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Journal ArticleDOI

Distribution and abundance of thaliaceans in the northwest continental shelf of South China Sea, with response to environmental factors driven by monsoon

01 Jun 2011-Continental Shelf Research (Pergamon)-Vol. 31, Iss: 9, pp 979-989
TL;DR: In this article, the distribution and abundance of thaliaceans were studied in relation to physical and biological variables during summer and winter in the northwest continental shelf of South China Sea.
About: This article is published in Continental Shelf Research.The article was published on 2011-06-01. It has received 39 citations till now. The article focuses on the topics: Continental shelf & Monsoon.
Citations
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Journal ArticleDOI
TL;DR: It was revealed that socio-economic development was associated with the PFAS contamination in coastal regions of South China, and significant correlations between concentration of total PFASs with gross domestic product (GDP) per capita and population density were found in the areas, suggesting that the influence of intense human activities in these areas may have resulted in higherPFAS contamination to the adjacent environment.

93 citations

Journal ArticleDOI
TL;DR: Preliminary environmental hazard assessment showed that PFASs posed minimal risk to marine organisms in the coastal region of the SCS, with the exception of PFOS.

81 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated nutrient biogeochemistry in coastal areas was affected by human activities (e.g., aquaculture, agriculture, and by natural phenomena including typhoons) and provided an overview of human perturbations of coastal ecosystems in this tropical region.
Abstract: . Nutrient dynamics based on field observations made along the eastern Hainan Island during the period 2006–2009 were investigated to understand nutrient biogeochemical processes, and to provide an overview of human perturbations of coastal ecosystems in this tropical region. The rivers showed seasonal variations in nutrient concentrations, with enrichment of dissolved inorganic nitrogen and dissolved silicate, and depletion of PO43−. High riverine concentrations of nitrate mainly originated from agricultural fertilizer inputs. The DIN : PO43− ratios ranged from 37 to 1063, suggesting preferential depletion of PO43− relative to nitrogen in rivers. Chemical weathering in the drainage area might explain the high levels of dissolved silicate. Aquaculture ponds contained high concentrations of NH4+ and dissolved organic nitrogen. The particulate phosphorus concentrations in the study area were lower than those reported for estuaries worldwide. The particulate silicate levels in rivers and lagoons were lower than the global average level. Nutrient biogeochemistry in coastal areas was affected by human activities (e.g., aquaculture, agriculture), and by natural phenomena including typhoons. The nutrient concentrations in coastal waters were low because of dispersion of land-derived nutrients in the sea. Nutrient budgets were built based on a steady-state box model, which showed that riverine fluxes are magnified by estuarine processes (e.g., regeneration, desorption) in estuaries and Laoyehai Lagoon, but not in Xiaohai Lagoon. Riverine and groundwater inputs were the major sources of nutrients to Xiaohai and Laoyehai lagoons, respectively, and riverine inputs and aquaculture effluents were the major sources for the eastern coast of Hainan Island. Nutrient inputs to the coastal ecosystem increased with typhoon-induced runoff of rainwater, elucidating the important influence of typhoons on small tropical rivers.

67 citations


Cites background or methods from "Distribution and abundance of thali..."

  • ...The analytical precision of PP, PIP, and POP was 5 % (Li et al., 2011b)....

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  • ...The upwelling commences in April and ends in October, and extends from 30 m water depth to 10 km offshore (Li et al., 2011a)....

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  • ...The analytical precision of PBSi and LSi measurements was 7 % (n = 7) and 8 % (n = 7), respectively (Li et al., 2011b)....

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Journal ArticleDOI
TL;DR: In this article, a three end-member mixing model based on lignin phenol yields and stable carbon isotopic compositions was used to distinguish sources of organic matter (OM) in riverine particles and surface sediments from the northern South China Sea.

67 citations


Additional excerpts

  • ...The Guangdong Coastal Current flows along the coastal margin to the southwest and results in a cyclonic circulation at Guangzhou Bay (Li et al., 2011)....

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Journal ArticleDOI
TL;DR: In this paper, high-resolution profiling and coring reveals an elongated (ca. 400 km) Holocene Zhujiang River (Pearl River)-derived mud area (maximum thickness > 20 m) extending from the Zhujiang river Delta, southwestward off the Guangdong coast, to the Leizhou Peninsula.
Abstract: High-resolution Chirp profiling and coring reveals an elongated (ca. 400 km) Holocene Zhujiang River (Pearl River)-derived mud area (maximum thickness > 20 m) extending from the Zhujiang River Delta, southwestward off the Guangdong coast, to the Leizhou Peninsula. Two depo-centers, one proximal and one distal, are identified. On the continental shelf off the west Guangdong Province, the mud is deposited in water depth shallower than 50 m; while to the southeast of the Zhujiang River Estuary, the mud area can extend to the −120 m isobath. A combined analysis with the stratigraphic sequences of other muddy deposits in the Western Pacific marginal seas (mainly Changjiang (Yangtze) and Huanghe (Yellow) Rivers derived) indicates that the initiation of the Zhujiang River muddy deposit can be further divided into two stages: Stage 1 is before the mid-Holocene sea-level highstand (ca. 7.0 cal. ka BP), the proximal mud was mostly deposited after 9.0 cal. ka BP, when the sea-level rose slowly after the Meltwater Pulse −1C; Stage 2, after the mid-Holocene sealevel highstand, clinoform developed on the continental shelf off the west Guangdong Province, extending ca. 400 km from the Zhujiang River Estuary. The proximal clinoform thins offshore, from ca. 10 m thickness around 5–10 m water depth to less than 1–2 m around 20–30 m water depth. In addition, we also find a developed distal clinoform in the east of the Leizhou Peninsula.

59 citations

References
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Book
01 Jan 1984
TL;DR: In this article, the authors describe counting, media, and preservatives for analytical techniques, including soluble organic material, plant pigments, and photosynthesis in seawater, and show how to count media and preservative.
Abstract: Preface. General notes on analytical techniques. Nutrients. Soluble organic material. Particulate material. Plant pigments. Photosynthesis. Bacteria. Gases in seawater. Counting, media and preservatives. Terms and equivalents.

6,752 citations


"Distribution and abundance of thali..." refers methods in this paper

  • ...The mean of water column Chl a concentration (unit: mg m–3) was then determined fluorimetrically (Turner designs 10 AU fluorometer) before and after acidification (Parsons et al., 1984)....

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  • ...The mean of water column Chl a concentration (unit: mg m) was then determined fluorimetrically (Turner designs 10 AU fluorometer) before and after acidification (Parsons et al., 1984)....

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Journal ArticleDOI
TL;DR: In this paper, the authors identified three factors that contribute to a generally cyclonic gyre in the upper ocean of the northern SCS: (1) the quasi-seasonal component of the wind forcing; (2) net water transport into the SCS through the Luzon Strait; (3) Vorticity advection from the Kuroshio.

380 citations


"Distribution and abundance of thali..." refers background in this paper

  • ...The climate in the SCS is dominated by the East Asian monsoon system (Su, 2004)....

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Journal ArticleDOI
TL;DR: How life cycle patterns are central in marine ecology, as are the pulses of gelatinous organisms, are described, and how such a dramatic lack of knowledge can affect the authors' understanding of the marine ecosystem as a whole is highlighted.
Abstract: In spite of being one of the most relevant components of the biosphere, the plank- ton-benthos network is still poorly studied as such. This is partly due to the irregular occurrence of driving phenomena such as gelatinous plankton pulses in this realm. Gelatinous plankters rely on their life cycles and histories to exploit temporarily abundant resources with an undeniable, but often overlooked, impact on marine food webs. Dramatic increases of gelatinous filter-feeders and/or carnivores (both native and nonindigenous species) are frequently observed, and explana- tions of these blooms alternatively invoke ecosystem variability, climate change, unspecified anthropogenic perturbation or removal of top predators from trophic networks. Gelatinous plank- ters, however, are not anomalies in plankton dynamics: the recognition of the ecological impor- tance of their pulses, based on their life cycle patterns (often involving benthic stages), is a critical breakthrough to understand the cycling diversity of plankton in space and time. The current study focuses on the many neglected aspects of the ecology and biology of gelatinous zooplankton, describes how life cycle patterns are central in marine ecology, as are the pulses of gelatinous organisms, and highlights how such a dramatic lack of knowledge can affect our understanding of the marine ecosystem as a whole.

327 citations


"Distribution and abundance of thali..." refers background in this paper

  • ...They are receiving an increasing attention recently due to their ecological, evolutionary and biogeochemical importance (Boero et al., 2008)....

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Book
01 Jan 1998
TL;DR: The relationships and systematics of the Thaliacea, with keys for identification, and the role of appendicularia in marine food webs are discussed.
Abstract: Introduction Chapter 1 - Anatomy of Thaliacea Chapter 2 - Anatomy of Appendicularia Chapter 3 - Locomotion, locomotor muscles and buoyancy Chapter 4 - Nervous system, sense organs and excitable epithelia Chapter 5 - Feeding and energetics of Thaliaceans Chapter 6 - The Appendicularian house Chapter 7 - Salp and pyrosomid blooms and their importance in biogeochemical cycles Chapter 8 - Feeding and metabolism of appendicularians Chapter 9 - Life history of the appendicularians Chapter 10 - The role of appendicularia in marine food webs Chapter 11 - The parasites and predators of Thaliacea Chapter 12 - Bioluminescence in the Appendicularia Chapter 13 - The cladistic biogeography of salps and pyrosomas Chapter 14 - Appendicularian distribution and zoogeography Chapter 15 - Molecular phylogeny of tunicates. A preliminary study using 28 Sribosomal RNA partial sequences: implications in terms of evolution and ecology Chapter 16 - The relationships and systematics of the Thaliacea, with keys for identification Chapter 17 - The classification of Appendicularia References Taxonomic Index Subject Index

251 citations


"Distribution and abundance of thali..." refers background in this paper

  • ...Thaliacea have complex life cycles with the alternation of sexual and asexual generations (Bone, 1998), and asexual reproduction results in thaliaceans being able to respond quickly to the favorable conditions of physical and phytoplankton dynamics (Deibel, 1985; Paffenhöfer and Lee, 1987;…...

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  • ...They have complex life cycles with obligatory alternation of sexual and asexual generations (Bone, 1998), and are adapted to respond quickly to physical and biological dynamics (Paffenhöfer and Lee, 1987; Deibel and Paffenhöfer, 2009)....

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Journal ArticleDOI
TL;DR: In this paper, a three-dimensional baroclinic nonlinear numerical model is employed to investigate the summer upwelling in the northern continental shelf of the South China Sea (NCSCS) and the mechanisms of the local winds inducing the coastal upwellings, associated with the QuikSCAT wind data.

182 citations


"Distribution and abundance of thali..." refers background in this paper

  • ...A coastal upwelling will appear in the east onshore waters of Hainan Island driven by strong SW monsoon and topography (Han et al., 1990; Wu and Li, 2003; Jing et al., 2009; Su and Pohlmann, 2009), whose center is located between 181300–201300N and 1101–1111300E, and shallow from 30 m water depth and 10 km offshore (Fig....

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  • ...The appearance of abnormally low temperature and high salinity in the surface waters during summer suggests that an occurrence of an upwelling event, which had been confirmed by Jing et al. (2009) in both climatological remote sensing SST image and field data....

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  • ...…upwelling will appear in the east onshore waters of Hainan Island driven by strong SW monsoon and topography (Han et al., 1990; Wu and Li, 2003; Jing et al., 2009; Su and Pohlmann, 2009), whose center is located between 181300–201300N and 1101–1111300E, and shallow from 30 m water depth and 10…...

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