Palaeoceanographic change in the northeastern South China Sea during the last 15000 years

Wei, Kuo-Yen; Lee, Meng‐Yang; Duan, Weiwu; Chen, Chaoyun; Wang, Chung‐Ho

doi:10.1002/(sici)1099-1417(199801/02)13:1<55::aid-jqs332>3.3.co;2-j

Cited by 6 publications

(7 citation statements)

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“…Many oceanographic reports on the SCS, including biology (Morton, 1996;Huang & Qi, 1997), physics (Shaw, 1989;Shaw & Chao, 1994;Chen, 1996;Li et al, 1998), chemistry Chung et al, 1997), and geology (Fang et al, 1998;Wei et al, 1998) have been published lately. The taxonomy of copepods is, however, relatively unknown despite their dominance in the zooplankton , both by species diversity and by numerical abundance.…”

Section: Introductionmentioning

confidence: 99%

Identity and Abundance of Surface-Dwelling, Coastal Copepods of Southwestern Taiwan

Hwang

Chen

2001

Crustac

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Day and night abundance of copepods in the coastal waters off southwestern Taiwan was studied during a cruise on 26-28 December 1997. A total of 14 zooplankton samples (7 daytime and 7 nighttime) was taken at seven stations using a one-meter mouth opening net with 333 ¹m mesh, and a Hydrobios owmeter mounted in the centre of the mouth. The mean numerical abundance of copepods was 123 § 69 ind./m 3 . In all, 67 species of copepods belonging to 16 families and 31 genera were identi ed. Among these, Paracalanus aculeatus (32% of the numerical total of copepods), Acrocalanus gracilis (31%), and Oncaea venusta (11%) were the most dominant species and occurred at every station.Most species were more abundant during the day than at night. Both the index of species diversity and that of species number of copepods were higher at the northern stations and decreased toward the southern stations at night, but behaved in the opposite manner during the day. From the results of cluster analysis, four station groups were formed: daytime northern stations, daytime southern stations, nighttime northern stations, and nighttime southern stations. The daytime northern station group was most distinct from the others. Four copepod groups were also distinguished and are herein discussed. RÉSUMÉ L'abondance, le jour et la nuit, de Copépodes dans les eaux côtières au large de la région sudouest de Taiwan a été étudiée au cours d'une campagne effectuée du 26 au 28 décembre 1997. Un total de 14 échantillons de plancton (7 le jour et 7 la nuit) ont été prélevés dans sept stations, en utilisant un let d'un mètre d'ouverture et de 333 ¹m de vide de maille, muni d'un courantomètre Hydrobios monté au centre de l'ouverture du let. L'abondance numérique moyenne des copépodes était de 123 § 69 ind./m 3 . En tout, 67 espèces de copépodes de 16 familles et 31 genres ont été identi ées. Parmi celles-ci, Paracalanus aculeatus (32% du total dénombré des copépodes), 4 /

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Section: Introductionmentioning

confidence: 99%

Identity and Abundance of Surface-Dwelling, Coastal Copepods of Southwestern Taiwan

Hwang

Chen

2001

Crustac

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“…It is should be noted that estimates of the CaCO 3 mass accumulation rate (MAR) only include the preserved CaCO 3 fraction but neglect the dissolved part (Loubere et al, 2004). Nevertheless, as the dissolution effect above the SCS CCD only shows moderate changes over the last glacial-interglacial cycle (Wang et al, 1995;Chen et al, 1997;Wei et al, 1998), the CaCO 3 MAR can still be used as an approximate proxy for the paleo-carbonate flux in the SCS.…”

Section: Carbonate Sedimentation/accumulation Rate Changesmentioning

confidence: 99%

“…Numerous down-core reconstructions suggest that changes in seawater chemistry of the SCS are accordant with that of the open Pacific Ocean during the late Quaternary, which have resulted in relatively well and poor preservation of carbonate during glacials and interglacials, respectively, as well as carbonate preservation maxima during deglacials for the two regions (Wang and Jian, 1992;Thunell et al, 1992;Miao et al, 1994;Wang et al, 1995;Chen et al, 1997;Wei et al, 1998). However, sedimentary carbonate contents (CaCO 3 %) of the SCS sediments show more complicated variations over glacial-interglacial cycles.…”

Section: Introductionmentioning

confidence: 99%

Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia

Huang

Tian

Qiao

et al. 2015

Quaternary Science Reviews

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“…The coarse grain fraction decreases from about 6% to about 2% in weight in 220-320 cm depth (Ge et al, 2008), implying strengthened dissolution during this episode. Wei et al (1998) calculated the absolute abundance of whole planktonic foraminifera per gram sediments to monitor the bottom-water dissolution intensity in SCS. They found that the dissolution intensity of the bottom waters was generally low during the last glacial period and deglaciation, but it showed a peak during the early Holocene.…”

Section: Low Calcium Carbonate Event During the Earlymentioning

confidence: 99%

Paleoenvironmental records from the northern South China Sea since the Last Glacial Maximum

Chu

Xue

et al. 2010

Acta Oceanol. Sin.

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Core ZHS-176 contains the paleoenvironmental records from the northern South China Sea (NSCS) since the Last Glacial Maximum (LGM). A coupled approach based on clay mineral assemblages, planktonic foraminiferal oxygen and carbon isotopes, and calcium carbonate content is used to trace the sources of the fine-grained sediment and to investigate the paleoenviornmental evolution in this area. Clay mineral assemblages are dominated by illite (average about 39%) and chlorite (about 27%), which comes mainly from Taiwan and the East China Sea. Kaolinite, which accounts for about 13%, comes mainly from the Zhujiang (Pearl) River, and Luzon Island is the main source for smectite (about 21%). The planktonic foraminiferal oxygen isotopic oscillations during the last glacial period are coeval with climate variations recorded in the Greenland ice core and Western Pacific sediment. These variations include the LGM, Heinrich event 1, Bφlling-Allerφd (B/A), and Younger Dryas. For the Holocene, three periods of strong precipitation (S1-S3) and three periods of weak precipitation (W1-W3) are identified. The oxygen isotopic record exhibits correlation with climate records from distant regions, including the high-latitude Northern Hemisphere, providing evidence for global tele-connection among regional climate. A brief, negative planktonic foraminiferal carbon isotopic excursion during B/A reflects increased methane released from marine gas hydrate due to the rapid warming of the water. By comparing calcium carbonate content curves of the core ZHS-176 with these of other five boreholes lying above the lysocline, a remarkable low calcium carbonate event is found during the early Holocene in NSCS.

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Palaeoceanographic change in the northeastern South China Sea during the last 15000 years

Cited by 6 publications

References 0 publications

Identity and Abundance of Surface-Dwelling, Coastal Copepods of Southwestern Taiwan

Identity and Abundance of Surface-Dwelling, Coastal Copepods of Southwestern Taiwan

Early interglacial carbonate-dilution events in the South China Sea: Implications for strengthened typhoon activities over subtropical East Asia

Paleoenvironmental records from the northern South China Sea since the Last Glacial Maximum

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