Linkage of fine and coarse litter traits to soil microbial characteristics and nitrogen mineralization across topographic positions in a temperate natural forest
Linkage of fine and coarse litter traits to soil microbial characteristics and nitrogen mineralization across topographic positions in a temperate natural forest
复制标题
DOI：
10.1007/s11104-020-04759-y
复制
发表时间：
2020-11
期刊：
影响因子：
4.9
通讯作者：
Tomohiro Yokobe;F. Hyodo;R. Tateno;N. Tokuchi
中科院分区：
文献类型：
--
作者：
Tomohiro Yokobe;F. Hyodo;R. Tateno;N. Tokuchi
天然林内的地形位置可以显著影响凋落物性状、土壤微生物特征和氮（N）矿化，引起植物-土壤反馈。尽管有大量粗糙的垃圾（木质残体和粗根），大多数研究都集中在细凋落物和粗根之间的联系（叶和细根）和N动态和/或土壤微生物群落。方法我们调查了细和粗凋落物与土壤微生物生物量，群落结构，结果粗凋落物丰度和C/N比值增大，土壤微生物生物量降低，土壤微生物丰度、氮矿化潜力均表现为高位高于低位。在枯落物性状中，粗枯落物丰度和枯落物碳氮比是微生物生物量和真菌-细菌优势度的最佳预测因子，这可能是由于植物群落间气候胁迫的差异所致。微生物性状是最好的预测N矿化potential.ConclusionsFine凋落物性状和粗凋落物丰度可能与土壤微生物特性和N矿化在天然林与可变地形。
AimsTopographic positions within a natural forest can considerably influence litter traits, soil microbial characteristics, and nitrogen (N) mineralization, causing plant–soil feedbacks. Despite the high abundance of coarse litter (woody debris and coarse roots) in forest ecosystems, most studies have focused on linkages between fine litter (leaves and fine roots) and N dynamics and/or the soil microbial community.MethodsWe investigated the association of fine and coarse litter with soil microbial biomass, community structure, and N mineralization at upper and lower slope positions on sedimentary rocks in a temperate forest dominated byFagus crenata.ResultsGreater coarse litter abundance and litter C-to-N ratio, and lower soil microbial biomass, bacterial abundance, and N mineralization potential were found in upper positions than in lower positions. Among litter traits, coarse litter abundance and litter C-to-N ratio were the best predictors of the microbial biomass and fungal-to-bacterial dominance, possibly due to differences in climatic stress among plant communities. Microbial traits were the best predictors of N mineralization potential.ConclusionsFine litter traits and coarse litter abundance are likely linked to soil microbial characteristics and N mineralization in natural forests with variable topography.