Effects of increased pCO(2) and temperature on the North Atlantic spring bloom. I. The phytoplankton community and biogeochemical response

doi:10.3354/meps08133

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	Effects of increased pCO(2) and temperature on the North Atlantic spring bloom. I. The phytoplankton community and biogeochemical response
	Feng, Yuanyuan 1; Hare, Clinton E.1; Leblanc, Karine 1; Rose, Julie M.1; Zhang, Yaohong 1; DiTullio, Giacomo R.2; Lee, Peter A.2; Wilhelm, Steven W.3; Rowe, Janet M.3; Sun, Jun 4
刊名	MARINE ECOLOGY PROGRESS SERIES
	2009
卷号	388 页码:13-25
关键词	Ocean Acidification Global Change Carbon Dioxide Temperature Coccolithophores Diatoms Calcification North Atlantic Bloom
ISSN号	0171-8630
DOI	10.3354/meps08133
文献子类	Article
英文摘要	The North Atlantic spring bloom is one of the largest annual biological events in the ocean, and is characterized by dominance transitions from siliceous (diatoms) to calcareous (coccolithophores) algal groups. To study the effects of future global change on these phytoplankton and the biogeochemical cycles they mediate, a shipboard continuous culture experiment (Ecostat) was conducted in June 2005 during this transition period. Four treatments were examined: (1) 12 degrees C and 390 ppm CO2 (ambient control), (2) 12 degrees C and 690 ppm CO2 (high pCO(2)) (3) 16 degrees C and 390 ppm CO2 (high temperature), and (4) 16 degrees C and 690 ppm CO2 ('greenhouse'). Nutrient availability in all treatments was designed to reproduce the low silicate conditions typical of this late stage of the bloom. Both elevated pCO(2) and temperature resulted in changes in phytoplankton community structure. Increased temperature promoted whole community photosynthesis and particulate organic carbon (POC) production rates per unit chlorophyll a. Despite much higher coccolithophore abundance in the greenhouse treatment, particulate inorganic carbon production (calcification) was significantly decreased by the combination of increased pCO(2) and temperature. Our experiments suggest that future trends during the bloom could include greatly reduced export of calcium carbonate relative to POC, thus providing a potential negative feedback to atmospheric CO2 concentration. Other trends with potential climate feedback effects include decreased community biogenic silica to POC ratios at higher temperature. These shipboard experiments suggest the need to examine whether future pCO2 and temperature increases on longer decadal timescales will similarly alter the biological and biogeochemical dynamics of the North Atlantic spring bloom.; The North Atlantic spring bloom is one of the largest annual biological events in the ocean, and is characterized by dominance transitions from siliceous (diatoms) to calcareous (coccolithophores) algal groups. To study the effects of future global change on these phytoplankton and the biogeochemical cycles they mediate, a shipboard continuous culture experiment (Ecostat) was conducted in June 2005 during this transition period. Four treatments were examined: (1) 12 degrees C and 390 ppm CO2 (ambient control), (2) 12 degrees C and 690 ppm CO2 (high pCO(2)) (3) 16 degrees C and 390 ppm CO2 (high temperature), and (4) 16 degrees C and 690 ppm CO2 ('greenhouse'). Nutrient availability in all treatments was designed to reproduce the low silicate conditions typical of this late stage of the bloom. Both elevated pCO(2) and temperature resulted in changes in phytoplankton community structure. Increased temperature promoted whole community photosynthesis and particulate organic carbon (POC) production rates per unit chlorophyll a. Despite much higher coccolithophore abundance in the greenhouse treatment, particulate inorganic carbon production (calcification) was significantly decreased by the combination of increased pCO(2) and temperature. Our experiments suggest that future trends during the bloom could include greatly reduced export of calcium carbonate relative to POC, thus providing a potential negative feedback to atmospheric CO2 concentration. Other trends with potential climate feedback effects include decreased community biogenic silica to POC ratios at higher temperature. These shipboard experiments suggest the need to examine whether future pCO2 and temperature increases on longer decadal timescales will similarly alter the biological and biogeochemical dynamics of the North Atlantic spring bloom.
学科主题	Ecology ; Marine & Freshwater Biology ; Oceanography
URL标识	查看原文
语种	英语
WOS记录号	WOS:000269892700003
公开日期	2010-12-22
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/2603]
专题	海洋研究所_海洋生态与环境科学重点实验室
作者单位	1.Univ Delaware, Coll Marine & Earth Studies, Lewes, DE 19958 USA 2.Coll Charleston, Hollings Marine Lab, Charleston, SC 29412 USA 3.Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 5.Univ British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V6T 1Z4, Canada 6.Alfred Wegener Inst Polar & Marine Res, D-27568 Bremerhaven, Germany 7.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA
推荐引用方式 GB/T 7714	Feng, Yuanyuan,Hare, Clinton E.,Leblanc, Karine,et al. Effects of increased pCO(2) and temperature on the North Atlantic spring bloom. I. The phytoplankton community and biogeochemical response[J]. MARINE ECOLOGY PROGRESS SERIES,2009,388:13-25.
APA	Feng, Yuanyuan.,Hare, Clinton E..,Leblanc, Karine.,Rose, Julie M..,Zhang, Yaohong.,...&Hutchins, David A..(2009).Effects of increased pCO(2) and temperature on the North Atlantic spring bloom. I. The phytoplankton community and biogeochemical response.MARINE ECOLOGY PROGRESS SERIES,388,13-25.
MLA	Feng, Yuanyuan,et al."Effects of increased pCO(2) and temperature on the North Atlantic spring bloom. I. The phytoplankton community and biogeochemical response".MARINE ECOLOGY PROGRESS SERIES 388(2009):13-25.