海南島自然保護區(qū)對土壤保持服務(wù)功能的保護效果
[Abstract]:The construction of nature reserves is an important means to protect ecosystem services, which plays an irreplaceable role in preventing soil erosion and maintaining ecological security. Based on the remote sensing images of 1988, 1998 and 2008, this paper analyzes the long-term protective effect of Hainan protected area on soil conservation function, and discusses the influencing factors of the change of soil conservation function in Hainan Province. The results showed that: (1) the average soil conservation amount per unit area of Hainan Island was 1951.59 t / hm-2a-1, which was 2. 4 / 3. 2 / 2. 9 times of the average level of 0 ~ 5 ~ 10 ~ 10km outside the area and 2. 4 / 2 ~ 2 / 2 of the average level of Hainan Island, respectively. Protected areas play an important role in the conservation of soil conservation functions; (2) in time scale, the soil conservation function in and out of the reserve showed a different degree of degradation trend from 1988 to 2008, in which the degree of degradation in the periphery of the protected area was significantly higher than that in the protected area (P0.05). The degree of degeneration in the latter 10 years was significantly higher than that in the previous 10 years (P0.05). (3) from the point of view of driving factors, the economic development, population increase and cultivated land expansion in 1988-2008 are the main factors affecting the degradation of soil conservation function in protected areas. In the first 10 years, soil conservation function and gross domestic product per unit area are the main factors affecting the degradation of soil conservation function. The gross domestic product (GDP), population density and cultivated land ratio per unit area of primary industry were negatively correlated (P0.05), while in the last 10 years, soil conservation function and GDP per unit area were significantly negative (P0.05). There was significant negative correlation between population density and the proportion of cultivated land (P0.05). Therefore, the relationship between soil conservation and human activities should be balanced to realize the harmonious development of ecological environment protection and social economy.
【作者單位】: 中國科學(xué)院生態(tài)環(huán)境研究中心城市與區(qū)域生態(tài)國家重點實驗室;海南省環(huán)境科學(xué)研究院;
【基金】:全國生態(tài)環(huán)境十年變化(2000—2010年)遙感調(diào)查與評估項目(STSN-04-00)
【分類號】:S157
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