|
|
|
| Patch distribution character of beach vegetation and its ecological importance |
| Jiang Bo1,2, Yuan Wei-gao1, Qi Lian-zhong1, Zhu Jin-ru1, Shen Ai-hua1 |
| 1. Zhejiang forestry academy, HangZhou 310023; 2. College of Forest Resources and Environment, Beijing Forestry University, Beijing 100083, China |
|
|
|
|
Abstract Patch size is a main parameter of landscapecharacter study. It can affect species dynamics、potential habit、potential forest productor(timber)、energy、nutrient、stream and other parameters. In this study, the beach land in fuyang was divided into 6 groups and 81 types which were further classified as low level patch(corresponded based types) or high level patch(corresponded main types). Maximum likehood estimate method was applied in this study. The results showed that low level patch had the higher homogenous, while high level patch had lower homogenous nature. The distribution of the patch size in these two patch levels is obviously trended right. Only a few distributions of type patch size was complied with negative exponent distribution, while the major was complied with log normal distribution. The results provided an idea for the stability and protection of community and ecology system in patches.
|
|
Received: 25 April 2005
|
|
|
|
|
|
| [1] 郭晋平,王俊田,李世光.2000.关帝山林区景观要素沿环境梯度分布趋势的研究[J].植物生态学报,24(2):135-140.
[2] 王宪礼,肖笃宁,布仁仓,等.1997.辽河三角洲湿地的景观格局分析[J].生态学报,17(3):31 7-323.
[3] 刘灿然,陈灵芝.1999.北京地区植被景观中斑块大小的分布特征[J].植物学报,41(2):199-205.
[4] A Writing Group in the East China Institute of of Water Conservancy. 1981. Foundamentals of Probability and Mathematical Statistics for Hydrology[M]. Beijing:Water Conservancy Press(in China).
[5] A Writing Group in Mathematics and Mechanics Department of Zhongshan University. 1980. Probability Theory and Mathematical Statistics[M]. Beijing:People's Education Press(in China).
[6] Baskent E Z, Jorden G A. 1995. Characterizing spatial structure of forest landscape[J]. Can J For Res, 25:1830-1849.
[7] Kotliar N B and Wiens J A. 1990. Multiple scales of patchiness and patch structure:A hierarchical framework for thestudy of heterogeneity[J]. Oikos, 59:253-260.
[8] MladnoffD J, White M A, Pastor J, et al 1993. Comparing spatial pattern in unaltered old-growth and disturbed forest landscapes[J]. Ecol Appl, 3:294-306. |
|
|
|
