Adsorption of sediments on NH~+_4-N is one of the key biogeochemical processes, which plays an important role in the cycle of nitrogen in an estuary and tidal flats.

In the Changjiang Delta, main ecosystems are composed of river ecosystem, estuary and coastal wetland, farmland and plantation ecosystem, urban ecosystem, lake ecosystem and coastal sea ecosystem.

长江三角洲主要生态系统类型包括河流生态系统、河口海岸湿地生态系统、农林生态系统、城市生态系统、湖泊生态系统以及近海海域生态系统。

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A set of indexes for the EHA is developed, which focused on ecosystem structure and serives at the estuaries and bays.

以生态系统结构&服务功能为主要评价内容，构建了一套河口、海湾生态系统健康评价指标体系。

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The result shows that, the health value of Liaohe estuarine wetland ecosystem is 0.9791 in 1996 and 0.9618 in 2000, in other words, it from heath turned to sub-heath, and the main influence factors are water resource shortage and the increasing oil pollution.

结果表明，1996年辽河口湿地生态系统健康度为0.97912000年则降至0.9618，即由健康状态转为亚健康状态，其主要原因为水资源不足和石油类污染加剧。

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The catastrophic progression method is introduced into the ecosystem health assessment of the wetland ecosystem in the study. The method uses catastrophe fuzzy subordinate function which is generated by catastrophe theory combining with fuzzy mathematics and normalizing formula to calculate the scores of ecosystem health.

把突变级数法引入到河口湿地生态系统健康评价中，利用突变理论同模糊数学相结合产生的突变模糊隶属函数，由归一公式求得总隶属函数表征健康度。

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The effects of natural disturbance such as sea level rise, typhoon and storm tide, and human_caused disturbance such as reclamation, coastal engineering, environmental pollution and natural conservation area construction, on the structure and function of estuary wetland ecosystem were analyzed.

重点分析了海平面上升、台风暴潮等自然干扰，围垦、大型海岸工程（填海、码头建设等）、环境污染和保护区建设等人为干扰对河口湿地生态系统结构和功能的影响。

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This paper applied the ecosystem health theory to estuarine complex ecosystem characterized by its complexity and uncertainty, and provided an objective and scientific tool for health assessment in estuaries through the combination of AHP and fuzzy mathematics theory.

本文将生态系统健康理论引入河口复合生态系统，针对河口的复杂性和不确定性，将层次分析法与模糊数学理论相结合，为河口生态系统健康提供了客观、科学的评价方法。

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At present, the main ecological problem of Liaohe estuarine is decreasing in wetland, environmental pollution, decreasing in the amount of sand brought from the river to the sea, decreasing in biodiversity.

目前辽河口湿地生态系统存在的主要生态问题是天然湿地丧失、环境污染、河流携带入海的水沙量减少、生物多样性急剧下降。

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Estuarine wetland ecosystem is located at intersection point between rivers and marine ecosystems. Because of current mixing of Runoff and tidal current, the estuarine has unique environment characteristic and the biological composition.

河口湿地生态系统位于河流与海洋生态系统的交汇处，径流与潮流的掺混造成河口地区独特的环境特征和生物组成。

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The benthos resource function in ecosystem of the Yangtze River Estuary was primarily discussed and we estimated and calculated their products ( natural resources) value for the first time.

本文还对底栖动物在长江河口湿地生态系统中的资源功能做出了初步探讨，并首次估算出其物质产品（自然资源）价值。

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The Nature Reserve for Chinese Sturgeon is an interdependent system, so the legislation object should be identified as Chinese sturgeon and its estuarine ecological economic system.

中华鲟自然保护区是一个相互依赖的系统，立法对象应明确是中华鲟及其赖以生存的河口生态经济系统。

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The biotic components and their ecological process in estuarine wetland ecosystem had become one of research focus which was paid close attention to day by day.

河口湿地生态系统的生物组分及其生态过程已成为人们日益关注的研究热点之一。

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Based on the study above, the factors on press and ecological response element was identified, ecosystem health assessment model was set up.

在此基础上，识别压力、生态响应要素建立辽河口湿地生态系统健康评价模型，并对辽河口湿地健康状况进行诊断和评估。

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The catastrophic progression method is used to analyze and assess the health states of Liaohe estuarine wetland ecosystem in 1996 and 2000.

对1996年和2000年辽河口湿地生态系统健康状况进行了评价和分析。

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Structure, Function and Services of Estuarine Wetland Ecosystem: A Case Study in Yangtze Estuary

河口湿地生态系统结构、功能与服务&以长江口为例

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Effects of Disturbance on Estuary Wetland Ecosystem

干扰对河口湿地生态系统的影响分析

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Natural disturbance and human_caused disturbance of estuary wetland ecosystem were identified.

对河口湿地生态系统所受到的自然干扰和人为干扰进行了系统辨识。

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The estuary ecosystem has important value, as it provides abundant products and services to human. At the same time, estuary is easily destroyed by human activities. Some problems such as pollution, siltation, eutrophication, resources exhaustion, et al become increasingly seriously.

河口生态系统为人类提供了丰富的服务功能，具有重要的经济价值；同时，河口环境也是最易受人类活动破坏的区域，污染、淤积、富营养化、资源枯竭等问题日益突出。

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( 3) The integrated index of Jiulong River Ecosystem health state 0.48 had 0.12 effort space to comparably healthy, but had 0.08 to drop to unhealthy.

九龙江河口生态系统健康状态综合指数0.48距离较健康水平尚须0.12的努力空间，而坠入不健康状态却仅差0.08。

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The results are as follows: 1. Marsh vegetation was one of the carbon and nitrogen repositories in the Yangtze estuary.

结果如下：1.长江口潮滩植被是河口生态系统中重要的碳、氮储存库之一。

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That is high for the productive forces, rich in biodiversity, obvious salinity gradient, jamming intense and so on.

河口生态系统具有复杂的环境因素及重要的生态服务功能，表现为生产力高、生物多样性丰富、盐度梯度效应明显、人为干扰强烈等。

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