Inter-annual variation in summer zooplankton community structure in Prydz Bay, Antarctica, from 1999 to 2006

doi:10.1007/s00300-010-0948-z

	Inter-annual variation in summer zooplankton community structure in Prydz Bay, Antarctica, from 1999 to 2006
	Yang, Guang 1,2; Li, Chaolun1 ; Sun, Song1
	2011-06-01
发表期刊	POLAR BIOLOGY
ISSN	0722-4060
卷号	34 期号:6 页码:921-932
文章类型	Article
摘要	Inter-annual variations in zooplankton community structure in Prydz Bay were investigated using multivariate analysis based on samples collected with a 330-mu m mesh, 0.5-m(2) Norpac net during the austral summer from 1999 to 2006. Two distinct communities, an oceanic and a neritic community, were consistently identified in all surveys. Oceanic communities had higher diversity and were indicated by species such as Haloptilus ocellatus, Heterorhabdus austrinus, Thysanoessa macrura, Rhincalanus gigas, Scolecithricella minor and Oikopleura sp.. Neritic communities were indicated by Euphausia crystallorophias and Stephos longipes and were characterized by fewer but more abundant species. In 1999 and 2006, a transitional community was also distinguished near the continental shelf edge, where ice coverage was more extensive than either the oceanic or neritic regions. Significant inter-annual variations in community structure (mainly involving species abundance rather than species composition) were found in both oceanic and neritic communities, being more obvious in the latter. The timing and amplitude of sea ice retreat (polynya appearance), and its effect on food availability, had strong influences on zooplankton community structure. In oceanic communities during years with earlier ice retreat, the extra time available for phytoplankton blooms to accumulate resulted in a higher proportion of large copepods (Calanoides acutus, Calanus propinquus, Metridia gerlachei) (especially the younger copepodites) in the zooplankton assemblage. In neritic communities, zooplankton such as the ice krill E. crystallorophias, and large copepods (C. acutus, C. propinquus, M. gerlachei), also showed higher abundance and earlier developmental stages in years with larger polynya. On the other hand, in years with later ice retreat, smaller polynya, and less time for phytoplankton blooms to form, the abundance of large copepods was lower and older age classes were more common.; Inter-annual variations in zooplankton community structure in Prydz Bay were investigated using multivariate analysis based on samples collected with a 330-mu m mesh, 0.5-m(2) Norpac net during the austral summer from 1999 to 2006. Two distinct communities, an oceanic and a neritic community, were consistently identified in all surveys. Oceanic communities had higher diversity and were indicated by species such as Haloptilus ocellatus, Heterorhabdus austrinus, Thysanoessa macrura, Rhincalanus gigas, Scolecithricella minor and Oikopleura sp.. Neritic communities were indicated by Euphausia crystallorophias and Stephos longipes and were characterized by fewer but more abundant species. In 1999 and 2006, a transitional community was also distinguished near the continental shelf edge, where ice coverage was more extensive than either the oceanic or neritic regions. Significant inter-annual variations in community structure (mainly involving species abundance rather than species composition) were found in both oceanic and neritic communities, being more obvious in the latter. The timing and amplitude of sea ice retreat (polynya appearance), and its effect on food availability, had strong influences on zooplankton community structure. In oceanic communities during years with earlier ice retreat, the extra time available for phytoplankton blooms to accumulate resulted in a higher proportion of large copepods (Calanoides acutus, Calanus propinquus, Metridia gerlachei) (especially the younger copepodites) in the zooplankton assemblage. In neritic communities, zooplankton such as the ice krill E. crystallorophias, and large copepods (C. acutus, C. propinquus, M. gerlachei), also showed higher abundance and earlier developmental stages in years with larger polynya. On the other hand, in years with later ice retreat, smaller polynya, and less time for phytoplankton blooms to form, the abundance of large copepods was lower and older age classes were more common.
关键词	Zooplankton Community Inter-annual Variation Prydz Bay Antarctic
学科领域	Biodiversity & Conservation ; Environmental Sciences & Ecology
DOI	10.1007/s00300-010-0948-z
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000290331300013
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/11675
专题	海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Yang, Guang,Li, Chaolun,Sun, Song. Inter-annual variation in summer zooplankton community structure in Prydz Bay, Antarctica, from 1999 to 2006[J]. POLAR BIOLOGY,2011,34(6):921-932.
APA	Yang, Guang,Li, Chaolun,&Sun, Song.(2011).Inter-annual variation in summer zooplankton community structure in Prydz Bay, Antarctica, from 1999 to 2006.POLAR BIOLOGY,34(6),921-932.
MLA	Yang, Guang,et al."Inter-annual variation in summer zooplankton community structure in Prydz Bay, Antarctica, from 1999 to 2006".POLAR BIOLOGY 34.6(2011):921-932.

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