Simulating the spread and management of alien riparian weeds: are they out of control?
Simulating the spread and management of alien riparian weeds: are they out of control?
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模拟外来河岸杂草的传播和管理：它们是否失控了？
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
P. Hulme
中科院分区：
文献类型：
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作者：
R. Wadsworth;Yvonne C. Collingham;S. G. Willis;B. Huntley;P. Hulme
1.本文探讨了在何种情况下，控制方案可能会减少河岸生境的两种广泛的入侵杂草的范围：凤仙花（喜马拉雅香脂）和大猪草。
2.这两个物种的扩散是使用MIGRATE模型模拟的，这是一个空间上明确的模型，其中纳入了现实的人口参数和多种扩散机制。 一系列的控制方案的模拟运行在一个地理信息系统（GIS）使用真实的景观的基础上的地形，水文和土地覆盖图的郡达勒姆，英国。结果进行了解释，在集水区和区域尺度。
3.探讨了六种有代表性的优先控制策略，具体如下：随机，与人口密度有关，或根据杂草种群的大小、年龄（新的和旧的）或空间分布。 这些战略进行了评估，在不同的管理强度（每年处理的面积）和不同的效率（比例的植物被摧毁）以及及时性（多久，因为该物种成为建立）的实施。
4.根据杂草种群数量和空间分布特征进行优先控制的策略是最有效的，植物种群大小和空间分布是关键参数。 在控制后的流域或区域内的地理范围的减少总是较大的H。mantegazzianum比我。因为它的传播速度较慢。
5.只有以物种分布数据为基础的战略，并以相对较高的强度和效率，才有可能在区域范围内成功地控制这两个物种。 强调了了解种群的空间结构和现有的潜在生境以及能够监测根除方案进展情况的重要性。初步结论提供了在区域范围内消除这些物种的可行性。
1. This paper examines the circumstances under which control programmes may reduce the range of two widespread invasive weeds of riparian habitats: Impatiens glandulifera (Himalayan balsam) and Heracleum mantegazzianum (giant hogweed).
2. The spread of both species was modelled using MIGRATE, a spatially explicit model that incorporates realistic demographic parameters and multiple dispersal mechanisms. Simulations of a range of control scenarios were run within a geographical information system (GIS) using authentic landscapes based on topographic, hydrological and land cover maps of County Durham, UK. Results were interpreted at both a catchment and a regional scale.
3. Six representative strategies were explored that prioritized control as follows: at random, in relation to human population density, or by the size, age (new and old) or spatial distribution of weed populations. These strategies were assessed at different intensities of management (area treated per year) and for varying efficiencies (proportion of plants destroyed) as well as the timeliness (how long since the species became established) of implementations.
4. Strategies that prioritized control based on weed population and spatial characteristics were most effective, with plant population size and spatial distribution being the key parameters. The reduction in geographical range within a catchment or region following control was always greater for H. mantegazzianum than I. glandulifera due to its slower rate of spread.
5. Successful control of both species at a regional scale is only possible for strategies based on species distribution data, undertaken at relatively high intensities and efficiencies. The importance of understanding the spatial structure of the population and potential habitat available, as well as being able to monitor the progress of the eradication programme, is highlighted. Tentative conclusions are offered as to the feasibility of eradicating these species at a regional scale.