Dynamic Analysis Of Forest Resources And Biodiversity Economic Value In Yingchun Forestry Bureau

The everlasting use of forest resources has always been the base of forestry sustainable development. The structure of forest stand and landscape has changed badly because of mankind's badly exploitation. Forest biodiversity's quick losing makes the economic value of forest biodiversity more and more important. Now the evaluation of economic value of forest biodiversity has been the domestic and international focus and difficult topic. Using the forest management data and other data of past 44 years, the spatial database of forest resources was set up; forest resources structure and landscape dynamic change were systemic analyzed. The economic value of forest biodiversity and its dynamic change were analyzed too. Main contents as follows:First, dynamic development and change process of forest resources during the past 44 years were analyzed which include the change of various land area, forest origin area, dominant forest stand type, forest age, forest volume, forest productivity and forest density. The reason of making forest resources worse was studied. It is pointed out that the scientific method should be taken to regulate the structure of forest resource in the future.The result shows that on one hand, the area of open forest land, wasteland and cut-over land decreased because of strongly planting forestation, and make the structure of land use and forest coverage reasonable. At the same time, coniferous forest and broadleaf and needle-leaf mixed forest emerged; the rate of forest plantation becomes more than the percentage of 20, which lead to more economic value. On the other hand, other series of internal structures of forest resources are maladjusted in different degree, which can't develop all kinds of benefit of forest well. The structure of dominant forest stand area and forest age develop to unreasonable trend which the dominant position of matured and over matured forest was replaced by young growth and half mature forest. It's difficult to realize sustainable development. From 1960 to 1994, forest volume decreased 33.13%. But in 2004, forest volume goes up to the level of 1960, but forest productivity decreased to 2.96m³Â·(hm^-2·a), and the average forest coverage dropped from 0.67 to 0.57, which lead to bad ecological benefits.Second, the landscape dynamic change from 1960 and 2004 was analyzed. The result shows that the landscape further falls into pieces, becomes more fragmental. Forest is the main landscape type, but its quality descent. In 1994, the number of patch increased 53.13%, but the average area of patch decreased 34.73%. The patch number of 2004 is 2.4 times more than that of 1994, and the average area decreased 59.97%. The number of small patch increased, the number of big patch decreased, variety index and evenness index increased, dominance index decreased, matured and over matured forest patch increased and young growth, half mature forest decreased and the landscape type of 1994 increased. For the type of clear cutting was always adopted and the forest management...