涪江流域植被净初级生产力时空变化及对气候的响应

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中文摘要：为涪江流域内生态环境的保护、自然资源的有效管理以及相应社会和经济发展战略的制订提供科学依据，基于MODIS NPP、年均气温、年降水量和年累计日照时数数据，采用重心法和相关分析研究了 2000-2020年涪江流域植被净初级生产力(net primary productivity，NPP)时空变化及对气候的响应。结果显示:在研究时段内涪江流域植被NPP呈"西北高东南低"的空间格局，多年平均NPP值以植被的碳质量计为568。22 g·m-2·a-1，以年均8。25 g·m-2(R2=0。802 3)速率呈波浪式递增趋势，流域植被NPP重心总体向东南方向演进。涪江流域内面积占比为64。96％的区域植被NPP变化受气候的影响，植被NPP与气候因子的相关性在宏观上都表现为正相关与负相关并存的空间格局，气候因子对流域植被NPP的影响程度和范围最大的为降水，然后依次是气温和日照。由上述结果可知，2000-2020年涪江流域植被NPP的时序变化存在波动性、空间分布及变化存在不均衡性;降水是影响流域内植被NPP时空变化的主要气候因子;建议在该流域上游地区侧重进行植被恢复、生态保护和预防灾害工作而在中、下游地区注重气象的定点预测与预报工作。

外文标题：Spatio-Temporal Variation of Net Primary Productivity of Vegetation and Its Response to Climate in Fujiang River Basin

外文摘要：Scientific support for the protection of the ecological environment,effective management of natural resources,and formulation of relevant socio-economic development strategies in the Fujiang River Basin is provided through the investigation of spatiotemporal changes in net primary productivity(NPP)of vegetation and its response to climate from 2000 to 2020.The analysis utilizes MODIS NPP data,average annual temperature,annual precipitation,and total annual sunshine hours with the centroid method and correlation analysis.Results indicate a spatial pattern of"high in the northwest and low in the southeast"for vegetation NPP in the Fujiang River Basin during the study period.The multi-year average NPP value,measured by the carbon mass of the vegetation,was 568.22 g·m-2·a-1,showing a wavelike increasing trend at an average annual rate of 8.25 g·m-2(R2=0.8023).The centroid of the basin's vegetation NPP generally shifted southeastward.Climate influenced NPP changes in 64.96％of the basin's area,with correlations between vegetation NPP and climate factors displaying a mixed spatial pattern of positive and negative correlations.Among the climate factors,precipitation exerted the greatest influence on the basin's vegetation NPP,followed by temperature and sunshine duration.The temporal variation in vegetation NPP in the Fujiang River Basin from 2000 to 2020 exhibited fluctuations,while the spatial distribution and changes were uneven.Precipitation emerged as the primary climatic factor affecting the spatiotemporal changes in vegetation NPP within the basin.Recommendations include focusing on vegetation restoration,ecological protection,and disaster prevention efforts in the upstream areas,while emphasizing localized meteorological predictions and forecasting in the midstream and downstream areas.

外文关键词：

Fujiang River Basinnet primary productivityspatiotemporal variationclimate response

作者：

邓小菲、杜华明、王雪梅、陈浩

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作者单位：

绵阳师范学院生态安全与保护四川省重点实验室

绵阳师范学院资源环境工程学院,四川绵阳 621000

关键词：

涪江流域净初级生产力重心气候响应

基金：

国家自然科学基金青年科学基金项目国家社会科学基金重点项目生态安全与保护四川省重点实验室开放基金项目四川县域经济发展研究中心课题四川县域经济发展研究中心课题四川县域经济发展研究中心课题

项目编号：

3210136314AZD094ESP2107xy2017030xy2019018xy2021028

出版年：

2024

DOI：

10.11721/cqnuj20240309

重庆师范大学学报(自然科学版)

重庆师范大学

重庆师范大学学报(自然科学版)

CSTPCD北大核心

影响因子：0.652

ISSN：1672-6693

年,卷(期)：2024.41(3)