Article
Ecology
Ricky Mwangada Mwanake, Gretchen Maria Gettel, Elizabeth Gachibu Wangari, Clarissa Glaser, Tobias Houska, Lutz Breuer, Klaus Butterbach-Bahl, Ralf Kiese
Summary: Anthropogenic activities significantly increase GHG emissions in inland waters, with land use being more influential than seasonality. Agriculture-dominated catchments and streams with wastewater inflows have much higher and more variable emissions of CO2, CH4, and N2O compared to forested streams. Nutrient, labile carbon, and dissolved GHG inputs from agricultural and settlement areas contribute to these hotspots and hot-moments of fluvial GHG emissions. The annual emissions from anthropogenic-influenced streams are up to 20 times higher than natural streams, primarily driven by CO2.
Article
Environmental Sciences
Audrey H. Goeckner, Mary G. Lusk, Alexander J. Reisinger, Jacob D. Hosen, Joseph M. Smoak
Summary: Observational study reveals that stormwater ponds can be net carbon sources and should be considered in regional and global carbon models.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Xiaoxia Bai, Cheng Cheng, Qiang Xu, Bingran Tang, Qiang He, Hong Li
Summary: Riparian zones are hot spots for greenhouse gas production, and the occurrence and decomposition of vegetation in these zones play a significant role in carbon mitigation. Harvesting vegetation biomass helps reduce carbon emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
J. Alan Roebuck Jr, Karen Prestegaard Jr, Christian Gaviria, Allison Myers-Pigg, Susan E. Ziegler
Summary: Understanding the controls on the delivery of dissolved organic matter (DOM) from terrestrial to aquatic systems is crucial for carbon balance and flux in boreal headwater catchments. This study investigated DOM in two morphologically distinct catchments of an experimental forest watershed in western Newfoundland, and found that geomorphological, hydrometeorological, and biogeochemical variability complexly affect the timing and magnitude of DOM delivery.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Studies
Muhammad Sadiq, Kavita Chavali, V. V. Ajith Kumar, Kuan-Ting Wang, Phong Thanh Nguyen, Thanh Quang Ngo
Summary: Asia has been grappling with high emissions and energy consumption issues, particularly in the past decade. Natural resource rents are a significant constraint that adversely affects environmental quality. This study explores the impact of COP26 commitments and non-renewable energy consumption on natural resource extraction, focusing on 10 Asian economies due to their high emissions and energy consumption. The findings indicate a positive association between carbon and methane emissions and natural resource rents, highlighting the negative relationship between COP26 environmental targets and natural resource rents. The study also emphasizes the need for strong policy implications to preserve the environment and natural resources for future generations, as fossil fuel energy consumption is positively associated with natural resource rents.
Article
Environmental Sciences
J. Alan Roebuck Jr, Karen Prestegaard Jr, Christian Gaviria, Allison Myers-Pigg, Susan E. Ziegler
Summary: Understanding the mechanisms controlling the delivery of dissolved organic matter (DOM) to aquatic systems is crucial for carbon balance and flux regulation in boreal catchments. This study compared DOM in two catchments with different morphologies in western Newfoundland and found that antecedent conditions play an important role in DOM delivery. Preferential flowpaths through shallow mineral horizons were identified as a key pathway for DOM delivery in the hillslope catchment, while near-stream wetlands were the main source in the low relief catchment. These findings highlight the complexity of DOM responses at the watershed scale and emphasize the need for better integration of catchment hydrology and landscape hydrobiogeochemistry in boreal landscapes.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Franklin Linam, Matt A. Limmer, Alina M. Ebling, Angelia L. Seyfferth
Summary: Rice agriculture plays a crucial role in feeding over half the world's population and paddy soils greatly impact the carbon cycle. This study explores the effects of different rice husk amendments on soil organic carbon levels, greenhouse gas emissions, and dissolved organic matter chemistry. The findings suggest that flooding and amendments of rice husk and biochar promote carbon storage in rice paddy soils, despite an increase in methane emissions. Water management has a stronger impact on dissolved organic matter chemistry than amendments. However, further investigation is needed in this area.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Limnology
Kelly S. Aho, Jennifer H. Fair, Jacob D. Hosen, Ethan D. Kyzivat, Laura A. Logozzo, Gerard Rocher-Ros, Lisa C. Weber, Byungman Yoon, Peter A. Raymond
Summary: This study examined the variations of CO2 and CH4 partial pressures in eight nested streams and rivers over four years, revealing the impact of concentrations and gas transfer velocities on CO2 and CH4 fluxes. The findings suggest that CO2 fluxes increase with discharge, while CH4 fluxes are modulated by the dynamics of gas transfer velocity and concentration.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Teresa K. Silverthorn, John S. Richardson
Summary: Studies on GHG fluxes in riparian zones of headwater streams are limited, but show that groundwater discharge areas may have lower soil moisture and different gas fluxes than non-discharge areas; soil temperature explains a significant portion of variation in CO2 and N2O fluxes, while soil moisture explains a portion of CH4 flux variation.
Article
Limnology
Svetlana A. Zabelina, Liudmila S. Shirokova, Sergey I. Klimov, Artem V. Chupakov, Artem G. Lim, Yuri M. Polishchuk, Vladimir Y. Polishchuk, Alexander N. Bogdanov, Ildar N. Muratov, Frederic Guerin, Jan Karlsson, Oleg S. Pokrovsky
Summary: This study reveals that greenhouse gas emissions from inland waters in subarctic regions of NE Europe, particularly in peatlands with permafrost, are still poorly quantified and studied. Large lakes dominate GHG emissions, while small thaw ponds contribute minimally to overall emissions.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Andrew L. Robison, Wilfred M. Wollheim, Clarice R. Perryman, Annie R. Cotter, Jessica E. Mackay, Ruth K. Varner, Paige Clarizia, Jessica G. Ernakovich
Summary: Inland waters, especially small streams, play a significant role in methane emissions to the atmosphere. This study investigates the emission pathways, microbial production and oxidation, and isotopic signature of methane in four lowland headwater streams. The findings suggest that diffusive emissions account for the majority of methane emissions in these streams, and methane oxidation is prevalent, depleting half of the dissolved methane pool. The study proposes a conceptual model of methane production, oxidation, and emission in small streams, highlighting their unique characteristics compared to other aquatic ecosystems.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Limnology
Gerard Rocher-Ros, Tamara K. Harms, Ryan A. Sponseller, Maria Vaisanen, Carl-Magnus Morth, Reiner Giesler
Summary: The study in two Arctic streams found that photosynthesis was the main factor influencing the diurnal variation of CO2 concentration, while ecosystem respiration rates were identified as the key process for CO2 production in Arctic streams. This suggests that future aquatic CO2 emissions may be dependent on how biotic processes respond to ongoing environmental changes.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Multidisciplinary Sciences
Dan Wang, Weili Ye, Guangxue Wu, Ruoqi Li, Yuru Guan, Wei Zhang, Junxia Wang, Yuli Shan, Klaus Hubacek
Summary: This study aims to construct a greenhouse gas (GHG) emission inventory for wastewater treatment plants (WWTPs) in China to support their emission reduction efforts. The inventory includes CH4, N2O, and CO2 emissions from different treatment processes, energy consumption, and effluent discharge, covering the period from 2006 to 2019.
Article
Geosciences, Multidisciplinary
Jesse Alan Roebuck, Kevin D. Bladon, David Donahue, Emily B. Graham, Samantha Grieger, Karl Morgenstern, Matthew J. Norwood, Katie A. Wampler, Lisa Erkert, Lupita Renteria, Robert Danczak, Susan Fricke, Allison N. Myers-Pigg
Summary: The warmer and drier climate has led to an increase in large, high severity wildfires in the Pacific Northwest, raising concerns about water quality and ecosystem recovery. This study quantified the spatiotemporal patterns of dissolved organic matter (DOM) chemistry in streams burned by wildfires in Oregon, USA in 2020. The results showed that the composition of DOM was temporally variable and linked with burn severity, suggesting distinct gradients of burn severity impact DOM dynamics immediately following fire activity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Cheng Hu, Junqing Zhang, Bing Qi, Rongguang Du, Xiaofei Xu, Haoyu Xiong, Huili Liu, Xinyue Ai, Yiyi Peng, Wei Xiao
Summary: Atmospheric CH4 is the second-largest anthropogenic contributor to global warming. However, its emissions, components, spatial-temporal variations, and projected changes still remain largely uncertain from city to national scales. Therefore, it is crucial to consider temperature-dependent EFs and the positive feedback between global warming and CH4 emissions in future CH4 emission projections and climate change models.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Water Resources
T. Yasmin, S. Dhesi, I. Kuznetsova, R. Cooper, S. Krause, I. Lynch
Summary: This study conducted an in-depth systematic review of literature to explore the context of water, sanitation and hygiene (WaSH) sustainability and resilience in refugee communities. The results indicate concerns about the lengthy waiting period for refugees to achieve repatriation/integration into host communities, which is often in the Global South. It emphasizes the need to understand the specific factors and interdependencies in each refugee camp, as 'one-size-fits-all' solutions may not be suitable for different camps.
INTERNATIONAL JOURNAL OF WATER RESOURCES DEVELOPMENT
(2023)
Article
Soil Science
Gianni Micucci, Fotis Sgouridis, Niall P. McNamara, Stefan Krause, Iseult Lynch, Felicity Roos, Reinhard Well, Sami Ullah
Summary: Denitrification in soil is a challenging process to quantify. The 15N Gas Flux method is a suitable technique for in situ measurement of denitrification, but it has limitations in sensitivity towards N2 emissions. This review explores the principles of the 15N Gas Flux method, assesses its assumptions, and discusses technical aspects for optimal application. The findings suggest that further research is needed to address the limitations and improve the accuracy of in situ denitrification measurement.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Anna Jaeger, Jonas L. Schaper, Paul Romeijn, Andrea Betterle, Malte Posselt, Stefan Krause, Joerg Lewandowski, Joakim Riml
Summary: Artificial tracers are often used for quantitative estimates of solute transport properties in rivers. However, this study used intrinsic diurnal fluctuations of electrical conductivity caused by discharge of treated wastewater as a tracer to evaluate solute transport processes along a river reach in Germany. The method is of high value for river management, as promoting transient storage benefits water quality.
WATER RESOURCES RESEARCH
(2023)
Editorial Material
Multidisciplinary Sciences
Richard S. Lampitt, Stephen Fletcher, Matthew Cole, Alice Kloker, Stefan Krause, Fran O'Hara, Peter Ryde, Mahua Saha, Anastasia Voronkova, Adrian Whyle
Summary: Progress in reducing plastic pollution has been slow, leading to increased damage to the environment and human health. The lack of integration among scientists, industry, society, and policymakers is the main reason. In the future, these stakeholders need to work together to address the issue.
NATURE COMMUNICATIONS
(2023)
Article
Soil Science
Fotis Sgouridis, Michaela Reay, Suparat Cotchim, Jiaojiao Ma, Aleksandar Radu, Sami Ullah
Summary: Forest ecosystems are important for absorbing anthropogenic atmospheric CO2, but this may be limited by soil nutrient supply. The response of soil N cycling in mature forests to changes in carbon availability and potential feedbacks of nitrous oxide emissions under elevated CO2 are uncertain. The BIFoR-FACE experiment found that soil gross N mineralisation and ammonium immobilisation increased under eCO2, while N2O emission from denitrification was significantly higher. The enhanced soil N transformation rates and N availability may support enhanced canopy CO2 uptake, but the overall implications for C sequestration and the manifestation of N limitation are still unclear.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Engineering, Environmental
Anna Kukkola, Robert L. Runkel, Uwe Schneidewind, Sheila F. Murphy, Liam Kelleher, Gregory H. Sambrook Smith, Holly Astrid Nel, Iseult Lynch, Stefan Krause
Summary: This study compares microplastic abundance in Boulder Creek (BC) and its less urbanized tributary South Boulder Creek (SBC) in Colorado, USA. The results show that microplastic concentrations and loads are higher in BC than in SBC, which is consistent with the differences in urbanization between the two catchments. The study also quantifies the removal of microplastics through flow diversions, which should be considered in large-scale models of plastic fate and transport to the oceans.
Article
Soil Science
Yafei Guo, Ernesto Saiz, Aleksandar Radu, Sameer Sonkusale, Sami Ullah
Summary: This study investigates the impact of PF and FD on GHG fluxes and nitrogen dynamics in arable and grassland soils in the UK, and identifies important tipping points in GHG emissions from different land use types.
Article
Environmental Sciences
Ben Christopher Howard, Ian Baker, Nicholas Kettridge, Sami Ullah, Stefan Krause
Summary: This study demonstrates the significant effects of wood on streambed biogeochemical cycling. The impact of instream wood on streambed biogeochemical activity is fundamental and should not be overlooked. Without considering the effects of instream wood, the representativeness of results may be reduced and the risks and opportunities of restoration programs may be overlooked.
Article
Ecology
Tahmina Yasmin, Megan A. Farrelly, Briony C. Rogers, Stefan Krause, Iseult Lynch
Summary: The paper discusses the growing call for adaptive governance approaches in urban water management systems and highlights the focus on evidence-based research in the Global North, while evidence from the Global South remains limited. The research conducted in two cities in Bangladesh examines how adaptive governance operates in different local contexts, and reveals that the larger urban system of Dhaka is currently experiencing lock-in due to various factors, while the smaller urban system of Mymensingh showcases enabling factors for sustainable growth. The study sheds light on the role of adaptive governance in relation to system scales, capacity, and key enabling attributes.
ECOLOGY AND SOCIETY
(2023)
Article
Geosciences, Multidisciplinary
Tahmina Yasmin, Kieran Khamis, Anthony Ross, Subir Sen, Anita Sharma, Debashish Sen, Sumit Sen, Wouter Buytaert, David M. Hannah
Summary: Floods in mountainous river catchments are causing increasing harm and require inclusive approaches to designing flood early warning systems. Rather than focusing solely on technology, the use of a SMART approach encourages engagement with local social and governance contexts to benefit the at-risk community. This approach integrates diverse backgrounds and identifies missing links to ensure inclusivity and good practice throughout the decision-making process.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2023)
Article
Environmental Sciences
Anna C. Ryan, Deonie Allen, Steve Allen, Vittorio Maselli, Amber LeBlanc, Liam Kelleher, Stefan Krause, Tony R. Walker, Mark Cohen
Summary: The study shows that North Atlantic hurricanes have an impact on the transport and deposition of ocean-sourced microplastics in the atmosphere. Hurricane Larry deposited substantial amounts of microplastic particles over Newfoundland, Canada in 2021.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Psychology, Biological
Katja Gehmlich, Stefan Krause
Summary: Most scientific prizes and medals are named after men and are predominantly awarded to men. Though a small number of awards named after women or not named after individuals are more frequently awarded to women, gender parity has not yet been achieved. We urge the scientific community to reconsider the naming, nomination, and selection criteria of academic awards, medals, and prizes, and to diversify awarding committees and procedures to ensure greater inclusivity.
NATURE HUMAN BEHAVIOUR
(2023)
Article
Environmental Sciences
Muhammad Abdullahi, Iestyn Stead, Sophie Bennett, Rafael Orozco, Mohamed Abou-Elwafa Abdallah, Sara Jabbari, Lynne E. Macaskie, Alexandra Tzella, Stefan Krause, Bushra Al -Duri, Robert G. Lee, Ben Herbert, Peter Thompson, Megan Schalkwyk, Samuel Getahun, Karl D. Dearn, Luisa Orsini
Summary: Urbanisation, population growth, and climate change have created pressure on water resources and led to a global water crisis, necessitating water reuse. However, water reuse is unsafe without removing persistent chemical pollutants. Existing technologies for reducing chemical pollutants in wastewater have high costs and potential toxic by-products. This article presents a scalable, low-cost, low-carbon, and retrofittable nature-inspired solution for removing persistent chemical pollutants from wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
George J. L. Wilson, Chuanhe Lu, Dan J. Lapworth, Arun Kumar, Ashok Ghosh, Vahid J. Niasar, Stefan Krause, David A. Polya, Daren C. Gooddy, Laura A. Richards
Summary: This study investigates the distribution of dissolved organic matter (DOM) in groundwater under the rapidly developing city of Patna, Bihar (India) and identifies the spatial and seasonal controls on its distribution. The composition of DOM in groundwater is found to be influenced by land use and monsoonal events, with evidence of ingress of wastewater-derived organic matter. The study highlights the importance of understanding groundwater DOM composition in various hydrogeochemical settings.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
