Rapid recovery of soil bacterial communities after wildfire in a Chinese boreal forest.
Fires affect hundreds of millions of hectares annually. Above-ground community composition and diversity after fire have been studied extensively, but effects of fire on soil bacterial communities remain largely unexamined despite the central role of bacteria in ecosystem recovery and functioning. We investigated responses of bacterial community to forest fire in the Greater Khingan Mountains, China, using tagged pyrosequencing. Fire altered soil bacterial community composition substantially and high-intensity fire significantly decreased bacterial diversity 1-year-after-burn site. Bacterial community composition and diversity returned to similar levels as observed in controls (no fire) after 11 years. The understory vegetation community typically takes 20-100 years to reach pre-fire states in boreal forest, so our results suggest that soil bacteria could recover much faster than plant communities. Finally, soil bacterial community composition significantly co-varied with soil pH, moisture content, NH4(+) content and carbon/nitrogen ratio (P < 0.05 in all cases) in wildfire-perturbed soils, suggesting that fire could indirectly affect bacterial communities by altering soil edaphic properties.
1] State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China [2] University of the Chinese Academy of Sciences, Beijing 100049, China [3].
Xingjia
X
Xiang
1] State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China [2] University of the Chinese Academy of Sciences, Beijing 100049, China [3].
Yu
Y
Shi
State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Wenhua Road 72, Shenyang 110164, China.
Jian
J
Yang
1] State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Wenhua Road 72, Shenyang 110164, China [2] University of the Chinese Academy of Sciences, Beijing 100049, China.
Jianjian
J
Kong
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China.
Xiangui
X
Lin
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China.
Huayong
H
Zhang
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China.
Jun
J
Zeng
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, East Beijing Road 71, Nanjing 210008, China.
Haiyan
H
Chu
D001419:Bacteria / Q000145:classification* / Q000235:genetics*; D044822:Biodiversity; D018533:Biomass; D002244:Carbon / Q000378:metabolism; D002681:China; D004269:DNA, Bacterial / Q000235:genetics; D005390:Fires; D009584:Nitrogen / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012988:Soil Microbiology
D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D002244:Carbon; D009584:Nitrogen