Scaling up ecosystem productivity from patch to landscape: a case study of Changbai Mountain Nature Reserve,China |
| |
Authors: | Na Zhang Zhenliang Yu Guirui Yu Jianguo Wu |
| |
Institution: | (1) College of Resources and Environment, Graduate University of Chinese Academy of Sciences, 19A Yu Quan Road, 3908, Beijing, 100049, P.R. China;(2) National Natural Science Foundation of China, Beijing, 100085, China;(3) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;(4) School of Life Sciences, Beijing Normal University, Beijing, 100875, China;(5) School of Life Sciences and Global Institute of Sustainability, Arizona State University, Tempe, AZ 85287, USA |
| |
Abstract: | Scaling up ecosystem processes from plots to landscapes is essential for understanding landscape structure and functioning
as well as for assessing ecological impacts of land use and climate change. This study illustrates an upscaling approach to
studying the spatiotemporal pattern of ecosystem processes in the Changbai Mountain Nature Reserve in northeastern China by
integrating simulation modeling, GIS, remote sensing data, and field-based observations. The ecosystem model incorporated
processes of energy transfer, plant physiology, carbon dynamics, and water cycling. Using a direct extrapolation scheme, the
patch-level ecosystem model was scaled up to quantify the landscape-level pattern of primary productivity and the carbon source-sink
relationship. The simulated net primary productivity (NPP) for the entire landscape, consisting of several ecosystem types,
was 0.680 kg C m−2 yr−1. The most widely distributed ecosystem type in this region was the mixed broad-leaved and Korean pine (Pinus koraiensis) forest, which had the highest NPP (1.084 kg C m−2 yr−1). The total annual NPP for all ecosystem types combined was estimated to be 1.332 Mt C yr−1. These results suggest that the Changbai Mountain landscape as a whole was a carbon sink, with a net carbon sequestration
rate of about 0.884 Mt C yr−1 for the study period. The simulated NPP agreed reasonably well with available field measurements at a number of locations
within the study landscape. Our study provides new insight into the relationship between landscape pattern and ecosystem processes,
and useful information for improving management practices in the Changbai Mountain Nature Reserve, which is one of the most
important forested landscapes in China. Several research needs are discussed to further refine the modeling approach and reduce
prediction uncertainties. |
| |
Keywords: | Scaling Extrapolation Ecosystem modeling Biogeochemical cycles Landscape pattern Net primary productivity Changbai Mountain Nature Reserve |
本文献已被 SpringerLink 等数据库收录! |
|