The impact of eustatic sea-level fluctuations, temperature variations and nutrient-level changes since the Pliocene on tropical carbonate platform (Xisha Islands, South China Sea)

Wu, Feng; Xie, Xinong; Betzler, Christian; Zhu, Weilin; Zhu, Youhua; Guo, Laiyuan; Ma, Zhao-Liang; Bai, Huaqing; Ma, Benjun

doi:10.1016/j.palaeo.2018.10.013

Cited by 24 publications

(4 citation statements)

References 54 publications

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“…Xisha Islands is the biggest archipelago in the South China Sea, with a total land area of 8 km 2 . 28 It is surrounded by the Chinese mainland, Vietnam, Nansha Islands, and Zhongsha Islands. The coral reefs in the Xisha Islands are widely distributed, and it is an important part of the coral reefs in the South China Sea.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Microplastics in the Coral Reef Systems from Xisha Islands of South China Sea

Ding

Jiang

et al. 2019

Environ. Sci. Technol.

204

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The impacts of microplastics on coral reefs are gaining attention due to findings that microplastics affect coral health. This work investigated the distribution and characteristics of microplastics in the seawater, fish, and corals in 3 atolls from the Xisha Islands of South China Sea. In the seawater samples, microplastics were detected in the outer reef slopes, reef flats, and lagoons with abundances ranging from 0.2 to 11.2, 1.0 to 12.2, and 1.0 to 45.2 items L–1, respectively. Microplastic abundance was 0–12.0 items individual–1 (0–4.7 items g–1) in fish and 1.0–44.0 items individual–1(0.02–1.3 items g–1) in coral. The predominant shape and polymer of microplastics in seawater, fish, and coral were fibrous rayon and polyethylene terephthalate (PET). Microplastic sizes primarily ranged from 20–330 μm in both the seawater and fish, while there were relatively more 1–5 mm microplastics in the corals. The shape, size, color, and polymer type distribution patterns of microplastics in seawater more closely resembled those in fish gills than those in fish gastrointestinal tracts or coral samples. This study shows that microplastics are abundant in these coral reef systems and they are captured by fish or “trapped” by corals.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

“…It joins the East China Sea by the Taiwan Strait and connects to the western Pacific Ocean through the Luzon Strait. Xisha Islands is the biggest archipelago in the South China Sea, with a total land area of 8 km 2 . It is surrounded by the Chinese mainland, Vietnam, Nansha Islands, and Zhongsha Islands.…”

Section: Materials and Methodsmentioning

confidence: 99%

Microplastics in the Coral Reef Systems from Xisha Islands of South China Sea

Ding

Jiang

et al. 2019

Environ. Sci. Technol.

204

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“…Biogenic Ba is considered as a good proxy for surface production in global oceans (Dymond et al, 1992;Francois et al, 1995), including the southern SCS (Zhang et al, 2009;. The Ln(Ba/Ti) ratio has been recently applied for Well XK1 coral reefs to reconstruct surface production in the northern SCS since the early Pliocene (Wu et al, 2019). Therefore, the large similarity between profiles of n-C 14-18 FAs and Ln(Ba/Ti) in Well NK1 (Figs.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Production of short-chain n-fatty acids in coral reefs in the southern South China Sea since the Late Miocene

Zhu

Tian

et al. 2022

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…To our knowledge, no gas hydrates have been found in the Xisha area, despite the BSRs, porewater characteristics and the occurrence of pockmarks suggest a great resource potential [20][21][22]. During the last decades, numerous studies have been conducted in this area, but their attention was mainly focused on the formation of carbonates and their paleoclimate evolution [23,24], and no direct investigation on the organic geochemical evidence related to a source indication for verifying the existence of petroleum/gas reservoirs and gas hydrates in the Xisha area has been reported. Therefore, we still do not clearly know the characteristics of sedimentary organic matter in this area, which may provide important information for identifying gas hydrate and petroleum/gas reservoirs.…”

Section: Introductionmentioning

confidence: 98%

Source Indication and Geochemical Significance of Sedimentary Organic Matters from the Xisha Area, the South China Sea

Zhou

et al. 2021

Molecules

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Although various geochemical and geophysical investigations have already indicated a great resource potential in the Xisha area of the South China Sea, the origin of organic matter and molecular evidence for tracing the migration of hydrocarbons from deep petroleum reservoirs are still lacking. In this study, systematic organic geochemical analyses, including bulk organic matter parameters and lipid biomarkers were performed for deep sediments from two cores. The C/N ratios and δ13C and δ15N values of organic matter in most of the samples, together with the maxima of short-chain n-alkanoic acids and mid-chain n-alkanols, high abundances of monounsaturated fatty acids C18:1ω9 and C22:1ω13, jointly indicate the dominance of marine organic matter. n-Alkanes in sediments from core GMGS4-XH-W06B are characterized by small unresolved complex mixture (UCMs) humps, high odd/even predominance (OEP) and carbon preference index (CPI) values, clearly exhibiting characteristics of modern sediments. However, the sediments for core GMGS4-XH-W03B are featured with big UCMs, associated with OEP and CPI values around 1.0, showing signatures of petroleum hydrocarbons from high maturity sources. Considering the geologic background, the biomarker signatures are solid evidence for indicating the existence of underlying petroleum reservoirs, and may provide the valuable information for assessing the hydrocarbon resources in the Xisha area.

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The impact of eustatic sea-level fluctuations, temperature variations and nutrient-level changes since the Pliocene on tropical carbonate platform (Xisha Islands, South China Sea)

Cited by 24 publications

References 54 publications

Microplastics in the Coral Reef Systems from Xisha Islands of South China Sea

Microplastics in the Coral Reef Systems from Xisha Islands of South China Sea

Production of short-chain n-fatty acids in coral reefs in the southern South China Sea since the Late Miocene

Source Indication and Geochemical Significance of Sedimentary Organic Matters from the Xisha Area, the South China Sea

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