Article
Geosciences, Multidisciplinary
Manuel Ruben, Jens Hefter, Florence Schubotz, Walter Geibert, Martin Butzin, Torben Gentz, Hendrik Grotheer, Matthias Forwick, Witold Szczucinski, Gesine Mollenhauer
Summary: Traditionally, rock-derived or petrogenic organic carbon has been considered non-bioavailable and not actively involved in the carbon cycle. However, recent studies suggest that this carbon may not be as inert as previously thought, especially in fjord systems with high influxes of petrogenic organic carbon, which could contribute to greenhouse gas emissions. The extent to which microorganisms utilize this organic carbon is not well understood, but it plays a significant role in the global carbon cycling. Radiocarbon analysis of intact polar lipid-fatty acids in marine sediments from Hornsund Fjord, Svalbard, revealed that bacterial communities in the area utilize 5 +/- 2% to 55 +/- 6% (average of 25 +/- 16%) of petrogenic organic carbon for biosynthesis after sediment redeposition. This suggests that the lack of recently synthesized organic carbon from primary production forces microorganisms to rely on petrogenic organic carbon as an alternative energy source, highlighting its importance in carbon cycling.
Article
Geosciences, Multidisciplinary
Manuel Ruben, Jens Hefter, Florence Schubotz, Walter Geibert, Martin Butzin, Torben Gentz, Hendrik Grotheer, Matthias Forwick, Witold Szczucinski, Gesine Mollenhauer
Summary: Despite being considered as having limited bioavailability, ancient rock-derived organic matter in Arctic fjord sediments is consumed by micro-organisms, potentially leading to greenhouse gas emissions.
Article
Biotechnology & Applied Microbiology
S. Vishnupriya, T. Jabir, K. P. Krishnan, A. A. Mohamed Hatha
Summary: Kongsfjorden, an Arctic fjord, is experiencing changes in bacterial community structure of sediments due to glacier melt and Atlantification driven by accelerated warming in the Arctic. The dominant phyla in the sediments are Proteobacteria, Bacteroidetes, and Epsilonbacteraeota, with alpha- and gamma-Proteobacteria class dominating in surface sediments and delta-Proteobacteria in subsurface sediments. Total organic carbon is suggested to be a major factor affecting bacterial diversity, and bacterial communities are predicted to be involved in the degradation of complex organic compounds and biosynthesis of secondary metabolites.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ju Hyeon Lee, Sae Yun Kwon, Hoin Lee, Seung-Il Nam, Jung-Hyun Kim, Young Ji Joo, Kwangchul Jang, Haryun Kim, Runsheng Yin
Summary: This study uses Hg isotopes to reconstruct changes in Hg sources in sediment cores from two Svalbard fjords during the Holocene. The results show measurable shifts in Hg sources at regional cooling and during the late Holocene Medieval Warm Period. The study suggests that Hg isotope ratios in sedimentary archives can be used to decipher climate and other changes modifying Hg sources in the Arctic.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Ian D. E. A. Lidbury, David J. Scanlan, Andrew R. J. Murphy, Joseph A. Christie-Oleza, Maria M. Aguilo-Ferretjans, Andrew Hitchcock, Tim J. Daniell
Summary: Phosphatase activity is inhibited by phosphate availability, however, the PafA phosphatase is highly active even in the absence of phosphate and plays a significant role in environmental phosphate regeneration.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Dahae Kim, Jung-Hyun Kim, Youngkyu Ahn, Kwangchul Jang, Ji Young Jung, Minji Bae, Seung-Il Nam
Summary: Svalbard fjords are recognized as hotspots for organic carbon (OC) burial and storage due to their high sedimentation rates. This study investigated sediment samples from Svalbard fjords and found significant contributions of petrogenic and aged soil-derived OC.
SCIENTIFIC REPORTS
(2023)
Article
Biotechnology & Applied Microbiology
T. Jabir, P. V. Vipindas, K. P. Krishnan, A. A. Mohamed Hatha
Summary: This study investigated the abundance and diversity of diazotrophs in Arctic fjord sediments, revealing dominance of δ-proteobacterial diazotrophs and significant correlations with TOC/TN ratio and total organic carbon content. Glacier runoff introducing low nitrogen content organic matter enhances the abundance and diversity of nitrogen-fixing microorganisms in the fjord sediments.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Yue Yin, Gaoyang Xu, Yuxing Xu, Mengyan Guo, Yihua Xiao, Tao Ma, Changqing Liu
Summary: The study optimized an effective polypyrrole modified red mud adsorbent for the removal of inorganic and organic phosphorus from aqueous solutions, showing good adsorption performance and mechanisms. Kinetic studies and experimental data confirmed the efficient adsorption capacity and mechanisms of the adsorbent.
Article
Environmental Sciences
P. V. Vipindas, T. Jabir, T. V. Rehitha, K. P. Krishnan
Summary: The study focused on the abundance, diversity, and niche separation of ammonia oxidizers in the surface sediment of two high Arctic fjords. The research revealed that AOA were more abundant than AOB, and the community composition of ammonia oxidizers showed spatial variations within and between the fjords, influenced by freshwater and soil influx from glacial melt.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Environmental Sciences
France Collard, Katrine Husum, Gauthier Eppe, Cedric Malherbe, Ingeborg G. Hallanger, Dmitry Divine, Geir W. Gabrielsen
Summary: Research on plastic pollution in the Arctic is limited, with this study focusing on microplastics and other anthropogenic particles like dyed fibers in sediments from Kongsfjorden. Analysis revealed the presence of various APs, including microplastics, with different sizes and distribution patterns. This data provides insight into the presence of plastic and other APs in a remote fjord in Svalbard.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Soil Science
Takashi Kunito, Shingo Haraguchi, Kiyoko Hanada, Kazuki Fujita, Hitoshi Moro, Kazunari Nagaoka, Shigeto Otsuka
Summary: This study analyzed the concentrations of phosphatase-hydrolyzable Po in different soil types and found that soil pH plays a significant role in the increase of phytate-like P and DNA-like P in 0.5 M NaHCO3-extracts.
Article
Soil Science
Yuhei Nakayama, Jordon Wade, Andrew J. Margenot
Summary: The study examines the relationships between P fractions and PME activity in different ecosystems, shedding light on the cycling characteristics of phosphorus in soil and providing insights into how soil P cycling determines P availability.
Article
Ecology
Dukki Han, Tim Richter-Heitmann, Il-Nam Kim, Eunjung Choy, Ki-Tae Park, Tatsuya Unno, Jungman Kim, Seung-Il Nam
Summary: Through a study of bacterial diversity and community composition in the seawaters of Kongsfjorden, Svalbard, we found distinct patterns in bacterial biogeography shaped by the influence of Atlantic inflow and glacial melting. Utilizing various indices, we assessed the phylogenetic diversity of bacterial communities and observed the impact of freshwater input from glacier melting on bacterial assemblage composition.
Article
Engineering, Environmental
Shuo-Nan Ma, Hai-Jun Wang, Hong-Zhu Wang, Miao Zhang, Yan Li, Shi-Jun Bian, Xiao-Min Liang, Martin Sondergaard, Erik Jeppesen
Summary: The experiment demonstrated that high nitrate concentrations have a dual effect on phosphorus release from sediments, with no impact on net phosphorus release at high nitrate levels, but significant release when nitrate addition is terminated. This indicates a dose-dependent effect of nitrate loading on stimulating phosphorus release, especially at concentrations exceeding 5-7 mg L-1.
Article
Agronomy
Hongmei Xing, Xuesong Luo, Xinghua Chen, Suren Deng, Hongmei Cai, Fangsen Xu, Lei Shi, Guangda Ding, Qiang Zhu, Chuang Wang
Summary: This study found that root-secreted acid phosphatases have a significant impact on the rhizobacterial community and function, and can regulate the potential of rhizosphere phosphorus cycling.
Article
Physics, Atomic, Molecular & Chemical
Wei Deng, Bin Zheng, Wei Ding, Hong Zhu, Hao-jun Liang
CHINESE JOURNAL OF CHEMICAL PHYSICS
(2015)
Article
Chemistry, Multidisciplinary
Wei Ding, Lin Hu, Zhigao Sheng, Jianming Dai, Xuebin Zhu, Xianwu Tang, Zhenzhen Hui, Yuping Sun
Article
Chemistry, Multidisciplinary
Wei Ding, Wei Deng, Hong Zhu, Haojun Liang
CHEMICAL COMMUNICATIONS
(2013)
Article
Chemistry, Physical
Wei Ding, Mengze Xu, Hong Zhu, Haojun Liang
EUROPEAN PHYSICAL JOURNAL E
(2013)
Article
Environmental Sciences
Renbin Zhu, Qingqing Chen, Wei Ding, Hua Xu
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2012)
Article
Multidisciplinary Sciences
Wei Deng, Huaguo Xu, Wei Ding, Haojun Liang
Article
Biodiversity Conservation
Dawei Ma, Renbin Zhu, Wei Ding, Congcong Shen, Haiyan Chu, Xiangui Lin
Article
Environmental Sciences
Renbin Zhu, Dawei Ma, Wei Ding, Bo Bai, Yashu Liu, Jianjun Sun
SCIENCE OF THE TOTAL ENVIRONMENT
(2011)
Article
Multidisciplinary Sciences
Renbin Zhu, Qing Wang, Wei Ding, Can Wang, Lijun Hou, Dawei Ma
SCIENTIFIC REPORTS
(2014)
Article
Chemistry, Analytical
Wei Ding, Renbin Zhu, Lijun Hou, Qing Wang
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2014)
Article
Chemistry, Multidisciplinary
Wei Ding, Lin Hu, Jianming Dai, Xianwu Tang, Renhuai Wei, Zhigao Sheng, Changhao Liang, Dingfu Shao, Wenhai Song, Qiannan Liu, Mingzhe Chen, Xiaoguang Zhu, Shulei Chou, Xuebin Zhu, Qianwang Chen, Yuping Sun, Shi Xue Dou
Article
Chemistry, Physical
Yanqiu Liu, Renhuai Wei, Wei Ding, Xin Wang, Wenhai Song, Zhigao Sheng, Jianming Dai, Changhao Liang, Xuebin Zhu, Yuping Sun
APPLIED SURFACE SCIENCE
(2019)
Article
Chemistry, Physical
Xin Wang, Wei Ding, Han Li, Hui Li, Shunjin Zhu, Xiaoguang Zhu, Jianming Dai, Zhigao Sheng, Hai Wang, Xuebin Zhu, Yuping Sun, Shi Xue Dou
JOURNAL OF MATERIALS CHEMISTRY A
(2019)