Article
Environmental Sciences
Ulo Mander, Mikk Espenberg, Lulie Melling, Ain Kull
Summary: Peatland restoration is crucial for mitigating greenhouse gas emissions and retaining carbon, and this study analyzes the impact of different restoration measures on greenhouse gas emissions and carbon retention. The research finds that carbon dioxide emissions have the most significant long-term climate impact, while losses of dissolved and particulate carbon in water are also important factors.
Article
Agronomy
Damian Fernandez-Rodriguez, David Paulo Fangueiro, David Pena Abades, Angel Albarran, Jose Manuel Rato-Nunes, Antonio Lopez-Pineiro
Summary: This study assessed the greenhouse gas emissions from rice fields amended with composted two-phase olive mill waste (C-TPOW) in Mediterranean conditions. The results showed that compost reduced CO2 emissions but increased CH4 and N2O emissions. However, there were no significant differences in global warming potential (GWP) and yield-scaled GWP between the compost and control treatments after three years.
Article
Environmental Sciences
Ziqian Li, Lingwei Kong, Liping Hu, Jun Wei, Xinzhi Zhang, Weijie Guo, Wenqing Shi
Summary: In this study, a bibliometric review and global-scale analysis were conducted to explore the potential approaches for controlling greenhouse gas (GHG) emissions in constructed wetlands (CWs). The research on CWs has evolved through three stages over the past 15 years: GHG emission level assessment, mechanisms, and control. It was found that the type of CWs is closely related to GHG emissions, with different types emitting different GHGs. Optimizing CW operation can synergistically reduce GHG emissions while enhancing pollutant removal.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Sniezynska, Aleksandra Krazala, Artur Banach, Ivica Ristovic, Miroslaw Slowakiewicz, Zofia Stepniewska
Summary: Changes in the energy market are causing a projected reduction in lignite excavation in the near future. The flooding of lignite mines left abandoned can potentially release greenhouse gases, which is a growing environmental concern. Research has shown that different types of lignite have varying greenhouse gas emissions, with lignite with shorter existence emitting the lowest amount of gases with global warming potential.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
V Amaral, T. Ortega, C. Romera-Castillo, J. Forja
Summary: The Guadalete estuary in Spain was found to be a source of CO2, CH4, and N2O to the atmosphere, with CH4 showing the strongest relationship with DOM composition. Terrestrial and microbial humic-like substances with increasing aromaticity were linked to higher pCO2 levels, while N2O was related to the protein-like fraction and humic-like material from anthropogenic activities. This indicates a possible coupling between benthic fluxes of GHGs and DOM in this estuarine system, highlighting the importance of considering DOM composition in studying GHGs distribution in estuaries for better understanding of their roles in response to climate change.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Alexander J. Schmithausen, Hauke F. Deeken, Katrin Gerlach, Manfred Trimborn, Kirsten Weiss, Wolfgang Buescher, Gerd-Christian Maack
Summary: This study investigated the formation of greenhouse gases during the ensiling process, focusing on the variations in CO2, N2O, and CH4 concentrations in forage. Grass and lucerne were ensiled at different dry matter concentrations in laboratory-scale barrels, showing that low DM concentration led to faster CO2 production, while lucerne forage and higher DM concentrations resulted in increased N2O concentrations. The study also found that butyric acid formation by clostridia contributed to CH4 formation, with lucerne silage exhibiting significantly higher concentrations from day 13 of ensiling. These findings highlight the impact of malfermentation on greenhouse gas emissions during ensiling.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agriculture, Multidisciplinary
Alice F. Charteris, Paul Harris, Karina A. Marsden, Ian M. Harris, Ziwei Guo, Deborah A. Beaumont, Helena Taylor, Gianmarco Sanfratello, Davey L. Jones, Sarah C. M. Johnson, Mick J. Whelan, Nicholas Howden, Hadewij Sint, David R. Chadwick, Laura M. Cardenas
Summary: Greenhouse gas fluxes from livestock grazed pasture soils exhibit high variability, influenced by local conditions. Nitrogen, ammonia, soil moisture, etc. play significant roles in regulating fluxes on different pastures for various greenhouse gases.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2021)
Article
Environmental Sciences
Mohammad Atif Khan, Sanjeev Kumar, Rajdeep Roy, Satya Prakash, Aneesh A. Lotliker, Sanjiba Kumar Baliarsingh
Summary: The potential effects of tidal and diel cycles on carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) concentrations and fluxes in tropical estuaries are poorly understood. This study conducted sampling for nine consecutive days in the Mahanadi estuary of India and found that tidal forcing affected CO2 and CH4 concentrations, with higher concentrations during low tide. CO2 concentrations increased with decrease in tidal height, possibly due to higher freshwater contribution. N2O showed no significant variability with tidal cycle or water level fluctuation. The study area was a source of greenhouse gases to the atmosphere, except for the offshore region.
MARINE POLLUTION BULLETIN
(2023)
Article
Agronomy
Carolina Fabbri, Anna Dalla Marta, Marco Napoli, Simone Orlandini, Leonardo Verdi
Summary: Precision fertilization, including variable-rate fertilization, is a promising approach to reduce the environmental impacts of nitrogen fertilization. This study evaluated the short-term response of greenhouse gas emissions following variable-rate fertilization on barley. The results showed that variable-rate fertilization can maintain high yields with a significant reduction in nitrogen application and improved nitrogen use efficiency. However, the sensor-based nitrogen application did not result in significantly different greenhouse gas emissions compared to conventional fertilization, suggesting the need for further research.
Article
Engineering, Environmental
Nicholas E. Ray, Robinson W. Fulweiler
Summary: In oyster habitats, the sediments show peak carbon dioxide production in spring and summer, as well as consistent methane release into the water column, while nitrous oxide is generally absorbed with occasional release in spring. The overall impact of oysters on sediment greenhouse gas cycling in temperate regions is considered negligible.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Nicholas E. Ray, Meredith A. Holgerson
Summary: Inland waters, especially small ponds, have a significant but poorly understood role in global greenhouse gas emissions. This study conducted high-resolution temporal sampling and found that temperate constructed ponds are a net source of greenhouse gases, with methane emissions being highly variable within seasons. The study suggests that building ponds to favor mixed conditions can help minimize the global greenhouse gas footprint of future pond construction.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Green & Sustainable Science & Technology
Chinedu Increase Onwachukwu, Kit-Ming Isabel Yan, Kerui Tu
Summary: The study found a significant impact of trade liberalization on environmental quality, challenging the use of a single indicator to assess this relationship.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Weifeng Gao, Dawen Gao, Tijiu Cai, Hong Liang
Summary: This study investigated the effects of different permafrost wetland types on greenhouse gas emissions in the Daxing'an Mountains. The results showed that N2O emissions were influenced by the NO3--N content, while CO2 emissions were driven by soil temperature, water table level, and NO3--N content. CH4 emissions were affected by soil temperature and water table level. The study concluded that the permafrost wetland types significantly affected the emissions of N2O, CO2, and CH4.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Review
Environmental Sciences
Danlian Huang, Lan Gao, Min Cheng, Ming Yan, Gaoxia Zhang, Sha Chen, Li Du, Guangfu Wang, Ruijin Li, Jiaxi Tao, Wei Zhou, Lingshi Yin
Summary: Composting plays a crucial role in carbon and nitrogen conservation, but losses of carbon and nitrogen still occur during the process. Researchers have explored ways to reduce these losses and enhance conservation through amendments, and proposed potential mechanisms for conservation. Evaluating the contribution of composting requires a comprehensive assessment, and the impact of compost clinker on carbon and nitrogen sequestration capacity needs further investigation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Plant Sciences
Bonginkosi S. Vilakazi, Rebecca Zengeni, Paramu Mafongoya, Napo Ntsasa, James Tshilongo
Summary: There is limited research on greenhouse gas emissions in dryland agriculture in South Africa, hindering policy formulation for mitigation and adaptation in the sub-Saharan region. The study aimed to assess CO2, N2O, and CH4 effluxes under different nitrogen fertilizer management in conventional tillage and no-till systems across seasons. Higher GHG emissions in summer were attributed to soil temperature and moisture, with tillage intensity and climatic conditions influencing emissions direction. Conservation tillage, particularly no-till at 120 kg N ha(-1), is recommended for lower emissions, especially during summer.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2021)
Article
Ecology
Trine Just Johnsen, Lisbeth Dalsgaard Romme Henriksen, Mette Bundgaard Larsen, Helena Kallestrup, Soren Erik Larsen, Tenna Riis, Annette Baattrup-Pedersen
Summary: The study reveals that suitable habitats for declining Potamogeton species exist in restored stream reaches in Denmark, but the continued growth of some species may be challenged by limited overwintering success. Dispersal constraints may prevent declining Potamogeton species from naturally recolonizing restored stream reaches. Understanding the importance of life history traits such as overwintering and dispersal is crucial for the recovery of plant diversity in streams.
FRESHWATER BIOLOGY
(2022)
Article
Environmental Sciences
Annette Baattrup-Pedersen, Trine Just Johnsen, Soren Erik Larsen, Tenna Riis
Summary: This study aims to investigate the distribution of diatoms in Danish lowland streams and explore the potential interference of alkalinity with diatom-based ecological assessment. The findings show that alkalinity influences the benthic algae community and different species of diatoms are associated with different levels of alkalinity. Moreover, the current ecological status indicator may overestimate the ecological status in moderately to highly alkaline streams despite low phosphate levels. Therefore, there is a need to develop a diagnostic method to differentiate the effects of alkalinity from eutrophication and gain more insight into the autecology of species for better ecological management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agronomy
Rasmus R. Frederiksen, Soren E. Larsen, Gitte Blicher-Mathiesen, Brian Kronvang
Summary: A parsimonious statistical model was developed to estimate annual tile flow in tile-drained soils at both field and catchment scales. The model, based on the linear relationship between tile flow and precipitation, was derived and validated using data from 38 drainage stations in Denmark. The evaluation showed that the model performed well at catchment scale and can be used in agricultural water management.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Plant Sciences
Chiara Esposito, Thomas P. A. Nijman, Annelies J. Veraart, Joachim Audet, Eti E. Levi, Torben L. Lauridsen, Thomas A. Davidson
Summary: Shallow lakes produce and emit significant amounts of methane, and methane-oxidizing bacteria play a role in reducing these emissions. However, the role of aquatic plants in methane oxidation is not well understood. This study compared methane oxidation rates and bacteria abundance associated with different types of aquatic plants. The results showed that various plant types have different rates of methane oxidation, and high biomass of macrophytes is associated with reduced methane concentration in the water.
Article
Environmental Sciences
Finn Plauborg, Maja H. Skjodt, Joachim Audet, Carl C. Hoffmann, Brian H. Jacobsen
Summary: Nitrogen and phosphorus losses to surface and coastal waters remain high, but woodchip bioreactors in Denmark have shown promise in reducing nitrogen levels in agricultural drainage water, although they are costly.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Engineering, Environmental
Wang Shu, Fadong Li, Qiuying Zhang, Zhao Li, Yunfeng Qiao, Joachim Audet, Gang Chen
Summary: Ion-adsorption rare earth mining leads to high levels of nitrogen, multiple metals, and strong acidic mine drainage, which have unclear impacts on microbial assembly and ecological functions. We studied river sediments from China's largest ion-adsorption rare earth mine and found that bacterial community assembly was weakly influenced by spatial dispersion. Dispersal limitation and homogeneous selection were the dominant ecological processes, and bacterial alpha diversity decreased with pollution. Bacteria developed survival strategies to adapt to the extreme environment, sustaining species diversity and community stability.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Soil Science
Zhi Liang, Jim Rasmussen, Christopher Poeplau, Lars Elsgaard
Summary: Meta-analyses suggest a global potential of cover crops to increase soil organic carbon (SOC) stocks. However, there is a large variation across studies, highlighting the need to understand the effect of cover crops on carbon sequestration under specific soil and climate conditions. A Danish long-term field experiment (LTE) and a mesocosm study were conducted to investigate the carbon sequestration potential of cover crops. The results showed that cover cropping for up two decades had negligible effect on SOC, but significant overall SOC increases were observed when cover crop carbon input exceeded certain rates. This suggests that agricultural management practices should be adopted to achieve sufficient cover crop carbon input.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Soil Science
Yige Liu, Mengxuan Shi, Zonghai Chen, Zijie Tang, Jiayu Tan, Jihui Tian, Lars Elsgaard, Ying Lu, Bo Li
Summary: Biochar amendment in agroecosystems has the potential to mitigate greenhouse gas emissions and enhance multiple ecosystem services. This study investigated the effects of different biochar amendment rates on soil microbial communities and greenhouse gas emissions in intensive vegetable production in southern China. The results showed that biochar amendment significantly reduced N2O emissions, but had inconsistent effects on CH4 emissions. The recommended biochar amendment rate was 20 Mg ha-1 based on its lowest global warming potential and economic costs. These findings provide valuable insights for optimizing biochar amendment rates for greenhouse gas mitigation in agricultural production in China.
APPLIED SOIL ECOLOGY
(2023)
Article
Plant Sciences
Lisbeth D. R. Henriksen, Mette B. Larsen, Trine J. Johnsen, Soren E. Larsen, Tenna Riis, Annette Baattrup-Pedersen
Summary: The decline in biodiversity in freshwater ecosystems is a global concern. In Denmark, historical records show that several species within the plant genus Potamogeton, which were once widespread in Danish freshwater ecosystems, are now experiencing severe decline. This study examines root development in different Potamogeton species and finds that common species exhibit faster and more abundant root growth compared to declining species.
Article
Soil Science
Leonor Rodrigues, Alice Budai, Lars Elsgaard, Brieuc Hardy, Sonja G. Keel, Claudio Mondini, Cesar Plaza, Jens Leifeld
Summary: Biochar is a carbon-rich material produced from biomass through pyrolysis. It has been suggested as an effective long-term option to sequester CO2 for climate change mitigation. However, there is no universally applicable approach to measure its carbon sequestration efficiency. Guidelines on biochar quality have been developed to ensure its safe environmental use in agriculture. The hydrogen-to-organic C ratio is an important quality criterion widely used as a proxy for biochar stability.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2023)
Article
Environmental Sciences
C. K. Nielsen, L. Elsgaard, U. Jorgensen, P. E. Laerke
Summary: This study investigates the impact of site-specific soil-geochemistry on greenhouse gas emissions in drained and rewetted peatlands. The results show that rewetting can reduce emissions, especially carbon dioxide, from peatlands. Soil pH, phosphorus level, and water holding capacity are significant factors influencing the emission magnitudes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Alena Holzknecht, Orjan Berglund, Magnus Land, Jacynthe Dessureault-Rompre, Lars Elsgaard, Kristiina Lang
Summary: This article describes a systematic review methodology to answer the question of whether ley production or perennial green fallow can be suggested as a valid alternative to annual cropping to decrease greenhouse gas emissions on organic soils in temperate and boreal climate.
ENVIRONMENTAL EVIDENCE
(2023)
Article
Ecology
Julian Koch, Lars Elsgaard, Mogens H. Greve, Steen Gyldenkaerne, Cecilie Hermansen, Gregor Levin, Shubiao Wu, Simon Stisen
Summary: The substantial climate change mitigation potential of restoring peatlands through rewetting and intensifying agriculture to reduce greenhouse gas (GHG) emissions is largely recognized. The green deal in Denmark aims at restoring 100 000 ha of peatlands by 2030. Recent advances established the functional relationship between hydrological regimes, i.e., water table depth (WTD), and CO(2 )and CH(4 )emissions. We lay the foundation of developing a high-resolution WTD map for Danish peatlands and derive a national GHG emission estimate for peat soils. The estimated annual GHG emissions are 2.6 MtCO(2)-eq, which is around 15 % lower than previous estimates. Alternative restoration scenarios and the prioritization of fields in the rewetting strategy significantly influence the GHG reduction potential.
Article
Soil Science
Stamatios Thomopoulos, Lars Elsgaard, Lars Juhl Munkholm, Sabine Ravnskov
Summary: This study investigated the correlation between different fractions of glomalin-related soil protein (GRSP) and fatty acid fractions in soil, as well as the impact of conservation agriculture practices on arbuscular mycorrhizal fungi (AMF) biomass and GRSP content. The results showed a positive correlation between easily extractable (EE) GRSP and phospholipid fatty acid (PLFA) 16:1 omega 5, indicating the complexity of GRSP dynamics and the need for further research. Additionally, mechanical soil management had a greater impact on AMF biomass and EE-GRSP compared to residue management, suggesting that tillage practices exert a stronger influence on AMF abundance and GRSP content than residue management.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Ecology
Alexander M. Cancelli, Frank A. P. C. Gobas
Summary: A mechanistic model was developed to assess the removal efficiency of pollutants in a wetland system, particularly in oil sands process-affected water (OSPW). The model simulated wetland mechanisms of chemical removal and showed that sustained wetland treatment is feasible. It is a helpful tool to evaluate the feasibility of treatment systems and to assess trade-offs in wetland design and operation.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Prakash Singh Thapa, Hiromu Daimaru, Seiji Yanai
Summary: This study assessed the vegetation recovery and erosion condition in a landslide area in central Japan. The results show that the upper slope, where reforestation activities were implemented, has seen significant vegetation recovery and no significant erosion, while the lower slope lacks vegetation and has experienced continued erosion.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Mike Jerauld, Forrest Dierberg, Thomas DeBusk, Scott Jackson, Kevin Grace, John Juston
Summary: The Everglades Stormwater Treatment Areas (STAs) are constructed wetlands built to remove phosphorus (P) from agricultural and urban runoff in support of Everglades restoration. Research shows that the levels of calcium (Ca) and alkalinity (Alk) have an impact on phosphorus removal in these wetlands.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Kalindhi Larios, Stefan Gerber, Rafael Munoz-Carpena, Patrick Inglett, K. Ramesh Reddy, Michael Chimney
Summary: This study modeled the phosphorus biogeochemical dynamics in one of the best performing Everglades treatment wetlands and found that the complexity of the hydrological system significantly affected the simulated water column P concentration. The modeling tool developed in this study can guide future data collection and optimization efforts for treatment wetlands in the Everglades.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Jing Hu, Benjamin Baiser, R. Thomas James, K. Ramesh Reddy
Summary: This study examined the long-term phosphorus retention in Stormwater Treatment Areas (STAs) and identified the factors influencing their performance. The results showed that the operational performance of STAs improved over time. There were notable differences among individual STAs, with the co-precipitation of phosphorus with calcium playing a critical role in one of the STAs. This highlights the complexity of phosphorus removal in STAs and the need for site-specific management strategies.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Odi Villapando, K. R. Reddy, J. King
Summary: The biogeochemical response to different flow conditions within two parallel flow-ways in Everglades Stormwater Treatment Area (STA)-2 was studied. It was found that there was a gradual decrease in the total phosphorus (TP) concentration from inflow to outflow for both emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV) dominated systems, with EAV showing a higher reduction rate. Significant increase in TP concentration was observed in the SAV system under no flow condition, possibly due to the production of particulate phosphorus (PP) through various mechanisms.
ECOLOGICAL ENGINEERING
(2024)
