However, it exists the complex characteristics of wetland habitats due to the wetland locating between land and water bodies, and it is well known that inaccessibility to wetlands often causes a large difficulty to do wetland research. 但是,湿地复杂的水陆交界生境特征及难以进入等客观条件限制给湿地研究造成了很大的困难。
During 1986-1996, the landscape change of buffer zone in Yancheng Nature Reserve relied mainly on the natural succession, and the natural wetlands reclamation of a large area became the main influence factor of landscape change during 1996-2006. 缓冲区在1986~1996年期间景观变化主要以滨海湿地的自然演替为主,而在1996~2006年期间,对自然湿地的大面积围垦成为了这一时期景观变化的主要影响因素。
Chinese coastal wetlands are very widespread, in large quantities, rich in resources. 我国滨海湿地分布极广、数量较大、资源丰富。
Shorebirds concentrate on large estuaries, bays, coastal area and inland wetlands. At these stopover sites, a large number of shorebirds species with similar requirements come together forming dense multi-specific aggregations in relatively uniform limited habitats. 鸻鹬类迁徙过程中聚集在大型河口、海岸、海湾和内陆湿地等中途停歇地,许多形态相似、具有相同或相似需求的物种在相对有限的栖息地聚集形成密集的多物种群落。
Since the wide distributions of forests, grasslands, rivers and wetlands, northwest possesses a complex ecological environment and a variety of ecotypes. Hence it provides a large number of ecological services and related ecological products for different regions in our country. 西北地区生态环境复杂,生态类型多种多样,森林、草地、河流、湿地遍布其中,为我国各地区提供了大量的生态服务和相关生态产品。