Article
Environmental Sciences
Shuai Zhang, Junjie Lin, Peng Wang, Biao Zhu
Summary: Global climate change is expected to increase the frequency of drought and heavy precipitation, leading to more frequent drying-rewetting cycles in soils. The effects of these cycles on soil organic carbon (SOC) decomposition and the subsequent legacy effect on different SOC pools are still unclear.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Soil Science
Zezhou Zhang, Dongmei Wang, Mengxun Li
Summary: This study investigated the effects of frequent drying-rewetting cycles on soil respiration, aggregate stability, and nutrient availability. The results showed that a higher number of drying-rewetting cycles decreased soil aggregate stability, while a drying period exceeding 12 days promoted stability. The study also found that drying-rewetting cycles promoted soil nitrification, with a stronger effect observed with increasing cycle frequency. The availability of phosphorus was minimally affected by the drying-rewetting cycles, while the availability of potassium decreased with increasing cycle frequency.
Article
Soil Science
Xiankun Li, Ainara Leizeaga, Johannes Rousk, Gustaf Hugelius, Stefano Manzoni
Summary: Soil microbes perceive drying and rewetting events differently based on previous soil moisture history. The severity of the event determines the microbial growth response, with 'type 1' response being rapid and 'type 2' response being delayed. This study characterizes the perceived harshness between these two responses and identifies the pedoclimatic drivers that contribute to it, such as soil moisture and pH levels. The findings highlight the impact of these factors on carbon partitioning and microbial community adaptation to drying and rewetting events.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Ecology
Luhong Zhou, Shangshi Liu, Yaning Gu, Linfang Wu, Hang-Wei Hu, Ji-Zheng He
Summary: The impact of fire on above-ground biomass has significant consequences on soil carbon dynamics. The study conducted a global meta-analysis to determine the extent to which fire influenced soil respiration. The findings reveal that fires reduce soil respiration and its components, but the negative effects diminish over time. Fire severity, season, type, climate zones, and biomes moderate the influences of fire on soil respiration.
FUNCTIONAL ECOLOGY
(2023)
Article
Forestry
Xiankai Lu, Qinggong Mao, Zhuohang Wang, Taiki Mori, Jiangming Mo, Fanglong Su, Zongqing Pang
Summary: Anthropogenic elevated nitrogen deposition accelerates terrestrial nitrogen cycles and influences soil carbon dynamics. Long-term high nitrogen deposition in tropical forests decreases soil carbon mineralization rates, primarily due to reduced microbial biomass and altered microbial functions caused by soil acidification and potential phosphorus limitation. Increased nitrogen deposition also leads to higher levels of soil dissolved organic carbon, with a negative relationship between microbial biomass and soil DOC, suggesting decreased microbial consumption of soil-soluble carbon pools. Overall, long-term nitrogen deposition can enhance soil carbon stability and benefit carbon sequestration in nitrogen-rich tropical forests.
Article
Soil Science
Kehinde O. Erinle, Petra Marschner
Summary: The study focused on the impact of rapid rewetting and slow rewetting of dry soil on soil respiration and nutrient cycling. Results showed that slow rewetting can increase the flush of respiration, but only if the second partial rewetting occurs 6 hours after the first.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Agriculture, Multidisciplinary
Pengfei Zheng, Dandan Wang, Xinxiao Yu, Guodong Jia, Ziqiang Liu, Yusong Wang, Yonge Zhang
Summary: The return of farmland to forest and grassland effectively controls soil erosion and increases soil organic carbon reserves. The study found that drought significantly decreased soil respiration carbon emissions, while rainfall significantly increased them. Soil respiration responses to climate warming and drought varied, with soil moisture playing a key role.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2021)
Article
Soil Science
Ainara Leizeaga, Annelein Meisner, Johannes Rousk, Erland Baath
Summary: Our study found that exposure to repeated DRW cycles shifted bacterial growth response from type 2 to type 1 pattern, accelerating the recovery rate; soils with initial type 1 response tended to recover faster after each subsequent DRW cycle; repeated DRW cycles shaped the bacterial response to future DRW cycles, possibly mediated by a shift in species composition, physiological adjustment, evolutionary changes, or a combination of the three.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Soil Science
Matthew Leeford, Manpreet Singh Mavi, Daniel Liptzin, Steven J. Hall
Summary: This study examined the impact of different soil drying temperatures on water-extractable organic carbon (WEOC) and soil CO2 emissions after rewetting. The results showed that the drying temperature had a nonlinear effect on WEOC and CO2 emissions, and the response varied among soil samples and vegetation types. Therefore, soil health assessments conducted with different drying temperatures may not be directly comparable, and drying at lower temperatures may be preferable to avoid increasing carbon availability.
Review
Soil Science
Wenlong Gao, Changhua Fan, Wen Zhang, Ning Li, Huiran Liu, Miao Chen
Summary: In this review, the mechanisms and modulations of microbial-driven heterotrophic nitrification of organic nitrogen (O-HORG) in soil are discussed. Various factors such as pH, carbon and nitrogen contents can affect the occurrence and pathways of O-HORG. It is important to understand the role of heterotrophic nitrification in soil ecosystems and develop reliable measurement methods for its activity.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Soil Science
Kate E. Matthews, Jose M. Facelli, Timothy R. Cavagnaro
Summary: Global change scenarios predict that precipitation regimes will become more variable, which will affect soil microbial community composition and nutrient cycling. Understanding these responses is crucial for predicting changes in ecosystem functions.
APPLIED SOIL ECOLOGY
(2023)
Article
Forestry
Yi Wang, Shirong Liu, Junwei Luan, Chen Chen, Chunju Cai, Fan Zhou, Yaping Di, Xiaomin Gao
Summary: The study found that throughfall reduction led to a decrease in soil respiration, mainly due to a decline in fine roots biomass; N addition caused microbial carbon limitation, leading to a decrease in soil respiration. The negative effect of throughfall reduction on soil respiration was exacerbated by N addition through the interaction between the two factors.
Article
Soil Science
Kaizad F. Patel, Allison Myers-Pigg, Ben Bond-Lamberty, Sarah J. Fansler, Cooper G. Norris, Sophia A. McKever, Jianqiu Zheng, Kenton A. Rod, Vanessa L. Bailey
Summary: The study revealed that even short-term shifts in moisture conditions can significantly impact soil carbon dynamics, altering the bioavailability of soil organic matter and respiration fluxes.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Plant Sciences
C. Chinchilla-Soto, M. A. Alfaro, F. Bertsch, A. G. Perez-Castillo
Summary: Our study analyzes the N2O emissions from volcanic soils in Costa Rica and Chile. The results show that N addition has a significant effect on N2O emissions in Chilean soils but not in Costa Rican soils, indicating different reactions to incubation conditions.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Geosciences, Multidisciplinary
Hongxin Dong, Shuai Zhang, Junjie Lin, Biao Zhu
Summary: The study found that climate change can increase the impact of drying-wetting cycles on soil microbial biomass carbon and dissolved organic carbon. Soil MBC increases with the number of drying-wetting cycles, while soil DOC decreases with the number of drying-wetting cycles.
