Tide-surge interaction along the east coast of the Leizhou Peninsula, South China Sea

The seasonal and spatial variations of cladocerans were studied based on samples collected with 169 μm mesh plankton nets from July to August 2006 (summer), December 2006 to January 2007 (winter), and in April 2007 (spring) on the northwestern continental shelf of the South China Sea. Three species of cladocerans (Pseudevadne tergestina, Penilia avirostris, and Podon schmackeri) were observed. Cladocerans occur in spring and summer, but not in winter. They showed an average abundance of 12.82 (± 48.44) inds m−3 in spring and 64.66 (± 188.82) inds m−3 in summer. P. avirostris occurred in the inshore waters of the Leizhou Peninsula during spring, but in summer they were found in large number along the inshore waters from Leizhou Peninsula to the southeast of Hainan Island, with the highest abundance (1121.50 inds m−3). P. tergestina was the most dominant species both in spring and summer, being widely distributed throughout the whole surveyed area. P. schmackeri was distributed mainly along the inshore waters of the Leizhou Peninsula during spring, and mainly along the inshore waters of Hainan Island during the summer (with low density). Our results suggest that the unstable water environment resulting from the strong northeastern monsoon in winter may explain the absence of cladocerans in a large area of the northwest continental shelf of the South China Sea. High chlorophyll a concentration owing to physical factors (e.g., cold eddy, coastal upwelling and mixing) may be the main reason for the difference in the spatial distribution of cladocerans in the subtropical and tropical areas of our survey.

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Timing of Holocene sea-level highstands by mass spectrome- tric U-series ages of a coral reef from Leizhou Peninsula, South China Sea

Chinese Science Bulletin ◽

10.1360/02tb9083 ◽

2002 ◽

Vol 47 (4) ◽

pp. 348 ◽

Cited By ~ 2

Author(s):

Jianxin ZHAO

Keyword(s):

Coral Reef ◽

South China Sea ◽

Sea Level ◽

South China ◽

Leizhou Peninsula ◽

China Sea ◽

Mass Spectrome ◽

Holocene Sea Level

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Inner Shelf Benthic Foraminifera of the South China Sea, East Coast Peninsular Malaysia

The Journal of Foraminiferal Research ◽

10.2113/gsjfr.49.1.11 ◽

2019 ◽

Vol 49 (1) ◽

pp. 11-28 ◽

Cited By ~ 2

Author(s):

Rokiah Suriadi ◽

Hasrizal Shaari ◽

Stephen J. Culver ◽

Mohd Lokman Husain ◽

V. R. Vijayan ◽

...

Keyword(s):

South China Sea ◽

South China ◽

Benthic Foraminifera ◽

East Coast ◽

Peninsular Malaysia ◽

The South ◽

Inner Shelf ◽

China Sea ◽

The North ◽

Muddy Sediments

Abstract The distributional patterns of modern benthic foraminifera from the inner shelf of the southern South China Sea, off the east coast of peninsular Malaysia, are documented for the first time. The study area from Tanjung Sedili, Johor in the south to Marang, Terengganu, in the north was selected for a sand-resource study by the Minerals and Geoscience Department, Malaysia in 1993. Twenty-four surface sediment samples from <50 m water depth contained 266 foraminiferal species belonging to 6 orders, 49 families, and 117 genera, including 32 agglutinated, 130 calcareous hyaline, and 104 calcareous porcelaneous species. Two biofacies were distinguished by cluster analysis. Biofacies A was characterized by high relative abundance of Amphistegina papillosa and few other larger benthic foraminiferal (LBF) taxa in sandier sediments. Biofacies B was characterized by Pseudorotalia schroeteriana and other small rotaliids that were found in muddy sediments. The following features of foraminiferal assemblages and sediments reflect the strong fluvial/terrestrial influence on this tropical shelf environment: the overall moderate foraminiferal diversity, dominance of rotaliids over miliolids, overall dominance of smaller foraminiferal assemblages by Elphidium crispum, the limited diversity of LBF, the limited abundance of A. lessonii and the dominance of LBF assemblages by A. papillosa at relatively shallow depths. These features indicate at least intermittently turbid waters with limited light penetration and the dominance of the shelf sediments by siliciclastics, with mean percent carbonates <35%.

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