Bacteria life-history strategies and the linkage of soil C-N-P stoichiometry to microbial resource limitation differed in karst and non-karst plantation forests in southwest China
Tao Yang , Haoran Zhang , Chenghao Zheng , Xuejing Wu , Yutong Zhao , Xinyang Li , Haizhu Liu , Liang Dong , Zichun Lu , Jinxing Zhou , Xiawei Peng
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引用次数: 0
Abstract
Soil microbial resource-acquisition strategies play a crucial role in soil nutrient cycling and the accumulation of soil organic carbon (SOC) in vegetation restoration. Despite the growing interest in soil microbial resource limitation, the impact of lithology on microbial resource limitation and its relationship with soil carbon–nitrogen-phosphorus (C-N-P) stoichiometry is not well understood. Therefore, we investigated the soil C-N-P and ecoenzymatic stoichiometry, bacterial life-history strategies, and microbial resource limitation in two common plantation forests (Pinus yunnanensis Franch. (PY) and Eucalyptus maideni F. Muell. (EM)) in karst and non-karst areas in southwest China. These areas are characterized by soils derived from limestone and clastic rock, respectively. The results showed that (1) soil nutrients, SOC concentrations and ecoenzymatic activities were significantly higher in karst plantation forests compared to non-karst, except for dissolved inorganic phosphorus; (2) soil microorganisms in both lithology were largely co-limited by C and P in EM plantation while the PY plantation soil in organic horizon primarily limited by P, which might be due to a much higher ratio of soil C:P and N:P; (3) lithology affects the associations between soil C-N-P stoichiometry and microbial resource limitation; (4) redundancy analysis showed that the ratio of C:N acquiring enzyme was a substantially predictor for microbial resource limitation in both karst and non-karst soils; (5) karst soils had a higher proportion of species affiliated with oligotrophs bacteria. Overall, these findings improve our knowledge of microbial resource limitation over limestone and clastic rock and its relationship with soil C-N-P and ecoenzymatic stoichiometry, as well as the lithology effects on bacteria life-history strategies.
期刊介绍:
Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment.
Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.