scholarly journals Flora of the core zones of the Monarch Butterfly Biosphere Reserve, Mexico: composition, geographical affinities and beta diversity

2017 ◽  
Vol 95 (1) ◽  
pp. 103 ◽  
Author(s):  
Guadalupe Cornejo-Tenorio ◽  
Guillermo Ibarra-Manriquez
2021 ◽  
Author(s):  
José Juan Flores-Martínez ◽  
Anuar Martínez-Pacheco ◽  
Eduardo Rendón-Salinas ◽  
Jorge Rickards ◽  
Sahotra Sarkar ◽  
...  

Author(s):  
José Juan Flores-Martínez ◽  
Anuar Martínez-Pacheco ◽  
Eduardo Rendón-Salinas ◽  
Jorge Rickards ◽  
Sahotra Sarkar ◽  
...  

Author(s):  
Gerardo Guzmán-Aguilar ◽  
Aglaen Carbajal-Navarro ◽  
Cuauhtémoc Sáenz-Romero ◽  
Yvonne Herrerías-Diego ◽  
Leonel López-Toledo ◽  
...  

2003 ◽  
Vol 17 (2) ◽  
pp. 367-379 ◽  
Author(s):  
Luis A. Bojorquez-Tapia ◽  
Lincoln P. Brower ◽  
Guillermo Castilleja ◽  
Salvador Sanchez-Colon ◽  
Mariano Hernandez ◽  
...  

2016 ◽  
Vol 38 ◽  
pp. 103-116 ◽  
Author(s):  
Teodoro Carlón Allende ◽  
Manuel E. Mendoza ◽  
Diego R. Pérez-Salicrup ◽  
José Villanueva-Díaz ◽  
Antonio Lara

2010 ◽  
Vol 33 (2) ◽  
pp. 175
Author(s):  
Ma. Luisa España-Boquera ◽  
Philippe Lobit ◽  
Vilma Castellanos-Morales

Chlorophyll is an essential element of photosynthesis and its content in plant leaves indicates their photosynthetic capacity as well as the presence of stress or diseases. The purpose of this work was to evaluate the feasibility of estimating chlorophyll content in the Monarch Butterfly Biosphere Reserve forest (Sierra Chincua sanctuary, México) based on vegetation indices calculated by using hyperspectral reflectance measurements of plant leaves. This study focused on oyamel (Abies religiosa L.) which is the main tree specie of this area. Leaf samples were taken on 140 trees and analyzed for chlorophyll a and b, nitrogen and carbon content. The hyperspectral reflectance spectra were measured on each sample and different vegetation indices were calculated. Results showed that the indices best correlated with chlorophyll content were the red edge position index (r = 0.531) and the red edge position chlorophyll reflectance index (r = 0.506), followed by the MERIS terrestrial chlorophyll index (r = 0.497) and the green chlorophyll reflectance index (r = 0.472). Although there was a significant correlation between nitrogen and chlorophyll content, none of the indices studied here correlated with nitrogen content. The influence of various environmental factors (altitude, slope, vegetation density and aspect) on leaf composition (nitrogen, carbon chlorophyll content and chlorophyll a/b ratio) and on the vegetation indices was studied. Environmental factors had an influence on both leaf composition and vegetation indices. Chlorophyll and nitrogen content were influenced mostly by the altitude and slope of the site while vegetation indices were affected mostly by its orientation.


2008 ◽  
Vol 13 (2) ◽  
pp. 229-243 ◽  
Author(s):  
ANTONIO KIDO ◽  
ANDREW SEIDL

ABSTRACTTourists, protected area managers, gateway communities, and national or international interested parties may have different objectives for protected areas management in developing countries. When values and incentives are at cross-purposes, difficulties in management may persist, but policy alternatives may be available. This research hopes to better understand the incentives facing different groups of stakeholders in the ecological-economic management of the Monarch Butterfly Biosphere Reserve in Michoacan, Mexico. The quasi-private management of this protected area by ‘ejidatarios’ provides an additional feature of interest. Travel cost, contingent behavior and export base analyses are used to establish alternative optimal entrance price strategies at the Reserve. Potential policy alternatives from the perspective of each stakeholder group are explored. Significant changes in management strategy, optimal entry fee and economic benefit appear to be possible by recognizing different scales and orientations of relevant stakeholders.


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