基于LANDIS的西水林场森林景观动态模拟研究

Dynamic Simulation of Forest Landscape in Xishui Forest Farm Based on LANDIS

以甘肃省张掖市祁连山西水林场为研究区,基于资源3号卫星遥感影像和该林场森林资源二类调查数据,应用空间直观景观模型LANDIS模拟、预测林区300a(2013—2313年)内森林景观的自然演替,并通过优势树种所占的斑块面积百分比、相对聚集度指数、景观Shannon-Weaver多样性指数、分维数指数以及Shannon均匀度等景观评价指数对模拟结果进行分析评价。结果表明,在西水林场森林景观未来300a演替模拟过程中,青海云杉一直占据优势地位,祁连圆柏和山杨处于弱势地位,对研究区景观格局的影响小;西水林场景观中的斑块聚集程度较高,连通性好,但景观多样性较低,分布不均匀。该研究结果可为该林场开展森林经营、合理配置森林资源、维持森林景观及提高森林质量提供参考。

This paper used LANDIS model to simulate the forest area in 300 years （2013-2313） based on the resources satellite three remote sensing image and the forest resources second survey data. We selected several Landscape indexes such as percentage of landscape, aggregation index, fractal dimension index, Shannon＇s diversity index, Shannon＇s eveness index to evaluate the results of simulation. The results showed that compared to Sabina przewalskii and Populus davidiana ,Picea crassifolia had a dominant position in the process of succession in the next 300 years, and had small impact to the landscape pattern of study area. The Xishui Forest Farm had high plaque aggregation,good connectivity,but low landscape diversity,and uneven distribution. All of these results could provide reference for forest management to benefit to allocate the forest resources rationally,and improve the forest quality.