关键词: 共沉淀, 吸附, 有机铁氧化物复合体, X射线吸收光谱, 表面络合

Abstract: Nine sampling sites with an area of 1 km² each were selected to study bird diversity and its relation with habitat structure by using line transect and point count surveys method and remote image-based habitat structure analysis for four seasons from 2015 to 2016. It was found that there were a total of 127 species of birds in Dashanbao Nature Reserve, which belong to 41 families and 16 orders, including 14 of key state protected species. Of the 127 species, the 3 main orders, Passeriformes,  Anseriformes, and Charadriiformes, take up a total of 27 families and 80 species. The number of 3 species,Anser indicus, Alauda gulgula andGrus nigricollis was the greatest, accounting for 50.09% of the total. The resident birds and songbirds were dominant species, accounting for 49.61% and 51.97% of the total species, respectively. In terms of number, winter resident birds and water birds were dominant, accounting for 58.13% and 60.28% of the total, respectively. Moreover, birds preferring waters and wetlands accounted for 40.94% of the total species and 60.28% of the total number, respectively. Pearson’s correlation coefficient showed a significant relationship (P<0.05) between the percentage of water area and number of birds in winter and spring, and between the percentage of forest shrub area and species of birds in summer and autumn. Dashanbao Nature Reserve is an important bird habitat and wintering site, and its habitat structure has a great effect on bird species and number. Constructing a habitat mosaic of waters, forests, shrubs, and wetlands is an important way to protect bird diversity of the reserve.

Key words: organo-Fe oxides, coprecipitation, X-ray absorption spectroscopy., adsorption, surface complexation