Orumaa Argo, Agan Ahto, Anslan Sten, Drenkhan Tiia, Drenkhan Rein, Kauer Karin, Köster Kajar, Tedersoo Leho, Metslaid Marek
Institute of Forestry and Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia.
Institute of Forestry and Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, 51006 Tartu, Estonia; Institute of Ecology and Earth Sciences, University of Tartu, Ravila 14a, 50411 Tartu, Estonia.
Sci Total Environ. 2022 Dec 10;851(Pt 1):158173. doi: 10.1016/j.scitotenv.2022.158173. Epub 2022 Aug 18.
We studied long-term effects of forest fires on the dynamics of soil fungal community along a post-fire chronosequence in hemiboreal Scots pine stands in north-western Estonia. Effects of fire on soil and fungi were studied on six sites that differed in time since fire (10, 21, 36, 67, 78 and 181 years ago), without further management interventions. Soil fungal communities along the chronosequence were dominated by soil saprotrophs and ectomycorrhizal (EcM) fungi. Across the chronosequence, the most dominant phylum was Ascomycota. The most abundant OTUs were identified as Umbelopsis sp., Hyaloscyphaceae sp. and Pezoloma ericae with relative abundances of 9.5, 8.9 and 6.8 %, respectively. Fungal species richness was similar among sample areas except in the area where fire occurred 36 years ago, where it was significantly lower. There were considerable differences in EcM fungal species composition along the chronosequence. The most recently burned site had Piloderma sphaerosporum, Pseudotomentella sp. and Clavulinaceae sp. as most abundant EcM OTUs while in three oldest burned areas Clavulinaceae sp. and Cortinarius sp. were abundant. Soil C and N stocks were lower in the most recently burned area but differences with other areas were not statistically significant. Soil pH had a significant effect on fungal species composition. Older areas had substantially lower pH compared to more recently burned areas.
我们研究了森林火灾对爱沙尼亚西北部半北方苏格兰松林火灾后时间序列上土壤真菌群落动态的长期影响。在六个火灾发生时间不同（分别为10、21、36、67、78和181年前）且无进一步管理干预的地点，研究了火灾对土壤和真菌的影响。时间序列上的土壤真菌群落以土壤腐生菌和外生菌根（EcM）真菌为主。在整个时间序列中，最主要的门是子囊菌门。最丰富的操作分类单元（OTU）分别被鉴定为伞状霉属、透明盘菌科和埃里克盘菌，相对丰度分别为9.5%、8.9%和6.8%。除了36年前发生火灾的区域真菌物种丰富度显著较低外，各采样区域的真菌物种丰富度相似。沿时间序列外生菌根真菌的物种组成存在相当大的差异。最近发生火灾的地点，最丰富的外生菌根OTU是球形皮盘菌、假丝膜菌属和珊瑚菌科，而在三个最古老的火灾区域，珊瑚菌科和丝膜菌属丰富。最近发生火灾的区域土壤碳和氮储量较低，但与其他区域的差异无统计学意义。土壤pH值对真菌物种组成有显著影响。与最近发生火灾的区域相比，较古老的区域土壤pH值显著较低。
