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Centro de Investigaciones Biológicas del Noroeste (CIBNOR) 2016

Evaluación de respuestas tempranas del hábitat en un diseño de manejo holístico de ganado en la Sierra Cacachilas, B.C.S.

Gomis Covos, Florent Jacques Francois

Titre : Evaluación de respuestas tempranas del hábitat en un diseño de manejo holístico de ganado en la Sierra Cacachilas, B.C.S.

Auteur : Gomis Covos, Florent Jacques Francois

Etablissement de soutenance : Centro de Investigaciones Biológicas del Noroeste (CIBNOR)

Grade : Maestría en Ciencias en el Uso, Manejo y Preservación de los Recursos Naturales 2016

Résumé
Livestock management, both intensive and extensive, has been detrimental to ecosystems worldwide. Since the early 80’s Allan Savory proposed holistic management, a livestock practice that has been favorable to the ecosystem in many arid and semiarid regions in the world. In Rancho Cacachilas, located in Sierra Cacachilas, Cape Region, B.C.S., began to implement this kind of management since November 2014. The aim of this study is to determine the ecological variables, plant biomass and soil physicochemical parameters in three sites under different types of management : holistic, traditional (continuous grazing) and an exclusion site. The three sites were analyzed in three different seasons : before the grazing effect, after the grazing effect and at the end of the growing season (end of the rainy season). In the holistic management area, 58 plant species belonging to 44 genera and 24 families, with a Shannon-Wiener diversity of 2.68 were identified. Meanwhile, in the traditional management area, 63 species, 48 genera and 26 families, with a diversity of 2.42 were recorded. On the exclusion site, 59 species, 41 genera and 23 families, with a diversity of 2.68 were found. Euphorbiaceae was the most important family, followed by Fabaceae, Acanthaceae, Anacardiaceae, Burseraceae, Asteraceae and Cactaceae. The most important species in the three types of management were Jatropha cinerea and Ruellia californica, both unpalatable. The dominance of grasses declined in all seasons in the traditional management area due to continuous grazing. In the holistic management area the biomass of little and very palatable species increased. In the holistic management pH increased from 6.71 to 7.28 in the growing season, while the values of the other two types of management remained the same. The concentrations of nitrogen in nitrite remained constant in the holistic management in the growing season, while in the other two types of management it declined. Both in holistic management and traditional management the concentration of nitrogen in nitrates and ammonium increased after the grazing effect. In general in this area of the Sierra Cacachilas and in the region, these habitat variables had not been characterized before, depending on the livestock activity in traditional and holistic management. These initial results of holistic management may be used as a baseline for future studies and livestock management plans in Sierra Cacachilas, in the Cape Region, and other arid zones.

Mots Clés : manejo holístico ; manejo tradicional ; ganadería ; efecto del pastoreo

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Page publiée le 29 novembre 2017