雪宝顶及其周边区域NPP时空格局演变及气候响应  

Spatiotemporal Pattern Evolution and Climate Response of NPP in Xuebaoding and its Surrounding Area

作　　者：邱豪 王建华[1,2] 董廷旭 张雪茂[1] 严霜 QIU Hao;WANG Jianhua;DONG Tingxu;ZHANG Xuemao;YAN Shuang(College of Resources and Environmental Engineering,Mianyang Teachers'College,Mianyang,Sichuan 621006;Key Laboratory of Ecological Safety and Protection in Sichuan Province,Mianyang,Sichuan 621006)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621006 [2]生态安全与保护四川省重点实验室,四川绵阳621006

出　　处：《绵阳师范学院学报》2020年第2期78-85,共8页Journal of Mianyang Teachers＇ College

基　　金：生态安全与保护四川省重点实验室开放项目(ESP1804)

摘　　要：植被净初级生产力(NPP)是当前脆弱生态系统重建的重要指标之一.本文利用2008-2017年MODIS数据和CASA模型估算了雪宝顶区域近10aNPP,并通过一元线性回归分析、重标极差(R/S)分析预测了NPP变化趋势,相关系分析分析了区域NPP与气象因子的关系,结果表明:(1)雪宝顶区域NPP空间分布差异较大,呈东高西低;(2)近10a雪宝顶区域年均NPP值为398.34 gCm-2 a-1,整体呈波动下降的趋势下降,下降面积占区域95.7%;(3)雪宝顶区域未来大部分区域呈现上升趋势,占区域总面积的58%;(4)在年际尺度上,NPP与太阳辐射呈现正相关,且所有地表覆被类型均与太阳辐射呈正相关.该文对雪宝顶及其周边区域NPP的研究结果可为该区域生态环境修复提供科学依据.NPP is one of the important indicators for the reconstruction of fragile ecosystems.This paper provides a scientific basis for ecological environment restoration by studying the NPP of Xuebaoding and its surrounding area.In this paper,MODIS data and CASA model from 2008 to 2017 were used to estimate nearly 10aNPP in the Xuebaoding region.The variation trend of NPP was predicted by single linear regression analysis and relabeled range(R/S)analysis and Phase relationship analysis analyzed the regional NPP's relationship with meteorological factors.The results showed that:(1)There was a large difference in the spatial distribution of NPP in the Xuebaoding region,which was higher in the east and lower in the west.(2)The average annual NPP value of nearly 10a was 398.34 g cm-2a-1,showing a trend of fluctuation and decline,accounts for 95.7%of the area.(3)Most areas showed an upward trend in the future,accounting for 58%of the total area.(4)On the interannual scale,NPP was positively correlated with solar radiation;and all types of surface cover were positively correlated with solar radiation.

关 键 词：雪宝顶区域 植被净初级生产力 时空分布 变化趋势 相关性 

分 类 号：Q948[生物学—植物学]