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2000-2014年人类活动对贵州省植被净初级生产力的影响
Impacts of human activities on net primary productivity of vegetation in Guizhou Province from 2000 to 2014

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盛叶子 1   曾蒙秀 1 *   林德根 1   彭海军 2   朱丽东 1   李凤全 1   余奕泓 1   王能静 1  
文摘 利用MODIS实际净初级生产力数据与CASA模型估算得到的潜在净初级生产力,建立贵州省2000-2014年人类活动相对贡献指数(RCI),并依据各县喀斯特地貌面积和等级比例探究其年际变化及空间分布特征,再通过相关分析辨析选定的人类活动因子对其的影响。结果表明:(1)贵州省RCI均小于-0.5,人类活动促进了植被净初级生产力的增加,以2007年为转折点,影响程度先增强后减弱;(2)贵州省东北部、中部及西部地区的RCI多大于0,人类活动对生态环境有负面干扰作用;东南部及北部边缘地带的RCI多小于-1,人类活动的正面影响较强;(3)贵州省中部、北部大部分地区的RCI缓慢下降,人类活动对植被的正面影响增强;东南部部分区域的RCI由负转正,人类活动负面干扰作用增强;西南边界地区的RCI呈上升趋势却仍为负值,人类干预程度呈减弱趋势;(4)贵州省农业活动在人类活动的负面影响中有重要作用;城镇化与经济发展对生态环境既有正面影响,也有不可避免的负面干扰。
其他语种文摘 Karst rocky desertification, the most significant ecological problem in Guizhou Province, southwestern Chi- na, is primarily driven by human activities in recent years. As a main signature of this phenomenon, vegetation degra- dation can be reflected by Net Primary Productivity (NPP), which is a key indicator of production capacity of the terres- trial ecosystem. However, so far less quantitative analyses have been made on the impact of human activities on vegeta- tive NPP in Guizhou Province, which is of great significance for coordinating the relationship between human activity and karst rocky desertification control, as well as improving the quality of karst eco-environment. In this study, we es- tablished the Relative Contribution Index (RCI) by using actual NPP (ANPP) based on MODIS MOD17A3 data and po- tential NPP (PNPP) based on the Carnegie Ames Stanford Approach (CASA) model. Then, in combination of the classi- fication of karst landform proportion, we analyzed the spatial-temporal variations of human activities and their influ- ence on NPP in Guizhou Province from 2000 to 2014. Finally we discussed the contributions rates of different factors for human activity on RCI values using Correlation Analysis (CA). The results indicate that human activities in Gui- zhou Province promoted the increase of NPP, and the degree of the influence first increased and then decreased from 2000 to 2014. In the southeastern and northern edges of Guizhou Province where the proportion of karst landform area is less than 51.8%, the RCI value fluctuated violently and was greatly affected by human activities. However, in the ar- eas where the proportion of karst landform is higher than 51.8%, the impact of human activities was relatively weaker and the variation was gentler. Additionally, human activities in the northeast, central and western parts of Guizhou Province generally had negative effects on the ecological environment from 2000 to 2014, while the effects in the south- eastern and northern marginal areas were positive. In the past 15 years, the positive impact of human activities on the ecological environment in most areas of central and northern Guizhou Province has increased, while the degree of hu- man intervention in the southwestern marginal area has decreased and the negative interference of human activities in some areas in the southeastern part has increased. Moreover, the CA results show that the total plant coverage area of crops, total agricultural output value, proportion of urban population, gross domestic product per head, disposable in- come of urban residents and highway mileage had significant positive correlation with RCI values of Guizhou Province during the period from 2000 to 2014, while the population density had a significant negative correlation with RCI val- ues. Among them, agricultural activities played an important role in the negative impact of human activities. On one hand, urbanization and economic development promoted the growth of livable demand and strengthened the positive impact of human activities on the ecological environment; on the other hand, they also expanded the demand for re- source development, transportation and public infrastructure. Thus, the destructive interference of human activities on the ecological environment was unavoidable. In addition, compared with other areas, the areas with moderate karst landforms were more likely to be negatively affected by agricultural production, urban development and highway con- struction.
来源 中国岩溶 ,2020,39(1):62-70 【扩展库】
DOI 10.11932/karst2020y01
关键词 净初级生产力 ; 人类活动 ; 贵州省 ; 相关分析
地址

1. 浙江师范大学地理与环境科学学院, 浙江, 金华, 321004  

2. 中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550081

语种 中文
文献类型 研究性论文
ISSN 1001-4810
学科 植物学
基金 浙江省自然科学基金项目 ;  国家级大学生创新训练计划项目 ;  国家自然科学基金项目 ;  贵州省项目
文献收藏号 CSCD:6735697

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引证文献 6 篇

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CSCD被引 7 次

2 马炳鑫 2000-2019年滇黔桂岩溶区植被NPP时空变化及与气候变化的关系研究 生态环境学报,2021,30(12):2285-2293
CSCD被引 16 次

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