|
|
Evaluación de elementos estructurales del hábitat del borrego cimarrón en la Sierra del Mechudo, Baja California Sur, México [ 189-203 ]Sergio Alvarez-Cárdenas, Patricia Galina-Tessaro, Sara Díaz-Castro, Israel Guerrero-Cárdenas, Aradit Castellanos-Vera y Erika Mesa-Zavala
Habitat lost and fragmentation can result in an isolated and local extinction risk for small populations like Ovis canadensis weemsi Goldman, 1937, in Sierra del Mechudo, Baja California Sur, Mexico. That is why it is important to evaluate the relationship between species and their habitat in order to design management and conservation plans. The object of this study was to evaluate structural elements of the habitat, Land Ruggedness Index (LRI) (escape terrain) and vegetation structure (visibility), which are determinant in anti-predator behavior of bighorn sheep. We made an analysis of use-availability of terrain types according to their LRI, and height and cover were measured from the perennial vegetation in three representative areas from the Sierra. Five different types of terrain were established and significant differences between use and availability were found, medium mountain ranges with ravines, high mountain ranges with canyons, and high mountain ranges with small canyons within big canyons were selected. Perennial vegetation is spaced with an average height of 1.3 m and 21% of cover, which means a good visibility for bighorn sheep. Besides evaluating sheep population and distribution periodically, considering the increase of human activities in the area, it is advisable to evaluate the structural habitat all along the Sierra del Mechudo. By evaluating the LRI, it would be possible to locate sensitive or critical areas that are important for management and conservation of bighorn sheep at least above 300 m in elevation. Abstract Full Text PDF General interest news article General interest summaries (when available)
Español: La pérdida de hábitat pone en riesgo de extinción a poblaciones pequeñas y aisladas, como es el caso del borrego cimarrón (Ovis canadensis weemsi) en la Sierra del Mechudo en el estado de Baja California. En este estudio se enfatiza la importancia de los movimientos intermontanos de borregos en busca de áreas adecuadas para reproducción, crianza, alimentación, agua e intercambio genético. Además, se determinó el papel de la rugosidad del terreno y de la estructura de la vegetación en el comportamiento del borrego para evadir la depredación. Por lo tanto, desde una perspectiva de conservación es importante mantener y restaurar aquellos elementos estructurales del hábitat que incrementen la conectividad entre poblaciones aisladas. The opinions expressed in reader comments are those of the author only, and do not necessarily reflect the opinions of other authors or Tropical Conservation Science. |
Tropical Conservation Science is an open-access e-journal that publishes research relating to conservation of tropical forests and other tropical ecosystems.
Volume 2: Issue 2 Table of Contents Articles All issues Mar 2008 Jun 2008 Sep 2008 Dec 2008 Mar 2009 Jun 2009 Sep 2009 Dec 2009 Mar 2010 Jun 2010 Sep 2010 Dec 2010 Mar 2011 Jun 2011 Sep 2011 Dec 2011 Mar 2012 Jun 2012 Sep 2012 Dec 2012 Mar 2013 Jun 2013 Aug 2013 Sep 2013 Nov 2013 Dec 2013 Mar 2014 Jun 2014 Sep 2014 Dec 2014 Mar 2015 Jun 2015 Sep 2015 Dec 2015 Mar 2016 Jun 2016 Most downloaded 2008 2009 2010 2011 2012 All time ADVERTISEMENT SEARCH This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
About | Privacy Copyright mongabay.com 2008-2014 |