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底栖动物群落是红树林生态系统多样性研究的重要内容之一。为了解大型底栖动物群落对高有机质含量和富营养的红树林生境的响应,从2006年4月到2007年1月,对福建省同安湾红树林生境和非红树林生境大型底栖动物群落及其时空变化进行了研究。我们在同安湾红树林种植区设置了凤林(FL)和山后亭(XA)两条断面,每条断面在红树林内各设2个取样站(FL1,FL2,XA-A和XA-B),林外各设1个取样站(FL3和XA-C)。底质研究结果显示凤林3个取样站(FL1,FL2和FL3)的有机质含量均超过底质污染评价标准的临界值3.4%,且无论凤林还是山后亭,红树林生境的有机质含量均要高过非红树林生境。共获得大型底栖动物91种,其中在红树林生境内获得77种,高于非红树林生境内获得的67种。红树林生境和非红树林生境的大型底栖动物平均栖息密度分别为4,445.8inds/m2和1,707.2inds/m2,平均生物量分别为51.1g/m2和94.6g/m2。独立样本t-检验结果显示,红树林生境和非红树林生境大型底栖动物平均栖息密度和平均生物量均存在显著差异。研究结果指示红树林生境对于寡毛类生存(如在高耐有机污染中能大量繁殖的沼蚓)有积极作用。但由于邻近的非红树林林生境的水淹时间更长,一些具有移动能力的软体动物和甲壳动物能迁移到更适合生存的非红树林生境中去。其他底质因子如盐度和土壤中值粒径等也会影响大型底栖动物群落变化。
The zoobenthos community is one of the important contents of mangrove ecosystem diversity research. In order to understand the response of the macrobenthos community to mangrove habitats with high organic matter content and eutrophication, from April 2006 to January 2007, the macrobenthic community of mangrove habitats and non-mangrove habitats in Tong’an Bay of Fujian Province And its temporal and spatial changes were studied. We set up two sections of Fenglin (FL) and Shanhou Pavilion (XA) in the mangrove planting area of Tong’an Bay. Each section has two sampling stations (FL1, FL2, XA-A and XA- B), one sampling station (FL3 and XA-C) each outside the forest. The results of sediment research showed that the organic matter content of the three sampling stations (FL1, FL2 and FL3) in Fenglin exceeded the critical value of sediment pollution assessment standard by 3.4%, and the organic matter content of mangrove habitat Higher than non-mangrove habitat. A total of 91 macrozoobenthos were obtained, of which 77 species were found in mangrove habitats, which was higher than the 67 species obtained in non-mangrove habitats. The average macrobenthos habitats of mangrove habitats and non-mangrove habitats were 4,445.8inds / m2 and 1,707.2inds / m2, respectively. The average biomass was 51.1g / m2 and 94.6g / m2 respectively. The independent sample t-test showed that there were significant differences in the average macro-habitat density and average biomass of macro-zoobenthos in mangrove and non-mangrove habitats. The findings indicate that mangrove habitat has a positive effect on the survival of oligochaetes, such as marsh worms that can be highly multiplied in highly organic-resistant organisms. However, due to flooding of neighboring non-mangrove forest habitats, some migrating molluscs and crustaceans can migrate to more suitable non-mangrove habitats. Other sediment factors such as salinity and median soil size also affect macrobenthic community changes.