Impact of a dipole on the phytoplankton community in a semi-enclosed basin of the southern Gulf of California, Mexico

• Autorzy: Durán-Campos Elizabeth , Monreal-Gómez María Adela , Salas de León David Alberto , Coria-Monter Erik

Identyfikatory

DOI

10.1016/j.oceano.2019.01.004

• Języki publikacji: EN

Abstrakty

EN

The present study assesses the impact of a dipole on the abundance and distribution of phytoplankton groups as well as the chlorophyll-a concentration in the Bay of La Paz, Gulf of California, Mexico. Based on in situ observations obtained in a multidisciplinary research cruise during the summer of 2008, a mesoscale dipole (cyclone-anticyclone) was observed; the cyclone had ~25 km diameter and tangential speed of ~45 cm s^-1, while the anticyclone had ~15 km diameter and tangential speed of ~40 cm s^-1. Strong gradients in conservative temperature and density were observed between both structures, suggesting the presence of an oceanic thermohaline front. Differences in phytoplankton distribution showed minimum abundance of diatoms in the southern bay and close to Roca Partida Island, and maximum in the periphery in the northern cold core. The maximum abundance of dinoflagellates and silicoflagellates occurred at the frontal zone. The chlorophyll-a concentration was high in the region associated with the frontal zone. Although mesoscale eddies are ubiquitous processes in the Bay of La Paz, this study represents the first observational report of the impacts of a dipole on the phytoplankton structure and chlorophyll-a in the region. The observations presented here indicate the existence of a strong association between the mesoscale processes and the phytoplankton community in the study area. This study highlights the value of efforts to improve projections of physical forcing and its influence on the planktonic ecosystem.

Słowa kluczowe

EN

dipole; oceanic thermohaline front; phytoplankton; chlorophyll-a; Gulf of California; Bay of La Paz

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2019
• Tom: No. 61 (3)
• Strony: 331--340
• Opis fizyczny: Bibliogr. 39 poz., mapa, rys.

Twórcy

autor

Durán-Campos Elizabeth

• DGAPA Postdoctoral Fellowship, Institute of Marine Sciences and Limnology (ICML), National Autonomous University of Mexico (UNAM), Mexico City, Mexico

autor

Monreal-Gómez María Adela

• Ecology and Aquatic Biodiversity Academic Unit, Institute of Marine Sciences and Limnology (ICML), National Autonomous University of Mexico (UNAM), Mexico City, Mexico

autor

Salas de León David Alberto

• Ecology and Aquatic Biodiversity Academic Unit, Institute of Marine Sciences and Limnology (ICML), National Autonomous University of Mexico (UNAM), Mexico City, Mexico

autor

Coria-Monter Erik

• Cátedras CONACYT, Institute of Marine Sciences and Limnology (ICML), National Autonomous University of Mexico (UNAM), Mexico City, Mexico

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).