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Emergy evaluation of the artificial forest ecosystems in the watershed of Miyun Reservoir:a case study for ecosystems valuation and environmental management

引用

Ecological Economy 2007年第4期3卷 381-392页

作者： Hu Yanxia Zhou Liandi Dong Xiaobin Yan Maochao Institute for Integrated Development of Agriculture Beijing Academy of Ago-forestry Sciences Beijing 100097P.R.China Institute of Resource Beijing Normal University Beijing 100875P.R.China College of Agronomy and Biological Technology China Agricultural University Beijing 100094 P.R China Institute of Geographial Sciences and Natural Resource Resarch CAS Beijing 100094P.R.China

To build the artificial forest ecosystem is the major eco-economic development model in the watershed of Miyun Reservoir. It is very important to evaluate the benefits of those ecosystems. Emergy theories are very helpful for us to establish a science-based assessment framework. Emergy evaluation of the artificial forest ecosystems in the watershed of Miyun Reservoir is used to asses the relative values of several ecological functions (sometimes called ecosystem services) and main ecosystem storages (sometimes called natural capital). The main driving energies, internal processes and storages are evaluated. The main functions, including transpiration, GPP and infiltration, are evaluated, which are 609em$/ha/yr, 6,245em$/ha/yr and 340em$/ha/yr respectively. The total values of major environmental services are 4,683em$/ha/yr in the artificial forest ecosystem. The main storages of natural capital including live biomass, soil moisture, organic matter, underground water and landform are estimated, which are 112,028em$/ha, 9em$/ha, 40,718em$/ha, 34em$/ha and 6,400,514em$/ha respectively. The largest value is landform, which accounts for 97.7% of these calculated total emdollar values. The concept of replacement value is explored using the emergy values of both ecosystem services and natural capital. The total calculated replacement values are 302,160em$/ha.

关键词： artificial forest ecosystems Emergy evaluation Environmental services Natural capital

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