Fossil pollen as a guide to conservation in the Galapagos.

van Leeuwen, Jacqueline F N; Froyd, Cynthia A; van der Knaap, W O; Coffey, Emily E; Tye, Alan; Willis, Katherine J

van Leeuwen, Jacqueline F N; Froyd, Cynthia A; van der Knaap, W O; Coffey, Emily E; Tye, Alan; Willis, Katherine J.

Afiliação

van Leeuwen JF; Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland.

Science ; 322(5905): 1206, 2008 Nov 21.

Article em En | MEDLINE | ID: mdl-19023075

RESUMO

Paleoecological evidence from the past 8000 years in the Galápagos Islands shows that six presumed introduced or doubtfully native species (Ageratum conyzoides, Borreria laevis/Diodia radula-type, Brickellia diffusa, Cuphea carthagenensis, Hibiscus diversifolius, and Ranunculus flagelliformis) are in fact native to the archipelago. Fossil pollen and macrofossils from four sites in the highlands of Santa Cruz Island reveal that all were present thousands of years before the advent of human impact, refuting their classification as introduced species. These findings have substantial implications not only for conservation in Galápagos but for the management of introduced species and pantropical weeds in general.

Assuntos

Conservação dos Recursos Naturais; Fósseis; Pólen; Ecologia/métodos; Ecossistema; Equador; Humanos; Magnoliopsida

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Pólen / Conservação dos Recursos Naturais / Fósseis Limite: Humans País/Região como assunto: America do sul / Ecuador Idioma: En Revista: Science Ano de publicação: 2008 Tipo de documento: Article País de afiliação: Suíça País de publicação: Estados Unidos

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