scholarly journals Decomposition characteristics of vegetation litter of Suaeda salsa and Spartina alterniflora in saltmarsh of the Yellow River Estuary, China

2020 ◽  
Vol 35 (2) ◽  
pp. 480
Author(s):  
WANG Fang-fang ◽  
YAN Jia-guo ◽  
MA Xu ◽  
QIU Dong-dong ◽  
CUI Bao-shan
Keyword(s):  
Spartina Alterniflora ◽  
Yellow River ◽  
River Estuary ◽  
Yellow River Estuary ◽  
Suaeda Salsa ◽  
The Yellow River

scholarly journals Effects of sediment burial disturbance on seedling survival and growth of Suaeda salsa in the tidal wetland of the Yellow River estuary

2010 ◽  
Vol 337 (1-2) ◽  
pp. 457-468 ◽  
Author(s):  
Zhigao Sun ◽  
Xiaojie Mou ◽  
Guanghui Lin ◽  
Lingling Wang ◽  
Hongli Song ◽  
...  
Keyword(s):  
Yellow River ◽  
Seedling Survival ◽  
River Estuary ◽  
Yellow River Estuary ◽  
Suaeda Salsa ◽  
The Yellow River ◽  
Tidal Wetland ◽  
Survival And Growth ◽  
Sediment Burial

Effects of the Water-Sediment Regulation Scheme (WSRS) on the expansion of Spartina alterniflora at the Yellow River Estuary, China

2021 ◽  
Author(s):  
Dongdong Shao
Keyword(s):  
Spartina Alterniflora ◽  
Landscape Metrics ◽  
Yellow River ◽  
River Estuary ◽  
Yellow River Estuary ◽  
The Yellow River ◽  
Mean Flow ◽  
Estuarine Ecosystem ◽  
Regulation Scheme ◽  
Significant Difference

<p>In recent decades, the invasion of saltmarsh plant Spartina alterniflora (S. alterniflora) over a large part of coastal wetlands in China, including the Yellow River Estuary (YRE) as a regional economic hub and global ecosystem services hotspot, has caused increasing concern because of its serious threats to native ecosystems. During the same period, local authorities have implemented a Water-Sediment Regulation Scheme (WSRS) in the Yellow River for flood mitigation and delta restoration purposes. The altered hydrological regime has resulted in unintended changes to estuarine ecosystem. However, the direct consequence of the WSRS on the expansion of S. alterniflora remains unclear. In this study, quantitative relationship between the inter- and intra-annual expansion patterns of S. alterniflora represented by relevant landscape metrics and indicators that quantify the concurrent variations of river and sediment discharges as the proxy of the WSRS impacts were analysed over the period of Year 2011 to 2018, and the analyses were performed on the YRE as a whole and on five different zones subdivided based on the invasion sequence. The results showed that there was no significant difference in the inter-annual area variation of S. alterniflora between the years with and without WSRS. Compared with the years without WSRS (2016-2017), the intra-annual (monthly) increment of the various landscape metrics (i.e. NP (number of patches), CA (class area), LPI (largest patch index) and AI (aggregation index)) were found to be significantly higher in the initial stage of peak growing season (June-July) than in the mid- and late stages (July-September) in the years with WSRS (2011-2015, 2018) in the subregion located close to the south bank of YRE as the most prominent impact zone. In addition, F (mean flow), Ff (number of high flow pulses), Tf (Julian date of maximum flow) and D (duration of WSRS) were identified as the explanatory variables for the intra-annual vegetation landscape pattern changes, and their relative contributions to resultant changes were also assessed. Our results broaden the understanding of estuarine hydrological disturbance as a potential driver regulating the saltmarsh vegetation, and also have implications for S. alterniflora invasion control at estuaries under changing environment.</p>

scholarly journals Soil As Levels and Bioaccumulation inSuaeda salsaandPhragmites australisWetlands of the Yellow River Estuary, China

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Junjing Wang ◽  
Junhong Bai ◽  
Zhaoqin Gao ◽  
Qiongqiong Lu ◽  
Qingqing Zhao
Keyword(s):  
Phragmites Australis ◽  
Yellow River ◽  
River Estuary ◽  
Translocation Factor ◽  
Contamination Factor ◽  
Yellow River Estuary ◽  
Suaeda Salsa ◽  
The Yellow River ◽  
Soil Sulfur ◽  
Main Factor

Little information is available on As contamination dynamics in the soil-plant systems of wetlands. Total arsenic (As) in soil and plant samples fromSuaeda salsaandPhragmites australiswetlands was measured in the Yellow River Estuary (YRE) in summer and autumn of 2007 to investigate the seasonal changes in As concentrations in different wetlands. The results showed that soil As levels greatly exceeded the global and regional background values. As levels in soil and the roots and stems of both types of plants were much higher in summer than in autumn, whereas leaf As showed higher level in autumn. Soil sulfur was the main factor influencing As levels inSuaeda salsawetlands, whereas soil porosity was the most important factor forPhragmites australiswetlands. The contamination factor (CF) showed moderately to considerably polluted levels of As in both wetland soils. Plant roots and leaves ofSuaeda salsahad higher As concentrations and biological concentration factors (BCFs) than stems, while the leaves and stems ofPhragmites australisshowed higher As levels and BCFs than roots. Compared toPhragmites australis,Suaeda salsagenerally showed higher translocation factor (TF), while TF values for both plant species were higher in summer than in autumn.

Sign in / Sign up

Export Citation Format

Share Document