1990-2020年新疆生态系统服务权衡协同关系及驱动因素

    Trade-off synergies and drivers of ecosystem services in Xinjiang from 1990 to 2020

    • 摘要: 新疆是全球温带干旱区生态系统的最典型代表,开展新疆生态系统服务时空变化及权衡协同分析,有助于该区域的可持续发展。本文基于卫星遥感数据, 采用InVEST模型计算了新疆1990-2020年的土壤保持量(SR)、生境质量(HQ)、产水量(WY)、粮食产量(FP)和碳储量(CS),以自然资源区划的视角分析不同时期各个生态系统服务的时空分布特征。同时,采用R语言Spearman相关系数和GeoDa软件分析五种关键生态系统服务之间的权衡协同关系,并用最优地理探测器对其驱动因素进行分析。结果显示;(1)1990年-2020年新疆年均WY、CS、SR、HQ和FP分别为575.9×108m3,9.373×109m3,17.538×109t,0.47, 1119.64×104t。多项生态系统服务功能高值区主要分布在阿尔泰山、塔城盆地、伊犁盆地、准噶尔盆地和塔里木平原的草原地区。(2)CS-SR、HQ-SR、WY-HQ和WY-SR主要表现为强协同关系, 有30%以上的区划表现为协同,主要在塔克拉玛干沙漠荒漠区、南疆荒漠地区、吐鲁番盆地沙地地区南部、塔里木平原高覆盖草原地区北部、伊犁盆地高覆盖草原旱地地区、准噶尔盆地高覆盖草原旱地地区,而FP与其他四项生态系统服务相关性较低。(3)单因子作用下, 降水和NDVI对生态系统服务的权衡-协同关系的解释力较大。本文有助于明晰新疆生态系统服务的规律,基于生态过程在自然资源区划的空间分异特征,制定差异化生态补偿政策。

       

      Abstract: Xinjiang is the most typical representative of global temperate arid zone ecosystems, and carrying out spatial and temporal changes in ecosystem services and synergistic analyses of trade-offs in Xinjiang can help the sustainable development of the region.In this paper, based on satellite remote sensing data, the InVEST model was used to calculate soil retention (SR), habitat quality (HQ), water yield (WY), grain production (FP) and carbon stock (CS) in Xinjiang from 1990 to 2020, and to analyse the spatial and temporal distribution characteristics of each ecosystem service during different periods from the perspective of natural resource zoning. Meanwhile, the trade-off synergistic relationships among the five key ecosystem services were analysed using the Spearman correlation coefficient in R language and GeoDa software, and their drivers were analysed using the optimal geodetector. The results showed that; (1) the average annual WY, CS, SR, HQ and FP in Xinjiang from 1990 to 2020 were 575.9 × 108m3, 9.373 × 109m3, 17.538 × 109t, 0.47, 1119.64 × 104t, respectively. the high-value areas of several ecosystem services were mainly located in Altay Mountains, Tacheng Basin, Yili Basin, Junggar Basin and grassland areas of Tarim Plain.(2) CS-SR, HQ-SR, WY-HQ and WY-SR mainly showed strong synergistic relationships, with more than 30% of the zones showing synergistic relationships, mainly in the Taklamakan Desert desert area, the desert area of Southern Xinjiang, the southern part of the sandy area of the Turpan Basin, the northern part of the high-covered steppe area of the Tarim Plain, the high-covered steppe and dryland areas in the Yili Basin, the high-covered steppe and dryland areas of the Junggar Basin, and the high-covered steppe and dryland areas of the Junggar Basin. FP was less correlated with the other four ecosystem services.(3) The explanatory power of the trade-off-synergistic relationship between precipitation and NDVI on ecosystem services was greater under the effect of a single factor.This paper helps to clarify the law of ecosystem services in Xinjiang and formulate differentiated ecological compensation policies based on the spatial differentiation characteristics of ecological processes in natural resource zoning.

       

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