Article
Agronomy
Shilpi Das, Weijin Wang, Steven Reeves, Ram C. Dalal, Yash P. Dang, Peter M. Kopittke
Summary: The combined use of lime and nitrification inhibitor (DMPP) was found to be effective in reducing N2O emissions from acid sugarcane soil.
Article
Soil Science
Louise Sennett, David L. Burton, Claudia Goyer, Bernie J. Zebarth
Summary: Chemical fumigation and biofumigation have different effects on soil nitrogen cycling, with chemical fumigation reducing the abundance of nitrifier and denitrifier genes, while biofumigation may decrease N2O emission pathways. Additionally, they also have differing impacts on the carbon cycle.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Environmental Sciences
Yu-Pin Lin, Andrianto Ansari, Rainer Ferdinand Wunderlich, Huu-Sheng Lur, Thanh Ngoc-Dan Cao, Hussnain Mukhtar
Summary: Understanding the niche segregation of AOA and AOB in ammonia oxidation and N2O production under different pH and temperature conditions is crucial for predicting N2O dynamics. Results showed that AOA and AOB occupied different niches for PAO, with soil temperature being a major determinant. N2O fluxes were higher in acidic conditions and lower in alkaline conditions, with a significant positive correlation between PAO and N2O fluxes.
Article
Agronomy
Ziyi Feng, Yongxiang Yu, Huaiying Yao, Chaorong Ge
Summary: This study found that the presence of ZnO nanoparticles can increase N2O emissions in soil, especially when coupled with C and N substrate amendments. The action of ZnO NPs promotes nitrification and denitrification processes, further impacting the functional genes associated with N2O emissions.
Article
Soil Science
Nadine Loick, Elizabeth Dixon, G. Peter Matthews, Christoph Mueller, Veronica S. Ciganda, Maria Lopez-Aizpun, Miguel A. Repullo, Laura M. Cardenas
Summary: This study quantifies the production and consumption pathways of N2O in soil using labelled substrate-N, showing the impact of different water filled pore space on N-transformation processes and emissions. The research highlights the importance of heterotrophic nitrification and denitrification in the N2O emissions, demonstrating the complex relationship between water filled pore space and nitrogen transformations.
Article
Agriculture, Multidisciplinary
P. R. Hargreaves, K. L. Baker, A. Graceson, S. A. F. Bonnett, B. C. Ball, J. M. Cloy
Summary: Grassland accounts for 70% of the global agricultural area, with N-fertilised grassland increasing productivity but also leading to higher emissions of the greenhouse gas nitrous oxide (N2O). Soil compaction can result in impeded water movement, favoring N2O production and emissions.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2021)
Article
Agronomy
Lu Zhang, Tusheng Ren, Jiwen Li, Kiya Adare, Nano Alemu Daba, Md Ashraful Alam, Shilin Wen, Huimin Zhang
Summary: This study investigates the impact of swine manure on red soil acidification and N2O emissions, and finds that partial replacement of chemical nitrogen with swine manure can effectively reduce N2O emissions and alleviate red soil acidification.
Article
Environmental Sciences
Anna M. Stefanowicz, Pawel Kapusta, Malgorzata Stanek, Kaja Rola, Szymon Zubek
Summary: This study compared the effects of herbaceous plant species on soil physicochemical and microbial properties in forest ecosystems, and found that herbaceous plants have a significant impact on soil microbial communities, but have less influence on soil chemical properties.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Soil Science
Zengming Chen, Ye Li, Yehong Xu, Shu Kee Lam, Longlong Xia, Nan Zhang, Michael J. Castellano, Weixin Ding
Summary: Nitrification inhibitors have shown effectiveness in reducing soil nitrous oxide and nitric oxide emissions from nitrogen-fertilized croplands, but their impact is limited during the spring thaw period, resulting in overall neutral effects for the whole year.
Review
Meteorology & Atmospheric Sciences
Shu-Yuan Pan, Kung-Hui He, Kuan-Ting Lin, Chihhao Fan, Chang-Tang Chang
Summary: This article provides an overview of international movements to reduce nitrogenous gas emissions from farmlands, summarizes the impact of agricultural management practices on nitrogen use efficiency for different crops, and evaluates their effect on nitrogenous gas emissions. The results indicate the importance of implementing site-specific sustainable management practices to improve nitrogen use efficiency and mitigate nitrogenous gas emissions. The article also highlights the need for systematic trade-off evaluations to maximize environmental benefits and maintain ecosystem services.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2022)
Article
Engineering, Environmental
Hiroshi Yamazaki, Ayaka Kagamu, Kenta Kezuka, Akito Murano, Yoshitaka Ebie
Summary: This study aimed to develop a method for estimating the amount of N2O generated from the nitrification of residual N compounds in treated sewage water. It was found that nitrification proceeded in the downstream direction in rivers following the discharge of the treated sewage water, thereby generating N2O. The N2O emission factor for in-river nitrification of NH4-N contained in the treated sewage water was calculated to be 0.0025 kgN(2)O-N kgNH(4)-N-(1).
WATER SCIENCE AND TECHNOLOGY
(2023)
Editorial Material
Environmental Sciences
B. D. Emmett
Summary: The study demonstrates the potential of a new technique - Nitrogen-Free Air Recirculation Method, to measure denitrification end-products in undisturbed soil cores, revealing unexpected denitrification hotspots at depth in the soil. Additionally, it highlights the importance of N-2 as the primary end-product of denitrification, accounting for over 86% of measured fluxes in all cores, which can enhance denitrification research and ecosystem model refinement.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Multidisciplinary Sciences
Flavia O. S. van Cleef, Jose C. B. Dubeux, Francine M. Ciriaco, Darren D. Henry, Martin Ruiz-Moreno, David M. Jaramillo, Liza Garcia, Erick R. S. Santos, Nicolas DiLorenzo, Joao M. B. Vendramini, Harley D. Naumann, Lynn E. Sollenberger
Summary: This study aimed to determine the emission of nitrous oxide, methane, and carbon dioxide, as well as the isotopic composition of nitrous oxide, from excreta of beef steers fed sericea lespedeza hay. Results showed that the peak emission of greenhouse gases occurred in the first days after urine or feces application, and feeding sericea lespedeza hay effectively mitigated the emission of greenhouse gases from the excreta.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Johannes Friedl, Clemens Scheer, Daniele De Rosa, Christoph Mueller, Peter R. Grace, David W. Rowlings
Summary: The study highlights that rainfall and irrigation can lead to large pulses of N2O emissions from intensively managed pastures, emphasizing the need to determine the magnitude and sources of N2O under such conditions. Different pathways of N2O production respond differently to wetting, with denitrification being the main pathway even at low water-filled pore space levels. Heterotrophic nitrification plays a significant role in N2O emissions, especially as wetting increases.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Xi Zhang, Junqian Zhang, Mengxin Song, Yubing Dong, Zhengqin Xiong
Summary: This study found that aged biochar can suppress N2O production through autotrophic nitrification and denitrification by regulating associated functional genes, but lab-aged biochar or fresh biochar have no effect. These findings have important implications for understanding the impact of biochar aging on N2O and NO mitigation in vegetable soils.
ENVIRONMENTAL POLLUTION
(2022)
Article
Biotechnology & Applied Microbiology
Andrew C. Eagar, Ryan M. Mushinski, Amber L. Horning, Kurt A. Smemo, Richard P. Phillips, Christopher B. Blackwood
Summary: Our study investigates how different mycorrhizal associations of temperate hardwood trees (i.e., arbuscular (AM) versus ectomycorrhizal (ECM) associations) influence soil fungal communities by altering the diversity and abundance of saprotrophic and plant-pathogenic fungi along natural gradients of mycorrhizal dominance. As temperate hardwood forests are predicted to become more AM dominant with climate change, examining soil communities along mycorrhizal gradients is crucial to understand how these global changes may affect future soil fungal communities and their functional potential. Our study, along with recent research, identifies possible global trends in the frequency of specific fungal functional groups responsible for nutrient cycling and plant-soil interactions in relation to mycorrhizal associations.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Biology
Kimberly Novick, Insu Jo, Loic D'Orangeville, Michael Benson, Tsun Fung Au, Mallory Barnes, Sander Denham, Songlin Fei, Kelly Heilman, Taehee Hwang, Tara Keyser, Justin Maxwell, Chelcy Miniat, Jason McLachlan, Neil Pederson, Lixin Wang, Jeffrey D. Wood, Richard P. Phillips
Summary: The oak species in eastern North America are declining in abundance, and whether or not they are drought tolerant depends on the metric of success. While oak trees sometimes have an advantage in gas exchange and growth, their vulnerability to hydraulic failure makes them just as or more likely to perish during drought than neighboring species.
Article
Ecology
Jason D. Fridley, Taryn L. Bauerle, Alaa Craddock, Alex R. Ebert, Douglas A. Frank, J. Mason Heberling, Elise D. Hinman, Insu Jo, Kelsey A. Martinez, Maria S. Smith, Lauren J. Woolhiser, Jingjing Yin
Summary: This study reveals that invasive species in the deciduous forests of North America possess a unique functional syndrome that gives them a competitive advantage over native species. The invaders exhibit a combination of high metabolic rate, robust leaves with longer lifespan, and a longer duration of annual carbon gain, which is made possible by their seasonally plastic xylem structure and rapid production of thin roots.
Article
Ecology
Guigang Lin, Matthew E. Craig, Insu Jo, Xugao Wang, De-Hui Zeng, Richard P. Phillips
Summary: This study investigated how soil acidity mediates nutrient cycling in forests dominated by arbuscular mycorrhizal (AM) trees and ectomycorrhizal (ECM) trees. The results showed that ECM-dominated forests were associated with greater soil acidity, reflecting differences in soil acid-base chemistry induced by mycorrhizal associations. These findings suggest that feedbacks between plant nutrient-use strategies and soil properties can impact forest community assembly and ecosystem processes on a global scale.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Ecology
Jonathan Knott, Grant Domke, Christopher Woodall, Brian Walters, Michael Jenkins, Songlin Fei
Summary: This study analyzed two decades of forest plot data in the Great Lakes region of the eastern U.S. and found that shifts in forest communities have important implications for carbon dynamics. The carbon content of live trees varied with different communities, while the carbon content of standing dead trees was influenced by community composition and stand structure.
Article
Entomology
Samuel F. Ward, Eckehard G. Brockerhoff, Rebecca M. Turner, Takehiko Yamanaka, Lorenzo Marini, Songlin Fei, Andrew M. Liebhold
Summary: The unintentional transport of insects beyond their native ranges has increased with globalization, leading to higher propagule pressure in non-native ranges. This study investigated the interceptions of European spruce bark beetle in the USA from 1914 to 2008 and found that interceptions were not related to outbreak levels in the native range, but were inversely related to annual import volume. The abundance of this beetle in invasion pathways has recently decreased, possibly due to strengthened phytosanitary protocols.
JOURNAL OF PEST SCIENCE
(2023)
Article
Environmental Sciences
Joshua Carpenter, Jinha Jung, Sungchan Oh, Brady Hardiman, Songlin Fei
Summary: Terrestrial laser scanners, unmanned aerial LiDAR, and unmanned aerial photogrammetry are increasingly being used for forest analysis and mapping. This paper introduces an unsupervised method for segmenting individual trees from point clouds. Testing on terrestrial-laser-scanned datasets and unmanned aerial photogrammetric and LiDAR point clouds shows that the proposed algorithm achieves state-of-the-art performances in individual tree segmentation and stem-mapping accuracy, regardless of forest complexity.
Article
Ecology
Jonathan A. Knott, Liang Liang, Jeffrey S. Dukes, Robert K. Swihart, Songlin Fei
Summary: In a 58-year common garden experiment, we tested the phenological sensitivity of northern red oak populations to temperature changes and whether these differences were associated with differences in productivity and survival. We found that spring leaf out consistently advanced in warmer years, but fall phenology was less responsive to temperature changes. Southern populations had larger shifts in phenology in response to springtime warming, but lower long-term survival. However, higher phenological sensitivity to spring warming was not strongly linked to increased productivity, and fitness was more closely linked to latitudinal gradients.
Article
Ecology
Qinfeng Guo, Anping Chen, Erin T. H. Crockett, Jeff W. Atkins, Xiongwen Chen, Songlin Fei
Summary: Gradient and scale are two key concepts in ecology and evolution that can jointly influence eco-evo patterns. While scale refers to the dimensional space of a specific issue, gradient measures the range of a variable. However, the role of changing gradients has received relatively little attention compared to changing scales. Evaluating the role of scale in ecological patterns should be done in conjunction with considering the underlying environmental gradients, as the difference between sampled and potential gradients can profoundly impact observed patterns and alter scale-gradient relationships.
Article
Plant Sciences
Dennis Heejoon Choi, Elizabeth A. A. LaRue, Jeff W. W. Atkins, Jane R. R. Foster, Jaclyn Hatala Matthes, Robert T. T. Fahey, Bina Thapa, Songlin Fei, Brady S. S. Hardiman
Summary: Moderate severity disturbances play a crucial role in ecosystem dynamics, but their effects on forest canopy structure and their changes over time are not well understood. This study used multi-temporal LiDAR data to examine the effects of three press disturbances and three pulse disturbances on temperate forest canopy structure. The research found that high intensity disturbances inhibited canopy height growth, while low intensity pulse disturbances facilitated it. Canopy complexity also mitigated the impact of disturbances on canopy structure over time.
JOURNAL OF ECOLOGY
(2023)
Article
Soil Science
Andrew C. Eagar, Kurt A. Smemo, Richard P. Phillips, Christopher B. Blackwood
Summary: Dominant tree mycorrhizal associations with the environment play a significant role in shaping belowground microbial communities and nutrient cycling. The interaction between mycorrhizal types and site location explains more variation in fungal community composition, richness, and function than specific soil properties. The relative abundance of plant pathogens is particularly responsive to tree mycorrhizal dominance, with increased presence around arbuscular mycorrhizal (AM) trees compared to ectomycorrhizal (ECM) trees.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Tian Zhou, Radhika Ravi, Yi-Chun Lin, Raja Manish, Songlin Fei, Ayman Habib
Summary: This paper investigates the use of LiDAR units onboard UAV and Backpack MMSs for high-quality point clouds in accurate forest inventory. By optimizing trajectory enhancement, the spatial accuracy of the point clouds can be significantly improved, and forest inventory metrics can be derived. The results demonstrate the effectiveness of the proposed strategy in improving the quality of the point clouds.
Article
Environmental Sciences
Gang Shao, Songlin Fei, Guofan Shao
Summary: Accurate tree inventory is important for sustainable forest planting and management. In this study, a stepwise tree detection approach was proposed, using horizontal point density and vertical structure profiles. The study demonstrated that horizontal point density provides critical information to locate individual trees, while vertical structure profiles can identify spreading branches and deliquescent crowns.
Article
Engineering, Environmental
Megan L. Purchase, Gary D. Bending, Ryan M. Mushinski
Summary: This study provides a unique investigation of NOy fluxes on a landscape scale, considering land-use types, human influence, and seasonality, to determine large-scale heterogeneity and provide a basis for future modeling and hypothesis generation. The study finds significant differences in functional potential and activity of nitrifying and denitrifying soil microbes linked to NOy emissions, and suggests that human influence is a more significant effector of soil NOy emissions than land-use type.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)