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
Shuai Fu, Shaoyan Zheng, Weilun Gao, Andong Wang, Xu Ma, Limin Sun, Tao Sun, Dongdong Shao
Summary: The study found serious issues with Spartina alterniflora invasion in the Yellow River Estuary, while the Water-Sediment Regulation Scheme had no significant impact on the expansion of Spartina. In years with the WSRS, the landscape metrics of Spartina showed higher monthly increments in the early growing season compared to late stages. Factors such as flow, high flow pulses, maximum flow date, and WSRS duration were identified as explanatory variables for intra-annual vegetation landscape changes.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Ecology
Shuai Shang, Shunxin Hu, Xiaoxue Liu, Yu Zang, Jun Chen, Ning Gao, Liangyu Li, Jun Wang, Longxiang Liu, Jikun Xu, Yumiao Zhang, Tao Wu, Xuexi Tang
Summary: The present study investigated the impact of the exotic plant Spartina alterniflora on coastal wetland soil bacterial communities. The results showed that soil bacterial richness increased after S. alterniflora invasion, with most changes occurring at the genus level. The relative abundances of certain bacteria were higher in invaded areas. PCA, RDA, and LEfSe analyses further demonstrated that S. alterniflora invasion significantly influenced both the bacterial community and physicochemical properties of wetland soil.
ECOLOGY AND EVOLUTION
(2022)
Article
Soil Science
Qiqiong Zhang, Zhongzheng Yan, Xiuzhen Li
Summary: In this study, differences in root iron plaque formation and the composition of Fe-oxidizing bacteria (IOB) and Fe-reducing bacteria (IRB) communities in the rhizosphere of Spartina alterniflora and Phragmites australis were compared. The results showed significant differences in iron plaque content and microbial diversity between the two plant species.
Article
Environmental Sciences
Xing Huang, Yitao Duan, Yuhua Tao, Xueping Wang, Haili Long, Changsheng Luo, Yufei Lai
Summary: The invasion of Spartina alterniflora has altered the carbon cycle process in coastal ecosystems, increasing soil organic carbon content and storage. The distribution and accumulation of soil organic carbon are mainly influenced by soil texture, bulk density, moisture content, total nitrogen, and total phosphorus. The organic carbon derived from Spartina alterniflora increases with invasion age, and plays a significant role in carbon sequestration in coastal wetland ecosystems.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Tian Xie, Qing Wang, Zhonghua Ning, Cong Chen, Baoshan Cui, Junhong Bai, Wei Shi, Bo Pang
Summary: The invasibility of an ecosystem measures its resistance to plant invasion, with human activities playing a key role in altering lateral hydrological connectivity and potentially making the ecosystem more susceptible to invasion.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Studies
Yufeng Sheng, Zhaoqing Luan, Dandan Yan, Jingtai Li, Siying Xie, Yao Liu, Li Chen, Min Li, Cuiling Wu
Summary: The rapid invasion of Spartina alterniflora poses a threat to the ability of coastal wetland soils to store carbon, nitrogen, and phosphorus. This study analyzed the spatial and temporal distribution characteristics of soil carbon, nitrogen, and phosphorus in a Spartina alterniflora wetland in Yancheng, China, during different invasion stages from 1995 to 2020. The results showed that the invasion of Spartina alterniflora increased soil carbon and nitrogen content and storage, while decreasing soil phosphorus content and storage. The changes in soil properties caused by the invasion indirectly affected the accumulation of soil carbon, nitrogen, and phosphorus in the wetland ecosystem.
Article
Environmental Sciences
Wenchao Ding, Wenxia Xie, Jianing Xu, Chunjing Liu, Ping Miao, Jian Gong
Summary: This study explores the source-sink characteristics of methyl halide (CH3X) in temperate coastal wetlands and identifies key factors affecting the variation of CH3X during the invasion of Spartina alterniflora. The results show that CH3X emissions exhibit seasonal and diurnal variations. S. alterniflora acts as a source of CH3X, with higher fluxes in the spring and autumn seasons. On the other hand, the bare flat area functions as a sink for CH3X, with maximum absorption flux occurring in summer. The biomass of S. alterniflora, particularly the leaves, significantly influences CH3X fluxes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Lei Wang, Jiahui Yuan, Yu Wang, Clayton R. Butterly, Deli Tong, Bo Zhou, Xiuzhen Li, Huabin Zhang
Summary: This study investigated the effects of plant invasion on soil microorganisms, phosphorus availability, and carbon chemistry in coastal wetlands. The results showed that invasive plants significantly altered soil phosphorus pools and affected soil carbon composition. Soil enzyme activity was also influenced by plant species, with a strong correlation between microbial community structure and soil phosphorus levels.
Article
Plant Sciences
Shidong Yue, Yi Zhou, Shaochun Xu, Xiaomei Zhang, Mingjie Liu, Yongliang Qiao, Ruiting Gu, Shuai Xu, Yu Zhang
Summary: The study highlighted the competitive effects of the exotic plant S. alterniflora on seagrass Z. japonica, with S. alterniflora invasion leading to inhibition of Z. japonica growth and significant increase in the distribution area of the invader. S. alterniflora primarily propagates via seeds and rhizomes, posing a threat to the population ecology of seagrass.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biodiversity Conservation
Jiakai Liu, Guoxin Yan, Yueyan Pan, Zhenming Zhang, Yinglong Chen, Mingxiang Zhang
Summary: Smooth cordgrass (Spartina alterniflora) introduced to China in 1970s for coastline stabilization threatens the habitat range of native Phragmites australis and has become more adaptive than P. australis. A study comparing their morphological and biomechanical responses to wave interference in the Yellow River Delta showed that P. australis was more sensitive to waves, exhibiting shorter individuals in wave zones but larger stem diameter and higher biomass. On the other hand, S. alterniflora did not show such variations. In wave zones, S. alterniflora invaded P. australis' habitat despite P. australis' higher stem-bending resistance, allocating excessive energy in stem growth while decreasing reproduction and fitness. Compared to none-wave zones, S. alterniflora allocated excessive energy in the stem to resist wind interference, making them less fitted than P. australis. Economic energy allocation to wave mechanical interference contributed to the successful invasion of S. alterniflora to landward in estuaries. S. alterniflora continued to expand landward in a semi-saline area, but community patterns may remain unchanged in areas with low salinity and high wave interference.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Zhigao Sun, Jie Wang, Bingbing Chen, Dangyu Zhang, Hua Wang
Summary: The siltation caused by Spartina alterniflora significantly impacted its decomposition rate and nutrient variations, particularly in terms of carbon, nitrogen, and phosphorus release.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Zhonghua Ning, Dongxue Li, Cong Chen, Chengjie Xie, Guogui Chen, Tian Xie, Qing Wang, Junhong Bai, Baoshan Cui
Summary: Understanding the dynamics and pathways of invasive plants in relation to geomorphic landscape features is crucial for predicting and managing their expansion in non-native habitats. In this study, the evolutionary patterns of tidal channel networks in the Yellow River Delta were quantified using remote-sensing imagery, and the invasion patterns of Spartina alterniflora were identified. The study also revealed the influence of tidal channel characteristics on the plant's invasion dynamics.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biodiversity Conservation
Xiao Xu, Shujuan Wei, Hongyang Chen, Bo Li, Ming Nie
Summary: The effects of Spartina alterniflora invasions on soil carbon content in coastal wetlands in China are not clear. This study found that S. alterniflora increased soil organic carbon content in salt marshes dominated by dwarf succulent species in the northern subtropics, but decreased carbon content in mangroves dominated by Kandelia obovata and mixed communities in the southern subtropics. The carbon content in S. alterniflora-invaded ecosystems increased only on a decadal scale and then decreased gradually.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Remote Sensing
Zhanpeng Wang, Yinghai Ke, Mengmeng Chen, Demin Zhou, Lin Zhu, Junhong Bai
Summary: Annual mapping of the Yellow River Delta wetland from 2008 to 2019 using time-series Landsat images revealed a significant expansion of Spartina alterniflora, encroaching on other vegetation types. The study found that the number of valid observations affects spatial and temporal classification accuracies, with harmonic regression features playing a crucial role in improving overall accuracies. Temporal distribution of observations was identified as more important than the quantity of observations for harmonic-based classification of coastal wetlands like the YRD.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2021)