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基于RS與GIS的近代黃河三角洲丹頂鶴生境分析
摘要： 以近代黃河三角洲3期TM遙感影像(1986年,1996年,2001年)及研究區(qū)1980年的地形圖為基礎(chǔ)數(shù)據(jù),應(yīng)用RS與GIS技術(shù),結(jié)合野外調(diào)查,采用空間多樣性指數(shù)(S_d)對(duì)1986-2001年近代黃河三角洲丹頂鶴生境適宜性的時(shí)空變化進(jìn)行了分析.依據(jù)S_d值的高低與丹頂鶴生境的相關(guān)性我們將S_d分為4類:低值區(qū)(0,0.25]、中低值區(qū)(0.25,0.50]、中高值區(qū)(0.50,0.65]、高值區(qū)(0.65,1.00],值越高,生境質(zhì)量愈高,適宜程度亦愈高.結(jié)果表明:從1986-2001年近代黃河三角洲丹頂鶴生境的破碎化程度加深,生境連通性降低,適宜性下降.不適宜生境(S_d≤0.5)的區(qū)域面積比重呈現(xiàn)出增加的趨勢(shì):從1986年的65.11%增加到1996年的70.79%,又增加到2001年的77.06%;S_d>0.5的區(qū)域面積比重呈現(xiàn)出明顯的下降趨勢(shì):1986年,1996年和2001年的面積比重分別為34.9%,28.2%,22.93%. Abstract： Based on TM imagery, topographic maps and field investigation, the habitat pattern of redcrowned cranes in the Modern Yellow River Delta was analyzed with RS and GIS. Spatial diversity index (S_d) was applied to describe the temporal and spatial variation between 1986 and 2001 in the process. According to the relativity between the Red-crowned Crane habitat and spatial diversity index, we divided S_d into four categories as follows: low value(0,0.25], mid-low value (0. 25,0. 50], mid-high value (0.50,0.65] and high value (0.65,1.00]. A higher value indicates better habitat quality and suitability. The results showed that the fragmentation of the Red-crowned Crane habitat increased while the connectivity and suitability of the habitat decreased with time between 1986 and 2001 in the Yellow River Delta. The area of unsuitable habitat (S_d≤0. 5) gradually enlarged, which accounted for 65.11%, 70.79% and 77.06% in 1986, 1996 and 2001 respectively. The area with high or mid-high S_d values (S_d>0. 5), which occupied 34.9%(1986), 28.2%(1996) and 22.93%(2001), showed an obvious decreasing trend. 作 者： 李祥 郭篤發(fā) 張寶雷 蔣紅花 LI Xiang GUO Du-fa ZHANG Bao-lei JIANG Hong-hua 作者單位： 李祥,郭篤發(fā),張寶雷,LI Xiang,GUO Du-fa,ZHANG Bao-lei(山東師范大學(xué),人口·資源與環(huán)境學(xué)院,濟(jì)南,250014)蔣紅花,JIANG Hong-hua(山東師范大學(xué),科研處,濟(jì)南,250014)
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