VEGETATION-INDEX MODELS PREDICT AREAS VULNERABLE TO PURPLE LOOSESTRIFE (LYTHRUM SALICARIA) INVASION IN KANSAS
Authors:
- Robert P. AndersonRARobert P. Anderson
- A. Townsend PetersonAPA. Townsend Peterson
- Stephen L. EgbertSEStephen L. Egbert
- 1 December 2006
- journal article
- Published by Southwestern Association of Naturalists in The Southwestern Naturalist
- Vol. 51 (4) , 471-480
Abstract
Purple loosestrife (Lythrum salicaria) constitutes an invasive species detrimental to wetland habitats in North America. To estimate areas vulnerable to it in Kansas, we modeled the potential geographic distribution of the species by using current records in the state, remotely sensed vegetation-index data from the Moderate Resolution Imaging Spectrometer (MODIS), and the Genetic Algorithm for Rule-Set Prediction (GARP). Models built using only localities from northeastern Kansas (the origin of invasion within the state) consistently predicted test localities in other parts of the state with negligible omission. An additional analysis using records from all counties where the species is known showed a similar prediction. All models indicated suitable conditions for purple loosestrife in much of eastern and central Kansas, as well as in riverine and irrigated areas in the western part of the state. The approach presented here might prove useful for assessing the regional colonization potential of ... Resumen Lythrum salicaria constituye una especie invasora perjudicial para los hábitats pantanosos en Norteamérica. Para estimar cuáles son las áreas vulnerables a esta especie en Kansas, modelamos la distribución potencial de la especie utilizando registros actuales del estado, datos de índices de vegetación tomados remotamente por el Moderate Resolution Imaging Spectrometer (MODIS), y el Genetic Algorithm for Rule-Set Prediction (GARP). Modelos construidos usando sólo las localidades del noreste de Kansas (el origen de la invasión dentro del estado) predijeron consistentemente a las localidades de prueba en otras partes del estado con omisión despreciable. Un análisis adicional usando registros de todos los condados en los cuales se conoce que la especie está presente mostró una predicción similar. Todos los modelos indicaron condiciones apropiadas para la especie en la mayor parte del este y del centro de Kansas, tanto como en áreas ribereñas e irrigadas en la parte occidental del estado. El enfoque pr...Keywords
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