Tropical and Subtropical Lichens: Diversity and Floristics
Perez-Perez, Rosa E. , Herrera-Campos, Maria A. , Esslinger, Theodore L. , Egan, Robert S. , Luecking, Robert , Nash III, Thomas H. .
Mexican Parmeliaceae: A Diversity Hot Spot.
Mexico due its size and the complex of its mountain chains exhibit a high landscapes, climatic, and land diversity. The megadiversity countries shelters ca. 70% of species diversity of the world and, Mexico itís a refuge of vascular plants (26000 sp.), amphibians (284 sp.), reptiles (717 sp.) and, mammals (450 sp.). For this reason it is considered a Centre of Plant and Animal Diversity. However, the knowledge of the lichens of Mexico is quite limited and the number of lichen species occurring in the country is highly uncertain. We focus on the Parmeliaceae family due to its importance in various ecosystems and in the pharmaceutical industry. In addition, it includes many of the most conspicuous lichens, including those most likely collected by the lichenologists in the past and the future. Therefore, it is essential to be able to identify them; consequently we are developing on-line keying programs. Preliminary results indicate that at least 449 species in the family occur in Mexico. The most species rich genera include Usnea (100 sp.), Xanthoparmelia (61 sp.), Hypotrachyna (50 sp.) Parmotrema (50 sp.), Oropogon (20 sp.), Bryoria, Bulbothrix, Everniastrum, Hypogymnia and, Punctelia (10 sp. each one of them). One of the Ecosystems more important is the pine-oak woodlands; and the state with the highest lichen diversity in the Parmeliaceae is Oaxaca.
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1 - Universidad Autonoma del Estado de Morelos, Facultad de Ciencias Biologicas, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, 62210, Mexico
2 - Universidad Nacional Autonoma de Mexico , Instituto de Biologia, Departamento de Botanica, Apdo. Postal 70-233, Coyoacan, Mexico, D. F., 04510, Mexico
3 - North Dakota State University, Department of Biology, Stevens Hall, Fargo, North Dakota, 58105-5517, USA
4 - University of Nebraska Omaha, Department of Biology, 114 Allwine Hall, Omaha, Nebraska, 68182-0040, USA
5 - The Field Museum, Department of Botany, 1400 S. Lake Shore Dr., Chicago, IL, 60605, USA
6 - Arizona State University, School of Life Sciences, P.O. Box 874501, Tempe, Arizona, 85287-4501, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Ballroom 2/Cliff Lodge - Level B
Date: Tuesday, July 28th, 2009
Time: 2:45 PM