Dung application increases CH<Subscript>4</Subscript> production potential and alters the composition and abundance of methanogen community in restored peatland soils from Europe

Peatland restoration via rewetting aims to recover biological communities and biogeochemical processes typical to pristine peatlands. While rewetting promotes recovery of C accumulation favorable for climate mitigation, it also promotes methane (CH₄) emissions. The potential for exceptionally high emissions after rewetting has been measured for Central European peatland sites previously grazed by cattle. We addressed the hypothesis that these exceptionally high CH₄ emissions result from the previous land use. We analyzed the effects of cattle dung application to peat soils in a short- (2 weeks), a medium- (1 year) and a long-term (grazing) approach. We measured the CH₄ production potentials, determined the numbers of methanogens by mcrA qPCR, and analyzed the methanogen community by mcrA T-RFLP-cloning-sequencing. Dung application significantly increased the CH₄ production potential in the short- and the medium-term approach and non-significantly at the cattle-grazed site. The number of methanogens correlated with the CH₄ production in the short- and the long-term approach. At all three time horizons, we found a shift in methanogen community due to dung application and a transfer of rumen methanogen sequences (Methanobrevibacter spp.) to the peatland soil that seemed related to increased CH₄ production potential. Our findings indicate that cattle grazing of drained peatlands changes their methanogenic microbial community, may introduce rumen-associated methanogens and leads to increased CH₄ production. Consequently, rewetting of previously cattle-grazed peatlands has the potential to lead to increased CH₄ emissions. Careful consideration of land use history is crucial for successful climate mitigation with peatland rewetting.     

赴黑龙江省检查秋季森林防火工作情况报告

根据国家森林防火指挥部领导的指示要求，国家林业局防火办组成了由国家森防指专家组成员、森林防火专业委员会主任朴东赫带队的秋防工作检查组，于2007年10月12日～19日赶赴黑龙江省，对当地秋季森林防火工作进行了检查调研。检查期间，工作组主要采取实地检查、抽查、座谈了解、听取汇报等方式，重点检查了哈尔滨、佳木斯、鹤岗三个地市辖区内的地方林业局、省森工总局林管局、     

国家林业局工作组赴吉林、黑龙江检查森林防火工作情况的报告

2007年5月13~23日,在全国政协委员、国家森林防火指挥部森林防火专家组组长、国家林业局原副局长马福同志带领下,我们一行4人对吉林和黑龙江省2007年春季森林防火工作进行了检查调研。在检查过程中,针对当前森林防火形势、防     

赴美森林火灾扑救指挥系统培训考察报告

2008年5月12日-5月24日,由美国路易斯安那州立大学教授Sun Joseph Chang博士陪同,南京森林公安高等专科学校948项目赴美国培训考察团一行三人在美国加州学习和考察了森林火灾扑救指挥系统(ICS)及其培训体系,并观摩了ICS实