期刊
ESTUARINE COASTAL AND SHELF SCIENCE
卷 81, 期 1, 页码 114-122出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ecss.2008.10.004
关键词
primary production; carbon dioxide; kelp; antarctic zone; kerguelen; Macrocyctis pyrifera; 49 degrees 27 ' S-70 degrees 03 ' E
资金
- Institut Paul-Emile Victor
- Belgian Science Policy [A4/DD/B14, EV/7/12E, SD/CA/03A]
- FNRS
The partial pressure of CO2 (pCO(2)) and dissolved inorganic carbon (DIC) were monitored in shallow coastal waters located inside and outside giant kelp beds (Macrocystis pyrifera) located in the Kerguelen Archipelago (Southern Ocean). Photosynthesis and respiration by microplankton and kelp lead to marked pCO(2) and DIC diel cycles. Daily variations of pCO(2) and DIC are significant in the spring and summer, but absent in the winter, reflecting the seasonal cycle of biological activity in the kelp beds. If the kelp beds seem to favour the onset of phytoplankton blooms, most of the primary production inside the kelp beds is due to the kelp itself The primary production of Macrocystis kelp beds in the Sub-Antarctic high-nutrient, low-chlorophyll (HNLC) waters off the Kerguelen Archipelago is elevated and closely linked to light availability. This production is significant from October to March and reaches its climax in December at the solar radiation maximum. (C) 2008 Elsevier Ltd. All rights reserved.
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