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Microbial metabolites such as balloon mycin and aminosugars are important sources of soil organic carbon pools and play an important role
in regulating the formation and stability of soil organic carbon.
Reforestation is an effective way to restore tropical degraded coastal terraces, and previous studies have found that the mixing of native tree species can significantly accelerate the restoration of soil biodiversity (Wuet al.
, 2021, Global Change Biology, 27, 5329-5340).
However, there is still a lack of direct comparison and quantitative assessment of the accumulation characteristics of different microbial metabolites and their relative contributions to soil organic carbon pools during the restoration process, and the relevant research will not only help improve the mechanism understanding of ecological function reconstruction in the restoration process, but also provide scientific and technological support
for regional ecological restoration practices and climate change response.
Based on the 60-year-old vegetation restoration sequence of Xiaoliang Tropical Coastal Ecosystem Positioning Research Station, the restoration ecology task team of South China Botanical Garden of the Chinese Academy of Sciences explored the accumulation characteristics of balloon mycin-related soil proteins and aminosugars and the contribution of soil organic carbon pool in the process of
vegetation restoration.
The results found that: (1) bare land afforestation greatly increased the accumulation of balloon mycin-related proteins and aminosugars in soil, but reduced their contribution to soil organic carbon pools; (2) The accumulation of balloon mycin-related proteins was faster than that of amino sugars during the restoration process, and the contribution to the soil organic carbon pool was greater, indicating that arbuscular mycorrhizal fungi played an important role in regulating soil carbon cycle during forest restoration, and the introduction of arbuscular mycorrhizal fungal plants could be used as an effective recovery strategy to promote soil organic carbon sequestration; (3) Soil carbon: The importance of phosphorus ratio in regulating the accumulation of microbial metabolites indicates that the regulation
of soil organic carbon sequestration and stability can be achieved through fertilization management in phosphorus-restricted ecosystems.
(4) The advantages of native tree species mixed forests in long-term adaptation to phosphorus restriction, phosphorus storage and phosphorus use efficiency lead to the rapid restoration of soil biodiversity while significantly improving soil carbon sequestration capacity, and the "functional mixing" of plants It can be used as the preferred strategy
for the coordinated restoration of degraded ecosystem structure and function.
The relevant research results have recently been published in
the international academic journal Global Change Biology.
Li Tengteng, a postdoctoral fellow at South China Botanical Garden, and Yuan Ye, a master's student, are the co-first authors of the paper, and researcher Liu Zhanfeng is the corresponding author
of the paper.
The research work has been supported by the National Key Research and Development Program of China, the National Natural Science Foundation of China and the core team project of the Guangdong Laboratory of Southern Marine Science and
Engineering (Guangzhou).
Links to papers: https://doi.
org/10.
1111/GCB.
16467
Figure 1.
Accumulation of microbial metabolites during tropical coastal forest restoration and their contribution
to soil organic carbon pools.
BL, bare ground; EP, eucalyptus artificial pure forest, MF, native tree species mixed forest, NF, natural forest
.
