International Journal of
Biodiversity and Conservation

  • Abbreviation: Int. J. Biodivers. Conserv.
  • Language: English
  • ISSN: 2141-243X
  • DOI: 10.5897/IJBC
  • Start Year: 2009
  • Published Articles: 536

Full Length Research Paper

Distribution and abundance of terrestrial orchids of the genus Bletia in sites with different degrees of disturbance, in the Cupatitzio Natural Reserve, México

María de los Ángeles Beltrán-Nambo1, Pilar Ortega Larrocea2, Rafael Salgado Garciglia3, Joel Tupac Otero Ospina4, Miguel Martínez Trujillo1 and Yazmín Carreón-Abud1*
  1Laboratory of Genetics and Microbiology, Faculty of Biology, Universidad Michoacana de San Nicolás de Hidalgo, México. 2Bio-edaphic Microcosm Laboratory, Department of Edaphology, Institute of Geology, Universidad Nacional Autónoma de México. 3Plant Biotechnology Laboratory, Institute of Chemical Biologics, Universidad Michoacana de San Nicolás de Hidalgo, México. 4National University of Colombia, Sede Palmira, Colombia.
Email: [email protected], [email protected]

  •  Accepted: 21 May 2012
  •  Published: 01 June 2012

Abstract

 

In this work, we determined the distribution and relative abundance of terrestrial orchids of the genusBletia in the Cupatitzio Natural Reserve, Michoacán, México, during two flowering seasons. Four different sampling sites were identified according to degree of disturbance and site quality. Relative abundance was established with an arbitrary scale of four values: abundant (>40 individuals), medium (20 to 40 individuals), low (<20 individuals) and null. Three species of orchids were found: Bletia roezliiwas the most abundant, with populations of over 40 specimens per 1000 min some sites (zones 1 and 3). It was present in all the reserve’s sites, although it showed better development in areas near roads and/or in open sites. Bletia purpurata had medium distribution and abundance, with more of 30 plants per site, having more presence in conserves sites (zone 3). Bletia punctata had the lowest abundance and distribution, with populations of 10 or less individuals, presenting a mean abundance of low disturbance sites. The distribution of the specimens of Bletia spp. is determined by factors such as the degree of disturbance of the sites where they develop, the adaptability of the species, theamount and morphotype of the mycorrhizal fungus, which is associated with their dispersibility of them, among other factors.

 

Key words: Orchid distribution, relative abundance, disturbance.

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