Article
Environmental Sciences
Hui Zhang, Fan Cheng, Siyu Sun, Zhengkui Li
Summary: The distribution and diversity of comammox microbial community in different ecosystems were investigated in this study, revealing higher abundance in summer and farmland soils. The study also found a negative correlation between the abundance of comammox A and pH and NH4+ concentration.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Yanqing He, Yuecheng She, Xin Qi, Hui Zhang, Wei Wang, Zhengkui Li
Summary: This study investigated the distribution and diversity of comammox Nitrospira in riparian wetland ecosystems around Taihu Lake. The results showed that the community structure of comammox Nitrospira exhibited spatial and temporal heterogeneity, and total carbon and pH were the main environmental factors driving niche differentiation between comammox Nitrospira and canonical nitrifiers. In conclusion, three ammonia oxidizers were widely distributed in riparian wetland ecosystems around Taihu Lake, with canonical nitrifiers being more competitive and comammox Nitrospira preferring oligotrophic conditions.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Environmental Sciences
Wenbin Xu, Mengxuan He, Weiqing Meng, Ying Zhang, Haofan Yun, Yalan Lu, Zhimei Huang, Xunqiang Mo, Beibei Hu, Baiqiao Liu, Hongyuan Li
Summary: Understanding the temporal and spatial pattern changes and driving factors behind ecosystem health in coastal regions is crucial for management and restoration. This study used the VORS model and marine ecosystem health index to diagnose the ecosystem health of the entire coastal area of China over the past 20 years, and identified the main contributing factors using geographic detectors and geographic weighted regression analysis. The findings reveal that the southern coastal region has a higher level of ecosystem health than the northern region, with significant changes observed in Bohai Bay, the Yangtze River Estuary, Hangzhou Bay, and the Pearl River Estuary. Both natural and human factors influence ecosystem health, but their impacts vary at different scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Public, Environmental & Occupational Health
Paul Rodrigues, Martine Hebert, Mathieu Philibert
Summary: This study evaluates the associations between neighborhood characteristics and dating violence among adolescents. The findings suggest that several neighborhood characteristics can influence the perpetration and victimization of different forms of dating violence. The effects vary depending on gender and spatial scale. Public policies should focus on improving neighborhood living conditions to reduce dating violence.
INTERNATIONAL JOURNAL OF HEALTH GEOGRAPHICS
(2022)
Article
Environmental Sciences
Philippe-Olivier Dumais, Cindy Grant, Bodil A. Bluhm, Laure De Montety, Lisa Treau de Coeli, Jean-Eric Tremblay, Philippe Archambault
Summary: This study evaluated benthic community composition in the Canadian Arctic Archipelago and developed spatial predictive explanatory models. The results showed a succession in benthic communities and their distribution was influenced by Pacific origin water and terrigenous inputs.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Soil Science
Amanda Muller, Eric G. Lamb, Steven D. Siciliano
Summary: This study investigates how subsurface SOC-rich patches in frost boils resulting from diapirism contribute to overall SOC storage in High Arctic polar semi-deserts. The presence of subsurface SOC patches nearly doubles the SOC content in frost boils. Although diapirism occurs in only 35% of all frost boils, these patches represent an important, yet heterogeneous, pool of SOC. The estimated SOC stored in the active layer of High Arctic polar semi-deserts is 8.14 +/- 0.45 Pg SOC.
Article
Engineering, Environmental
Maosheng Zheng, Zhichao Tian, Zimin Chai, Anqi Zhang, Ailu Gu, Guangli Mu, Dedong Wu, Jianhua Guo
Summary: The recent discovery of complete ammonia oxidation (comammox) bacteria has challenged the traditional understanding of nitrification. However, their importance in wastewater treatment plants (WWTPs) is still not well understood. This study found that comammox Nitrospira was present in all 25 WWTPs and even outnumbered other ammonia oxidizers. It was also confirmed that comammox Nitrospira actively participated in ammonia oxidation. These findings demonstrate the widespread occurrence and functional dominance of comammox in WWTPs.
Article
Engineering, Marine
Xiaoxia Cai, Yanpei Zhuang, Hongliang Li, Jing Xu, Haiyan Jin, Jianfang Chen
Summary: The optical properties of colored dissolved organic matter (CDOM) in the upper water of the western Arctic Ocean were studied. The study found a decoupling effect between CDOM concentration and biological productivity, and an increase in DOM molecular weight with salinity. Four fluorescent components were identified, with C3 and C4 components being associated with Pacific water inflow.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Ecology
Minglei Ren, Jianjun Wang
Summary: This study reconstructed 17 high-quality metagenome-assembled genomes of Nitrososphaeria from freshwater environments and compared them with marine genomes. The results showed that freshwater Nitrososphaeria were dominated by the family Nitrosopumilaceae and could be grouped into three distinct clades. There was also evidence of vertical niche separation between clades in deep lakes, and phylogenetic clustering patterns supported freshwater-to-marine and marine-to-freshwater transitions in Nitrosopumilaceae. Furthermore, the study revealed the genetic changes that accompanied these transitions.
Article
Environmental Sciences
Anne Corminboeuf, Jean-Carlos Montero-Serrano, Richard St-Louis
Summary: The study of marine and on-land sediment samples from the Canadian Arctic Archipelago revealed low concentrations of polycyclic aromatic hydrocarbons (PAHs), mainly originating from natural petrogenic sources and posing a low ecological risk.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Erin N. MacDonald, Suzanne E. Tank, Steven Kokelj, Duane G. Froese, Ryan H. S. Hutchins
Summary: This study used ultrahigh-resolution mass spectrometry to characterize DOM derived from different permafrost end-member types in the western Canadian Arctic, revealing significant variation in DOM composition among the permafrost end-member types. The unique compound characteristics of DOM from various permafrost end-member types are primarily influenced by the parent materials of the permafrost.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Astronomy & Astrophysics
Ginevra Favole, Benjamin R. Granett, Javier Silva Lafaurie, Domenico Sapone
Summary: The study investigates the jackknife method for internal covariance estimation in large-scale structure surveys, exploring the impact of jackknife size and number of resamplings on the precision of the covariance estimate and errors in cosmological parameters. Results show that the baryon acoustic scale error estimate is independent of the jackknife scale, while the shift parameter a exhibits variations in error estimates from different datasets.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Forestry
Kai Su, Hongjun Liu, Huiyuan Wang
Summary: This study analyzed the change characteristics of ecosystem pattern, quality, and dominant services in the Loess Plateau Ecological Screen (LPES) from 2005 to 2015. The results showed that the ecosystem structure was stable, but the quality improved. Soil erosion situation improved overall, with grassland and forest playing important roles in soil conservation.
Article
Physics, Multidisciplinary
Florian Hinzpeter, Filipe Tostevin, Alexander Buchner, Ulrich Gerland
Summary: Comparing catalyst arrangements in living systems reveals the need for different strategies in reaction- and diffusion-limited regimes. These systems across different length scales involve localized reactions and hindered diffusive transport, with the arrangement of catalysts playing a key role in determining the flux through the reaction pathway. Trade-offs arise between inter-catalyst transport efficiency and substrate depletion, as well as between steric confinement of intermediate products and accessibility of catalysts to substrate, influencing the design principles for catalyst arrangement.
Article
Environmental Sciences
Songyun Fan, Barry Lai, Evert J. Elzinga, Ellery D. Ingall, Peter L. Morton, Yuan Gao
Summary: The spatial variability of Fe mineralogy and oxidation states in aerosols collected during the US GEOTRACES Western Arctic cruise (GN01) were determined using synchrotron-based XANES spectroscopy. The results showed the presence of both Fe(II) minerals (biotite, ilmenite) and Fe(III) minerals (ferrihydrite, hematite, Fe(III) phosphate) in the samples. The observed aerosol Fe mineralogy and solubility varied spatially and could be grouped into three clusters based on the air masses that affected aerosols collected in different regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Essouassi Elikem, Brian D. Laird, Jordan G. Hamilton, Katherine J. Stewart, Steven D. Siciliano, Derek Peak
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2019)
Article
Environmental Sciences
Olukayode O. Jegede, Beverley A. Hale, Steven D. Siciliano
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2019)
Article
Ecology
Steven D. Mamet, Ellen Redlick, Michelle Brabant, Eric G. Lamb, Bobbi L. Helgason, Kevin Stanley, Steven D. Siciliano
Article
Environmental Sciences
Amy Gainer, Robyn Akre, Olugbenga J. Owojori, Steven D. Siciliano
Article
Environmental Sciences
Kobby Fred Awuah, Mark Cousins, Mathieu Renaud, Olukayode Jegede, Beverley Hale, Steven Douglas Siciliano
Article
Geochemistry & Geophysics
Jordan G. Hamilton, Jay Grosskleg, David Higer, Gurbir Singh Dhillon, Kris Bradshaw, Trevor Carlson, Steven D. Siciliano, Derek Peak
APPLIED GEOCHEMISTRY
(2019)
Article
Multidisciplinary Sciences
Aimee Schryer, Kris Bradshaw, Steven D. Siciliano
Article
Multidisciplinary Sciences
Mathieu Renaud, Mark Cousins, Kobby Fred Awuah, Olukayode Jegede, Beverley Hale, Jose Paulo Sousa, Steven Douglas Siciliano
Article
Microbiology
Zelalem M. Taye, Bobbi L. Helgason, Jennifer K. Bell, Charlotte E. Norris, Sally Vail, Stephen J. Robinson, Isobel A. P. Parkin, Melissa Arcand, Steven Mamet, Matthew G. Links, Tanner Dowhy, Steven Siciliano, Eric G. Lamb
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Environmental Sciences
Mitsuaki Ota, Steven D. Mamet, Amanda L. Muller, Eric G. Lamb, Gurbir Dhillon, Derek Peak, Steven D. Siciliano
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2020)
Article
Environmental Sciences
Hamzat O. Fajana, Olukayode O. Jegede, Kyle James, Natacha S. Hogan, Steven D. Siciliano
ENVIRONMENTAL POLLUTION
(2020)
Article
Multidisciplinary Sciences
Jennifer K. Bell, Steven D. Siciliano, Eric G. Lamb
Article
Environmental Sciences
Mohammad Nazrul Islam, Lidong Huang, Steven D. Siciliano
Article
Engineering, Environmental
Olukayode O. Jegede, Kobby F. Awuah, Mathieu J. Renaud, Mark Cousins, Beverley A. Hale, Steven D. Siciliano
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Multidisciplinary Sciences
Navid Bazghaleh, Steven D. Mamet, Jennifer K. Bell, Zayda Morales Moreira, Zelalem M. Taye, Shanay Williams, Melissa Arcand, Eric G. Lamb, Steve Shirtliffe, Sally Vail, Steven D. Siciliano, Bobbi Helgason