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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: 16 September 2021

Changing Biodiversity

Changing Biodiversity

(p.76) 3 Changing Biodiversity (p.77)
Messages from Islands

Ilkka Hanski

University of Chicago Press

This chapter explains why and how biodiversity changes based on research of species and species richness on Haminanluoto, an island in the easternpart of the Gulf of Finland in the Baltic Sea. The composition of the bird community on Haminanluoto has changed dramatically; especially noteworthy is the increase in the numbers of large-bodied species such as swans, geese, ducks, and gulls. In contrast, small-bodied species, waders and passerines, have declined. The chapter first considers the fate of large-bodied species and why the geographical distributions of beetles and butterflies on Haminanluoto are shifting due to human-caused climate change. It shows that species may track changing environmental conditions by shifting their geographical ranges or by adapting to new conditions and concludes by discussing the current rate of species extinctions.

Keywords:   biodiversity, species, species richness, Haminanluoto, Gulf of Finland, large-bodied species, geographical distribution, climate change, geographical range, extinction

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