Herbivory Effects on Ephedra spp. in the Chihuahuan Desert
Open Access
- 1 January 2020
- journal article
- Published by Scientific Research Publishing, Inc. in Open Journal of Ecology
- Vol. 10 (02), 37-44
- https://doi.org/10.4236/oje.2020.102003
Abstract
Two species of Ephedra: E. trifurca and E. torreyana inhabit shrub and grassland habitats in the northern Chihuahuan Desert. E. torreyana is limited to black grama grasslands where grasses are taller than the shrub. E. torreyana is heavily browsed by vertebrates and E. trifurca is browsed during some years. We established an experiment with cylindrical exclosures that excluded rabbits and rodents, rabbits but accessible to rodents, for comparison with E. torreyana plants available to all herbivores. Plants accessible to all vertebrate herbivores were significantly smaller with shorter stem lengths than plants in exclosures. We concluded that E. torreyana in black grama grassland are largely hidden from vertebrate herbivores and that intense herbivory reflects the degraded state of the study site which makes the E. torreyana evergreen shrubs apparent to vertebrates.Keywords
This publication has 10 references indexed in Scilit:
- Diversification in North American arid lands: Niche conservatism, divergence and expansion of habitat explain speciation in the genus EphedraMolecular Phylogenetics and Evolution, 2012
- Fire in Chihuahuan Desert grassland: Short-term effects on vegetation, small mammal populations, and faunal pedoturbationJournal of Arid Environments, 2009
- Evolution of seed dispersal in North American EphedraEvolutionary Ecology, 2009
- Diet of the brown hare (Lepus europaeus) and food availability in northern Patagonia (Mendoza, Argentina)Mammalian Biology - Zeitschrift fur Saugetierkunde, 2007
- Survey on Resources of Ephedra Plants in XinjiangBiological & Pharmaceutical Bulletin, 2005
- Mechanisms for the keystone status of kangaroo rats: graminivory rather than granivory?Oecologia, 1997
- Sex-biased herbivory in Ephedra trifurca: the importance of sex-by-environment interactionsOecologia, 1993
- Shasta ground sloth food habits, Rampart Cave, ArizonaPaleobiology, 1978
- Food, ingestion rates, and assimilation in the desert millipede Orthoporus ornatus (Girard) (Diplopoda)Oecologia, 1975
- Vegetational Changes on a Semidesert Grassland Range from 1858 to 1963Ecological Monographs, 1965