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18 - A critical appraisal of the meaning and diagnosability of cryptic evolutionary diversity, and its implications for conservation in the face of climate change

from Section 4 - Conservation

Published online by Cambridge University Press:  16 May 2011

By
J. Bernardo
Edited by
Trevor R. Hodkinson ,
Michael B. Jones ,
Stephen Waldren  and
John A. N. Parnell
J. Bernardo
Affiliation:
Cornell University, Roan Mountain, TN, USA
Trevor R. Hodkinson
Affiliation:
Trinity College, Dublin
Michael B. Jones
Affiliation:
Trinity College, Dublin
Stephen Waldren
Affiliation:
Trinity College, Dublin
John A. N. Parnell
Affiliation:
Trinity College, Dublin
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Summary

Abstract

Accurate species delimitation is a foundational assumption of biological research. It is especially relevant to conservation, because species names are the currency for conservation policy. Cryptic species are species that are deeply genetically divergent from other such lineages, but that have escaped detection and description because they lack obvious morphological discontinuities. They are not necessarily closely related. Genetic data have revealed surprising amounts of cryptic diversity, which has provoked numerous criticisms concerning their taxonomic recognition and relevance to conservation. I critically examine these and other concerns in the context of a hypothetico-deductive framework (HDF) for species delimitation and conclude that they are unfounded. I explore links between taxonomy and systematics with respect to cryptic species recognition, claims about the relative usefulness of morphological versus genetic data for species delimitation, and the kinds of inferential errors that attach to the process of inferring species boundaries. The balance of the chapter shows that the description of cryptic diversity is an important enterprise and considers its implications for conservation biology, especially in the context of global warming.

Introduction

Biodiversity conservation is a multidisciplinary enterprise that seeks to preserve species diversity in the form of ecologically and evolutionarily viable populations.

Type
Chapter
Information
Climate Change, Ecology and Systematics , pp. 380 - 438
Publisher: Cambridge University Press
Print publication year: 2011

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