Abstract
Determining conservation priorities requires an understanding of biological diversity in terms of both genetic variation and phenotypic difference. The phenotype is where many adaptations are expressed and thus provides the potential for future evolution, including responses to rapidly changing environments. We suggest that applying geometric morphometrics (a set of methods related to image analysis) to the study of morphological differences among closely related populations can effectively quantify phenotypic variation in poorly studied taxa, and provide an informative estimate of the degree of morphological divergence relative to their better known relatives. The approach is simple and flexible, but has proven to be powerful. As an example of a Geometric Morphometric approach to the study of Biological Diversity (GeMBiD), we provide a preliminary estimate of the morphological distinctiveness of a poorly studied red colobus monkey, the Semliki red colobus (Procolobus sp. ellioti), by using cross-validated discriminant analyses on cranial shape data and comparing chance-corrected classification accuracy in this population with that of other populations of monkeys within and outside the red colobus lineage. By fruitfully exploiting available museum collections and by developing networks of scientists who can provide information on and study material from rare populations, GeMBiD could become a useful tool for complementing genetic analyses of biodiversity.
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Acknowledgments
We thank the many people who contributed directly and indirectly to this work. We thank Kate Nowak (Princeton University) for her permission to use specimens of Procolobus kirkii specimens that she collected from Zanzibar. We also thank Nelson Ting (City University of New York) and his coauthors in the study of the molecular systematics of Piliocolobus for sharing their preliminary results with us. We thank the editor, Joanna M. Setchell (Durham University), Eric Delson (City University of New York), and an anonymous referee, whose comments and suggestions substantially improved this paper. We also thank all the museum curators and collection managers who allowed us to study their specimens and who greatly helped during data collection.
This study was funded by grants from the Leverhulme Trust, Ruggles-Gates Fund for Biological Anthropology and the Royal Society.
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Cardini, A., Elton, S. GeMBiD, a Geometric Morphometric Approach to the Study of Biological Diversity: An Example Study of the Red Colobus (Procolobus [Piliocolobus]) Species Complex. Int J Primatol 32, 377–389 (2011). https://doi.org/10.1007/s10764-010-9475-6
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DOI: https://doi.org/10.1007/s10764-010-9475-6