TNC Global Invasive Species Team page


	The Global Invasive Species Team

Introduction

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Some invasive plants alter soil nutrient dynamics and soil chemistry. The shrub shown in the center of this photo from Hawai'i Volcanoes National Park on the Big Island of Hawai'i is fire tree (Myrica faya). This species is an actinorhizal nitrogen-fixer which invades undisturbed native communities on young, nitrogen-poor volcanic soils. These communities previously lacked symbiotic nitrogen fixing plants and the increases in soil nitrogen encourage invasions by other non-native plants and increase populations of non-native earthworms (Vitousek et al. 1987, Vitousek and Walker 1989, Aplet 1990).

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Center for Invasive Species and Ecosystem Health