定量评价人类活动对净初级生产力的影响

doi:10.13287/j.1001-9332.201708.019

应用生态学报 ›› 2017, Vol. 28 ›› Issue (8): 2535-2544.doi: 10.13287/j.1001-9332.201708.019

定量评价人类活动对净初级生产力的影响

吴艳艳^1,2, 吴志峰², 余世孝^1*

¹中山大学生命科学学院生态学系/有害生物控制与资源利用国家重点实验室/广州市城市景观生态演变重点实验室, 广州 510275
²广州大学地理科学学院/广东省地理国情监测与综合分析工程技术中心, 广州 510006

收稿日期:2016-12-29 发布日期:2017-08-18
通讯作者: * E-mail: lssysx@mail.sysu.edu.cn
作者简介:吴艳艳,女,1982年生,博士.主要从事景观生态学、环境遥感应用研究.E-mail:wuyy214@163.com
基金资助:
本文由广州市科信局及中山大学张宏达自然基金项目、国家自然科学基金项目(41671430)和广东省科技计划项目(2016A050502065)资助

Quantitative assessment of the impacts of human activities on net primary productivity

WU Yan-yan^1,2, WU Zhi-feng², YU Shi-xiao^1*

¹Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol/Guangzhou Key Laboratory of Urban Landscape Dynamics, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
²School of Geographical Sciences/Guangdong Province Engineering Technology Centre for Geographical Conditions Monitoring and Comprehensive Analysis, Guangzhou University, Guangzhou 510006, China

Received:2016-12-29 Published:2017-08-18
Contact: * E-mail: lssysx@mail.sysu.edu.cn
Supported by:
This work was supported by the Science and Information Technology Department of Guangzhou, the Zhang-Hongda Science Foundation at Sun Yat-sen University, the National Natural Science Foundation of China (41671430) and the Guangdong Province Science and Technology Plan Project (2016A050502065)

摘要/Abstract

摘要： 以人类活动为主导的城市扩张和土地覆被变化对城市生态环境产生了重要影响,并与气候变化共同影响植被净初级生产力(NPP),但目前从时空尺度上脱离气候干扰仅以人类活动为主导因素来定量分析其对植被NPP影响的研究尚不充分.本研究以广州市为研究区,利用CASA模型估算2001—2013年实际净初级生产力(NPP_act),结合CHIKUGO模型估算得到的潜在净初级生产力(NPP_p)计算因土地覆被变化导致的NPP损失(NPP_lulc),并建立相对贡献指数(RCI)定量分析和评价在城市扩张过程中人类活动对NPP的影响.结果表明:2001—2013年间,广州总体及其5片区NPP_act和NPP_lulc分别呈减少和增加趋势,并存在明显的空间差异性;RCI呈明显增加趋势,东北片区RCI值最低,为0.31,表明气候变化是其NPP变化的主要原因,其他4个片区的RCI值均高于0.5,说明4个片区人为干扰严重,人类活动是其NPP减少的主导因素;广州市及其5片区的RCI变化斜率均大于0,人类活动对植被的干扰逐年增强,北部片区RCI变化斜率值最大(0.693),人为干扰增加趋势最明显.

Abstract: Urban expansion and land cover changes driven primarily by human activities have significant influences on urban eco-environment, and together with climatic change jointly affect net primary productivity (NPP). However, quantitative analysis about the impacts of human activities on NPP change isolated from climatic change in the spatiotemporal scale is poorly understood. We took Guangzhou City as study area to estimate the actual NPP (NPP_act) and the potential NPP (NPP_p) from 2001 to 2013 based on Carnegie Ames Stanford Approach (CASA) model and CHIKUGO model, and calculated the loss of NPP due to land use and land cover change (NPP_lulc) from NPP_act and NPP_p. The impact of human activities on NPP in the process of urban sprawl was quantitatively analyzed and assessed by examining a relative contribution index (RCI) based on NPP_p and NPP_lulc. Guangzhou City and its five regions showed a declined trend of NPP_act and an increased trend of NPP_lulc from 2001 to 2013, and significant spatial differences of NPP_act and NPP_lulc were found in all regions. RCI had an increasing trend over 13 years, the smallest value of average RCI occurred in northeastern region (0.31), indicating climatic change was the main cause of NPP change, while the average RCI was higher than 0.5 in the other four regions, indicating that these regions were subjected to severe anthropogenic disturbances and human activities were the dominant factors of NPP reduction. The slopes of RCI change were positive in Guangzhou and its five regions, revealing an increasing human disturbance trend. Northern region had the largest RCI slope of 0.693, suggesting the trend was most obviously in this region.

吴艳艳, 吴志峰, 余世孝. 定量评价人类活动对净初级生产力的影响[J]. 应用生态学报, 2017, 28(8): 2535-2544.

WU Yan-yan, WU Zhi-feng, YU Shi-xiao. Quantitative assessment of the impacts of human activities on net primary productivity[J]. Chinese Journal of Applied Ecology, 2017, 28(8): 2535-2544.

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定量评价人类活动对净初级生产力的影响

Quantitative assessment of the impacts of human activities on net primary productivity

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