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Messages from IslandsA Global Biodiversity Tour$
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Ilkka Hanski

Print publication date: 2016

Print ISBN-13: 9780226406305

Published to Chicago Scholarship Online: September 2017

DOI: 10.7208/chicago/9780226406589.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 26 September 2021

Species on the Move

Species on the Move

Chapter:
(p.114) 4 Species on the Move (p.115)
Source:
Messages from Islands
Author(s):

Ilkka Hanski

Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226406589.003.0004

This chapter discusses the dynamics of species invasion and its impact on biodiversity based on research at San Sebastian de la Gomera on Canary Islands, where the author of this book first arrived on December 28, 1976. Species that colonize islands are often ecological generalists that flourish in early successional, disturbed habitats. Over time, these species adapt to the prevailing environmental conditions and become more specialized, which may ultimately increase their risk of extinction from islands, while new generalists arrive to compensate for extinctions. The chapter talks about an endemic species, Calliphora splendens and the vulnerability of the Azores to invasion by alien plant species. It cites the IUCN list of 100 of the worst invasive species in the world that includes the domestic cat and the cane toad. Finally, the chapter discusses assisted migration and how it has contributed to the decline in biodiversity.

Keywords:   species invasion, biodiversity, San Sebastian de la Gomera, Canary Islands, habitats, Calliphora splendens, Azores, invasive species, assisted migration, alien plant species

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