Soil phosphorus dynamics and its correlation with ectomycorrhizal fungi following forest conversion in subtropical conifer (Picea asperata) forests

IF 3.7 2区 农林科学 Q1 ECOLOGY
Lixia Wang , Shiyu Song , Huichao Li , Yang Liu , Lin Xu , Han Li , Chengming You , Sining Liu , Hongwei Xu , Bo Tan , Zhenfeng Xu , Li Zhang , Hans Lambers , Douglas Godbold
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引用次数: 0

Abstract

Ectomycorrhizal (ECM) fungi or their associated microbes play key roles in mobilizing phosphorus (P) from soil organic matter. Forest conversion often alters soil P availability. However, the correlation between P dynamics caused by forest conversion and changes in ECM fungi is not clear. To dress this issue, we create ECM-reduction (trenched) and ECM-intact (untrenched) conditions in the natural forest and plantation. We then measured soil microbial properties, fungal communities, and P fractions. Our results showed that the natural forest exhibited a higher proportion of inorganic phosphorus (Pi) and a lower proportion of organic phosphorus (Po) compared to the plantation, indicating that forest conversion resulted in a decrease in P mineralization. Under ECM-reduction conditions, resin-Pi contents increased in both forest types. ECM-reduction led to an increase in NaOH-Pi and a decrease in NaOH-Po in both forest types. However, ECM-reduction decreased the 1 M HCl-Pi content in the natural forest while increasing it in the plantation. Structural equation modeling revealed that in the natural forest, trenching directly affected the reads number of ECM fungi, which subsequently influenced 1 M HCl-Pi and resin-Pi contents. In the plantation, trenching impacted NaOH-Po and ECM reads number, which were associated with changes in residual-P and resin-Pi contents. These findings highlight that ECM fungi differ in their utilization of resin-Pi and their ability to mobilize primary mineral Pi (1 M HCl-Pi) and poorly-available P, depending on the soil quality of natural forests and plantations.
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来源期刊
European Journal of Soil Biology
European Journal of Soil Biology 环境科学-生态学
CiteScore
6.90
自引率
0.00%
发文量
51
审稿时长
27 days
期刊介绍: The European Journal of Soil Biology covers all aspects of soil biology which deal with microbial and faunal ecology and activity in soils, as well as natural ecosystems or biomes connected to ecological interests: biodiversity, biological conservation, adaptation, impact of global changes on soil biodiversity and ecosystem functioning and effects and fate of pollutants as influenced by soil organisms. Different levels in ecosystem structure are taken into account: individuals, populations, communities and ecosystems themselves. At each level, different disciplinary approaches are welcomed: molecular biology, genetics, ecophysiology, ecology, biogeography and landscape ecology.
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