汉江上游生态系统服务权衡与协同关系时空特征

发布时间：2019-02-24 14:33

【摘要】：多种生态系统服务之间的相互关系研究是生态系统服务研究的热点问题。目前,有关多种生态系统服务权衡与协同的研究多停留在定性描述阶段,缺乏具备空间位置信息的定量研究。综合土地利用、NDVI、土壤类型、气象等多源数据,对汉江上游流域2000-2013年的土壤保持服务、产水服务、植被碳固定(NPP)服务进行空间制图,并基于逐像元偏相关的时空统计制图方法,对三种生态系统服务之间的权衡与协同关系时空变化进行分析。结果表明:(1)2000-2013年,汉江上游多年平均土壤保持量为434.20 t·hm-2·yr-1,且多年来以16.10 t·hm-2·yr-1速率递增。多年平均产水量为250.34 mm,多年递增速率为3.79 mm·yr-1。NPP多年平均值为854.11 g C·m-2·yr-1,多年递减速率为8.54 g C·m-2·yr-1。(2)汉江上游土壤保持量在空间上呈现出"南北山地高,河谷盆地低"的分布格局;植被NPP在空间上表现为汉江河谷地带低,其余地方高的态势;产水服务在空间上呈现由北向南递增的分布规律。(3)整个汉江上游流域土壤保持与NPP、土壤保持与产水服务均以权衡关系为主,权衡关系区域的面积占比分别达到62.77%和71.60%;NPP与产水服务以协同关系为主,协同关系的面积占比达到62.89%。(4)林地、湿地、耕地、人工表面及裸地中,土壤保持与NPP服务、土壤保持与产水服务在空间上以权衡关系为主,产水与NPP服务在空间上以协同关系为主;而草地表现为三种服务两两之间均以权衡关系为主。定量评估生态系统服务相互关系的时空特征,有利于研究生态系统服务之间相互关系在时间上的非线性变化以及空间上的分布异质性,对区域土地管理与生态系统服务优化具有重要的指导意义。
[Abstract]:The research on the interrelationship between multiple ecosystem services is a hot issue in ecosystem services research. At present, the researches on the trade-off and collaboration of multiple ecosystem services remain in the stage of qualitative description, and lack of quantitative research with spatial location information. The spatial mapping of soil conservation service, water production service and vegetation carbon fixation (NPP) service in the upper reaches of the Hanjiang River from 2000 to 2013 was carried out by comprehensive land use, NDVI, soil type, meteorology and other multi-source data. Based on the Pixel-by-pixel partial correlation method of spatio-temporal statistical mapping, the trade-offs between three ecosystem services and the spatial and temporal changes of synergetic relationships are analyzed. The results showed that: (1) from 2000 to 2013, the average soil conservation in the upper reaches of the Hanjiang River was 434.20 t / hm-2 yr-1, and increased at the rate of 16.10 t / hm-2 yr-1 over the years. The annual average water yield is 250.34 mm, the annual increment rate is 3.79 mm yr-1.NPP, the annual average is 854.11 g cm -2 yr-1,. The annual decline rate is 8.54 g / cm ~ (-2) yr-1. (2) soil conservation in the upper reaches of the Hanjiang River shows a spatial distribution pattern of "high mountain in the north and south, low in the valley basin"; The vegetation NPP is low in the Hanjiang River valley and high in the other places. The spatial distribution of water production services increased from north to south. (3) the trade-off relationship between soil conservation and NPP, soil conservation and water production service in the upper reaches of Hanjiang River was dominant. The area of weighing relation area reached 62.77% and 71.60% respectively; The area of NPP and water production service was mainly synergistic. (4) soil conservation and NPP service were found in forestland, wetland, cultivated land, artificial surface and bare land. The trade-off relationship between soil conservation and water production services was dominant in space, and the synergistic relationship between water production and NPP services was dominant in space. The grassland showed that the trade-off relationship between the three services was dominant. Quantitative assessment of the temporal and spatial characteristics of ecosystem service interrelationships is beneficial to the study of the temporal nonlinearity and spatial distribution heterogeneity of ecosystem services. It has important guiding significance for regional land management and ecosystem service optimization.
【作者单位】：陕西师范大学地理科学与旅游学院;密歇根州立大学系统综合与可持续发展研究中心;中国科学院生态环境研究中心;
【基金】：中国博士后科学基金项目(2016M592743) 国家自然科学基金项目(41601182,41371497) 国家社会科学基金项目(14AZD094) 教育部人文社会科学重点研究基地重大项目(15JJD790022) 陕西省自然科学基础研究计划青年项目(2017JQ4009) 国家重点研发计划(2016YFC0501601) 陕西师范大学高校基本科研业务费专项资金项目(GK201603078)~~
【分类号】：X171.1

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