Article
Environmental Sciences
Kelly L. Hondula, C. Nathan Jones, Margaret A. Palmer
Summary: Methane emissions from small freshwater ecosystems are a major uncertainty in the global methane budget. The study found that inundation extent and duration, as well as the direction of water level change, are major drivers of methane emissions in seasonally inundated forested wetlands. Modeling the hydrologic regime of these wetlands can lead to more accurate estimation of methane emissions.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Kuang-Yu Chang, William J. Riley, Sara H. Knox, Robert B. Jackson, Gavin McNicol, Benjamin Poulter, Mika Aurela, Dennis Baldocchi, Sheel Bansal, Gil Bohrer, David Campbell, Alessandro Cescatti, Housen Chu, Kyle B. Delwiche, Ankur R. Desai, Eugenie Euskirchen, Thomas Friborg, Mathias Goeckede, Manuel Helbig, Kyle S. Hemes, Takashi Hirano, Hiroki Iwata, Minseok Kang, Trevor Keenan, Ken W. Krauss, Annalea Lohila, Ivan Mammarella, Bhaskar Mitra, Akira Miyata, Mats B. Nilsson, Asko Noormets, Walter C. Oechel, Dario Papale, Matthias Peichl, Michele L. Reba, Janne Rinne, Benjamin R. K. Runkle, Youngryel Ryu, Torsten Sachs, Karina V. R. Schaefer, Hans Peter Schmid, Narasinha Shurpali, Oliver Sonnentag, Angela C. Tang, Margaret S. Torn, Carlo Trotta, Eeva-Stiina Tuittila, Masahito Ueyama, Rodrigo Vargas, Timo Vesala, Lisamarie Windham-Myers, Zhen Zhang, Donatella Zona
Summary: Studies show that methane emissions in wetlands are influenced by temperature and are more sensitive to it later in the frost-free season. To improve global methane budget assessments, more detailed measurements of factors influencing methane production are needed.
NATURE COMMUNICATIONS
(2021)
Article
Ecology
Antonio Cantu de Leija, Sammy L. King, Tracy S. Hawkins
Summary: The study evaluated the seed ecophysiology traits of three rare plants in the Southwestern United States, revealing the negative effects of increased salinity and anthropogenic activities on seed dormancy and germination.
JOURNAL OF ARID ENVIRONMENTS
(2022)
Article
Multidisciplinary Sciences
Carole Helfter, Mangaliso Gondwe, Michael Murray-Hudson, Anastacia Makati, Mark F. Lunt, Paul Palmer, Ute Skiba
Summary: Tropical wetlands are an important source of atmospheric methane, but their contribution to the global methane budget is uncertain. This study reveals that phenology, specifically vegetation cycles, controls the net methane emissions from a vegetated tropical swamp in the Okavango Delta. The study highlights the importance of including vegetative processes in methane emission budgets for wetlands.
NATURE COMMUNICATIONS
(2022)
Article
Forestry
Zoltan Batori, Laszlo Erdos, Mario Gajdacs, Karoly Barta, Zalan Tobak, Kata Frei, Csaba Tolgyesi
Summary: Microrefugia are small areas that support species persistence during regional and global climate changes, with dolines in karst landscapes potentially providing such areas. The study in the Mecsek Mts area of Hungary showed clear gradients of microclimatic factors within dolines, indicating significant changes after logging, suggesting logging may impact dolines to serve as microrefugia under global warming.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Environmental Sciences
Kazuhiko Terazawa, Takeshi Tokida, Tadashi Sakata, Kenji Yamada, Shigehiro Ishizuka
Summary: Stem methane emission from trees in forested wetlands is an overlooked pathway that plays a significant role in methane budgets. Environmental factors such as soil temperature and water-table depth influence the flux of stem methane seasonally and annually. Flooding can dramatically increase stem methane emission, and isotopic analysis shows fractionation along the emission pathway. Further research is needed to explore the mechanisms behind the control of stem methane emission by belowground environmental conditions.
Article
Engineering, Environmental
Lisanne Hendriks, Alfons J. P. Smolders, Thom van den Brink, Leon P. M. Lamers, Annelies J. Veraart
Summary: While there is abundant research on aquatic plants used in treatment wetlands, little is known about the use of plants in hydroponic ecological wastewater treatment and their impact on GHG emissions. This study focuses on the effectiveness of floating and submerged plants in removing nutrients and preventing GHG emissions from wastewater effluent. The results show that floating plants have higher nutrient removal efficiency and GHG uptake compared to submerged plants, making them a promising solution for climate-smart wastewater treatment.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaochen Yao, Changchun Song
Summary: The exacerbation of global warming has led to changes in wetland carbon emissions worldwide. Water level, temperature, and precipitation are important factors affecting CH4 and CO2 emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Kyohei Yokota
Summary: This study investigated the release of free carbon dioxide (H2CO3) from volcanic hot spring water into the atmosphere and its potential contribution to greenhouse gas concentration. The experiment identified factors such as the amount of hot spring water and the contact area with air that influenced the increase in CO2 concentration. The results showed that the implementation time, temperature, and humidity had no significant impact, while the amount of hot spring water played a role. The study suggests that harnessing the free carbon dioxide in hot spring water can be beneficial for facility horticulture and plant factories by manipulating water volume and increasing air-water contact area.
Article
Geosciences, Multidisciplinary
Junxiang Cheng, Ligang Xu, Jianghua Wu, Jiaxing Xu, Mingliang Jiang, Wenjuan Feng, Yuao Wang
Summary: This study investigates the effects of warming and nitrogen deposition on ecosystem respiration and methane emission in subtropical wetland ecosystems. The results show that these effects vary with seasons and tend to suppress carbon dioxide and methane emission in the short term.
Article
Multidisciplinary Sciences
Carole Helfter, Mangaliso Gondwe, Michael Murray-Hudson, Anastacia Makati, Ute Skiba
Summary: This article reports on three years of continuous monitoring of carbon dioxide (CO2) and methane (CH4) emissions in two wetland areas of the Okavango Delta, Botswana. The study found that the perennial swamp was a net source of carbon, while the seasonal floodplain was a carbon sink. Both ecosystems were sensitive to drought, with the seasonal floodplain experiencing larger gas emissions. This study highlights the importance of understanding the role of wetlands and their emissions in a changing climate.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Environmental Sciences
Hui Hua, Songyan Jiang, Zengwei Yuan, Xuewei Liu, You Zhang, Zican Cai
Summary: This study developed a framework to obtain multi-level greenhouse gas (GHG) emission factors (EFs) of municipal wastewater treatment plants (MWTPs) in China. The results showed significant differences in GHG EFs among different technologies and provinces, highlighting the importance of detailed technology classification and considering regional disparities. The study also tested the feasibility of the developed EFs and found similar estimation results, suggesting that selecting the appropriate EF based on activity data availability could simplify GHG estimations without sacrificing accuracy.
ENVIRONMENTAL POLLUTION
(2022)
Article
Ecology
Karen M. Foley, Karen H. Beard, Trisha B. Atwood, Bonnie G. Waring
Summary: Herbivory can have strong impacts on greenhouse gas fluxes in high-latitude ecosystems. Differences in trace gas fluxes between grazed and ungrazed areas may result both from herbivore-induced shifts in abiotic parameters and grazing-related alterations in microbial community structure.
Review
Agronomy
Petra Marschner
Summary: Submerged soils play a vital role in global biogeochemical cycles, with processes strongly influenced by oxygen availability (redox potential). These soils often have higher organic matter content than aerobic soils, and plants have complex effects on wetland soil processes, both beneficial and detrimental.
Article
Green & Sustainable Science & Technology
Andre Bolt, Ibrahim Dincer, Martin Agelin-Chaab
Summary: The article presents a new and unique multigeneration system design that extracts carbon dioxide from cement production to produce methane/natural gas. Hydrogen gas is generated through electrolysis supported by hydroelectric power, and a portion is used to produce methane. Other outputs include electricity, space heating, and hot water. The system also utilizes solar energy. The system achieved hydrogen and methane production rates of 0.01028 kgs-1 and 0.02045 kgs-1, respectively, with exergy and energy efficiencies of 44.5% and 77.5%.
JOURNAL OF CLEANER PRODUCTION
(2023)