| LIAN Xiping,TAN Yehui,HUANG Liangmin,ZHOU Linbin. 2017. Striking taxonomic differences in summer zooplankton in the northern South China Sea:implication of an extreme cold anomaly. Acta Oceanologica Sinica, 36(10):87－96 |
| Striking taxonomic differences in summer zooplankton in the northern South China Sea:implication of an extreme cold anomaly |
| 2008年初冷事件对南海北部夏季浮游动物的影响 |
| Received:June 27, 2016 |
| DOI：10.1007/s13131-017-0975-5 |
| Key words:zooplankton community cold anomaly northern South China Sea |
| 中文关键词: 浮游动物 群落结构 冷异常 南海北部 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LIAN Xiping | Key Laboratory of Marine Bio-resource Sustainable Utilization(LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | TAN Yehui | Key Laboratory of Marine Bio-resource Sustainable Utilization(LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | tanyh@scsio.ac.cn | | HUANG Liangmin | Key Laboratory of Marine Bio-resource Sustainable Utilization(LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | ZHOU Linbin | Key Laboratory of Marine Bio-resource Sustainable Utilization(LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | |
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| Abstract: |
| An extreme persistent cold anomaly was prevailing in the South China Sea in February 2008. In order to understand the effect of the cold anomaly on zooplankton community, the zooplankton composition, abundance and biomass were analyzed in the northern South China Sea in August 2007 and August 2008. A total of 467 zooplankton species representing 16 groups were identified, with 275 species in August 2007 and 351 in August 2008. Copepods were the most dominant zooplankton group in the study area. Compared with 2007, a dramatic decline was observed in the abundance of four dominant copepod species:Subeucalanus subcrassus, Temora discaudata, Nannocalanus minor and Temora turbinata in 2008. Moreover, zooplankton abundance declined from 133.37 ind./m3 in August 2007 to 75.49 ind./m3 in August 2008. In contrast, the abundance of medusa, such as Diphyes chamissonis, and tunicate, such as Doliolum denticulatum and Dolioletta gegenbauri, increased during the same season. Cluster analysis showed that there was a difference in zooplankton community structure between the two years. These variations in zooplankton communities were indicative of an anomalous oceanographic condition along with the extreme cold event in 2008. |
| 中文摘要: |
| 2008年初，我国南方出现了罕见的低温冰冻极端天气过程。通过对2007年8月和2008年8月南海北部现场调查所获得的数据分析研究了浮游动物种类组成。结果表明，与2007年8月相比2008年8月浮游动物丰度和生物量有很大的下降。聚类分析结果表明浮游动物群落被分为近岸和远海两大类群。浮游动物近岸类群和远岸类群的分界点在不同的时间有所不同，这是由于外海水向近岸的入侵所致。与2007年8月相比，2008年8月浮游动物优势种发生了很大的演替，主要是因为四种浮游动物优势种亚强真哲水蚤、异尾宽水蚤、锥形宽水蚤和小哲水蚤丰度急剧下降所致。相反，水母类和海樽类丰富有很大的升高，其原因可能是2008年春季极端低温导致的鱼类大量死亡所致。与远岸浮游动物群落相比，近岸浮游动物群落变化更剧烈，这说明近岸浮游动物群落结构不稳定。南海北部浮游动物群落结构的变化与2008年初的冷事件有很大关系。 |
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