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为揭示莱州湾砂壳纤毛虫群落季节变化规律,在莱州湾设置8个站位,于2011年5–11月及2012年3–4月进行了9个航次的调查,用浅海III型浮游生物网由底至表垂直拖网采集砂壳纤毛虫。结果表明,莱州湾3–11月砂壳纤毛虫物种丰富度的变化范围为5–19,周年变化呈现一峰两谷的趋势。丰度的范围为0–318 ind./L,丰度较大(>50ind./L)的种类有运动类铃虫(Codonellopsis mobilis)和清兰拟铃虫(Tintinnopsis chinglanensis)。各月平均丰度随时间的变化趋势为双峰型,最大值出现在7月(63 ind./L),次峰值出现在5月(48 ind./L),最小值出现在3月(2 ind./L)。黏着壳种类在3–11月均有出现,透明壳种类仅在温度较高(>15°C)的6–9月出现。各月的优势种数目为1种(5月)到8种(8月),其中运动类铃虫在所有月中都是优势种,对砂壳纤毛虫丰度周年的变化规律产生较大影响。使用各月所有种类的平均丰度对各月砂壳纤毛虫群落进行聚类分析,得到两个群落(相似度30%):群落I(7–9月)和群落II(3–6月、10–11月),说明砂壳纤毛虫群落发生了明显的季节变化。砂壳纤毛虫的物种丰富度、丰度与环境因子(温度、盐度)均没有明显的相关性。
In order to reveal the seasonal variation of the sand ciliate community in Laizhou Bay, eight stations were set up in Laizhou Bay. From September to November in 2011 and from March to April in 2012, nine voyages were surveyed. The shallow-sea type III plankton Net from the end to the table vertical trawl collecting sand shell ciliates. The results showed that the species richness of sand ciliates from March to November in Laizhou Bay ranged from 5 to 19, and the annual variation showed a trend of one peak and two valleys. The abundance ranged from 0 to 318 ind./L, and the more abundant (> 50 ind./L) species were Codonellopsis mobilis and Tintinnopsis chinglanensis. The trend of monthly mean abundance with time is bimodal, with the maximum at July (63 ind./L), the sub-peak at May (48 ind./L) and the minimum at March 2 ind./L). Adhesive shell species appear in March-November, and transparent shell species appear only in June-September at higher temperatures (> 15 ° C). The number of dominant species in each month ranged from 1 species (May) to 8 species (August). Among them, the species of sports-type Helicoverpa armigera was the dominant species in all the months and had a significant impact on the annual variation of abundance of the sand ciliate . Using the average abundance of all species in each month, cluster analysis of the sand-ciliate Ciliatum of each month gave two communities (30% similarity): Community I (July-September) and Community II (March-June, October-November), indicating that the sand-shell ciliates community had a significant seasonal change. Species richness and abundance of sand ciliate were not significantly correlated with environmental factors (temperature and salinity).