Landscape modeling of the potential natural vegetation of Santa Catalina Island, California.

摘要: The vegetation of Santa Catalina Island has been significantly transformed through a history introduction exotic plant species and disturbance by large introduced herbivores. Many these disturbances have reduced in recent decades, using measures such as carefully controlling the number bison removing cattle, sheep, feral pigs, goats. success subsequent restoration actions depends on choice right community for location, which may not be obvious an island with extensive areas dominated species. Environmental niche modeling is approach to re-create spatial distribution habitat types purpose. Such models, however, often require both presence absence data meaningful, while this scenario misleading because it reflect long disturbance. Maximum entropy technique model distributions presence-only that shown produce accurate results. We used tool environmental distinct types, conceptualized potential natural vegetation, means predict locations where would most successful prior anthropogenic Using existing map, we extracted random points from within polygons defining each native type. then modeled suitability high-resolution included elevation, aspect, hillshade, northeastness, slope, solar radiation, topographic wetness index. resulting models were combined map vegetation. A 1977 4 (woodland, chaparral, scrub, grassland) compared our Our new high complexity resolution. It also shows naturalistic responses topography are consistent broad patterns mapped providing fine-scale resolution inform efforts.