文章基本信息

标题：Mule deer forage availability and quality at the Chihuahuan Desert rangelands, Mexico after a severe 3-year drought
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作者：Martha P. Olivas-Sánchez ; Cuauhcihuatl Vital-García ; Juan P. Flores-Margez 等
期刊名称：Cogent Biology
电子版ISSN：2331-2025
出版年度：2018
卷号：4
期号：1
页码：1-14
DOI：10.1080/23312025.2018.1536315
出版社：Taylor and Francis Ltd
摘要：Mule deer historic range in Mexico has declined dramatically in the last decade. Forage availability and quality at the Chihuahuan Desert may play an important role sustaining populations at the southern end of their current distribution. We evaluated forage availability and quality at the end of a 3-year drought at two different localities in the Chihuahuan Desert: Old Net and Pulpit, we measured plant availability and quality, diet content and calculated diet preference indices. Vegetation at Old Net consisted primarily of both succulents (47%) and trees-shrubs (42%) while Pulpit had more grasses (60%) and herbs (24%) (P < 0.005). Feces collected at the Pulpit presented a high proportion of herbs (44%), while those collected at Old Net contained more trees and shrubs (53%). Preference index suggests that mule deer prefer herbs and overlook grasses, but there is no strong selection for any particular plant. Our results suggest that forage is appropriate to sustain mule deer populations, however, we found considerable variation in both localities suggesting a patchy landscape. More information regarding forage nutritional status and diet preferences can enhance our understanding on mule deer population dynamics in the Chihuahuan Desert..
关键词：mule deer; Chihuahuan Desert; forage quality; vegetation structure