论文题目:

Dynamic changes in microbial communities and nutrient stoichiometry associated with soil aggregate structure in restored wetlands

英文论文题目:

Dynamic changes in microbial communities and nutrient stoichiometry associated with soil aggregate structure in restored wetlands

第一作者:

崔虎

英文第一作者:

H. Cui

联系作者:

王莉霞

英文联系作者:

L. X. Wang

发表年度:

2021

卷:

197

摘要:

Available information on interaction mechanisms between soil nutrient stoichiometry and microbial communities associated with soil aggregate structure in restored wetlands remains limited. As such, this study investigated water-stable aggregate structure using wet-sieving method and scanning electron microscope (SEM) in restored wetlands with a restoration duration of 0, 1, 2, 3, 5, 13 or 19 years, and their internal nutrient stoichiometry and microbial communities (phospholipid fatty acid analysis, PLFAs). The results showed that soil aggregate structure tended to be stable from the fifth restoration year. In the restored wetlands, General bacteria, Gram-positive bacteria (G(+)), and Gram-negative bacteria (G(-)) were the dominant components of soil microorganisms, which tented to condense in coarse-aggregates. The carbon-to-phosphorus (C:P) and nitrogen-to-phosphorus (N:P) ratios were higher in coarse-aggregates since C and N benefit from the physical protection. Redundancy analysis (RDA) results indicated that C:N ratio was primary environmental factors controlling the distribution of soil microbial communities. In the Sanjiang Plain, the soil organic carbon (SOC) decomposition was lower, and N was the primary nutrient limiting wetland restoration quality.

英文摘要:

Available information on interaction mechanisms between soil nutrient stoichiometry and microbial communities associated with soil aggregate structure in restored wetlands remains limited. As such, this study investigated water-stable aggregate structure using wet-sieving method and scanning electron microscope (SEM) in restored wetlands with a restoration duration of 0, 1, 2, 3, 5, 13 or 19 years, and their internal nutrient stoichiometry and microbial communities (phospholipid fatty acid analysis, PLFAs). The results showed that soil aggregate structure tended to be stable from the fifth restoration year. In the restored wetlands, General bacteria, Gram-positive bacteria (G(+)), and Gram-negative bacteria (G(-)) were the dominant components of soil microorganisms, which tented to condense in coarse-aggregates. The carbon-to-phosphorus (C:P) and nitrogen-to-phosphorus (N:P) ratios were higher in coarse-aggregates since C and N benefit from the physical protection. Redundancy analysis (RDA) results indicated that C:N ratio was primary environmental factors controlling the distribution of soil microbial communities. In the Sanjiang Plain, the soil organic carbon (SOC) decomposition was lower, and N was the primary nutrient limiting wetland restoration quality.

刊物名称:

Catena

英文刊物名称:

Catena

参与作者:

H. Cui, Y. Ou, L. X. Wang, A. Z. Liang, B. X. Yan and Y. X. Li

英文参与作者:

H. Cui, Y. Ou, L. X. Wang, A. Z. Liang, B. X. Yan and Y. X. Li