Article
Environmental Studies
Krista L. Noe, Christopher T. Rota, Mack W. Frantz, James T. Anderson
Summary: Wetland restoration is a common practice to offset the loss of natural wetlands due to human interference. While researchers often compare bird, amphibian, and reptile communities in restored and natural wetlands, they tend to overlook small mammals. However, small mammals play a crucial role in the ecosystem as seed dispersers and prey for larger wildlife. A study conducted in West Virginia, USA, found that restored wetlands provided sufficient habitat for small mammal communities, but the abundance of certain species differed between restored and natural wetlands.
Article
Limnology
Courtney Mobilian, Nathan I. Wisnoski, Jay T. Lennon, Merryl Alber, Sarah Widney, Christopher B. Craft
Summary: Tidal freshwater marshes are threatened by seawater intrusion, which can impact microbial communities and biogeochemical processes. A long-term field experiment showed that continuous seawater intrusion decreased microbial diversity, while episodic intrusion had no effect. Sulfate reducer abundance increased in response to both continuous and episodic intrusion. These findings suggest that continuous intrusion can lead to reduced bacterial diversity and diminished carbon cycling in ecosystems.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Ecology
Adrianne P. Smits, Luke C. Loken, Erwin E. Van Nieuwenhuyse, Matthew J. Young, Paul R. Stumpner, Leah E. K. Lenoch, Jon R. Burau, Randy A. Dahlgren, Tiffany Brown, Steven Sadro
Summary: Drivers of phytoplankton and zooplankton dynamics vary spatially and temporally in estuaries due to variation in hydrodynamic exchange and residence time. Abiotic drivers, such as water temperature, turbidity, and nutrients, explain more variation in phytoplankton and zooplankton dynamics than trophic interactions alone. However, individual phytoplankton-zooplankton interactions have a greater impact on variation than individual abiotic drivers. These interactions are strongest in areas with longer residence times and higher zooplankton biomass. The results highlight the importance of considering the hydrodynamic context when studying food web dynamics in estuaries.
ECOLOGICAL MONOGRAPHS
(2023)
Article
Microbiology
Fuchao Zheng, Tiange Zhang, Shenglai Yin, Ge Qin, Jun Chen, Jinghua Zhang, Dehua Zhao, Xin Leng, Shuqing An, Lu Xia
Summary: Imbalances between organic materials and nutrients have distinct effects on the structure and interactions of bacterial communities in restored wetlands. Higher COD/N values increase bacterial diversity and negatively correlate with N/P ratios. Bacterial beta diversity is negatively related to COD/N values, and the distribution of bacterial assemblages is mainly driven by variations in ammonia nitrogen and electrical conductivity.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Weiwei Song, Yi Li
Summary: This study investigated the ecological state of typical tidal flats along the eastern coast of China using field sampling, numerical simulation, and high-throughput sequencing. The findings revealed that the microbial communities in different subregions of the area exhibited notable differences due to variations in water quality and pollutant discharge. The study identified the impact of river pollutants on wetland microbial communities and established ecological patterns between the river and the sea, offering suggestions for watershed management and protection of coastal tidal flats.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Gwendoline M. David, Purificacion Lopez-Garcia, David Moreira, Benjamin Alric, Philippe Deschamps, Paola Bertolino, Gwendal Restoux, Emma Rochelle-Newall, Elisa Thebault, Marianne Simon, Ludwig Jardillier
Summary: Microbial communities in small freshwater ecosystems are mainly driven by environmental conditions, showing diversity and uniqueness in composition and structure. Despite geographical proximity, microbial communities in different ecosystems exhibit marked differences, with seasonal patterns observed in archaea, bacteria, and microbial eukaryotes. Interannual community assembly is influenced by biotic associations despite relatively stable environmental parameters over a 2-year period.
Article
Environmental Sciences
Laura Logozzo, Maria Tzortziou, Patrick Neale, J. Blake Clark
Summary: Research on the bioavailability and photoreactivity of CDOM exported from Chesapeake Bay tidal marshes found significant seasonal variations, with photochemistry playing a dominant role in decreasing CDOM molecular weight. Prior light exposure can enhance the bioavailability and photoreactivity of marsh-exported CDOM.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Microbiology
Xiaotian Zhou, Jay T. Lennon, Xiang Lu, Aidong Ruan
Summary: Dam construction has profound impacts on the structure, assembly, and stability of freshwater sediment microbiome, reflecting the ecological and biogeochemical ramifications of human-Earth system interactions. These findings are important for re-examining the formation of sediment microbial stratification.
Article
Ecology
Christine M. Cornish, Peter Bergholz, Kaycie Schmidt, Jon Sweetman
Summary: In this study, a microcosm experiment was conducted to examine the effects of glyphosate on benthic sediment microbial communities. The results showed that there were no significant differences in microbial community composition after glyphosate treatments, indicating a potential tolerance of microbial species to glyphosate exposure in the Prairie Pothole Region of North America.
Article
Marine & Freshwater Biology
Jonathan Dale, Heidi M. Burgess, Maureen J. Berg, Conor J. Strong, Niall G. Burnside
Summary: This study analyzed a non-engineered managed realignment site in Wales, finding that despite a decrease in topographic variability, the saltmarsh morphology became more complex over a four-year period, with sediment deposition rates between 3 and 7 cm/year. Suspended sediment concentration showed an inverse relationship with water depth, and subsurface geochemical composition reflected natural intertidal environments.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Engineering, Environmental
Zhenyan Zhang, Qi Zhang, Tao Lu, Jieyu Zhang, Liwei Sun, Baolan Hu, Jun Hu, Josep Penuelas, Lizhong Zhu, Haifeng Qian
Summary: Research shows that continuous low concentrations of chlorine treatment have negative effects on freshwater microbial communities, leading to decreases in community complexity and stability, with unaffected community diversity. Most ecological functions recover after chlorine treatment, but it also increases antibiotic resistance gene dissemination. The zebrafish intestinal microbial community recovers from temporary dysbiosis, but chlorine negatively impacts the growth and behavior of adult zebrafish.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Civil
Guozhu Chen, Junhong Bai, Junjing Wang, Zhe Liu, Baoshan Cui
Summary: This study conducted a simulated assessment to investigate the effects of groundwater table and salinity fluctuations on soil respiration in coastal wetlands. The results showed that tidal freshwater wetlands and salt marshes had higher soil respiration than brackish wetlands. The timing and magnitude of soil respiration were affected by groundwater table and salinity, with peak time occurring between 11 a.m. and 2 p.m. Soil respiration in tidal freshwater wetlands and brackish wetlands was significantly higher in deep and medium groundwater table treatments, as well as low and medium salinity treatments. However, soil respiration in salt marshes decreased significantly with increased groundwater table and salinity. Groundwater table and salinity had significant interactive effects on soil respiration in brackish wetlands and salt marshes. Soil respiration was negatively correlated with groundwater table and salinity in all three wetlands and positively correlated with microbial biomass carbon, soil organic carbon, and total nitrogen.
JOURNAL OF HYDROLOGY
(2022)
Article
Soil Science
Hayley Craig, Rachael E. Antwis, Irene Cordero, Deborah Ashworth, Clare H. Robinson, Todd Z. Osborne, Richard D. Bardgett, Jennifer K. Rowntree, Lorae T. Simpson
Summary: Nitrogen addition leads to significant changes in the structure and diversity of mangrove soil bacterial communities, as well as impacting microbial biomass and activity. Changes in nitrogen levels may alter the activity of enzymes involved in carbon, nitrogen, and phosphorus cycling, and increase the microbial metabolic quotient. These findings suggest potential implications for microbial communities and carbon and nutrient cycling in mangrove environments.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Environmental Sciences
Gabriel Nuto Nobrega, Pedro Avelino Maia de Andrade, Hermano Melo Queiroz, Arthur Prudencio de Araujo Pereira, Margareth da Silva Copertino, Daniel Gorman, Wen Zhuang, Jinming Song, Fernando Dini Andreote, Xose Luis Otero, Tiago Osorio Ferreira
Summary: This study evaluates the variability of soil biogeochemical processes in seagrass meadows along the Brazilian coast and its impact on archaea and bacteria communities. The results show that plants significantly influence the geochemical and microbiological communities of the soil, leading to different soil conditions and microbial communities.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Celine Lavergne, Polette Aguilar-Munoz, Natalia Calle, Frederic Thalasso, Maria Soledad Astorga-Espana, Armando Sepulveda-Jauregui, Karla Martinez-Cruz, Laure Gandois, Andres Mansilla, Rolando Chamy, Maialen Barret, Lea Cabrol
Summary: Freshwater ecosystems play a significant role in methane emissions and this study investigated the effects of temperature on microbial community structure and methane production pathways in sub-Antarctic lake sediments. The research found that temperature had a significant impact on methane production rates, particularly when methanogenic precursors such as acetate and H-2/CO2 were introduced.
ENVIRONMENT INTERNATIONAL
(2021)
