2 - Copepod species assemblage and biomass were studied during a weekly time series done during an anomalously warm and low sea surface Chlorophyll-a concentration period 2014–2015, compared with 2002–2018, at Cabo Pulmo National Park, Gulf of California, Mexico. Forty-nine copepod species accounted for 64% of the total zooplankton abundance. Three small copepods (Oncaea venusta 12.6%, Paracalanus parvus 11.5%, Clausocalanus jobei 8.6%) out of 45 species numerically dominated during 2014. The large copepods Subeucalanus subtenuis and Subeucalanus subcrassus out of 38 species recorded during 2015 increased in abundance accounting for 69% of copepod Carbon biomass. A Canonical Correspondence Analysis demonstrated SST drove copepod species assemblages. Copepod abundance was significantly higher during the cold (Nov–May) that during the warm (Jun–Oct) season and lower during Jan–Aug 2014 regional heatwave than during the Equatorial El Niño (Nov 2014–Dec 2015). Acartia tonsa was the only significant species indicator during the 2014 regional heatwave and Clausocalanus furcatus, Copilia mirabilis, and Cosmocalanus darwinii were significant species indicators of El Niño 2015. Copepod species assemblage had 87% tropical species during the Jan–Aug 2014 due to the regional heatwave that started the tropicalization of copepod community increasing to 95% of tropical species during El Niño 2015.
AB - Copepod species assemblage and biomass were studied during a weekly time series done during an anomalously warm and low sea surface Chlorophyll-a concentration period 2014–2015, compared with 2002–2018, at Cabo Pulmo National Park, Gulf of California, Mexico. Forty-nine copepod species accounted for 64% of the total zooplankton abundance. Three small copepods (Oncaea venusta 12.6%, Paracalanus parvus 11.5%, Clausocalanus jobei 8.6%) out of 45 species numerically dominated during 2014. The large copepods Subeucalanus subtenuis and Subeucalanus subcrassus out of 38 species recorded during 2015 increased in abundance accounting for 69% of copepod Carbon biomass. A Canonical Correspondence Analysis demonstrated SST drove copepod species assemblages. Copepod abundance was significantly higher during the cold (Nov–May) that during the warm (Jun–Oct) season and lower during Jan–Aug 2014 regional heatwave than during the Equatorial El Niño (Nov 2014–Dec 2015). Acartia tonsa was the only significant species indicator during the 2014 regional heatwave and Clausocalanus furcatus, Copilia mirabilis, and Cosmocalanus darwinii were significant species indicators of El Niño 2015. Copepod species assemblage had 87% tropical species during the Jan–Aug 2014 due to the regional heatwave that started the tropicalization of copepod community increasing to 95% of tropical species during El Niño 2015.
KW - Cabo Pulmo National Park
KW - El Niño
KW - Heatwave
KW - Seasonal succession
KW - The Blob
UR - http://www.scopus.com/inward/record.url?scp=85090201374&partnerID=8YFLogxK
U2 - 10.1016/j.csr.2020.104215
DO - 10.1016/j.csr.2020.104215
M3 - Artículo
AN - SCOPUS:85090201374
SN - 0278-4343
VL - 207
JO - Continental Shelf Research
JF - Continental Shelf Research
M1 - 104215
ER -