Landscape heterogeneity and net primary productivity (NPP) of mountain-oasis-desert ecosystems in western China

Jie Zhang; Xiaoling Pan; Zhiqiang Gao; Wei Gao; Suling Zhao; Qingdong Shi; Guanghui Lu

doi:10.1117/12.524183

22 December 2003 Landscape heterogeneity and net primary productivity (NPP) of mountain-oasis-desert ecosystems in western China

Jie Zhang, Xiaoling Pan, Zhiqiang Gao, Wei Gao, Suling Zhao, Qingdong Shi, Guanghui Lu

Author Affiliations +

Proceedings Volume 5153, Ecosystems' Dynamics, Agricultural Remote Sensing and Modeling, and Site-Specific Agriculture; (2003) https://doi.org/10.1117/12.524183
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

This study was conducted to develop an appropriate assessment technique to define impact of mountain-desert-oasis ecosystem on net primary productivity (NPP) in northern foothills of Tianshan Mountains. Geographic Information System (GIS) was used to estimate land use/land cover of the mountain, desert and oasis zones. An ecological process model was used to estimate NPP by using data entirely derived from satellite. The results show that landscape heterogeneity was important factor to affect NPP values in mountain-desert-oasis ecosystem. Simulated results indicated a total annual NPP of 1.5081×10¹⁴ g C for selected transect in 2002. There was 32.67% of total NPP which came from oasis areas, 28.16% from alpine meadows areas, 9.15% from forests area. Mean NPP values over the selected transect was 150.29 g C m^-2 year^-1 in 2002. However, NPP values varied greatly with different geography and season.

Citation Download Citation

Jie Zhang, Xiaoling Pan, Zhiqiang Gao, Wei Gao, Suling Zhao, Qingdong Shi, and Guanghui Lu "Landscape heterogeneity and net primary productivity (NPP) of mountain-oasis-desert ecosystems in western China", Proc. SPIE 5153, Ecosystems' Dynamics, Agricultural Remote Sensing and Modeling, and Site-Specific Agriculture, (22 December 2003); https://doi.org/10.1117/12.524183

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