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大连金沙滩小型底栖生物时空分布特征及影响因素
臧瑜, 孙燕, 杨丽莉, 李亚男, 骆添, 慕芳红
中国海洋大学
摘要:
于2015年和2016年对大连金沙滩砂质潮间带进行了季节性的调查,对小型底栖生物及其所处的沉积环境进行了研究,探讨了小型底栖的丰度、生物量和群落的时空变化及其与环境变量的关系。结果表明,金沙滩砂质潮间带沉积物主要成分为极粗砂和粗砂,年平均Chl-ɑ含量为0.99±1.44 μg/g,年平均有机碳含量为0.38±0.56 %;共鉴定小型底栖生物类群15个,优势类群为海洋线虫类与桡足类(二者占总丰度72.82 %);小型底栖生物年平均丰度为425.18±429.10 ind?10cm-2,呈现明显的季节变化和潮区差异,季节变化趋势为3月 > 10月 > 7月 > 12月,潮区变化趋势为高潮带 > 中潮带 > 低潮带;年平均生物量为870.04±853.18 μg?dwt?10cm-2,季节变化趋势为10月 > 7月 > 3月>12月,潮区间也存在显著差异。小型底栖生物的类群组成在季节间具有极显著差异。BIOENV分析表明,间隙水盐度、极粗砂含量和有机碳含量的组合能最好地解释金沙滩小型底栖生物群落的时空分布。研究结果可为砂质滩小型底栖生物的研究提供基础数据,也可为全球气候变化背景下砂质潮间带的保护、开发和利用提供科学依据。
关键词:  砂质潮间带,小型底栖生物,时空分布,大连金沙滩
DOI:10.11759/hykx20190115002
分类号:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Spatio-temporal distribution pattern of meiofauna in the sandy beach of Jinshatan, Dalian and its influencing factors
Zang Yu, Sun Yan, Yang Lili, Li Yanan, Luo Tian, Mu Fanghong
Ocean University of China
Abstract:
A seasonal survey was carried out on intertidal meiofauna and its sedimentary environment in the sandy beach of Jinshatan, Dalian in 2015 and 2016. The spatio-temporal distribution of meiofaunal abundance, biomass and the community structure were studied and the influencing environmental factors were analyzed. The results showed that the main components of the sediment were VCS (very coarse sand) and CS (coarse sand). The annual average content of Chl-ɑ was 0.99±1.44 μg/g. The annual average organic matter content was 0.38±0.56 %. A total of 15 meiofauna groups were identified. The most dominant groups were nematode and copepoda, accounting for 72.82 % of the total abundance. The average meiofauna abundance and biomass were 425.18±429.10 ind?10cm-2 and 870.04±853.18 μg?dwt?10cm-2, respectively. The meiofaunal abundance differed seasonally, ranked as spring > autumn > summer > winter. The meiofaunal abundance also varied horizontally, ranked as high tide zone > middle tide zone > low tide zone. The meiofaunal biomass varied seasonally, ranked as autumn > summer > spring > winter, the difference among tidal zones was also significant. There was significant seasonal difference of meiofauna community. The combination of interstitial water salinity, coarse sand content and organic matter content could best explain the temporal and spatial distribution of meiofauna community structure according to the BIOENV analysis. The results can provide basic data for further research on interstitial meiofauna and also provide scientific basis for the protection, exploitation and utilization of sandy intertidal zones under the background of global climate change.
Key words:  the intertidal sandflat  meiofauna  spatio-temporal distribution  Jinshatan,Dalian
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