Article
Soil Science
Bin Wang, Xianbiao Lin
Summary: The wide and rapid invasion of Spartina alterniflora threatens the sustainability of coastal wetlands in China and negatively impacts sediment biogeochemical processes. This study investigated the effects of this invasive species on sediment nitrate reduction processes in mangrove wetlands. The results showed significant spatial differences in denitrification, dissimilatory nitrate reduction to ammonium, and their contributions among different plant communities. Spartina alterniflora invasion increased sediment nitrogen loss while reducing nitrogen retention in mangrove wetlands, posing a threat to their buffer function and nitrogen pools protection in estuarine and coastal ecosystems.
Article
Ecology
Wenwen Liu, Steven C. Pennings
Summary: This study explored the importance of plant species and different habitat conditions to synchrony in plant productivity across coastal marsh habitats in Georgia, USA. Synchrony was highest within a plant species and within a marsh zone, and decreased across species with increasing distance and elevational differences. Abiotic conditions, such as water column temperature and salinity, also showed high synchrony among sites, pointing to the Moran effect as a likely explanation for the findings.
Article
Biodiversity Conservation
Yuting Huang, Zhuo Liu, Guanghui Zheng, Chengyi Zhao
Summary: Spartina alterniflora, introduced into China in the 1980s, has had significant negative impacts on coastal wetlands by encroaching on native plant communities' habitat. The habitat of S. alterniflora expanded while the habitat of Suaeda salsa continuously fragmented. Habitat fragmentation and competition between S. alterniflora and Phragmites australis intensified, aggravating the reduction and fragmentation of S. salsa's habitat and threatening biodiversity and ecosystem stability.
ECOLOGICAL INDICATORS
(2022)
Article
Engineering, Marine
Niu Li, Ming Nie, Ming Wu, Jihua Wu
Summary: Invasive Spartina alterniflora significantly increased DNRA rates in both upper and deeper soil layers, contributing to N savings and potentially facilitating its own invasion. SO42-and pH regulated DNRA rates in different seasons in the soil.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Fangjuan Huang, Xianbiao Lin, Kedong Yin
Summary: Dissolved inorganic nitrogen (DIN) is high in the Pearl River Estuary (PRE), and nitrate (NOx-) removal processes play a crucial role in determining its export to coastal waters. By studying surface sediments, it was found that denitrification is the major removal process, and marine-produced organic matter is the primary driver for benthic NOx- removal processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Forestry
Maricar Aguilos, Ian Warr, Madison Irving, Olivia Gregg, Stanton Grady, Toby Peele, Asko Noormets, Ge Sun, Ning Liu, Steve McNulty, Forrest Pettay, Shamik Bhattacharya, Skylar Penney, Maccoy Kerrigan, Linqing Yang, Bhaskar Mitra, Prajaya Prajapati, Kevan Minick, John King
Summary: Coastal wetlands are important ecosystems that store a large amount of carbon and have high productivity. However, they are threatened by various natural and human disturbances. By studying a coastal forested wetland, we found that climate and hydrologic factors play a significant role in carbon fluxes and balance. Air temperature, net radiation, and groundwater table depth have a strong impact on gross primary productivity, ecosystem respiration, and net ecosystem carbon exchange.
Article
Marine & Freshwater Biology
Xuan Peng, Xiaoqing Yu, Xingyu Zhai, Xiaofei Gao, Zheng Yu, Jun Yang
Summary: The invasion of smooth cordgrass (Spartina alterniflora) in subtropical coastal region of China has a significant impact on ecosystem function and the ecological environment. However, there is limited knowledge about the fluctuation of different forms of nitrogen in cordgrass-invaded mangrove wetlands. This study compared the spatial and temporal distribution of different forms of nitrogen with and without S. alterniflora invasion in a coastal wetland in Fujian province, China. The results showed that nitrogen concentration in the wetland varied with intertidal vegetation type, season, and sampling location, with organic nitrogen being the dominant form in the mangrove zone.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Yukiko Senga, Tsubasa Sato, Kanae Shibaki, Megumi Kuroiwa, Seiichi Nohara, Yuichi Suwa
Summary: This study investigated the impact of macroalgae blooms on denitrification, anammox, and DNRA pathways in sediments. The results showed that anammox was insignificant during both macroalgae blooms and collapse. Denitrification rate was consistently higher than DNRA rate, with contributions of 82% and 85% at sites affected and unaffected by macroalgae, respectively. In sediment incubation experiments with macroalgae, DNRA contribution increased to approximately 30% on day 7.
Article
Environmental Sciences
Wenzhen Zhao, Xiuzhen Li, Liming Xue, Shiwei Lin, Yuxi Ma, Lin Su, Zeyuan Li, Lv Gong, Zhongzheng Yan, Peter I. Macreadie
Summary: Invasive Spartina alterniflora has become a global management challenge in coastal wetlands. China has decided to eradicate it completely, but concerns about the high costs and its provision of beneficial ecosystem functions have arisen. This study explores a reasonable pathway of S. alterniflora management that balances control of invasive species and ecosystem functions, providing a sustainable and flexible spatial strategy.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Microbiology
Zufan Zhang, Shiqing Nie, Yimeng Sang, Shuming Mo, Jinhui Li, Muhammad Kashif, Guijiao Su, Bing Yan, Chengjian Jiang
Summary: This study revealed the efficient nutrient cycling mechanism of mangroves and showed that the invasion of Spartina alterniflora enhanced the coupling effects of NF and PS processes, positively impacting sediment quality and turnover of nutrients. The research provides insights into the effects of S. alterniflora invasion on subtropical mangrove ecosystems and offers theoretical guidance for mangrove protection, restoration, and soil management, as well as potential development of marine biological fertilizers.
MICROBIOLOGY SPECTRUM
(2022)
Article
Environmental Sciences
Jianhui Bai, Fengting Yang, Mingjie Xu, Huimin Wang
Summary: An empirical model of respiration and net ecosystem productivity was developed and tested in a subtropical coniferous plantation in China, with reasonable agreement between simulation and observation results. The PAR energy method was applied to capture and describe the main energy interactions in CO2 processes, leading to the development of useful empirical models for gross primary production, respiration and net ecosystem productivity.
Article
Plant Sciences
Xiaotao Huang, Chunbo Chen, Buqing Yao, Zhen Ma, Huakun Zhou
Summary: This study estimated the carbon budget and response to grazing in Qinghai grasslands using a model, revealing spatiotemporal dynamics and regional differences. The results contribute to understanding the mechanism driving variation in grassland carbon budget and provide valuable data for local grassland management.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Soil Science
Xin Fang, Zhishu Yang, Jiangang Han
Summary: This study investigated the effects of different vegetation belts and seasonal changes on DNF, DNRA, and bacterial community structure in a coastal wetland. The results showed that DNRA was the dominant process in NO3- reduction in this wetland, and the DNRA/DNF ratios were positively correlated with soil NO3- concentrations.
APPLIED SOIL ECOLOGY
(2022)
Article
Biodiversity Conservation
Yanning Gao, Yujun Yi, Kebing Chen, Hongyi Xie
Summary: This study investigated the influence of water flow, sediment, and nutrients on vegetation in the Yellow River Estuary, and constructed a hydrodynamic water quality model to simulate the estuary's characteristics. The results showed that the Water and Sand Regulation Scheme had significant impacts on the suitable habitat and biomass of the studied vegetation.
ECOLOGICAL INDICATORS
(2023)
Article
Multidisciplinary Sciences
Constantin M. Zohner, Leila Mirzagholi, Susanne S. Renner, Lidong Mo, Dominic Rebindaine, Raymo Bucher, Daniel Palous, Yann Vitasse, Yongshuo H. Fu, Benjamin D. Stocker, Thomas W. Crowther
Summary: Climate change is altering the growing seasons of plants, affecting species performance and biogeochemical cycles. The timing of autumn leaf senescence in Northern Hemisphere forests is uncertain, but early-season and late-season warming have opposite effects on leaf senescence, with a reversal occurring after the summer solstice. Increased temperature and vegetation activity before the solstice led to an earlier senescence onset, while warmer post-solstice temperatures extended senescence duration. These changes in leaf senescence can impact growing-season length and forest productivity in the Northern Hemisphere.
Article
Plant Sciences
Jonathan G. Moser, Steven F. Oberbauer, Leonel Da S. L. Sternberg, Patrick Z. Ellsworth, Gregory Starr, Behzad Mortazavi, Paulo C. Olivas
AMERICAN JOURNAL OF BOTANY
(2016)
Article
Environmental Sciences
Jane M. Caffrey, James T. Hollibaugh, Behzad Mortazavi
MARINE POLLUTION BULLETIN
(2016)
Article
Engineering, Environmental
Sarra E. Hinshaw, Corianne Tatariw, Nikaela Flournoy, Alice Kleinhuizen, Caitlin Taylor, Patricia A. Sobecky, Behzad Mortazavi
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Multidisciplinary Sciences
J. Alberti, J. Cebrian, F. Alvarez, M. Escapa, K. S. Esquius, E. Fanjul, E. L. Sparks, B. Mortazavi, O. Iribarne
SCIENTIFIC REPORTS
(2017)
Article
Environmental Sciences
Alice A. Kleinhuizen, Behzad Mortazavi
ENVIRONMENTAL MANAGEMENT
(2018)
Article
Environmental Sciences
Rebecca J. Domangue, Behzad Mortazavi
ENVIRONMENTAL POLLUTION
(2018)
Review
Microbiology
Hidetoshi Urakawa, Suja Rajan, Megan E. Feeney, Patricia A. Sobecky, Behzad Mortazavi
ENVIRONMENTAL MICROBIOLOGY
(2019)
Article
Environmental Sciences
Corianne Tatariw, Nikaela Flournoy, Alice A. Kleinhuizen, Derek Tollette, Edward B. Overton, Patricia A. Sobecky, Behzad Mortazavi
ENVIRONMENTAL POLLUTION
(2018)
Article
Ecology
M. P. Jacquot, K. M. Dorgan, B. Mortazavi, A. A. Kleinhuizen, W. C. Clemo
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Environmental Sciences
Zachary L. Nickerson, Behzad Mortazavi, Carla L. Atkinson
Article
Ecology
Taylor C. Ledford, Behzad Mortazavi, Corianne Tatariw, Sommer F. Starr, Erin Smyth, Abigail Griffin Wood, Lorae T. Simpson, Julia A. Cherry
Summary: The study shows that wetland construction can help recover plant structure and some ecosystem functions, but the recovery of certain biogeochemical functions may take longer. Although marsh structure can recover relatively quickly after construction, there may be long-term lags in the recovery of ecosystem functions in constructed marshes.
RESTORATION ECOLOGY
(2021)
Article
Soil Science
S. F. Starr, B. Mortazavi, C. Tatariw, K. A. Kuehn, J. A. Cherry, T. Ledford, E. Smyth, A. Griffin Wood, S. E. Sebren
Summary: The study found that 30 years after the construction of salt marshes, the denitrification rates and fungal denitrification contribution in constructed salt marshes are lower than in natural salt marshes. Fungal biomass may limit the recovery of nitrogen removal in constructed salt marshes.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Alice A. Kleinhuizen, Rebecca J. Bernard, Behzad Mortazavi
CLEAN-SOIL AIR WATER
(2017)