scholarly journals Phylogeography of the Assassin Bug Sphedanolestes impressicollis in East Asia Inferred From Mitochondrial and Nuclear Gene Sequences

2019 ◽  
Vol 20 (5) ◽  
pp. 1234
Author(s):  
Zhenyong Du ◽  
Tadashi Ishikawa ◽  
Hui Liu ◽  
Satoshi Kamitani ◽  
Osamu Tadauchi ◽  
...  
Keyword(s):  
East Asia ◽  
Sea Level ◽  
East China Sea ◽  
East Asian ◽  
Nuclear Gene ◽  
Distribution Patterns ◽  
East China ◽  
The East China Sea ◽  
Land Bridge ◽  
Assassin Bug

The assassin bug, Sphedanolestes impressicollis (Hemiptera: Reduviidae), is widely distributed in East Asia. It is an ideal model for evaluating the effects of climatic fluctuation and geographical events on the distribution patterns of East Asian reduviids. Here, we used two mitochondrial genes and one nuclear gene to investigate the phylogeographic pattern of the assassin bug based on comprehensive sampling in China, Japan, South Korea, Vietnam, and Laos. High levels of genetic differentiation were detected among the geographic populations classified into the northern and southern groups. A significant correlation was detected between genetic and geographical distances. The East China Sea land bridge served as a “dispersal corridor” during Pleistocene glaciation. The estimated divergence time indicated that the northern group may have separated from the eastern Chinese populations when the sea level rapidly rose during the “Ryukyu Coral Sea Stage” and the East China Sea land bridge was completely submerged. Demographic history and ecological niche modeling suggested that appropriate climatic conditions may have accounted for the rapid spread across the Korean Peninsula and Japan during the late Pleistocene. Our study underscores the pivotal roles of the Pleistocene sea level changes and climatic fluctuations in determining the distribution patterns of East Asian reduviids.

scholarly journals Sea level implications from Late Quaternary/Holocene paleosols from the Oujiang Delta, China

Radiocarbon ◽  
2018 ◽  
Vol 61 (1) ◽  
pp. 83-99
Author(s):  
Daidu Fan ◽  
Shuai Shang ◽  
George Burr
Keyword(s):  
Sea Level ◽  
East China Sea ◽  
Late Quaternary ◽  
Sediment Cores ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Mis 3 ◽  
Plant Matter ◽  
The Last Glacial

ABSTRACTWe describe two coastal paleosols recovered in sediment cores from the Oujiang Delta, Southeast China. These provide useful benchmarks for past sea level change on the East China Sea coast. Radiocarbon (14C) dates on charcoal and plant matter show that one formed during Marine Isotope Stage 3 (MIS 3) and was exposed for perhaps 20 ka, during the Last Glacial Maximum. The other formed in the Early Holocene and was briefly exposed, during a period of fluctuating sea level. Similar paleosols have been described from the Changjiang (Yangtze) Delta, and at many other sites from the East China Sea. The MIS 3 paleosol records a regional relative sea level of about –27 m at the end of MIS 3. While this value is consistent with other paleo sea level estimates for the East China Sea region, it is much higher than predicted by eustatic sea level estimates.

Causes of seasonal sea level anomalies in the coastal region of the East China Sea

2016 ◽  
Vol 35 (3) ◽  
pp. 21-29 ◽  
Author(s):  
Hui Wang ◽  
Kexiu Liu ◽  
Dongmei Qi ◽  
Zhigang Gao ◽  
Wenjing Fan ◽  
...  
Keyword(s):  
Sea Level ◽  
East China Sea ◽  
Coastal Region ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Sea Level Anomalies

Impacts of Binary-interacted Typhoons Tembin and Bolaven in 2012 on Surges and Waves over the East China Sea

2020 ◽  
Author(s):  
Jie Yang ◽  
Yong Li ◽  
Meixiang Chen
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
East China Sea ◽  
Coastal Hazards ◽  
The Yellow Sea ◽  
East China ◽  
Altimeter Data ◽  
The East China Sea ◽  
China Sea ◽  
Hurricane Wind

<p>Typhoon-induced storm surges and waves are highly related with typhoon track and associated wind stresses and atmospheric pressures at sea surface. The effects of binary interaction may alter typhoon tracks and even forward speed, which might influence waves and surge heights in the ocean. In the present study, we execute a series of numerical experiments to investigate how isolated and binary typhoons would impact the ocean waves and generated surges offshore and nearshore. The responses of binary typhoons to sea level rise and land subsidence are also discussed. The Typhoon Tembin and Typhoon Bolaven influenced the East China Sea with equivalent intensity of tropical storm and Category 2, respectively, on the Saffir–Simpson hurricane wind scale. The Weather Research and Forecasting (WRF) model is utilized to hindcast the layered wind and atmospheric pressure fields above sea/land surface. Two synthetic scenarios isolating these individual typhoons are designed to investigate the potential impacts of the binary-interacted typhoons. By coupling with the SCHISM–WWMIII modelling system, the corresponding surge–tide–wave processes are solved and validated with measurements at tidal gauge and wave buoy stations. At the same time, The spatial-varied future relative sea level rise (RSLR) by the end of the century is projected from satellite altimeter data-based sea level analysis and is adjusted for the influence of the Glacial Isostatic Adjustment (GIA) using the ICE-6G/VM5a model. The results indicate that the surge and wave heights induced by these two typhoons were not exacerbated significantly, as the hours influencing the Yellow Sea by Typhoon Tembin were about 30 hours later than Typhoon Bolaven. We also present the spatial distribution of nonlinear responses of storm surge induced extreme sea levels to RSLR, implicating the regions of exacerbation and attenuation, respectively, due to future sea level trend. The present study helps identifying distribution patterns by binary-interacted typhoons and enhancing assessment accuracy of potential coastal hazards and flood risk.</p>

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