| Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China |
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| 作者姓名： | LIU Haibin ZHANG Zhinan FAN Shiliang HUA Er DENG Ke |
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| 作者单位： | LIU Haibin（College of Marine Life Science,Ocean University of China,Qingdao 266003,China;Liaocheng Agricuhure Bureau,Liaocheng 252000,China） ;
ZHANG Zhinan（College of Marine Life Science,Ocean University of China,Qingdao 266003,China） ;
FAN Shiliang（College of Marine Life Science,Ocean University of China,Qingdao 266003,China） ;
HUA Er（College of Marine Life Science,Ocean University of China,Qingdao 266003,China） ;
DENG Ke（College of Marine Life Science,Ocean University of China,Qingdao 266003,China） ; |
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| 摘 要： | Nematode assemblage composition, trophic structure and biodiversity were followed over an annual cycle in a sandy beach of the Taiping Bay of Qingdao, China. Nematode assemblage in the sandy beach maintained a high genus diversity （75 genera）. Mlero- laimus and Bathylaimus were the dominant genus of the nematode assemblage, accounting for 66% of the total nematode abundance. The nematodes＇ dominant trophic structure changed seasonally as a response to the seasonal changes in food quality. Epigrowth-feeder nematodes （2A） were the dominant trophic groups in the trophic structure with the highest abundance in spring because of phytoplankton bloom, while the feeding type （ 1 B） showed higher abundance in summer that was due to the increasing of sediment detritus after spring bloom. Furthermore, species diversity and evenness calculated on nematodes identified to the genus level displayed significant temporal changes, which was also reflected by the index of trophic diversity. According to the cluster analysis, the nematode community structure of the whole year was clearly separated into two periods （A and B）. Biota-Envlron- ment matching （BIOENV） results showed that seawater temperature, sediment Chl a and grain size were responsible for the nema- tode community structure variation in spring and summer period （Period A）. However, seawater/interstitial water temperature, interstitial water dissolved oxygen concentration,interstitial water salinity, and sediment Ph a a were more important in constructing the autumn and winter period （Period B） nematode community structure.
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| 关 键 词： | 线虫 海洋生物 营养结构 季节变化 青岛 太平湾 |
| 收稿时间： | 2007/2/12 0:00:00 |
| 修稿时间： | 2007/7/30 0:00:00 |
Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China |
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| LIU Haibin,ZHANG Zhinan,FAN Shiliang,HUA Er,DENG Ke.Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China[J].Acta Oceanologica Sinica,2008,27(2):102-115. |
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| Authors: | LIU Haibin ZHANG Zhinan FAN Shiliang HUA Er and DENG Ke |
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| Institution: | 1.College of Marine Life Science, Ocean University of China, Qingdao 266003, China;Liaocheng Agriculture Bureau, Liaocheng 252000, China2.College of Marine Life Science, Ocean University of China, Qingdao 266003, China |
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| Abstract: | Nematode assemblage composition,trophic structure and biodiversity were followed over an annual cycle in a sandy beach of the Taiping Bay of Qingdao,China.Nematode assemblage in the sandy beach maintained a high genus diversity (75 genera).Micro-laimus and Bathylaimus were the dominant genus of the nematode assemblage,accounting for 66% of the total nematode abun-dance.The nematodes' dominant trophic structure changed seasonally as a response to the seasonal changes in food quality.Epi-growth-feeder nematodes (2A) were the dominant trophic groups in the trophic structure with the highest abundance in spring be-cause of phytoplankton bloom,while the feeding type (1B) showed higher abundance in summer that was due to the increasing of sediment detritus after spring bloom.Furthermore,species diversity and evenness calculated on nematodes identified to the genus level displayed significant temporal changes,which was also reflected by the index of trophic diversity.According to the cluster analysis,the nematode community structure of the whole year was clearly separated into two periods ( A and B).Biota-Environ-ment matching (BIOENV) results showed that seawater temperature,sediment Chl a and grain size were responsible for the nema-tode community structure variation in spring and summer period (Period A).However,seawater/interstitial water temperature,interstitial water dissolved oxygen concentration,interstitial water salinity,and sediment Ph a a were more important in construc-ting the autumn and winter period ( Period B) nematode community structure. |
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| Keywords: | nematode assemblage composition trophic structure temporal change Taiping Bay of Qingdao |
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