In 1993, 1998 and 2003 our forest ecosystem seven categories ecosystem services of the total economic value of 21411.80×10~8 yuan, 36433.26×10~8 yuan and 41237.23×10~8 yuan respectively, which has separately took up 98.81%、91.73% and 71.82% of GDP.
On the basis of transect theories,the region from latitude 25°N to latitude 35°N along the Yangtze Valley was firstly defined as West-East Transect of Southern China(WETSC)and the construction and layout pattern of forest ecosystem research station in the area of WESTC was put forward in this paper.
Oriental observations on 15 - year Casuarina oequisetifolia forest ecosystem in Huian,Fujian province Showed that the tatal amount of nutrient element in the ecosystem was316. 45kg/hm2, amount which, 99. 5% stored in soil layer.
The total store is 514.90 kg/hm~2 of the five kinds nutrient elements in the Robinia pseudoacacia forest ecosystem,and the tree layer nutrient element storage amount accouts for about 85.5 percent of total storage.
An ecosystem process model, BIOME-BGC, was used to explore the sensitivity of net primary productivity (NPP) of an oak (Quercus liaotungensis Koidz) forest ecosystem in Beijing area to global climate changes caused by increasing atmospheric CO_2 concentrations.
It has an important significance to study the reasonable percentage of forest cover for determining reasonable proportion of forestland in Sanjiang Plain, resuming forest ecosystem swiftly and surmouting the natural disaster.
Fine roots have enormous surface areas, growing and turning over quickly, which plays an important role in terms of substance cycling and energy flow in the forest ecosystem.
The soil microbial biomass and nutrient status under the native broadleaved forest and Cunninghamia lanceolata plantations at the Huitong National Research Station of Forest Ecosystem (in Hunan Province, midland of China) were examined in this study.
Chemical contents in precipitation change significantly when different kinds of external chemical materials are added, removed, translocated and transformed to or in the forest ecosystem along with precipitation.
Based on the data collected from 31 plots and 93 soil samples, the state of health of the forest ecosystem is discussed and the appropriate FHA age has been determined.
Castanea squinii Dode, an endemic tree widely distributed in China, plays an important role both in chestnut breeding and forest ecosystem function.