Affiliation:
1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
Abstract
Human activities and environmental changes have influenced the changes in landscape patterns, which in turn profoundly impact the variation in net primary productivity (NPP) of vegetation. Understanding the relationship between landscape patterns and NPP is of significant importance for maintaining ecosystem stability and improving the ecological environment. In this study, six land use types in the arid and semi-arid regions of Northwest China were selected, and five landscape pattern indices at the landscape level and four landscape pattern indices at the class level were used. Pearson correlation and multiple linear regression models were employed to analyze the relationship between landscape indices and NPP at a 100 km × 100 km grid scale. The results indicate that there are varying degrees of correlation between landscape pattern indices and NPP from 2001 to 2020, with different levels of variation over the 20-year period. The correlation between indices and NPP is higher at the class level than at the landscape level, and the increase in landscape abundance and fragmentation promotes an increase in NPP. At the landscape level, three landscape indices, namely NP (Number of Patches), PR (Patch Richness), and SHDI (Shannon’s Diversity Index), explain 45.4% of the variation in NPP. At the class level, NP, TE (Total Edge Length), and IJI (Dispersion and Juxtaposition Index) are the main influencing factors for NPP in cropland, forestland, and grassland. Therefore, in ecological governance, it is necessary to consider landscape pattern changes appropriately to maintain ecosystem stability.
Funder
National Natural Science Foundation Project
Subject
Nature and Landscape Conservation,Ecology,Global and Planetary Change
Reference65 articles.
1. Changes in landscape patterns in Georgia, USA;Turner;Landsc. Ecol.,1998
2. Trends in the use of landscape spatial metrics as landscape indicators: A review;Uuemaa;Ecol. Indic.,2013
3. Effects of land-use changes on vegetation net primary productivity in the Three Gorges Reservoir Area of Chongqing;Zhao;Acta Ecol. Sinica.,2018
4. Effects of land use change on net primary productivity in Beijing based on MODIS series;Cheng;Acta Ecol. Sinica.,2017
5. A landscape analysis of land cover change in the Municipality of Rome (Italy): Spatiotemporal characteristics and ecological implications of land cover transitions from 1954 to 2001;Frondoni;Landsc. Urban Plan,2011
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