Published online by Cambridge University Press: 25 August 2009
Plant invasions pose a current and increasing threat to species diversity and composition of forests worldwide. Biological invasions are natural ecological processes and the movement of plants across geographic barriers has always occurred (Sauer 1988), but humans have greatly accelerated the rate of introductions and moved plants across barriers that probably would not have been spanned naturally. Many of these plant introductions, whether deliberate or accidental, have had negative effects in the areas of introduction. Plant invasions have led to native species loss, altered ecosystem-level processes and caused enormous economic and environmental damage in various ecosystems, including tropical forests (Vitousek et al. 1987; Gordon 1998; Parker et al. 1999; Mack et al. 2000). Remote tropical islands and fragmented landscapes are particularly vulnerable to invasion by non-native plants (Laurance et al. 2002; Denslow 2003), but continental species-rich tropical rainforests also are invasible (Usher 1991; Rejmánek 1996a), particularly following natural or human disturbance (Whitmore 1991). Because of such negative impacts, species invasions are seen as one of the primary agents of global change (Vitousek et al. 1996), and tropical forests are unlikely to be immune (Fine 2002).
This chapter explores how biotic interactions, particularly herbivory and pathogen attack, may affect the abundance and distribution of invasive woody species in tropical rainforests. Specifically, I examine whether herbivores and fungal pathogens (natural enemies) are important determinants of species' abundance and distribution in their native ranges and whether the absence or reduced impact of these natural enemies may explain why certain introduced woody plants are successful invaders in tropical rainforests.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.