Seasonal Variations in Biochemical Composition and Reproductive Activity of Venus ClamCyclina sinensis(Gmelin) from the Yellow River Delta in Northern China in Relation to Environmental Factors

2010 ◽  
Vol 29 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Hongwei Yan ◽  
Qi Li ◽  
Ruihai Yu ◽  
Lingfeng Kong
Keyword(s):  
Environmental Factors ◽  
Seasonal Variations ◽  
Biochemical Composition ◽  
Yellow River ◽  
Yellow River Delta ◽  
Northern China ◽  
Reproductive Activity ◽  
River Delta ◽  
The Yellow River ◽  
The Yellow River Delta

scholarly journals Spatial Analysis as a Tool for Plant Population Conservation: A Case Study of Tamarix chinensis in the Yellow River Delta, China

2021 ◽  
Vol 13 (15) ◽  
pp. 8291
Author(s):  
Le Jiao ◽  
Yue Zhang ◽  
Tao Sun ◽  
Wei Yang ◽  
Dongdong Shao ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Spatial Autocorrelation ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Airborne Lidar ◽  
The Yellow River ◽  
Tamarix Chinensis ◽  
The Yellow River Delta ◽  
Intraspecific Facilitation

Saltcedar (Tamarix chinensis) is undergoing population declination and fragmentation due to climate change and human disturbance. The existing restoration strategies usually focus on improving the environmental conditions based on the environment–saltcedar relationship, while they ignore the role of spatial autocorrelation resulting from biological interaction and ecological processes. This oversight limits the efficiency and sustainability of the restoration. Here, we explored the spatial pattern of the saltcedar population in the Yellow River Delta, China, and its relationship with environmental factors, incorporating spatial autocorrelation. The plant and soil parameters were extracted by an airborne LiDAR system integrated with fixed soil environment measurements. The environment–saltcedar relationship incorporating spatial autocorrelation was evaluated with different regression models. Results showed that saltcedars aggregated at small scales (2–6 m), resulting from intraspecific facilitation and wind dispersal of seeds, while intraspecific competition was responsible for the random distribution at large scales (>10 m). The long-distance dispersal of seeds through water explained the significant positive spatial autocorrelation of saltcedars at distances up to 125 m. Consequently, resulting from intraspecific facilitation and seed dispersal, aggregation distribution and positive spatial autocorrelation within the saltcedar population improved the adaptability of saltcedar to environmental stress and thereby reduced the impact of environmental factors on the abundance of saltcedar.

scholarly journals Characteristics and sources of halogenated hydrocarbons in the Yellow River Delta region, northern China

2019 ◽  
Vol 225 ◽  
pp. 70-80 ◽  
Author(s):  
Penggang Zheng ◽  
Tianshu Chen ◽  
Can Dong ◽  
Yuhong Liu ◽  
Hongyong Li ◽  
...  
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Northern China ◽  
River Delta ◽  
Halogenated Hydrocarbons ◽  
The Yellow River ◽  
Delta Region ◽  
The Yellow River Delta

Environmental factors influencing the distribution ofTamarix chinensisLour in the Laizhou Bay wetland of the Yellow River Delta

2016 ◽  
Vol 36 (15) ◽  
Author(s):  
夏江宝 XIA Jiangbao ◽  
赵西梅 ZHAO Ximei ◽  
刘俊华 LIU Junhua ◽  
赵自国 ZHAO Ziguo ◽  
刘庆 LIU Qing ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Laizhou Bay ◽  
The Yellow River Delta ◽  
Factors Influencing

Effects of reclamation on net ecosystem CO2 exchange in wetland in the Yellow River Delta, China

2013 ◽  
Vol 37 (6) ◽  
pp. 503-516 ◽  
Author(s):  
Li-Qiong YANG ◽  
Guang-Xuan HAN ◽  
Jun-Bao YU ◽  
Li-Xin WU ◽  
Min ZHU ◽  
...  
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Co2 Exchange ◽  
River Delta ◽  
The Yellow River ◽  
Net Ecosystem Co2 Exchange ◽  
The Yellow River Delta

scholarly journals Impacts of Consolidation Time on the Critical Hydraulic Gradient of Newly Deposited Silty Seabed in the Yellow River Delta

2021 ◽  
Vol 9 (3) ◽  
pp. 270
Author(s):  
Meiyun Tang ◽  
Yonggang Jia ◽  
Shaotong Zhang ◽  
Chenxi Wang ◽  
Hanlu Liu
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Hydraulic Gradient ◽  
River Delta ◽  
Theoretical Formula ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Critical Hydraulic Gradient ◽  
Seepage Flows ◽  
The Yrd

The silty seabed in the Yellow River Delta (YRD) is exposed to deposition, liquefaction, and reconsolidation repeatedly, during which seepage flows are crucial to the seabed strength. In extreme cases, seepage flows could cause seepage failure (SF) in the seabed, endangering the offshore structures. A critical condition exists for the occurrence of SF, i.e., the critical hydraulic gradient (icr). Compared with cohesionless sands, the icr of cohesive sediments is more complex, and no universal evaluation theory is available yet. The present work first improved a self-designed annular flume to avoid SF along the sidewall, then simulated the SF process of the seabed with different consolidation times in order to explore the icr of newly deposited silty seabed in the YRD. It is found that the theoretical formula for icr of cohesionless soil grossly underestimated the icr of cohesive soil. The icr range of silty seabed in the YRD was 8–16, which was significantly affected by the cohesion and was inversely proportional to the seabed fluidization degree. SF could “pump” the sediments vertically from the interior of the seabed with a contribution to sediment resuspension of up to 93.2–96.8%. The higher the consolidation degree, the smaller the contribution will be.

scholarly journals Nitrate leaching and NH3 volatilization during soil reclamation in the Yellow River Delta, China

2021 ◽  
pp. 117330
Author(s):  
Wei Zhu ◽  
Jingsong Yang ◽  
Rongjiang Yao ◽  
Xiangping Wang ◽  
Wenping Xie ◽  
...  
Keyword(s):  
Nitrate Leaching ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Soil Reclamation ◽  
The Yellow River ◽  
Nh3 Volatilization ◽  
The Yellow River Delta
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