Benthic communities and biodiversity in Thai mangrove swamps

泰国红树林沼泽的底栖群落和生物多样性

• 批准号: 08041133
• 负责人: NISHIHIRA Moritaka
• 金额: $ 2.37万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08041133/
• 关键词: mangrove swamp; benthos; biodiversity; haitat; mud flat; Thailand

1. To elucidate the community structure and biodiversity of benthic animals in mangrove swamps, field studies were conducted at Klong Kone mangrove swamps in Samut Songkhram Province, Thailand from 1994 to 1996. We set 2 transect lines extending from mud flat to landward fringe of the mangrove forest. Organic matter in the sediments inside the forest were higher than those in the mud flat, but the nutrient concentrations in the interstitial water showed the opposite trend.2. We studied the benthic fauna by quantitative and qualitative samplings. In the outer mud flat and the transplanted area, the density increased during 2 years and Hypsicomus sp. (polychaete) and Apseudes sp. (tanaid crustacean) were dominant. In the mangrove forest, gastropods, polychaetes, ocypodid, sesarmid crabs and erobid snails were prominent, and the density and species richness were rather stable for 3 years. There was a general tendency for the number of individuals decrease from the mud flat to the inner part of the forest. However, diversity index showed the opposite trend.3. In the transplantation area, the saplings planted in 1994 grew to a height of about 5 m. Whit the growth of mangroves, the organic matter in the sediments increased. The number of species also increased from 1994 to 1996.4. For the studies of colonization processes of the barnacles, we set and monitored the plastic test poles at several different environments. The zonal distributions of Balanus sp. (occupying lower level) and Chthamalus sp. (upper) were observed, and population densities were higher at the mud flat than inside the forest.5. Comparison of the benthic communities between intact and deforested forests revealed that the existence of developed forests are important for the biodiversity conservation of benthic community. A research report of our project for 3 years is published.

1.为了阐明红树林沼泽底栖动物的群落结构和生物多样性，1994 - 1996年在泰国Samut Songkhram省Klong Kone红树林沼泽进行了野外调查。我们设置了2条样线，从泥滩一直延伸到红树林的向陆边缘。森林内部沉积物中有机质含量高于泥滩，而间隙水中营养盐含量则相反.通过定量和定性取样对底栖动物进行了研究。在外滩涂和移植区，密度增加，在2年内，Hypsicomus sp.（多毛类）和Approxides sp.（tanaid甲壳动物）的优势。在红树林中，腹足类、多毛类、海足类、蟹类和侵蚀性螺类的数量和物种丰富度在3年内相对稳定。个体数量总体上呈现出从滩涂向林内递减的趋势。而多样性指数则表现出相反的趋势.在移植区，1994年种植的树苗已长到约5米高。随着红树林的生长，沉积物中有机质含量增加。1994年至1996年，物种数量也有所增加。为了研究藤壶的定殖过程，我们在几种不同的环境中设置和监测塑料测试杆。藤壶属（Balanus sp.）（位于下层）和壶腹藤壶属（Chthalus sp.）（位于上层）的分布呈带状，其种群密度在泥滩上高于林内.通过对原始森林和森林砍伐后底栖生物群落的比较，揭示了森林的发育对底栖生物群落生物多样性保护的重要性。发表了我们项目3年的研究报告。

项目成果

M.Nishihira(ed.): Benthic communities and biodiversity in Thai mangrove swamps. Biological Institute, Tohoku University, 1-170 (1997)

M.Nishihira（编辑）：泰国红树林沼泽的底栖群落和生物多样性。

M.Nishihira(ed.): "Benthic communities and biodiversity in Thai mangrove swamps" Biological Institute,Tohoku University, 170 (1997)

M.Nishihira（编辑）：“泰国红树林沼泽的底栖群落和生物多样性”，东北大学生物研究所，170（1997）

M.Nihsihira (ed.): "Benthic communities and biodiversity in Thai mangrove swamps" Biological Institute,Tohoku University, 170 (1997)

M.Nihsihira（编辑）：“泰国红树林沼泽的底栖群落和生物多样性”，东北大学生物研究所，170（1997）