Article
Agronomy
Christopher Jorelle Gillespie, Joao Arthur Antonangelo, Hailin Zhang
Summary: Intense cultivation and excessive use of ammoniacal fertilizer have expedited soil acidification in the southern Great Plains and many other parts of the world. The study revealed significant differences in edaphic responses to two soil amendments at different study sites, with the divergence possibly attributed to a combination of factors.
Article
Forestry
Jianfeng Hou, Fei Li, Zhihui Wang, Xuqing Li, Rui Cao, Wanqin Yang
Summary: Dissolved carbon (DC) in forest streams plays a crucial role in maintaining the structure and productivity of adjoining aquatic ecosystems as well as informing biogeochemical links between mountain forests and adjoining rivers. However, the functions of forest stream DC dynamics are rarely incorporated into river management. This study investigated the seasonal dynamics of DC in 15 representative forest streams in a geographically fragile subalpine-gorge catchment in the upper reaches of the Yangtze River. The results showed that precipitation, temperature, water discharge rate, and sediment depth regulated the stocks and export rates of DC and its components. Forest streams are important links between the carbon biogeochemical cycle of subalpine forests and adjoining streams.
Article
Geosciences, Multidisciplinary
Hewen Niu, Shichang Kang, Chandan Sarangi, Guotao Zhang, Mengxue Chen, Yuzhong Zhang, Huili Qin
Summary: This study systematically determines the organic and inorganic constituents in water bodies of the cryosphere region in the eastern Tibetan Plateau and finds that high-elevation water bodies have lower organic carbon content. Additionally, it suggests that atmospheric deposition and anthropogenic activities contribute to the observed patterns in organic carbon and nitrogen content.
Article
Environmental Sciences
Markel Gomez-Letona, Marta Sebastian, Isabel Banos, Maria Fernanda Montero, Claudia Perez Barrancos, Moritz Baumann, Ulf Riebesell, Javier Aristegui
Summary: Artificial upwelling can increase the concentration of dissolved organic matter (DOM) in the ocean and change its characteristics. More intense treatments result in higher accumulation of dissolved organic carbon and stronger changes in DOM characteristics. Single upwelling pulses lead to higher molecular weight CDOM compared to recurring upwelling modes. Under artificial upwelling, large amounts of DOM may accumulate in the surface ocean without being remineralized in the short-term.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Mengyue Wu, Yini Ma, Huixiang Xie, Rong Ji
Summary: Photodissolution has the potential to efficiently remove microplastics from the surface ocean, and temperature and incident sunlight composition play critical roles in this process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Gang Xue, Yanjun Cai, Peng Cheng, Franziska A. Lechleitner, Haiwei Zhang, Yanhong Zheng, Yingying Wei, Shouyi Huang, Ling Yang, Xing Cheng, Yanbin Lu, Jie Zhou, Le Ma, Hai Cheng, R. Lawrence Edwards
Summary: This study utilizes Holocene speleothem U-Th ages and C-14 ages of carbonate and dissolved organic carbon (DOC) to investigate the spatial variability of SOC turnover in China. The deviations between speleothem C-14(DOC) ages and U-Th ages show a positive correlation with mean ages of modern SOC and soil turnover time, indicating that the deviations can be used as indicators of SOC turnover. Additionally, the study reveals that slow SOC turnover is associated with weak monsoons on temporal scales.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Federico Baltar, Xose A. Alvarez-Salgado, Javier Aristegui, Ronald Benner, Dennis A. Hansell, Gerhard J. Herndl, Christian Lonborg
Summary: The text discusses the transformation and sequestration of organic carbon produced in the sunlit surface ocean into the ocean's interior, focusing on the refractory dissolved organic carbon (rDOC). It emphasizes the importance of defining rDOC operationally and highlights the various factors influencing its persistence, including intrinsic and extrinsic properties. The text also suggests specific research questions aimed at stimulating further research on the nature, dynamics, and role of rDOC in carbon sequestration under future scenarios of climate change.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Hongyan Bao, Jing Qiao, Ruoyang Zhang, Dekun Huang, Baiyun Wang, Xihuang Lin, Shuh-Ji Kao
Summary: In this study, the temporal variation and influential factors of rainwater dissolved organic matter (DOM) were tracked at a coastal site using dissolved organic carbon (DOC), UV-vis spectra, and molecular markers. The results showed negative correlations between DOC, light absorption, and precipitation amount, as well as higher DOM concentrations in spring and in rain influenced by the land. Human emissions and secondary production played important roles in regulating the level of DOM concentration, and environmental variables confirmed the input from anthropogenic activities. Future studies should focus on how atmospheric deposition affects biogeochemical cycles in coastal regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
William H. McDowell
Summary: Dissolved organic matter (DOM) is a heterogeneous mixture of organic compounds that is produced through microbial degradation and abiotic leaching, and it plays an important role in aquatic ecology and watershed management. The challenges in studying DOM include monitoring long-term changes, using sensors for short-term dynamics, understanding its role in the carbon cycle and greenhouse gas evasion, and exploring its evolutionary significance in various environments.
Article
Engineering, Civil
Ewen Silvester, Terry Karis, Anne Yusuf, John Pengelly, Samantha Grover, Gavin N. Rees
Summary: The study found that storm events mobilized dissolved organic carbon and nitrogen, with proteins playing a key role and exhibiting different dynamics at different stages of the storm. This suggests that there is spatial and temporal separation of molecular groups within the pools of dissolved organic carbon and nitrogen, leading to changing composition of DOC through a storm cycle.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Environmental
Derrick R. Vaughn, Anne M. Kellerman, Kimberly P. Wickland, Robert G. Striegl, David C. Podgorski, Jon R. Hawkings, Jaap H. Nienhuis, Mark M. Dornblaser, Edward G. Stets, Robert G. M. Spencer
Summary: Anthropogenic conversion of forests and wetlands to agricultural and urban landcovers impacts dissolved organic matter (DOM) within streams draining these catchments, but research on how it affects DOM molecular composition and bioavailability is lacking. In a study of the Upper Mississippi River Basin, it was found that streams draining urban areas had higher bioavailable DOC (BDOC) concentrations compared to streams draining agricultural and forested areas. The conversion of forested landcover to urban had a greater impact on stream DOM bioavailability than conversion to agricultural landcover.
Article
Engineering, Environmental
Katerina Novotna, Lenka Pivokonska, Lenka Cermakova, Michaela Prokopova, Katerina Fialova, Martin Pivokonsky
Summary: Widespread pollution of aquatic environments by microplastics is a serious environmental threat. This study found that different types of microplastics released significant amounts of dissolved organic carbon and inorganic carbon when in contact with water for a long time. Various elements and harmful compounds were also leached from the microplastics. These results provide insight into the transfer of various compounds from microplastics to ambient water.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
Christian B. Lewis, Brett D. Walker, Ellen R. M. Druffel
Summary: Radiocarbon measurements indicate that the deep ocean stores marine dissolved organic carbon (DOC) over millennial timescales, with solid-phase extraction (SPE) being a widely used technique to isolate DOC for analysis. Results show that the refractory DOC (RDOC) abundance is similar in the deep Pacific and Indian Oceans, while varying in the surface ocean based on total DOC concentration. This study fills in sampling gaps for SPE-DOC increment C-14 in the global ocean and provides consistent estimates of RDOC abundance compared to previous observations.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Huiying Zhang, Wei Qian, Liang Wu, Shuhan Yu, Ran Wei, Weifeng Chen, Jinzhi Ni
Summary: This study investigates the emissions and spectral characteristics of biochar-derived dissolved organic carbon (BDOC) and smoke-derived dissolved organic carbon (SDOC), and finds differences in their chemistry and bioavailability.
Article
Environmental Sciences
Adam S. Wymore, Penny J. Johnes, Susana Bernal, E. N. Jack Brookshire, Hannah M. Fazekas, Ashley M. Helton, Alba Argerich, Rebecca T. Barnes, Ashley A. Coble, Walter K. Dodds, Shahan Haq, Sherri L. Johnson, Jeremy B. Jones, Sujay S. Kaushal, Pirkko Kortelainen, Carla Lopez-Lloreda, Bianca M. Rodriguez-Cardona, Robert G. M. Spencer, Pamela L. Sullivan, Christopher A. Yates, William H. McDowell
Summary: A comprehensive assessment of nitrogen species in stream water reveals shifts in dissolved nitrogen pool composition from highly heterogeneous to primarily inorganic nitrogen under nutrient enrichment from human disturbances. With increasing total dissolved nitrogen concentrations, inorganic nitrogen dominates the pool while dissolved organic nitrogen decreases. These changes in stoichiometry may have significant implications for global biogeochemical cycles of carbon and nitrogen in freshwater ecosystems.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Plant Sciences
Claudio Kapp-Junior, Eduardo Favero Caires, Alaine Margarete Guimaraes, Andre Carlos Auler
JOURNAL OF PLANT NUTRITION
(2020)
Article
Agronomy
Eduardo Favero Caires, Angelo Rafael Bini, Leonardo Felipe Camargo Barao, Adriano Haliski, Vanderson Modolon Duart, Kaynna da Silva Ricardo
Summary: In a high-yield environment, inoculation with Azospirillum brasilense caused slight changes in the nitrogen, phosphorus, and potassium concentrations in cereal crops, with varying effects on maize and wheat. Wheat showed a more significant response to inoculation compared to maize, particularly in response to nitrogen application levels. Rainfall distribution during growing seasons may also impact the crop responses to inoculation and nitrogen fertilization levels. Overall, inoculation resulted in increased maize and wheat yields under similar nitrogen input, with the strategy showing potential economic gains.
Article
Soil Science
Salome Urrea-Valencia, Rafael Mazer Etto, Willian Yuiti Takahashi, Eduardo Favero Caires, Angelo Rafael Bini, Ricardo Antonio Ayub, Maria Isabel Stets, Leonardo Magalhaes Cruz, Carolina Weigert Galvao
Summary: Although Azospirillum brasilense is commonly used in inoculant formulations, its prevalence in field conditions is still limited. In this study, A. brasilense was found in soil only at radicle emergency, and from the fifth day onwards, it was detected in roots at concentrations ranging from 10(3) to 10(5) CFU g(-1) of fresh root. This research provided a sensitive method for monitoring A. brasilense in field trials and offered new insights into the ecology of maize and A. brasilense interaction.
APPLIED SOIL ECOLOGY
(2021)
Article
Environmental Sciences
Flavio Henrique Silveira Rabelo, Jose Lavres, Flavio Araujo Pinto, Luis Reynaldo Ferracciu Alleoni
Summary: The study found that increasing base saturation did not consistently reduce the accumulation of barium, cadmium, copper, nickel, and zinc in lettuce, rice, sunflower, and tomato. This could be attributed to the low capacity of the soil to control the bioavailability of trace elements.
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Soil Science
Vanderson Modolon Duart, Fernando Jose Garbuio, Eduardo Favero Caires
Summary: This study evaluated the effects of dolomitic lime and phosphogypsum applications on soil chemical attributes, plant nutrition, and grain yield in direct-seeded flooded rice. Liming alleviated topsoil acidity and increased soil pH, while phosphogypsum application increased nutrient availability throughout the soil profile. Overall, phosphogypsum application improved rice yield by 10-11% by increasing SO4-S availability in the soil profile.
SOIL & TILLAGE RESEARCH
(2021)
Article
Plant Sciences
Joao William Bossolani, Carlos Alexandre Costa Crusciol, Ariani Garcia, Luiz Gustavo Moretti, Jose Roberto Portugal, Vitor Alves Rodrigues, Mariley de Cassia da Fonseca, Juliano Carlos Calonego, Eduardo Favero Caires, Telmo Jorge Carneiro Amado, Andre Rodrigues dos Reis
Summary: Long-term surface application of lime and/or phosphogypsum can improve soil fertility, enhance plant growth, and increase yield of maize. This practice also improves physiological functions of plants, increasing concentrations of photosynthetic pigments, gas exchange, and antioxidant enzyme activities, while reducing oxidative stress.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Eduardo Favero Caires, Debora Alice Pauluk, Vanderson Modolon Duart, Fernando Jose Garbuio
Summary: The study demonstrated that phosphogypsum can significantly increase the yield of wheat-soybean rotation system, especially when used in conjunction with moderate urea application, which is beneficial for increasing nutrient content and improving soil structure.
JOURNAL OF PLANT NUTRITION
(2022)
Article
Biotechnology & Applied Microbiology
W. Y. Takahashi, C. W. Galvao, S. Urrea-Valencia, D. R. P. Goncalves, D. Hyeda, E. F. Caires, R. M. Etto
Summary: The study evaluated the impact of insecticide and fungicide formulations on the population of A. brasilense and its ability to promote plant growth. It found that seed pesticide dressings led to increased mortality of A. brasilense and decreased its ability to promote wheat growth. However, immediate inoculation and seed treatment before sowing can maintain the beneficial effects of A. brasilense.
LETTERS IN APPLIED MICROBIOLOGY
(2022)
Article
Agronomy
Joao William Bossolani, Carlos Alexandre Costa Crusciol, Luiz Gustavo Moretti, Ariani Garcia, Jose Roberto Portugal, Leila Bernart, Rafael Goncalves Vilela, Eduardo Favero Caires, Telmo Jorge Carneiro Amado, Juliano Carlos Calonego, Andre Rodrigues dos Reis
Summary: The study found that applying lime combined with phosphogypsum in tropical no-till systems can improve soil fertility, enhance soybean root growth, and increase plant nutrition and physiological responses, resulting in improved crop resistance to dry spells. These long-term soil amendments also increased the movement of cationic bases and roots in the soil profile, improving soybean nutrition. Moreover, the application of lime and phosphogypsum enhanced carbon and antioxidant metabolism in soybean plants, leading to higher grain yield despite the occurrence of dry spells in the tropical region.
AGRONOMY FOR SUSTAINABLE DEVELOPMENT
(2022)
Article
Environmental Sciences
Flavio Henrique Silveira Rabelo, Felipe Hipolito dos Santos, Jose Lavres, Luis Reynaldo Ferracciu Alleoni
Summary: The study on Panicum maximum grown in mildly spiked soils with varying Cd concentrations found that Cd-induced toxicity is stronger in the early stages of development, with Cd accumulation primarily at the basal node. Elements such as P, K, Mg, S, and Cu play a role in restricting Cd translocation, while the nutritional adjustments of the plant to deal with Cd stress did not negatively impact phytoextraction efficiency.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Rafael Marques Pereira Leal, Adijailton Jose de Souza, Marina Yasbek Reia, Luis Reynaldo Ferracciu Alleoni, Valdemar Luis Tornisielo, Jussara Borges Regitano
Summary: This study investigated the sorption of sulfadiazine (SDZ) in Brazilian soils with varying metal (oxy)hydroxide contents. The results showed that soils with high clay, organic matter, and metal (oxy)hydroxide contents had high SDZ sorption coefficients, while soils with low contents had low sorption coefficients.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Agronomy
Rodolfo F. F. Costa, Ruan F. F. Firmano, Joao W. Bossolani, Luis R. F. Alleoni
Summary: This study evaluated the effects of broadcast lime and phosphogypsum (PG) application on soil chemical properties, soil enzyme activity, and crop production in a no-tillage system (NTS) area under crop rotation for 15 years. The results showed that the joint application of lime and PG can improve soil fertility, soil enzyme activity, and crop yields.
INTERNATIONAL JOURNAL OF PLANT PRODUCTION
(2023)
Article
Agronomy
Eduardo Favero Caires, Vanderson Modolon Duart, Giovanna Ludmila Alves Rodrigues, Angelo Rafael Bini
Summary: The effect of phosphogypsum on phosphate fertilization efficiency was investigated, and it was found that phosphogypsum can significantly increase the yield of soybean, wheat, and black oat. The use of phosphogypsum can improve the agronomic P-use efficiency and crop yield performance, especially under drought stress.
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Camila Maione, Eloa Moura Araujo, Sabrina Novaes dos Santos-Araujo, Alexys Giorgia Friol Boim, Rommel Melgaco Barbosa, Luis Reynaldo Ferracciu Alleoni
Summary: This study proposes a new method to identify the geographical origin of Brazilian lettuce using support vector machines (SVM) applied to elemental composition and soil properties. The SVM models outperformed traditional linear discriminant analysis (LDA) models and achieved a high prediction accuracy of 98% to discriminate lettuce from different states. Soil exchangeable cation capacity, soil contents of low crystalized Al, and Zn content in lettuce samples were found to be the most relevant components for differentiation.
Article
Chemistry, Analytical
Matheus Sampaio Carneiro Barreto, Josimar Viera dos Reis, Takashi Muraoka, Martin Jemo, Leonardus Vergutz, Luis Reynaldo F. Alleoni
Summary: This study evaluated the effects of phosphorus fertilization on maize plants using a combination of classic leaf pigment quantification and DRIFT spectroscopy analysis. Results showed that under high phosphorus availability, maize biomass, phosphorus uptake, and chlorophyll content significantly increased. Moreover, DRIFT spectroscopy revealed higher levels of proteins and polysaccharides under low phosphorus availability, indicating inefficient nitrogen metabolism.
