摘要
Habitat pattern change of red-crowned cranes (Grus japonensis) in t he Liaohe Delta between 1988 and 1998 was analyzed with the help of Spatial Dive rsity Index based on remote sensing data and field investigation. The result sho wed that the influence from human activities on the wetland habitat of red-crow ned cranes was prominent with the development of oil and agricultural exploitati on, and the habitat pattern of red-crowned cranes had been obviously changed by the human disturbance during the ten years. The areas with high Spatial Diversi ty values (SD≥0.65) and that with mid-high values (0.5≤SD< 0.65), which const ituted the main part of suitable habitat of red-crowned cranes,had reduced to 9142ha and 5576ha respectively, with the shrinking of natural land cover, such a s reed and Suaeda community. The habitat pattern became more fragmented, which w as caused by roads and wells during oil exploration. It was indicated that the s uitability and quality of habitat for red-crowned cranes in the Liaohe Delta we re degraded in the last decade. The results also showed that diversity index cou ld reflect the habitat suitability of red-crowned cranes quantitatively and des cribe the spatial pattern of the habitat explicitly. This study will provide a s cientific basis for habitat protection of red-crowned cranes and other rare spe cies in wetlands.
Habitat pattern change of red-crowned cranes ( Grus japonensis) in the LiaoheDelta between 1988 and 1998 was analyzed with the help of Spatial Diversity Index based on remotesensing data and field investigation. The result showed that the influence from human activities onthe wetland habitat of red-crowned cranes was prominent with the development of oil and agriculturalexploitation, and the habitat pattern of red-crowned cranes had been obviously changed by the humandisturbance during the ten years. The areas with high Spatial Diversity values ( SD≥0. 65) andthat with mid-high values (0. 5 =≤ SD < 0. 65), which constituted the main part of suitable habitatof red-crowned cranes, had reduced to 9142ha and 5576ha respectively, with the shrinking of naturalland cover, such as reed and Suae-da community. The habitat pattern became more fragmented, whichwas caused by roads and wells during oil exploration. It was indicated that the suitability andquality of habitat for red-crowned cranes in the Liaohe Delta were degraded in the last decade. Theresults also showed that diversity index could reflect the habitat suitability of red-crowned cranesquantitatively and describe the spatial pattern of the habitat explicitly. This study will providea scientific basis for habitat protection of red-crowned cranes and other rare species in wetlands.
基金
UndertheauspicesoftheNationalNaturalScienceFoundationofChina(No.40001002andNo.40171037).
