Article
Microbiology
Ryan S. Wagner, Katelyn M. McKindles, George S. Bullerjahn
Summary: In this study, it was found that a certain fungal parasite (chytrid) can infect Planktothrix agardhii algae, leading to a high prevalence of harmful algal blooms. Further investigation revealed that water temperature and flow have a significant impact on this infection. Decreased water flow promotes parasite infection, while increased water flow reduces infection. This study has important implications for controlling harmful algal blooms.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Osiris Diaz-Torres, Jose de Anda, Ofelia Yadira Lugo-Melchor, Adriana Pacheco, Danielle A. Orozco-Nunnelly, Harvey Shear, Carolina Senes-Guerrero, Misael Sebastian Gradilla-Hernandez
Summary: Lake Cajititlan in western Mexico is a small subtropical lake plagued by eutrophication due to untreated sewage discharges and excessive agricultural activities. The phytoplankton community in the lake undergoes significant changes during the rainy season, dominated by cyanobacteria. Rapid fluctuations in water quality and oxygen levels due to climatic variations may contribute to fish mortality in the lake.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Environmental Sciences
Brandon M. Jarvis, James D. Hagy III, Wilson Melendez, Cody W. Simmons, Yongshan Wan
Summary: Hypoxia, caused by excessive nitrogen and phosphorus, is common in coastal waterbodies. This study focused on diel-cycling hypoxia in shallow and highly productive estuaries, using continuous monitoring data and simulation models. The results showed consistent low oxygen conditions and significant vertical gradients in near bottom dissolved oxygen, demonstrating the need for detailed measurements and accurate simulation models in understanding oxygen dynamics in shallow estuaries.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Wen Hu, Chun-hua Li, Chun Ye, Hong-sen Chen, Jun Xu, Xu-hui Dong, Xiao-shou Liu, Deliang Li
Summary: This study used Lake Datong in Hunan Province, China as an example to investigate the effects of aquaculture. It was found that the lake's water quality deteriorated and became moderately eutrophic since the introduction of aquaculture in the 1980s. The lake underwent four stages of eutrophication succession, and after comprehensive management, consumer biomass decreased and submerged macrophyte biomass increased, resulting in reduced energy transfer efficiency.
ENVIRONMENTAL SCIENCES EUROPE
(2022)
Article
Marine & Freshwater Biology
Eric Bollinger, Jochen P. Zubrod, Marco Konschak, Ralf Schulz, Mirco Bundschuh
Summary: Stable isotope analysis is an important technique in food web ecology, but its effectiveness can be unclear in complex systems. The use of heavy isotope tracers has been suggested as a way to enhance the utility of stable isotope analysis, but this study found that labeling could potentially affect isotopic fractionation and bias conclusions. While the physiological and activity levels of organisms in autotrophy-based and detritus-based aquatic food webs were not significantly affected by labeling, the study supported the isotopic redundancy hypothesis, which suggests that metabolic processes can be altered by discrete quantum mechanical states.
AQUATIC TOXICOLOGY
(2023)
Article
Ecology
Peng Gu, Zhaochang Zhang, Jing Liu, Tao Wang, Yunxing Xiao, YangJinzhi Yu, Hengfeng Miao, Yumiao Zhang, Fei Liao, Kunlun Yang, Qi Li
Summary: There is limited research on the impact of small hydropower stations on aquatic biodiversity. This study investigated the abundance of different organisms in the watersheds of 15 small hydropower stations in Qionglai City. The results showed that these stations had a significant but varied impact on plankton, benthic animals, fish, and microorganisms, with fish being the most affected.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Plant Sciences
Qijuan Cheng, Liangfang Li, Xuhui Dong, Yan Li, Giri Kattel
Summary: This study reconstructed the succession of aquatic macrophytes in Huanggai Lake over the past century using aquatic plant macrofossils and discussed the driving mechanisms for their evolution. The results have important implications for lake management and restoration of degraded lakes exposed to severe anthropogenic impacts.
Article
Environmental Sciences
Chao Guo, Wei Li, Shiqi Li, Zhan Mai, Tanglin Zhang, Jiashou Liu, Adam G. Hansen, Lin Li, Xingwei Cai, Brendan J. Hicks
Summary: Fish community manipulation plays a crucial role in restoring submerged aquatic vegetation in shallow lakes of the middle and lower Yangtze River Basin. In-situ fish exclusion experiments and large-scale lake manipulations demonstrated that removal of benthivorous and herbivorous fish can significantly increase SAV coverage and biomass, as well as improve water quality. This study highlights the importance of considering fish community manipulation alongside nutrient reduction when restoring SAV in shallow lakes.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
C. H. A. van Leeuwen, J. J. de Leeuw, J. J. J. Volwater, O. A. van Keeken, H. Jin, A. M. Drost, D. Waasdorp, E. Reichman, L. Ursem, E. S. Bakker
Summary: Current rates of habitat loss require science-based predictions on how to restore or newly create lost habitat types. In aquatic ecosystems, littoral zones are key habitats for food web functioning, but they are often replaced by unnatural steep shorelines for water safety. To reverse this trend, knowledge is needed on how to successfully (re)create littoral zones. We quantified the response of an aquatic food web to the large-scale creation of new heterogeneous littoral habitats in shallow lake Markermeer, the Netherlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Food Science & Technology
Shanshan Zhao, Haijin Liu, Mengjie Qie, Jiukai Zhang, Liqin Tan, Yan Zhao
Summary: Stable isotope abundance, as a natural fingerprint of food growing environment, has attracted great attention in tracing and adulterating analysis of animal products. In recent years, the combination of stable isotope ratio analysis and other methods has become a promising approach for ensuring the authenticity and traceability of animal products.
FOOD REVIEWS INTERNATIONAL
(2023)
Article
Environmental Sciences
Shin-ichiro S. Matsuzaki, Atsushi Tanaka, Ayato Kohzu, Kenta Suzuki, Kazuhiro Komatsu, Ryuichiro Shinohara, Megumi Nakagawa, Seiichi Nohara, Ryuhei Ueno, Kiyoshi Satake, Seiji Hayashi
Summary: The remobilization of radiocesium from anoxic sediments in shallow lakes could be influenced by seasonal changes in bottom oxygen levels, and the remobilized radiocesium may impact fish activity. The study suggests that remobilized radiocesium may affect the seasonal dynamics of radiocesium in fish through food-chain transfer in shallow lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Plant Sciences
Marc-Andre Cormier, Jean-Baptiste Berard, Gael Bougaran, Clive N. Trueman, Daniel J. Mayor, Richard S. Lampitt, Nicholas J. Kruger, Kevin J. Flynn, Rosalind E. M. Rickaby
Summary: The traditional separation between primary producers and consumers in the marine food web is being replaced by the paradigm of mixoplankton, which are planktonic protists capable of both heterotrophy and autotrophy. This shift in understanding has implications for primary production, biomass transfer, and CO2 sequestration in the deep ocean. However, there is currently no tool to quantify the relative contributions of autotrophy and heterotrophy in planktonic protists, hindering our understanding of carbon cycling in marine ecosystems. This study explores the use of hydrogen isotopic signature of lipid biomarkers as a novel tool to investigate the prevalence of mixotrophy in marine microorganisms.
Article
Engineering, Environmental
Zhongyi Zhang, Wen-Xiong Wang, Nengjian Zheng, Yansheng Cao, Hongwei Xiao, Renguo Zhu, Hui Guan, Huayun Xiao
Summary: This study investigated the relationship between MeHg and cysteine in aquatic food webs in Poyang Lake, China, using CSIA-AA and MeHg measurements. Results showed a significant positive correlation between MeHg and cysteine, suggesting the potential role of MeHg-cysteine complex in MeHg bioaccumulation. The study contributes to the understanding of MeHg trophic transfer at the molecular level.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geosciences, Multidisciplinary
Jiawei Jiang, Hu Liu, Qingfeng Jiang, Yuan-Pin Chang, Mu Song, Bowen Meng, Huanye Wang, Yunning Cao, Ji Shen, Sergey Krivonogov, Weiguo Liu, Zhonghui Liu
Summary: Research has shown that meltwater played a significant role in the water budget of lakes in Central Asia and monsoonal Asia during the early Holocene, accompanied by climate warming. This has important implications for hydrological reconstructions and future hydroclimatic projections.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Chengrong Bai, Guang Gao, Xiangming Tang, Keqiang Shao, Yang Hu, Jiangbao Xia, Jingtao Liu
Summary: Eutrophication can lead to the degradation of lake habitats, resulting in changes in the diversity and potential function patterns of bacterioplankton communities. Environmental factors and stochastic processes play important roles in shaping the bacterial diversity patterns in different aquatic habitats.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Qingyue Shen, Kazuya Shimizu, Hanchen Miao, Shinya Tsukino, Motoo Utsumi, Zhongfang Lei, Zhenya Zhang, Osamu Nishimura, Yasuhiro Asada, Naoshi Fujimoto, Hirokazu Takanashi, Michihiro Akiba
Summary: Elevated nitrogen concentration can promote chlorophyll a production while inhibiting geosmin synthesis in Dolichospermum smithii NIES-824. The majority of geosmin is retained intracellularly, and the expression of geosmin synthase gene (geoA) is constitutive but decreases at higher nitrogen concentration. The transcription of geoA is closely related to cell activity and isoprenoid productivity, suggesting a regulatory mechanism in geosmin production.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Correction
Environmental Sciences
Gissela Pascual, Daisuke Sano, Takashi Sakamaki, Osamu Nishimura
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Qingyue Shen, Qian Wang, Hanchen Miao, Marie Shimada, Motoo Utsumi, Zhongfang Lei, Zhenya Zhang, Osamu Nishimura, Yasuhiro Asada, Naoshi Fujimoto, Hirokazu Takanashi, Michihiro Akiba, Kazuya Shimizu
Summary: This study investigated the effect of temperature on geosmin and 2-MIB production in two cyanobacterial species. Results showed that different temperatures influenced the Chl-a content and geosmin/2-MIB concentration, with gene expression levels also varying among temperatures.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Xiaoguang Xu, Ruijie Shi, Chengxu Lv, Huazu Liu, Wei Yang, Shenhua Qian, Megumu Fujibayashi, Yue Zhi, Guoxiang Wang, Munehiro Nomura, Osamu Nishimura, Wei Li
Summary: The composition and distribution of sediment organic matter (SOM) vary with grain size and hydrodynamic conditions. Bacteria are dominant in smaller fractions, microalgae are present in smaller and medium fractions, aquatic plants are evenly distributed among all sizes, and terrestrial plants are mainly found in larger fractions. The hydrodynamic forces impact the grain size of sediments and drive the gradient distribution of SOM sources.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Fisheries
Takashi Sakamaki, Yizhe Zheng, Yuji Hatakeyama, Megumu Fujibayashi, Osamu Nishimura
Summary: Proper evaluations of productivity and environmental impacts are essential for sustainable bivalve aquaculture in coastal marine systems. Estimation of organic matter budgets using one-box models provides a useful approach for understanding the interactions between aquaculture and the environment. However, interpretations are influenced by the spatial scale of assessments, as aquaculture facilities and ecosystems are spatially heterogeneous.
Article
Environmental Sciences
Gissela Pascual, Daisuke Sano, Takashi Sakamaki, Michihiro Akiba, Osamu Nishimura
Summary: The joint effect of temperature and pH on copper toxicity to microalgae was investigated in this study. The results showed that high temperature and pH increased the toxicity of copper to microalgae. Furthermore, the study suggested a higher risk of copper in cold seasons.
Article
Plant Sciences
Chaoxu Wang, Shasha Du, Osamu Nishimura
Summary: The study found that biochar significantly inhibited N2O emission from acidic arable soil fertilized with nitrogen fertilizers, mainly by blocking the reduction of NO3- by biochar during denitrification. Additionally, biochar also promoted the mineralization of soil DOC, resulting in carbon limitation during denitrification, which prevented NO3- reduction and suppressed N2O emission.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Microbiology
Syun-suke Kadoya, Syun-ichi Urayama, Takuro Nunoura, Miho Hirai, Yoshihiro Takaki, Masaaki Kitajima, Toyoko Nakagomi, Osamu Nakagomi, Satoshi Okabe, Osamu Nishimura, Daisuke Sano
Summary: RNA virus populations are diverse and their genetic diversity is critical for survival under environmental stresses. This study found that the genetic diversity of the outer capsid protein gene is associated with disinfection sensitivity, which changes stochastically. Prevention measures that reduce intrapopulation genetic diversity are important in preventing the spread and evolution of pathogenic RNA viruses.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Xian Cao, Yali Yuan, Sirapat Khodseewong, Osamu Nishimura, Hui Wang, Xianning Li
Summary: A coupled system consisting of a double-anode microbial fuel cell (MFC) unit and a biofilm electrode reactor (BER) was used to degrade azo dye reactive brilliant red X-3B. The MFC preliminarily degraded X-3B while generating electricity, and the BER obtained electrons from the MFC to continue degrading pollutants. The coupling system showed a significantly higher removal efficiency of X-3B compared to the control.
Article
Environmental Sciences
Hanchen Miao, Ji Zhang, Qingyue Shen, Satoshi Ichise, Yasuhiro Asada, Yuan Tian, Motoo Utsumi, Zhongfang Lei, Zhenya Zhang, Hirokazu Takanashi, Naoshi Fujimoto, Osamu Nishimura, Michihiro Akiba, Kazuya Shimizu
Summary: The study developed PCR and qPCR-based assays to effectively monitor geosmin-producing cyanobacteria in water bodies. The whole-cell PCR and qPCR analysis can accurately assess the abundance of musty odor-producers and predict the onset of musty odor events. These methods are of great importance in ensuring good water quality.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Xinxin Peng, Wei Yang, Qiu Jin, Shihua Su, Pan Guo, Ming Li, Huazu Liu, Wei Li
Summary: In this study, a near-natural system called BCT system was used to treat rural sewage for irrigation into farmland. The system consisted of a simple biofilter, constructed wetland, and trophic biology pond. The results showed that the BCT system had high removal efficiencies for carbon and nutrients, and it was resistant to temperature shock. The effluent from the system met the agricultural irrigation standards, demonstrating its effectiveness in sewage treatment and agricultural irrigation in rural areas.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Qiu Jin, Huazu Liu, Xiaoguang Xu, Li Zhao, Liangang Chen, Liming Chen, Ruijie Shi, Wei Li
Summary: The application of reservoirs in the upper reaches of rivers affects the hydrological rhythm of river-connected wetlands, leading to changes in wetland vegetation distribution. Different vegetation types have varying carbon and nitrogen sequestration and emission potentials, resulting in dynamic greenhouse gas emissions from wetlands during different hydrological periods. A study conducted in a wetland connected to the Yangzi River in China utilized remote sensing to identify changes in vegetation and water areas, and measured in-situ parameters such as water level, greenhouse gas fluxes, and soil carbon and nitrogen functional bacteria. Results showed that flooding period increased the area of Phragmites zone by 28.2%, while the areas of Carex and Phalaris zones decreased by 42.9%. Phragmites zone had the highest carbon and nitrogen accumulation in the soil, while Phalaris zone had the lowest. Greenhouse gas emissions, particularly CH4 and N2O, were positively correlated with water level and reached their maximum during flooding period. Flooding promoted the activities of denitrifying and methanogenic bacteria, leading to increased greenhouse gas emissions. It is suggested that water conservancy operations should consider regulating carbon and nitrogen sequestration to mitigate greenhouse gas emissions from river-connected wetlands.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Marine & Freshwater Biology
Wei Yang, Qian Tan, Shenhua Qian, Yuyue Huang, Elvis Genbo Xu, Xizi Long, Wei Li
Summary: Natural infochemicals, such as DMSP, may promote the trophic transfer of microplastics in freshwater ecosystems via olfactory traps.
AQUATIC TOXICOLOGY
(2023)
Article
Fisheries
Ji Zhang, Qingyue Shen, Hanchen Miao, Qintong Li, Marie Shimada, Tian Yuan, Motoo Utsumi, Zhongfang Lei, Zhenya Zhang, Hirokazu Takanashi, Naoshi Fujimoto, Satoshi Ichise, Yasuhiro Asada, Osamu Nishimura, Michihiro Akiba, Kazuya Shimizu
Summary: This study developed whole-cell PCR and whole-cell qPCR assays for rapid detection and quantification of 2-MIB-producing cyanobacteria, providing a valuable tool for prediction of taste and odor events in drinking water and freshwater fishery.
TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Engineering, Environmental
Syun-suke Kadoya, Osamu Nishimura, Hiroyuki Kato, Daisuke Sano
Summary: Models were established to project virus log reduction values using ozone, with water quality and operational parameters as explanatory variables. Machine learning algorithms were used, showing different prediction performances for different viruses, but overall robustness of the models.
Article
Biodiversity Conservation
Yongcui Lan, Jinliang Wang, Qianwei Liu, Fang Liu, Lanfang Liu, Jie Li, Mengjia Luo
Summary: This study focuses on the five major plateau lake basins in central Yunnan, China, and constructs an ecological security pattern using the source-resistance surface-corridor-pinch point framework. The study simulates land use/cover change in the region and identifies early warning regions where future urban expansion poses a threat to current ecological source areas and corridors.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Pingping Huang, Feng Zhao, Bailing Zhou, Kuidong Xu
Summary: This study investigates the distribution of benthic microeukaryotes in the China Seas and finds that they can stride over the ecological barrier of 32 degrees N. The study also highlights the significant influence of depth, temperature, and latitude on communities in the China Seas.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Federico Morelli, Yanina Benedetti, Jesse Stanford, Leszek Jerzak, Piotr Tryjanowski, Paolo Perna, Riccardo Santolini
Summary: Species distribution models (SDMs) are numerical tools used for predicting species' spatial distribution. This study found that ecological characteristics, such as habitat specialization, play a role in improving the accuracy of SDMs.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Xiaoxuan Wu, Hang Liu, Wei Liu
Summary: Global climate change, urbanization, and economic development have increased the need for sustainable human development, urban ecological governance, and low-carbon energy transformation. This study analyzes the green ecological transition in Chengdu based on panel data from 2010 to 2020, exploring its spatiotemporal evolution and key factors. The results show an overall upward trend in Chengdu's green ecological development and positive spatial autocorrelation in certain districts.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Castaldi Simona, Formicola Nicola, Mastrocicco Micol, Morales Rodriguez Carmen, Morelli Raffaella, Prodorutti Daniele, Vannini Andrea, Zanzotti Roberto
Summary: Sustainable agricultural practices are increasingly important for global and national environmental policies and economy. This study compared the sustainability of grape production under integrated and organic management using multiple indicators. The results showed that organic management was more beneficial for most environmental aspects of the agroecosystem compared to integrated management, without affecting grape yield.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Gaia Vaglio Laurin, Alexander Cotrina-Sanchez, Luca Belelli-Marchesini, Enrico Tomelleri, Giovanna Battipaglia, Claudia Cocozza, Francesco Niccoli, Jerzy Piotr Kabala, Damiano Gianelle, Loris Vescovo, Luca Da Ros, Riccardo Valentini
Summary: Phenology monitoring is important for understanding forest functioning and climate impacts. This research compares the phenological behavior of European beech forests using Tree-Talker (TT+) and Sentinel 2 satellite data. The study finds differences in the information derived by the two sensor types, particularly in terms of season length, phenology changepoints, and leaf period variability. TT+ with its higher temporal resolution demonstrates precision in capturing the phenological changepoints, especially when satellite image availability is limited.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Huanhuan Pan, Ziqiang Du, Zhitao Wu, Hong Zhang, Keming Ma
Summary: The land use and cover changes resulting from coal mining activities and ecological restoration have had a significant impact on ecosystem services in mining areas. This study investigates the relationship between ecosystem services and land use intensity in coal mining areas, emphasizing the importance of understanding this interdependence for balanced human-land system development. The research examines the evolving relationship across different reclamation stages in Shanxi, China, using a coupling coordination degree model. The findings suggest the need for timely and judicious reclamation of coalfields, considering the land's bearing capacity.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Jingjuan He, Yijun Shi, Lihua Xu, Zhangwei Lu, Mao Feng
Summary: This study examines the spatial interplay between changes in the blue-green spatial distribution and modifications in land surface temperature grades in Shanghai. The findings reveal that the transformation of the blue-green spatial pattern differs between different sectors of the city, and the impact on the thermal environment varies spatially.
ECOLOGICAL INDICATORS
(2024)
Article
Biodiversity Conservation
Yi Xu, Di Zhang, Junqiang Lin, Qidong Peng, Xiaohui Lei, Tiantian Jin, Jia Wang, Ruifang Yuan
Summary: This study analyzed the response relationship between phytoplankton growth and water environmental parameters in the Middle Route of the South-to-North Water Diversion Project in China using long-term monitoring data and machine learning models. The results revealed the differences between monitoring sites and identified the key parameters that affect phytoplankton growth.
ECOLOGICAL INDICATORS
(2024)