Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2015.11.011 |
Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI | |
Creech, Tyler G.1; Epps, Clinton W.1; Monello, Ryan J.2,4; Wehausen, John D.3 | |
通讯作者 | Creech, Tyler G. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2016 |
卷号 | 127页码:160-170 |
英文摘要 | Diet quality influences ungulate population dynamics but is difficult to measure at fine temporal or spatial resolution using field-intensive methods such as fecal nitrogen (FN). Increasingly, the remotely sensed vegetation index NDVI is used to represent potential ungulate diet quality, but NDVI’s relationship with diet quality has yet to be examined for herbivores in desert environments. We evaluated how strongly NDVI was associated with diet quality of desert bighorn sheep (Ovis canadensis nelsoni) in the Mojave Desert using FN data from multiple years and populations. We considered effects of temporal resolution, geographic variability, and NDVI spatial summary statistic on the NDVI-diet quality relationship. NDVI was more reliably associated with diet quality over the entire growing season than with instantaneous diet quality for a population. NDVI was also positively associated with population genetic diversity, a proxy for long-term, population-level effects of diet quality. We conclude that NDVI is a useful diet quality indicator for Mojave Desert bighorn sheep and potentially other desert ungulates. However, it may not reliably track diet quality if NDVI data are too spatially coarse to detect microhabitats providing high-quality forage, or if diet is strongly influenced by forage items that are weakly correlated with landscape greenness. (C) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Bighorn sheep Fecal nitrogen Forage Mojave Desert |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000370893900018 |
WOS关键词 | DIFFERENCE VEGETATION INDEX ; DWELLING MOUNTAIN SHEEP ; MODIS-EVI DATA ; BIGHORN SHEEP ; FECAL NITROGEN ; FORAGE QUALITY ; CLIMATE ; PHENOLOGY ; METAPOPULATION ; CONSERVATION |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194094 |
作者单位 | 1.Oregon State Univ, Dept Fisheries & Wildlife, 104 Nash Hall, Corvallis, OR 97331 USA; 2.Natl Pk Serv, Biol Resource Management Div, 1201 Oak Ridge Dr, Ft Collins, CO 80525 USA; 3.Univ Calif, White Mt Res Ctr, 3000 E Line St, Bishop, CA 93514 USA; 4.Natl Pk Serv, Pacific Isl Network, Inventory & Monitoring Program, POB 52, Hawaii Natl Pk, HI 96718 USA |
推荐引用方式 GB/T 7714 | Creech, Tyler G.,Epps, Clinton W.,Monello, Ryan J.,et al. Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI[J],2016,127:160-170. |
APA | Creech, Tyler G.,Epps, Clinton W.,Monello, Ryan J.,&Wehausen, John D..(2016).Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI.JOURNAL OF ARID ENVIRONMENTS,127,160-170. |
MLA | Creech, Tyler G.,et al."Predicting diet quality and genetic diversity of a desert-adapted ungulate with NDVI".JOURNAL OF ARID ENVIRONMENTS 127(2016):160-170. |
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