气候变化领域集成服务门户(CCPortal): Postfire recruitment failure in Scots pine forests of southern Siberia

CCPortal

DOI	10.1016/j.rse.2019.111539
	Postfire recruitment failure in Scots pine forests of southern Siberia
	Barrett K.; Baxter R.; Kukavskaya E.; Balzter H.; Shvetsov E.; Buryak L.
发表日期	2020
ISSN	00344257
卷号	237
英文摘要	Wildfire disturbances effect changes in vegetation communities that in turn influence climate. Such changes in boreal forest ecosystems can persist over decadal time scales or longer. In the ecotone between boreal forest and steppe in the region southeast of Lake Baikal in southern Siberia, shifts between the two vegetation types may be precipitated by variations in site specific conditions, as well as disturbance characteristics such as fire frequency and severity. Warmer, drier conditions in the region have been associated with a decrease in fire return intervals and greater burn severity that may, in turn, drive conversion of forests to steppe vegetation at a greater rate than has occurred prior to the onset of warming and drying. Stand-replacing fires in Pinus sylvestris stands in southern Siberia may lead to recruitment failure postfire, particularly on southwest to west-facing slopes, which are more often dominated by grasses. This study uses a combination of field data and remotely sensed indices of vegetation and moisture to distinguish between recruitment pathways in southern Siberia, and to study the influence of factors related to soils, topography, fire severity and winter snow cover on these. We expected that recruitment success would be associated with lower burn severity (higher NBR), higher greenness (NDVI) and moisture (NDMI), and winter snow (NDSI) postfire. We also expected phenological characteristics to differ among recruitment paths. Prior to burning, our sites are broadly similar in terms of remotely sensed indices of moisture (NDMI), vegetation (NDVI), and winter fractional snow cover (NDSI), but recruitment failure sites are generally drier and less green postfire. Initial differences in greenness and moisture among sites characterized by abundant recruitment (AR), intermediate recruitment (IR) and recruitment failure (RF) become more pronounced over the initial decades postfire. The earliest separability of AR and RF sites using remotely sensed indices occurs in the winter months 3–4 years postfire, during which time NDSI is highest for AR sites and lowest for RF. Although seasonality was important with regard to distinguishing among AR, IR and RF index values, the timing of phenological events such as start and end of season did not differ significantly among the sites. © 2019 The Authors
语种	英语
scopus关键词	Digital storage; Ecosystems; Fires; Lakes; Moisture; Remote sensing; Snow; Topography; Vegetation; Boreal forest ecosystems; Fire return intervals; Fractional snow covers; Remotely sensed indices; Scots pine forest; Stand-replacing fires; Steppe vegetation; Vegetation community; Forestry; boreal forest; coniferous forest; ecotone; environmental disturbance; forest ecosystem; forest fire; forest-steppe; plant community; vegetation type; wildfire; Lake Baikal; Russian Federation; Siberia; Pinus sylvestris; Poaceae
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179502
作者单位	Centre for Landscape and Climate Research, School of Geography, Geology and Environment, University of Leicester, University RoadLE1 7RH, United Kingdom; Leicester Institute for Space and Earth Observation, University of Leicester, University RoadLE1 7RH, United Kingdom; Department of Biosciences, University of Durham, South Road, Durham, DH1 3LE, United Kingdom; V.N. Sukachev Institute of Forest of the Siberian Branch of the Russian Academy of Sciences, Separate Subdivision of the FRC KSC SB RAS 660036 Russia, 50/28 Akademgorodok, Krasnoyarsk, Russian Federation; The Branch of FBU VNIILM “Center of Forest Pyrology”, 42 Krupskaya, Krasnoyarsk, 660062, Russian Federation
推荐引用方式 GB/T 7714	Barrett K.,Baxter R.,Kukavskaya E.,et al. Postfire recruitment failure in Scots pine forests of southern Siberia[J],2020,237.
APA	Barrett K.,Baxter R.,Kukavskaya E.,Balzter H.,Shvetsov E.,&Buryak L..(2020).Postfire recruitment failure in Scots pine forests of southern Siberia.Remote Sensing of Environment,237.
MLA	Barrett K.,et al."Postfire recruitment failure in Scots pine forests of southern Siberia".Remote Sensing of Environment 237(2020).