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学科主题: Marine & Freshwater Biology ; Oceanography
题名: A 2011 drought event affecting distribution of nutrients and chlorophyll in the Zhujiang River estuary
作者: Shi, Z ; Huang, XP ; Zhang, X ; Ye, F ; Liang, XM ; Ni, ZX ; Cai, WX
通讯作者: xphuang@scsio.ac.cn
关键词: extreme drought ; nutrient behavior ; nutrient regeneration ; chlorophyll a ; Zhujiang (Pearl) River estuary
刊名: CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
发表日期: 2014
卷: 32, 期:2, 页:433-443
收录类别: sci
部门归属: [Shi Zhen ; Huang Xiaoping ; Zhang Xia ; Ye Feng ; Liang Ximei ; Ni Zhixin] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine BioResources & Ecol, Guangzhou 510301, Guangdong, Peoples R China ; [Shi Zhen] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Shi Zhen ; Liang Ximei ; Ni Zhixin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; [Ye Feng] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China ; [Ni Zhixin ; Cai Weixu] State Ocean Adm, South China Sea Environm Monitoring Ctr, Guangzhou 510300, Guangdong, Peoples R China
项目归属: LTO
资助者: Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11020205]; National Natural Science Foundation of China [41076069, 40776086]; Knowledge Innovation Program of Chinese Academy of Sciences [KZCX2-YW-Q07]; National 908 Special Project of China [GD908-JC-06]
摘要: During the summer of 2011, a severe drought event occurred throughout the Zhujiang (Pearl) River Basin of South China. This decreased runoff into the river, resulting in increased salinity and reduced suspended substance. To examine the effects of this extreme drought on the distribution of nutrients and chlorophyll, we compared two surveys from 2006 and 2011. Results show that dissolved inorganic nitrogen concentration did not change from 2006 to 2011, whereas the proportions of NO (2) (-) and NH (4) (+) to DIN in 2011 increased. PO (4) (3-) concentration was lower in 2011 than in 2006, whereas there was no difference in SiO (3) (2-) concentration between these years. Correlation coefficients of salinity with levels of NO (3) (-) , NO (2) (-) , NH (4) (+) , PO (4) (3-) and SiO (3) (2-) in 2011 were all much higher than those in 2006, suggesting greater conservation of dissolved nutrients during the extreme drought event. Furthermore, calculated amounts of regenerated nitrate and phosphorus and their proportions to observed nutrients in 2011 were much lower than in 2006, indicating that nutrient regeneration decreased during the extreme drought period. Mean concentration of chlorophyll a (Chl-a) was considerably higher in 2011 than in 2006, and a harmful algal bloom of Cochlodinium geminatum was observed in the estuary, owing to water stagnancy and lower turbidity as a consequence of drought. Therefore, the extreme drought event in 2011 changed the composition ratio of nutrients, enhanced nutrient conservative behavior, and reduced nutrient regeneration. This affected some key ecological processes in the estuary.
原文出处: 查看原文
WOS记录号: WOS:000332739600021
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10570
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Shi, Z; Huang, XP; Zhang, X; Ye, F; Liang, XM; Ni, ZX; Cai, WX.A 2011 drought event affecting distribution of nutrients and chlorophyll in the Zhujiang River estuary,CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014,32(2):433-443
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