| 摘要: |
| 本研究于2021年2月在金门岛红树林湿地设置2个断面4个采样站位进行沉积物样品采集，对小型底栖动物的类群组成，海洋线虫群落的优势属、优势种和摄食类型等方面进行研究。结果表明：共鉴定出10个小型底栖动物类群，包括海洋线虫、桡足类、寡毛类、多毛类、涡虫、有孔虫、腹足类、涟虫、双壳类和缓步类；其中海洋线虫为最优势类群，占小型底栖动物总数的93.93%。共鉴定出海洋线虫51种或分类实体，隶属于4目15科31属。建功屿断面JH站位鉴定出11属16种，其优势属（数量百分比≥5%）为Ptycholaimellus、Viscosia、Daptonema、Dorylaimopsis、Parasphaerolaimus、Anoplostoma，优势种为Ptycholaimellus sp.1、Viscosia sp.1、Daptonema ungula、Dorylaimopsis sp.1、Anoplostoma papaviviparum； JM站位鉴定出23属35种，其优势属为Metachromadora、Daptonema、Viscosia、Ptycholaimellus、Dorylaimopsis，优势种为Metachromadora sp.1、Viscosia sp.1、Dorylaimopsis sp.1、Daptonema baihaijiaoensis、Ptycholaimellus ocellatus； JL站位鉴定出18属30种，其优势属为Daptonema、Dorylaimopsis，优势种为Daptonema quattuor、Daptonema setihyalocella、Viscosia sp.1、Daptonema baihaijiaoensis、Ptycholaimellussp.1、Spilophorella candida。古宁头断面GH站位鉴定出21属35种，其优势属为Daptonema、Parasphaerolaimus、Ptycholaimellus、Viscosia、Ptycholaimellus，优势种为Daptonema aquattuor、Daptonema setihyalocella、Viscosia sp.1、Daptonema baihaijiaoensis、Ptycholaimellus sp.1、Spilophorella candida。从群落结构来言，4个采样站位仅Daptonema为共有优势属，其他无共有优势种。从摄食类型来看，除建功屿断面中潮位的海洋线虫群落以2A型为主以外，在其他3个采样站位均以1B型为优势，故本研究海洋线虫以非选择性沉积食性者为主。 |
| 关键词: 海洋生物学 自由生活海洋线虫 群落结构 红树林湿地 金门岛 |
| DOI：10.3969/J.ISSN.2095-4972.20220102001 |
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| 基金项目:国家自然科学基金(31772416)；福建省自然科学基金(2022J01324) |
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| Community structures of marine nematodes in Jinmen mangrove wetland |
| XIAO Yueping,GUO Yuqing,SHIH Yijia |
| (Fisheries College, Jimei University, Xiamen 361021, China) |
| Abstract: |
| In February 2021, two sections and four sampling sites were set up to collect sediment samples for the study of meiofauna composition, dominant genus (species) and feeding types of marine nematode in the mangrove wetland of Jinmen Island, Taiwan Province. Results showed that 10 meiofaunal assemblages were identified, including nematode, copepoda, oligochaeta, polychaeta, turbellaria, foraminifera, gastropod, cumacea, bivalve and tardigrada. Nematoda was the most dominant group, accounting for 93.93% of the total species. A total of 51 species or taxonomic entities of nematodes were identified, belonging to 31 genera, 15 families in 4 orders. On the section at site JH of Jiangongyu Island, 11 genera and 16 species were identified, and the dominant genera (percentage ≥5%) werePtycholaimellus, Viscosia, Daptonema, Dorylaimopsis, Parasphaerolaimus, Anoplostoma. And the dominant species were Ptycholaimellus sp.1, Viscosia sp.1, Daptonema ungula, Dorylaimopsis sp.1, Anoplostoma papaviviparum. Then, at site JM, 23 genera and 25 species were identified, and the dominant genera (percentage ≥5%) were Metachromadora, Daptonema, Viscosia, Ptycholaimellus, Dorylaimopsis. Among them, the dominant species were Metachromadora sp.1, Viscosia sp.1, Dorylaimopsis sp.1, Daptonema baihaijiaoensis and Ptycholaimellus ocellatus. Finally, at site JL, 18 genera and 30 species were identified, and the dominant genera (percentage≥5%) were Daptonema and Dorylaimopsis. With dominant species Daptonema quattuor, Daptonema setihyalocella, Viscosia sp.1, Daptonema baihaijiaoensis, Ptycholaimellus sp.1 and Spilophorella candida. Besides, on the section at site GH of Guningtou Island, 21 genera and 35 species were identified, and the dominant genera (percentage ≥5%) were Daptonema, Parasphaerolaimus, Ptycholaimellus, Viscosia and Ptycholaimellus, among then, the dominant species were Daptonema aquattuor, Daptonema setihyalocella, Viscosia sp.1, Daptonema baihaijiaoensis, Ptycholaimellus sp.1 and Spilophorella candida. From the perspective of community structure, only Daptonemawas found as common dominant genus at all 4 sampling sites with none of other common dominant species. In view of feeding type, the nematode community appeared at site in the middle tidal zone of Jiangongyu Island was only dominated by type 2A in contrast to the type 1B appearing only at the other three sampling sites. Therefore, most marine nematodes in this study are mainly feeders of non-selective sediments. |
| Key words: marine biology free-living marine nematodes community structure mangrove wetland Jinmen Island |
