[Nest habitat quality evaluation for the oriental great reed warbler (Acrocephalus orientalis) in Baiyangdian Wetland].

The Baiyangdian Wetland Natural Reserve is an important breeding habitat for oriental great reed warbler (OGRWs), Acrocephalus orientalis, in North China Plain. We investigated the nesting sites of OGRWs by line transect method during June-July, 2011, and 112 nests were found out in total. The ecological-niche factor analysis (ENFA) was applied in nesting habitat suitability assessment for OGRWs in Baiyangdian.

[Environmental characteristics of the atrazine in the waters in East Liaohe River Basin].

Based on the field investigation and the Laboratory experiment, and taking the Geographic Information System (GIS) techniques as the key data disposal platform, the spatial and temporal differences and the enrichment characteristics of atrazine in the surface water in East Liaohe River Basin were systematically analyzed, the effect factors on that also were interpreted. The results show that, the average atrazine content in waters in regions with glebe or without glebe were namely 9.71 microg x L(-1) and 8.

[Spatial and temporal variation of the natural reproducible ability of water resource in the northeast part of China and its response to the land use change].

With respect to the water cycling, the natural reproducible ability of water resource (NRAWR) was expressed, and the spatial and temporal differences of NRAWR in the northeast part of China were anatomized systematically with the GIS techniques. Furthermore, the response of NRAWR in the northeast part of China to land use changes was described based on land use patterns of the northeast part of China in 1986,1996 and 2000. Water resource in the northeast part of China has the distinct spatial and temporal variation during the period from 1956 to 2001 with the multi-year volume of 199.