scholarly journals Evolutions of 30-Year Spatio-Temporal Distribution and Influencing Factors of Suaeda salsa in Bohai Bay, China

2021 ◽  
Vol 14 (1) ◽  
pp. 138
Author(s):  
Hongyan Yin ◽  
Yuanman Hu ◽  
Miao Liu ◽  
Chunlin Li ◽  
Yu Chang
Keyword(s):  
Influencing Factors ◽  
Coastal Wetlands ◽  
Yellow River ◽  
River Estuary ◽  
Google Earth ◽  
River Delta ◽  
Liaoning Province ◽  
Suaeda Salsa ◽  
Bohai Bay ◽  
Dynamic Changes

Suaeda salsa (L.) Pall. (S. salsa) acts as a pioneer species in coastal wetlands due to its high salt tolerance. It has significant biodiversity maintenance, socioeconomic values (e.g., tourism) due to its vibrant color, and carbon sequestration (blue carbon). Bohai bay region, the mainly distributed area of S. salsa, is an economic intensive region with the largest economic aggregate and population in northern China. The coastal wetland is one of the most vulnerable ecosystems with the urbanization and economic developments. S. salsa in Bohai Bay has been changed significantly due to several threats to its habitat in past decades. In this paper, we analyzed all available archived Landsat TM/ETM+/OLI images of the Bohai Bay region by using a decision tree algorithm method based on the Google Earth Engine (GEE) platform to generate annual maps of S. salsa from 1990 to 2020 at a 30-m spatial resolution. The temporal-spatial dynamic changes in S. salsa were studied by landscape metric analysis. The influencing factors of S. salsa changes were analyzed based on principal component analysis (PCA) and a logistic regression model (LRM). The results showed that S. salsa was mainly distributed in three regions: the Liao River Delta (Liaoning Province), Yellow River Delta (Shandong Province), and Hai River Estuary (Hebei Province, Tianjin). During the past 31 years, the total area of S. salsa has dramatically decreased from 692.93 km2 to 51.04 km2, which means that 92.63% of the area of S. salsa in the Bohai Bay region was lost. In the 641.89 km2 area of S. salsa that was lost, 348.80 km2 of this area was converted to other anthropic land use categories, while 293.09 km2 was degraded to bare land. The landscape fragmentation of S. salsa has gradually intensified since 1990. National Nature Reserves have played an important role in the restoration of suitable S. salsa habitats. The analysis results for the natural influencing factors indicated that precipitation, temperature, elevation, and distance to the coastline were considered to be the major influencing factors for S. salsa changes. The results are valuable for monitoring the dynamic changes of S. salsa and can be used as effective factors for the restoration of S. salsa in coastal wetlands.

Spatial Distribution of Phosphorus in Surface Soils of Wetlands with Different Plant Communities in the Yellow River Delta, China

2013 ◽  
Vol 726-731 ◽  
pp. 1383-1386
Author(s):  
Xiao Fei Ye ◽  
Jun Hong Bai ◽  
Qiong Qiong Lu ◽  
Qing Qing Zhao ◽  
Jun Jing Wang
Keyword(s):  
Spatial Distribution ◽  
Influencing Factors ◽  
Phragmites Australis ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Suaeda Salsa ◽  
The Yellow River ◽  
Distribution Characteristics ◽  
The Yellow River Delta

Spatial distribution characteristics of available phosphorus (AP) and total phosphorus (TP) in wetland soils withPhragmites australis,Suaeda salsaandTamarix chinnensiswere investigated and their influencing factors was also indentified using principal correspondence analysis for ordination in the Yellow River Delta of China. Our results showed that TP and AP contents in both sites withPhragmites australisandSuaeda salsa, and the horizontal distributions of AP content in three sites exhibited similar distribution characteristics to that of AP:TP ratios. Additionally, soil properties such as soil moisture, salinity, total nitrogen, total carbon and pH values were the important influencing factors of higher spatial variability of AP and TP.

scholarly journals Screening for Salt Tolerance in Eight Halophyte Species from Yellow River Delta at the Two Initial Growth Stages

ISRN Agronomy ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Liu Xianzhao ◽  
Wang Chunzhi ◽  
Su Qing
Keyword(s):  
Salt Tolerance ◽  
Yellow River ◽  
Germination Rate ◽  
Yellow River Delta ◽  
River Delta ◽  
Suaeda Salsa ◽  
Growth Stages ◽  
Initial Growth ◽  
Sesbania Cannabina ◽  
Tamarix Chinensis

Screening of available local halophytes for salinity tolerance is of considerable economic value for the utilization of heavy salt-affected lands in coastal tidal-flat areas and other saline areas. In this study, the germination and seedling pot experiments on salt tolerance of eight halophytic species from Yellow River Delta, China, at seven NaCl concentrations (0, 50, 100, 150, 200, 250, and 300 mM), were conducted at both growth stages. Results showed that germination rate and germination index decreased with an increase in NaCl concentration. The higher germination rates were obtained from Tamarix chinensis and Suaeda salsa seeds exposed to 0~200 mM NaCl. At the seedling stage, the salt tolerances of eight halophytes were also different from each other. Tamarix chinensis had significantly greater fresh biomass and plant height in relative terms than the others in all salt treatments. The order of the relative growth yield in seedling was Tamarix chinensis > Suaeda salsa > Salicornia europaea > Limonium bicolor > Atriplex isatidea > Apocynum venetum > Phragmites australis > Sesbania cannabina. The comprehensive analysis showed that Tamarix chinensis had the highest tolerance to salt, followed by Suaeda salsa, and the salt tolerance of Sesbania cannabina was the lowest.

Metabolomic Study on the Halophyte Suaeda salsa in the Yellow River Delta

2011 ◽  
Vol 39 (8) ◽  
pp. 720-727 ◽  
Author(s):  
Xiaoli Liu ◽  
Linbao Zhang ◽  
Liping You ◽  
Huifeng Wu ◽  
Jianmin Zhao ◽  
...  
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Suaeda Salsa ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Metabolomic Study
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