干旱区生态环境知识资源中心(Arid): Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America

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DOI	10.1016/j.ecolind.2020.106401
	Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
	Miranda, Alejandro; Lara, Antonio; Altamirano, Adison; Di Bella, Carlos; Gonzalez, Mauro E.; Julio Camarero, Jesus
通讯作者	Miranda, A
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	115
英文摘要	Deforestation is widely studied throughout the world. However, a less evident issue is the effect of climate change and drought on remnants of native forests. The objective of this work was to understand the geographic variations in resistance to drought of the Mediterranean sclerophyllous forests of central Chile. These forests have been historically reduced and fragmented and in recent years were subjected to the most prolonged drought occurred between 2010 and 2017. Using data from the MODIS satellite sensor, temporal trends in the NDVI (Normalized Difference Vegetation Index) were quantified. We related these trends with different environmental variables to understand the effects of geographical variation and forest type as indicators of resistance to drought. We observed a significant direct effect of drought, attributable to the reduced precipitation in central Chile, and a significantly reduced NDVI in near one-third of the region forests (browning). However, NDVI and therefore forest productivity were more stable in some mesic sites such as ravine bottoms, but not on south-facing slopes. This suggests that under a regime of reduced precipitations, a greater available soil humidity would be a more important factor than the fact of receiving less solar radiation. Finally, the highest degree of browning was observed in semi-arid sclerophyllous forest dominated by species tolerant to drought. Our findings emphasize the need to consider topographic site conditions to adequately assess forest productivity and vulnerability where local wet conditions could provide drought refuges. This recent drought may be analogous to forecasted warmer and drier climate conditions with more frequent and severe droughts, so our results may serve as a general framework for climate-smart decisions in highly threatened forest restoration and conservation.
英文关键词	Climate change Resilience Resistance Remote sensing Chile NDVI
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000561438700016
WOS关键词	GLOBAL BIODIVERSITY ; TROPICAL FORESTS ; CENTRAL CHILE ; LAND-USE ; VEGETATION ; CLIMATE ; NDVI ; SCENARIOS ; DECLINE ; REGENERATION
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325746
作者单位	[Miranda, Alejandro; Altamirano, Adison] Univ La Frontera, Dept Ciencias Forestales, Lab Ecol Paisaje & Conservac, POB 54-D, Temuco, Chile; [Miranda, Alejandro] Univ Austral Chile, Fac Ciencias Forestales & Recursos Nat, Escuela Graduados, Valdivia, Chile; [Miranda, Alejandro; Lara, Antonio; Gonzalez, Mauro E.] Univ Chile, Ctr Climate & Resilience Res CR2, Santiago, Chile; [Lara, Antonio; Gonzalez, Mauro E.] Univ Austral Chile, Fac Ciencias Forestales & Recursos Nat, Inst Conservac Biodiversidad & Terr, Valdivia, Chile; [Altamirano, Adison] Univ La Frontera, Fac Ciencias Agr & Forestales, Butamallin Res Ctr Global Change, Temuco, Chile; [Di Bella, Carlos] Inst Nacl Tecnol Agr CIRN INTA Castelar, Inst Clima & Agua, Hurlingham, Buenos Aires, Argentina; [Di Bella, Carlos] Univ Buenos Aires, Fac Agron, Dept Metodos Cuantitat, Buenos Aires, DF, Argentina; [Julio Camarero, Jesus] CSIC, Inst Pirenaico Ecol IPE, Zaragoza, Spain
推荐引用方式 GB/T 7714	Miranda, Alejandro,Lara, Antonio,Altamirano, Adison,et al. Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America[J],2020,115.
APA	Miranda, Alejandro,Lara, Antonio,Altamirano, Adison,Di Bella, Carlos,Gonzalez, Mauro E.,&Julio Camarero, Jesus.(2020).Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America.ECOLOGICAL INDICATORS,115.
MLA	Miranda, Alejandro,et al."Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America".ECOLOGICAL INDICATORS 115(2020).