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Abstract Detail

Conservation Biology

Martinez-Avalos, Jose [1], Mandujano, Maria [2], Golubov, Jordan [3], Jurado, Enrique [4], Sanchez-Ramos, Gerardo [1], Argomedo, Alicia [5].

Demography of the Endangered Star Cactus Astrophytum asterias (Lem.) Zucc., (Cactaceae).

Species of Cactaceae are well represented in national and international endangered species lists, however a small number of these have been studied demographically which could provide valuable information on the current status and future of these species. Specifically, species of Cactaceae are subject to changes in habitat through deterioration, fragmentation, land use changes, and illegal collection that adds to the growing threat of small populations. For Astrophytum asterias, a species that is highly values in the horticultural industry can only be found in small pockets that are subject to changes in land use. In this paper we studied the four most dense populations (found in two vegetation types) of A. asterias in Mexico. The purpose of the study was to determine the demographic parameters of these populations and provide information that could lead to decisions on the status of A. asterias in Mexico. We found that 3 out of 4 populations are in equilibrium where the most important demographic processes were stasis followed by growth and one population was above equilibrium where growth and reproduction were the most important demographic processes. Three of the four populations of A. asterias seem to be in good conditions, with one population facing a decreasing population growth (λs) however an effort must be made to preserve these remaining dense populations and implement if at all possible adequate management plans for the remaining seven populations.

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1 - Universidad Autonoma de Tamaulipas, Instituto de Ecología y Alimentos, Matamoros 8 y 9, 13 Blvd. Lopez Mateos 928, Victoria, Tamaulipas, 87040, Mexico
2 - Universidad Nacional Autonoma de Mexico, Instituto de Ecologia, Ciudad Universitaria, A.P. 70-275, Mexico, D.F., 04510, Mexico
3 - Universidad Autónoma Metropolitana-Xochimilco, El Hombre y su Ambiente, Calzada del Hueso 1100, Col. Villa Quietud, Coyoacán, México, D.F., D.F., 04960, México
4 - Universidad Autonoma de Nuevo Leon, Facultad de Ciencias Forestales, Edificio Rectoria, Monterrey, NL., Carretera Cd. Victoria-Linares, Linares, Nuevo Leon, 67000, Mexico
5 - Universidad Autonoma de Tamaulipas, Unidad Academica Multidisciplinaria Lic. Francisco Hernandez Garcia, Matamoros 8 y 9, Centro Univercitario, Cd. Victoria, Victoria, Tamaulipas, 87000, Mexico

Endangered species
grassland matrix
extinction risk.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PCB003
Abstract ID:790

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