| LIU Haibin,ZHANG Zhinan,FAN Shiliang,HUA Er,DENG Ke. 2008. Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China. Acta Oceanologica Sinica, (2):102－115 |
| Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China |
| Seasonal variability in free-living marine nematode community structure in a sandy beach of the Taiping Bay of Qingdao, China |
| Received:February 12, 2007 Revised:July 30, 2007 |
| DOI： |
| Key words:nematode assemblage composition trophic structure temporal change Taiping Bay of Qingdao |
| 中文关键词: nematode assemblage composition trophic structure temporal change Taiping Bay of Qingdao |
| 基金项目:The National Natural Science Foundation of China under contract No. 40576061. |
| Author Name | Affiliation | E-mail | | LIU Haibin | College of Marine Life Science, Ocean University of China, Qingdao 266003, China
Liaocheng Agriculture Bureau, Liaocheng 252000, China | | | ZHANG Zhinan | College of Marine Life Science, Ocean University of China, Qingdao 266003, China | znzhang@oue.edu.cn | | 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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| 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).Microlaimus 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 (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-Environment matching (BIOENV) results showed that seawater temperature, sediment Chl a and grain size were responsible for the nematode 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 moreimportant in constructing the autumn and winter period (Period B) nematode community structure. |
| 中文摘要: |
| 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).Microlaimus 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 (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-Environment matching (BIOENV) results showed that seawater temperature, sediment Chl a and grain size were responsible for the nematode 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 moreimportant in constructing the autumn and winter period (Period B) nematode community structure. |
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