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Composition of aquatic invertebrates associated with macrophytes in Lake Tonle Sap, Cambodia

机译：柬埔寨洞里萨湖与大型植物相关的水生无脊椎动物的组成

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摘要

Faunal composition of aquatic invertebrate communities associated with submerged parts of several species of macrophytes were studied in different areas in littoral Lake Tonle Sap in Cambodia, with special reference to those in root systems (interrhizon) of a free-floating water hyacinth (Eichhornia crassipes). Nine phyla of invertebrates were collected, of which oligochaetes, shrimps and Limnoperna mussels were abundant along with meiobenthic crustaceans. The macrophyte-associated invertebrates in Lake Tonle Sap might be unique in having abundant sessile animals, such as sponges, bryozoans and Limnoperna mussels. The Limnoperna mussels attached to macrophytes were more abundant in offshore and inundated forest than in secluded vegetational stands toward the shoreline. It suggests that water movement can be an important factor determining the distribution and abundance of the sessile animals by controlling larval dispersions and might be associated with the hydrological characteristic of the lake, i.e., the lake opens to the large Mekong River with drastic seasonal changes in water level.
机译：在柬埔寨沿海的洞里萨湖的不同地区，研究了与几种大型植物的淹没部分相关的水生无脊椎动物群落的动物组成，特别提到了自由漂浮的水葫芦（凤眼莲）的根系（interrhizon）中的动物组成。 。收集了9个无脊椎动物的门，其中低聚甲壳纲，虾和Limnoperna贻贝以及中底甲壳类动物都很丰富。洞里萨湖中与大型植物相关的无脊椎动物在拥有丰富的无柄动物（例如海绵，苔藓动物和Limnoperna贻贝）方面可能是独特的。附着在大型植物上的淡水贻贝在离岸和淹没的森林中比在朝向海岸线的僻静植被中的丰富。这表明水的流动可能是通过控制幼虫的扩散来决定无柄动物的分布和丰富度的重要因素，并且可能与湖泊的水文特征有关，即，该湖泊通向湄公河，其季节性急剧变化。水位。

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