Holocene changes in fire frequency in the Daihai Lake region (north-central China): indications and implications for an important role of human activity

2013 ◽  
Vol 59 ◽  
pp. 18-29 ◽  
Author(s):  
Xu Wang ◽  
Jule Xiao ◽  
Linlin Cui ◽  
Zhongli Ding
2004 ◽  
Vol 23 (14-15) ◽  
pp. 1669-1679 ◽  
Author(s):  
Jule Xiao ◽  
Qinghai Xu ◽  
Toshio Nakamura ◽  
Xiaolan Yang ◽  
Wendong Liang ◽  
...  

2019 ◽  
Author(s):  
Chenliang Wu ◽  
◽  
Yuliang Duan ◽  
Trevor Cole ◽  
Jeffrey A. Nittrouer ◽  
...  

2021 ◽  
Vol 260 ◽  
pp. 106927
Author(s):  
Linlin Gao ◽  
Yang Deng ◽  
Xiaoya Yan ◽  
Qian Li ◽  
Yu Zhang ◽  
...  
Keyword(s):  

2020 ◽  
Vol 43 (4) ◽  
pp. 126089 ◽  
Author(s):  
Junjie Zhang ◽  
Shanshan Peng ◽  
Yimin Shang ◽  
Brigitte Brunel ◽  
Shuo Li ◽  
...  

2014 ◽  
Vol 23 (2) ◽  
pp. 234 ◽  
Author(s):  
Ellis Q. Margolis

Piñon–juniper (PJ) fire regimes are generally characterised as infrequent high-severity. However, PJ ecosystems vary across a large geographic and bio-climatic range and little is known about one of the principal PJ functional types, PJ savannas. It is logical that (1) grass in PJ savannas could support frequent, low-severity fire and (2) exclusion of frequent fire could explain increased tree density in PJ savannas. To assess these hypotheses I used dendroecological methods to reconstruct fire history and forest structure in a PJ-dominated savanna. Evidence of high-severity fire was not observed. From 112 fire-scarred trees I reconstructed 87 fire years (1547–1899). Mean fire interval was 7.8 years for fires recorded at ≥2 sites. Tree establishment was negatively correlated with fire frequency (r=–0.74) and peak PJ establishment was synchronous with dry (unfavourable) conditions and a regime shift (decline) in fire frequency in the late 1800s. The collapse of the grass-fuelled, frequent, surface fire regime in this PJ savanna was likely the primary driver of current high tree density (mean=881treesha–1) that is >600% of the historical estimate. Variability in bio-climatic conditions likely drive variability in fire regimes across the wide range of PJ ecosystems.


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