Article
Geosciences, Multidisciplinary
Tao Li, David William Hedding, Jun Chen, Gaojun Li
Summary: This study used proxies based on Sr/Ca and Sr-87/Sr-86 of soil carbonate to reconstruct the evolution of effective precipitation and temperature in the East Asian semi-arid region. The results showed that during Marine Isotope Stage 5, stronger summer monsoon led to lower effective precipitation due to larger increase in evapotranspiration compared to monsoonal precipitation, indicating a risk of further aridification in the semi-arid region of East Asia under climate warming.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Bonnie G. Waring, Kenneth R. Smith, Edmund E. Grote, Armin Howell, Robin Reibold, Colin L. Tucker, Sasha C. Reed
Summary: The study found that water plays a stronger role in controlling soil biogeochemistry than temperature, and precipitation events trigger significant CO2 release and transport of organic C into the soil. Microbial responses to precipitation events lead to rapid metabolism of dissolved organic C inputs, which limits the accumulation of autotroph-derived C underground.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Review
Agronomy
Anandkumar Naorem, Somasundaram Jayaraman, Ram C. Dalal, Ashok Patra, Cherukumalli Srinivasa Rao, Rattan Lal
Summary: The study of Soil organic carbon (SOC) pool has been extensively studied in the carbon (C) cycling of terrestrial ecosystems. However, in dryland regions, soil inorganic carbon (SIC) has received increasing attention due to various factors. The storage of SIC in dryland soils is a complex process that is influenced by multiple factors, and deeper layers of drylands have opened up several study aspects on SIC storage.
Article
Geochemistry & Geophysics
Qizhi Hu, Zekai Wang
Summary: This study investigated the solidification effect of different calcium sources on crushed silty clay using microbial solidification technology. The results showed that the solidification strength decreased gradually with the increase in concentration when using calcium chloride and calcium acetate to solidify the clay. However, calcium gluconate at a concentration of 1.0 mol/L exhibited the highest solidification strength.
Article
Geosciences, Multidisciplinary
Jie Liu, Yan-gui Su, Yan Li, Gang Huang
Summary: The study investigated Delta C-13 enrichment in deserts of northern China, finding that soil Delta C-13 and plant leaf Delta C-13 decreased with mean annual precipitation. Delta delta C-13 was positively related to SOC and soil silt contents, indicating faster SOC decomposition at higher Delta delta C-13 sites. Shrub colonization was found to increase SOC content and regulate SOC decomposition by changing vegetation cover and edaphic variables.
Article
Geochemistry & Geophysics
Brenden J. Fischer-Femal, Gabriel J. Bowen
Summary: This study developed a semi-mechanistic model to explain factors affecting carbon and oxygen isotope values in pedogenic carbonates, which showed strong spatial variation globally. The model was validated and optimized using modern data, offering a new framework for interpreting paired carbon and oxygen isotope data from ancient pedogenic carbonates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Mohammad I. Al-Wabel, Munir Ahmad, Jahangir Ahmad, Nahrir M. A. Lubis, Adel R. A. Usman, Abdullah S. F. Al-Farraj
Summary: Application of manure and compost can lead to accumulation of veterinary antibiotics in soil, posing ecological risks. This study investigated the occurrence and potential ecological risk assessment of nine antibiotics residues in soil, manure, and compost samples from Al-Kharj, Saudi Arabia. While most studied antibiotics showed low risk quotient values, oxytetracycline and doxycycline had higher values, indicating possible adverse ecological effects in soil.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2021)
Article
Soil Science
Stewart B. Wuest, William F. Schillinger, Stephen Machado
Summary: This study examined the impacts of minimum tillage and no-till systems on soil organic carbon (SOC) levels in the inland Pacific Northwest region of the USA. The results showed that no-till did not result in higher SOC levels compared to minimum tillage. Therefore, judicious tillage can be considered as an option for sustainable production.
SOIL & TILLAGE RESEARCH
(2023)
Article
Ecology
Alexander H. Krichels, Aral C. Greene, G. Darrel Jenerette, Marko J. Spasojevic, Sydney I. Glassman, Peter M. Homyak
Summary: Climate change affects precipitation, which in turn influences nitrogen cycling and nitric oxide emissions. The study found that excluding or adding winter precipitation increased nitric oxide emissions in the following summer, with higher emissions observed in both cases compared to control plots. Excluding winter precipitation led to inorganic nitrogen accumulation, while adding winter water resulted in increased microbial biomass. These precipitation legacies can accelerate soil nitric oxide emissions and amplify ecosystem nitrogen loss.
Article
Environmental Sciences
Emre Babur, Turgay Dindaroglu, Subhan Danish, Max M. Haggblom, Ekrem Ozlu, Gafur Gozukara, Omer Suha Uslu
Summary: This study used interpolation methods to investigate the impact of wildfire on soil organic carbon, microbial biomass carbon concentrations, and soil quality indices in a red pine forest. The results showed that wildfire increased soil carbon stocks, total nitrogen, pH, and qCO2, but decreased microbial biomass carbon and nitrogen.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Soil Science
K. R. Ball, A. A. Malik, C. Muscarella, J. C. Blankinship
Summary: Irrigation in arid croplands is necessary but may need to shift to dripping techniques due to water scarcity. This study found that drip irrigation increased soil organic carbon (SOC) while flood irrigation stored more soil inorganic carbon (SIC). Calcium binding played a role in SOC-SIC patterns. Flood irrigation added more calcium and bicarbonate, while drip irrigation maintained calcium and SOC in the rooting zone. Bacterial biomass was higher under flood, promoting microbial carbonate precipitation.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Plant Sciences
Nicolas Louw, Laureano A. Gherardi, Osvaldo E. Sala, Y. Anny Chung
Summary: This study investigates the effects of long-term increased precipitation variability and host type on soil fungal diversity and community composition in a dryland ecosystem. The results show that soil fungal alpha diversity and community composition are strongly influenced by host type and sampling year, and increased precipitation variability may result in a slight decrease in soil fungal evenness.
JOURNAL OF ECOLOGY
(2022)
Article
Environmental Sciences
Tohid Rouhi Kelarlou, Ahmad Golchin, Ali-Ashraf Soltani Toolarood
Summary: Herbicide application in agriculture has a significant impact on non-target soil microorganisms and their functions. A pot experiment evaluated the effects of different doses of clopyralid, butisanstar, and their combination on microbial indicators. The results showed a significant reduction in all indicators after herbicide application, but temporary recovery and an increase were observed after 60 days.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Agriculture, Multidisciplinary
Ai-Tian Ren, Rui Zhou, Fei Mo, Shu-Tong Liu, Ji-Yuan Li, Yinglong Chen, Ling Zhao, You-Cai Xiong
Summary: The study found that plastic mulching significantly increased evapotranspiration and improved soil water storage, especially with more pronounced effects on deep soil water storage and better performance in conditions of lower precipitation.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2021)
Article
Soil Science
Bo Xiao, Matthew A. Bowker, Yunge Zhao, Sonia Chamizo, Oumarou Malam Issa
Summary: Biocrusts are photosynthetic biotic communities that aggregate minerals at the soil surface in harsh environments. They play important ecological roles in modifying soil properties and regulating functions. This collection of research articles highlights the significance of biocrusts in reshaping soil properties and multifunctionality, as well as the impact of global change factors on biocrust-soil systems.
Article
Geosciences, Multidisciplinary
M. Bayani Cardenas, Raymond S. Rodolfo, Mark R. Lapus, Hillel B. Cabria, Jose Ftdlon, Gordos R. Gojunco, Daniel O. Breecker, Danica M. Cantarero, Jaivime Evaristo, Fernando P. Siringan, Tongwei Zhang
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geography, Physical
Julia R. Kelson, Katharine W. Huntington, Daniel O. Breecker, Landon K. Burgener, Timothy M. Gallagher, Gregory D. Hoke, Sierra Petersen
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Environmental Sciences
Sol C. Cooperdock, Christine V. Hawkes, Derry R. Xu, Daniel O. Breecker
GLOBAL BIOGEOCHEMICAL CYCLES
(2020)
Article
Geography, Physical
Shunchuan Ji, Long Ma, Junsheng Nie, Shengyun Chen, Youbin Sun, Daniel O. Breecker
Summary: Soil respiration is crucial for understanding CO2 fluxes, with spatial S(z) variations mainly controlled by monsoonal precipitation. Monitoring work in higher precipitation areas is needed for better constraint of S(z) values.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Natasha Sekhon, Valdir F. Novello, Francisco W. Cruz, Barbara E. Wortham, Tulio G. R. Ribeiro, Daniel O. Breecker
Summary: The study reveals the significant impact of cave ventilation on cave geochemical properties, with different caves showing variations in CO2 concentrations and ventilation regimes across seasons. Buoyancy-driven cave ventilation is identified as a common mechanism in caves across low and mid-latitudes.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geography, Physical
Valdir Felipe Novello, Francisco William da Cruz, Mathias Vuille, Jose Leandro Pereira Silveira Campos, Nicolas Misailidis Strikis, James Apaestegui, Jean Sebastien Moquet, Vitor Azevedo, Angela Ampuero, Giselle Utida, Xianfeng Wang, Gustavo Macedo Paula-Santos, Plinio Jaqueto, Luiz Carlos Ruiz Pessenda, Daniel O. Breecker, Ivo Karmann
Summary: This study focuses on investigating the influence of local hydroclimate, altitude, temperature, and vegetation types on the delta C-13 values in stalagmites. The results show that the main factors influencing delta C-13 values are associated with the local hydroclimate, and there is a significant correlation between delta C-13 and delta O-18 values in most records.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Fangliang Li, Shouye Yang, Daniel O. Breecker, Evan J. Ramos, Xiangtong Huang, Zongqi Duan, Yulong Guo, Chao Li, Xi Mei
Summary: Silicate weathering plays a key role in maintaining a habitable climate on Earth. Over the past 4 million years, weathering intensity has been decreasing, corresponding to global cooling. East Asia shows a more sensitive response to temperature change compared to Southeast Asia, possibly due to amplified midlatitude cooling.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Lee Nordt, Daniel Breecker, Joseph White
Summary: Research suggests that during the Early Jurassic period, ice sheets melted when CO2 concentrations reached 500-700 ppm, indicating they were thin, located at lower latitudes and elevations, and had a higher temperature sensitivity to melting. These findings provide additional constraints for climate models.
Article
Geosciences, Multidisciplinary
Timothy M. Gallagher, Lily Serach, Natasha Sekhon, Hanzhi Zhang, Hanlin Wang, Shunchuan Ji, Xi Chang, Huayu Lu, Daniel O. Breecker
Summary: Paleosols in the Red Clay depositional sequence of the Chinese Loess Plateau provide valuable information on vegetation and regional hydrology responses to global temperature variation during the late Miocene and Pliocene. Studying carbon isotopes of pedogenic carbonate and occluded organic matter reveals a decline in moisture availability across the Loess Plateau with higher sensitivity to arid conditions in the northwest. The Jiaxian record shows increasing delta C-13 values over time, with no evidence of C-4 vegetation before 3.6 Ma, and spatial patterns suggest a gradient of higher and more variable delta C-13 values towards the north-northwest direction.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geology
Michael M. Joachimski, Johann Mueller, Timothy M. Gallagher, Gregor Mathes, Daoliang L. Chu, Fedor Mouraviev, Vladimir Silantiev, Yadong D. Sun, Jinnan N. Tong
Summary: The study reconstructed the atmospheric CO2 history from the late Permian to the Early Triassic, showing a significant increase in CO2 concentrations during the warm periods, potentially contributing to the end-Permian mass extinction event.
Article
Geosciences, Multidisciplinary
Peng Gao, Junsheng Nie, Daniel O. Breecker, Timothy Gallagher, Lily Serach, Ana M. Alonso-Zarza
Summary: Insolation plays a dominant role in Asian precipitation during the late Pliocene, while the understanding of Pliocene European climate is limited due to the lack of European loess research. This study reveals a likely similar magnetic enhancement mechanism between Pliocene sediments from Spain and Chinese loess, providing an opportunity to improve understanding of Pliocene climate in Europe. It is demonstrated that insolation and ice sheets development are important factors in controlling European wet-dry variations during the Pliocene.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Evan J. Ramos, Daniel O. Breecker, Jaime D. Barnes, Fangliang Li, Philip D. Gingerich, Staci L. Loewy, Aaron M. Satkoski, Allison A. Baczynski, Scott L. Wing, Nathaniel R. Miller, John C. Lassiter
Summary: This study quantifies changes in silicate weathering intensity during the PETM by measuring the chemistry of bedrock and ancient floodplain sediment in the Bighorn Basin, Wyoming. The results show a rapid increase in silicate weathering intensity during the PETM, which remains elevated even as climate begins to recover. Soils farthest from ancient river channels undergo larger weathering changes, indicating active weathering responses on floodplains.
GEOPHYSICAL RESEARCH LETTERS
(2022)