Arid
DOI10.1890/11-1479.1
Ecosystem greenspots: identifying potential drought, fire, and climate-change micro-refuges
Mackey, Brendan; Berry, Sandra; Hugh, Sonia; Ferrier, Simon; Harwood, Thomas D.; Williams, Kristen J.
通讯作者Mackey, Brendan
来源期刊ECOLOGICAL APPLICATIONS
ISSN1051-0761
EISSN1939-5582
出版年2012
卷号22期号:6页码:1852-1864
英文摘要

In response to climate change and other threatening processes there is renewed interest in the role of refugia and refuges. In bioregions that experience drought and fire, micro-refuges can play a vital role in ensuring the persistence of species. We develop and apply an approach to identifying potential micro-refuges based on a time series of remotely sensed vegetation greenness (fraction of photosynthetically active radiation intercepted by the sunlit canopy; fPAR). The primary data for this analysis were NASA MODIS 16-day L3 Global 250 m (MOD13Q1) satellite imagery. This method draws upon relevant ecological theory (source sink habitats, habitat templet) to calculate a micro-refuge index, which is analyzed for each of the major vegetation ecosystems in the case-study region (the Great Eastern Ranges of New South Wales, Australia). Potential ecosystem greenspots were identified, at a range of thresholds, based on an index derived from: the mean and coefficient of variance (COV) of fPAR over the 10-year time series; the minimum mean annual (PAR; and the COV of the 12 values of mean monthly fPAR. These greenspots were mapped and compared with (1) an index of vascular plant species composition, (2) environmental variables, and (3) protected areas. Potential micro-refuges were found within all vegetation ecosystem types. The total area of ecosystem greenspots within the upper 25% threshold was 48 406 ha; around 0.2% of the total area of native vegetation (23.9 x 10(6) ha) in the study region. The total area affected by fire was 3.4 x 10(6) ha. The results of the environmental diagnostic analysis suggest deterministic controls on the geographical distribution of potential micro-refuges that may continue to function under climate change. The approach is relevant to other regions of the world where the role of micro-refuges in the persistence of species is recognized, including across the world’s arid zones and, in particular, for the Australian, southern African, and South American continents. Micro-refuge networks may play an important role in maintaining beta-diversity at the bio-region scale and contribute to the stability, resilience, and adaptive capacity of ecosystems in the face of ever-growing pressures from human-forced climate change, land use, and other threatening processes.


英文关键词climate change drought ecosystem adaptive capacity ecosystem greenspots fire Great Eastern Range, New South Wales, Australia habitat productivity MODIS micro-refuges refugia
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000309437100013
WOS关键词BOX-IRONBARK ECOSYSTEM ; DRY FOREST LANDSCAPES ; CONSERVATION VALUE ; MESIC GULLIES ; PATTERNS ; HABITAT ; BIODIVERSITY ; STRATEGIES ; FRAMEWORK ; TEMPLET
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/172017
作者单位Australian Natl Univ, Fenner Sch Environm & Soc, Canberra, ACT 0200, Australia
推荐引用方式
GB/T 7714
Mackey, Brendan,Berry, Sandra,Hugh, Sonia,et al. Ecosystem greenspots: identifying potential drought, fire, and climate-change micro-refuges[J]. Arizona State University,2012,22(6):1852-1864.
APA Mackey, Brendan,Berry, Sandra,Hugh, Sonia,Ferrier, Simon,Harwood, Thomas D.,&Williams, Kristen J..(2012).Ecosystem greenspots: identifying potential drought, fire, and climate-change micro-refuges.ECOLOGICAL APPLICATIONS,22(6),1852-1864.
MLA Mackey, Brendan,et al."Ecosystem greenspots: identifying potential drought, fire, and climate-change micro-refuges".ECOLOGICAL APPLICATIONS 22.6(2012):1852-1864.
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