Carbon export through zooplankton active flux in the Canary Current
| Autor: | P. Bécognée, Ángeles Marrero-Díaz, Lidia Yebra, Santiago Hernández-León, C. Almeida, Javier Arístegui, Sebastien Putzeys |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Daytime Diel vertical migration 010504 meteorology & atmospheric sciences Canary current Aquatic Science Oceanography Active flux 01 natural sciences Zooplankton Water column Ocean gyre Transect Respiratory flux Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences geography geography.geographical_feature_category Carbon pump 010604 marine biology & hydrobiology Plankton Upwelling Environmental science |
| Zdroj: | Journal of Marine Systems. 189:12-21 |
| ISSN: | 0924-7963 |
| Popis: | Zooplankton vertical distribution, migrant biomass, and respiratory flux were studied in two transects performed in the Canary Current at 21°N and 26°N from the eu- and mesotrophic upwelling zone off Northwest Africa to the oligotrophic central gyre waters. Migrant biomass was estimated by sampling during day and night using a Longhurst-Hardy Plankton Recorder (LHPR) net in the 0–900 m depth water column. The electron transfer system (ETS) enzymatic activity was measured as a proxy for zooplankton respiration in the 0–900 m depth water column. Respiratory flux was obtained from the migrant biomass and the daytime respiration in the 200–800 m layer, assumed as the residence depth of migrant zooplankton. The southern transect at 21°N showed higher primary production, zooplankton biomass, migrant biomass, and lower passive flux. Zooplankton respiratory flux varied from 2.8 to 88.3% of the POC flux, being lower in the northern (5.3% ±2.7) than in the southern transect (46.1% ±32.9). Migrant biomass was significantly correlated to primary production (r2 = 0.570, p |
| Databáze: | OpenAIRE |
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