| 摘要: |
| 本研究根据2012—2016年8月浙江北部海域大型底栖动物的调查资料，对浙江北部海域4个区域（杭州湾、舟山海域、象山海域和近海区域）的大型底栖动物优势种的时空变化进行了研究。结果表明，5个航次大型底栖动物优势种有29种（优势度>0.02），其中多毛类动物13种，软体动物7种，甲壳动物2种，鱼类2种，纽形动物2种，棘皮动物2种以及刺胞动物1种。对浙江北部海域大型底栖动物优势种的时空分布进行分析，结果表明：杭州湾优势种种类最少，时空分布变化明显；近海优势种组成较复杂，包含甲壳动物、软体动物、多毛类动物、鱼类、棘皮动物和纽形动物；象山海域的优势种组成较简单，优势种以多毛类动物为主；舟山海域的优势种中多毛类动物种类数逐年增加。对研究区域大型底栖动物优势种的变化趋势进行分析，浙江北部海域大型底栖动物优势种中多毛类动物明显增加，取代该海域软体动物优势地位。大型底栖动物优势种的时空分布变化与有机质积累、底质环境改变以及食物网变化密切相关，浙江北部海域的生态环境状况在不断恶化。 |
| 关键词: 浙江北部 大型底栖动物 优势种 时空分布 |
| DOI：10.11693/hyhz20191200253 |
| 分类号:Q958.8 |
| 基金项目:国家自然科学基金项目，41676139号 |
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| TEMPORAL AND SPATIAL DISTRIBUTION OF DOMINANT MACROZOOBENTHOS SPECIES IN THE SEA AREA OFF NORTHERN ZHEJIANG PROVINCE |
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YAN Run-Xuan1, FENG Ming2, WANG Xiao-Bo2, HAN Qing-Xi1
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1.School of Marine Sciences, Ningbo University, Ningbo 315211, China;2.Marine Environmental Monitoring Centre of Ningbo, SOA, Ningbo 315012, China
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| Abstract: |
| Based on macrozoobenthos collected during 2012—2016 in four areas (Hangzhou Bay, Xiangshan area, Zhoushan area, and the offshore area) in the sea off northern Zhejiang Province, the variation of the dominant macrozoobenthos were analyzed. A total of 29 dominant species were determined, including polychaetes (13 species), mollusks (7 species), crustaceans (2 species), fishes (2 species), nemerteans (2 species), echinoderms (2 species), and cnidarian (1 species). The diversity of dominant species in Hangzhou Bay was quite low in wide variation. The dominant species in the offshore area were comprised of highly diversified macrozoobenthic taxa, including polychaetes, mollusks, crustaceans, fishes, nemerteans, and echinoderms. The dominant species in Xiangshan area were stable, with polychaetes in high dominance level. In Zhoushan area, the polychaetes became more and more popular during 2012—2016. Compared with historical reports, the dominant polychaetes increased significantly in recent years. Considering the whole area investigated, the dominant macrozoobenthos in the sea area off northern Zhejiang Province were characterized by the succession from mollusks to polychaetes. These results may be related to the serious anthropogenic and natural disturbances or change of macrozoobenthic food web in the sea area off northern Zhejiang Province, and the ecological environment is deteriorating. |
| Key words: northern Zhejiang Province macrozoobenthos dominant species temporal and spatial variation |
