How does grassland degradation affect soil enzyme activity and microbial nutrient limitation in saline‐alkaline meadow

Bibliographic Data

ID21649067
AuthorsJingjing Yang (0000-0003-1427-3117, State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment Northeast Normal University Changchun China), Xuefeng Wu (0000-0001-9257-0358, Chongqing Institute of Quality and Standardization Chongqing China), Hang Ruan (0000-0002-8736-1380, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Institute of Grassland Science Northeast Normal University Changchun China), Yueqing Song (Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Institute of Grassland Science Northeast Normal University Changchun China), Man Xu (0000-0003-1653-8510, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Institute of Grassland Science Northeast Normal University Changchun China), Shengnan Wang (0000-0002-2897-9260, Ecology and Biodiversity Group, Department of Biology Utrecht University Utrecht The Netherlands), Deli Wang (0000-0002-0708-8530, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Institute of Grassland Science Northeast Normal University Changchun China), Donghui Wu (0000-0001-8778-0107, State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment Northeast Normal University Changchun China, corresponding author)
Year2023
Volume34
Issue18
Pages5863-5875
Publication date2023-12-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.4883
OpenAlexW4386163300
LanguageEN
Citations received2
References cited76

Soil enzyme activity and its stoichiometry are excellent representatives of soil microorganisms' response to changing conditions, and act as a good indicator of microbial energy and nutrient demands. However, how soil enzyme activity and microbial nutrient limitation will be modified by grassland degradation is not well understood, especially in the saline‐alkaline meadow. Here, we presented how soil enzyme activity and microbial nutrient limitation shifted along a well‐characterized gradient of salinized degraded grasslands (non‐degraded, moderately degraded, and severely degraded). Our results showed soil enzyme activity was the highest in moderately degraded grasslands, which was mainly regulated by soil bacterial diversity. Soil microbial community metabolism in alkali‐saline meadow grasslands was limited by both carbon and phosphorus. Microbial carbon limitation showed a hump‐shaped pattern along the grassland degradation gradient, while microbial phosphorus limitation showed a gradually decreasing trend. Soil bacterial diversity is a key regulator of soil microbial carbon limitation, but the structure of the soil bacterial and plant community determines microbial phosphorus limitation. Taken together, our findings, taken together, provide evidence that soil bacteria are direct drivers of soil enzyme activity and microbial nutrient limitation along a grassland degradation gradient with salinization and suggest that these changes are regulated by soil salinity

Agronomy · Alkali soil · Bacteria · Biology · Grassland · Microbial population biology · Nutrient · Nutrient cycle · Phosphorus · Salinity · Soil biodiversity · Soil carbon · Soil organic matter · Soil pH · Soil retrogression and degradation · Soil salinity · Soil water · Chemistry · Environmental Science · Microbial Community Ecology and Physiology · Soil and Water Nutrient Dynamics · Soil Carbon and Nitrogen Dynamics · Ecology · Soil Science

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