scholarly journals A Morphodynamic Modeling Study on the Formation of the Large‐Scale Radial Sand Ridges in the Southern Yellow Sea

2019 ◽  
Vol 124 (7) ◽  
pp. 1742-1761 ◽  
Author(s):  
Jianfeng Tao ◽  
Zheng Bing Wang ◽  
Zeng Zhou ◽  
Fan Xu ◽  
Changkuan Zhang ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Large Scale ◽  
Southern Yellow Sea ◽  
The Southern Yellow Sea ◽  
Sand Ridges ◽  
Radial Sand Ridges ◽  
Morphodynamic Modeling ◽  
Modeling Study

scholarly journals First record ofPhyllorhizasp. (Cnidaria: Scyphozoa) in a Chinese coastal aquaculture pond

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6191 ◽  
Author(s):  
Zhijun Dong ◽  
André C. Morandini ◽  
Agustin Schiariti ◽  
Lei Wang ◽  
Tingting Sun
Keyword(s):  
Yellow Sea ◽  
Large Scale ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
First Record ◽  
Morphological Characters ◽  
Southern Yellow Sea ◽  
Shrimp Culture ◽  
Aquaculture Pond ◽  
The Southern Yellow Sea

BackgroundIt has been suggested that aquaculture ponds on the Chinese coast could act as breeding grounds for scyphozoans. Here, we present the first record of the scyphomedusaPhyllorhizasp. in an aquaculture pond on the coast of the southern Yellow Sea, based on a combination of morphological characteristics and mitochondrial 16S DNA sequence data.MethodsA field survey was performed on June 29, 2017 in a pond used for culturing the shrimpPenaeus japonicus, located in the southern Yellow Sea, China. Jellyfish specimens were collected for morphological and genetic analysis. The morphological characters of the jellyfish specimens were compared to taxonomic literature. Additionally, phylogenetic analysis of the mitochondrial 16S fragments of these specimens were also conducted.ResultsThese specimens had the following morphological characters: hemispherical umbrella without scapulets; J-shaped oral arms; a single larger terminal club on each arm; bluish colored with a slightly expanded white tip; and mouthlets present only in the lower half to one-third of each arm. These morphological features of the medusae indicated that the specimens found in the shrimp culture ponds belong to the genusPhyllorhizaAgassiz, 1862, but did not match with the description of any of the known species of the genusPhyllorhiza.Phylogenetic analyses of the mtDNA 16S regions revealed that these specimens, together withPhyllorhizasp. from Malaysian coastal waters, belong to a sister group ofPhyllorhiza punctata. Juveniles and ephyrae ofPhyllorhizasp. were observed in the aquaculture pond. The mean density ofPhyllorhizasp. medusa in the surface water within the pond was estimated to be 0.05 individuals/m2.DiscussionBased on our observations of the gross morphology and molecular data, we state that the specimens collected in the aquaculture pond can be identified asPhyllorhizasp. This is the first record ofPhyllorhizasp. in Chinese seas. Large scale dispersal through ballast water or the expansion of jellyfish aquarium exhibitions are possible pathways of invasion, but this needs to be confirmed in further studies.

Sediment exchange between channel and sand ridges in the southern Yellow Sea: The importance of tidal asymmetries

2020 ◽  
Vol 205 ◽  
pp. 104169
Author(s):  
Gaolei Cheng ◽  
Ya Ping Wang ◽  
George Voulgaris ◽  
Jiabi Du ◽  
Jinyu Sheng ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Southern Yellow Sea ◽  
The Southern Yellow Sea ◽  
Sand Ridges

scholarly journals Monitoring the Dissipation of the Floating Green Macroalgae Blooms in the Yellow Sea (2007–2020) on the Basis of Satellite Remote Sensing

2021 ◽  
Vol 13 (19) ◽  
pp. 3811
Author(s):  
Deyu An ◽  
Dingfeng Yu ◽  
Xiangyang Zheng ◽  
Yan Zhou ◽  
Ling Meng ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Yellow Sea ◽  
Large Scale ◽  
Marine Ecology ◽  
The Yellow Sea ◽  
Green Tide ◽  
Southern Yellow Sea ◽  
Simple Method ◽  
Green Macroalgae ◽  
The Southern Yellow Sea

Large scale green macroalgae blooms (MABs) caused by Ulva prolifera have occurred regularly in the Yellow Sea since 2007. In the MAB dissipation phase, the landing or sinking and decomposition of U. prolifera would alter the physical-chemical environment of seawater and cause ecological, environmental, and economic problems. To understand MAB dissipation features, we used multiple sensors to analyze the spatiotemporal variation of the MAB dissipation phase in the southern Yellow Sea. The results show the variation in the daily dissipation rate (DR) was inconsistent from year to year. Based on the DR variation, a simple method of estimating MAB dissipation days was proposed for the first time. Verification results of the method, from 2018 to 2020, showed the estimated dissipation days were relatively consistent with the results obtained by remote sensing imagery. From 2007 to 2020, the order in which macroalgae landed in the coastal cities of Shandong Peninsula can be roughly divided into two types. In one type, the macroalgae landed first in Rizhao, followed by Qingdao, Rushan, and Haiyang. In the other type, they landed in the reverse order. The MABs annual distribution density showed significant differences in the southern Yellow Sea. These results provided a basis for evaluating the MABs’ impact on marine ecology and formulating the green-tide prevention and control strategies.

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