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滴水湖作为人工新建湖泊,其生态系统形成过程中的跟踪数据对重建其他湖泊生态系统具有重要的参考意义。2013年7月和2014年8月对滴水湖现生介形类分布状况及水环境因子分别进行了调查,结果发现,滴水湖湖水盐度范围介于1.4‰—2.0‰之间,属于微咸水湖。12个采样点共鉴定出现生介形类13种,包括非海相类克氏丽星介Cypria kraepelini(G.W.Müller)和无偶斗星介Cypridopsis vidua(O.F.Müller),海相类中华洁面介Albileberis sinensis Hou、向岛薄丽星介Dolerocypria mukaishimensis Okubo、腹结细花介Leptocythere ventriclivosa Chen、东台新单角介Neomonoceratina dongtaiensis Yang et Chen、长新中华花介Neosinocythere elongata(Hu)、闪光似异口介Paradoxostoma nitida Ho、典型中华美花介Sinocytheridea impressa(Brady)、长中华海花介Sinopontocythere elongata(Gou)、古屋刺花介Spinileberis furuyaensis Ishizaki et Kato、美丽刺面介Spinileberis pulchra Chen和丰满陈氏介Tanella opima Chen。应用典范对应分析(CCA)方法对滴水湖12个样点的8种介形类和9个环境因子进行了相关性研究,结果显示:介形类和环境因子间具有明显的相关性;9个环境因子中叶绿素、总磷和电导率对介形类的分布影响最大,总氮和湖水水温对介形类也有一定影响;从物种分布状况看,相对于低分布频度物种,高分布频度(Y>0.01)物种对环境的耐受性更大,其中Cypria kraepelini和Neomonoceratina dongtaiensis对环境因子的敏感性明显高于其它物种。结合历史资料分析发现,不仅自然环境因子(如电导率、水温等),而且人为干扰因素(如总磷、总氮)都对介形类分布的改变起到重要影响。
As a new artificial lake, drip lake has important reference value for reconstructing other lake ecosystems. In July 2013 and August 2014, the existing distribution status of overcast waters in Di Shui Lake and water environment factors were investigated respectively. The results showed that the salinity of Di Shui Lake was between 1.4 ‰ -2.0 ‰, belonging to brackish water lake . Thirteen species were identified from 12 sampling sites, including Cypria kraepelini (GWMüller) and Cypridopsis vidua (OFMüller), non-marine species Klebsiella spp., Albileberis sinensis Hou, Dolerocypria mukaishimensis Okubo, Leptocythere ventriclivosa Chen, Neomonoceratina dongtaiensis Yang et Chen, Neosinocytherea elongata (Hu), Paradoxostoma nitida Ho , Sinocytheridea impressa (Brady), Sinopontocysthere elongata (Gou), Spinileberis furuyaensis Ishizaki et Kato, Spinileberis pulchra Chen and Tanella opima Chen. The Canonical Correspondence Analysis (CCA) method was used to study the correlation between 8 types of environmental factors and 8 types of environmental factors in 12 sampling sites in Drip Lake. The results showed that: Among the environmental factors, chlorophyll, total phosphorus and conductivity had the greatest influence on the distribution of the ostracods, while total nitrogen and lake water temperature had some influence on the ostracods. From the distribution of species, relative to the low-frequency species, the high frequency of distribution (Y> 0.01), the species was more tolerant to the environment. Among them, Cypria kraepelini and Neomonoceratina dongtaiensis were significantly more sensitive to environmental factors than other species. Combined with historical data analysis, it is found that not only natural environmental factors (such as electrical conductivity, water temperature, etc.), but also human interference factors (such as total phosphorus and total nitrogen) have an important impact on the distribution of ostracods.