Distribution of drifting seaweeds in eastern East China Sea

Komatsu, Toshimitsu; Tatsukawa, Kenichi; Filippi, Jean Baptiste; Sagawa, T.; Matsunaga, Daisuke; Mikami, Akiko; Ishida, Kunio; Ajisaka, Tetsuro; Tanaka, Katsuhiko; Aoki, Masakazu; Wang, Wei Ding; Liu, Hui Fei; Zhang, Shou Du; Zhou, Min; Sugimoto, Takashige

doi:10.1016/j.jmarsys.2006.05.018

Cited by 83 publications

(70 citation statements)

References 8 publications

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“…seaweed beds, rivers, fishery and shipping activity), (ii) temporal supply dynamics (e.g. annual growth seasons for vegetation or river runoff for wood and litter) (Kingsford, 1992;Johansen, 1999;Hirata et al, 2001;Moore et al, 2002), (iii) their floating potential at the sea surface (Barnes and Fraser, 2003;Vandendriessche et al, 2007;Rothäusler et al, 2009), and (iv) winds, currents and other hydrographic features such as frontal systems that drive dispersal, accumulation and sink processes (Valle-Levinson et al, 2006;Komatsu et al, 2007;Pichel et al 2007;Astudillo et al, 2009;Martinez et al, 2009). In the German Bight floating wood and anthropogenic debris come through the major rivers, and supply may vary during the year due to seasonally varying river runoff.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal distribution of floating objects in the German Bight (North Sea)

Thiel

Hinojosa

Joschko

et al. 2011

Journal of Sea Research

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Floating objects facilitate the dispersal of marine and terrestrial species but also represent a major environmental hazard in the case of anthropogenic plastic litter. They can be found throughout the world's oceans but information on their abundance and the spatio-temporal dynamics is scarce for many regions of the world. This information, however, is essential to evaluate the ecological role of floating objects. Herein, we report the results from a ship-based visual survey on the abundance and composition of flotsam in the German Bight (North Sea) during the years 2006 to 2008. The aim of this study was to identify potential sources of floating objects and to relate spatio-temporal density variations to environmental conditions. Three major flotsam categories were identified: buoyant seaweed (mainly fucoid brown algae), natural wood and anthropogenic debris. Densities of these floating objects in the German Bight were similar to those reported from other coastal regions of the world. Temporal variations in flotsam densities are probably the result of seasonal growth cycles of seaweeds and fluctuating river runoff (wood). Higher abundances were often found in areas where coastal fronts and eddies develop during calm weather conditions. Accordingly, flotsam densities were often higher in the inner German Bight than in areas farther offshore. Import of floating objects and retention times in the German Bight are influenced by wind force and direction. Our results indicate that a substantial amount of floating objects is of coastal origin or introduced into the German Bight from western source areas such as the British Channel. Rapid transport of floating objects through the German Bight is driven by strong westerly winds and likely facilitates dispersal of associated organisms and gene flow among distant populations.

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Section: Introductionmentioning

confidence: 99%

Spatio-temporal distribution of floating objects in the German Bight (North Sea)

Thiel

Hinojosa

Joschko

et al. 2011

Journal of Sea Research

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“…Recently, Konishi (2000) and Komatsu et al (2007) reported that drifting seaweeds are found on the continental shelf along the East China Sea oceanic front (between Kuroshio and continental shelf waters) between March and May. These drifting seaweeds were composed of only one species, Sargassum horneri (Turner) C. Agardh.…”

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Abundance of drifting seaweeds in eastern East China Sea

et al. 2008

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“…Setch became uncommon species; furthermore, S. horneri disappeared in the intertidal zone during the observation period; thus, the local fixed S. horneri cannot be found now. Komatsu et al (2007) conducted research in the eastern East China Sea during May 2002 and March 2004, which revealed that the floating seaweeds were distributed along the front between the Kuroshio Current and coastal waters and were mainly composed of 1 seaweed species, S. horneri, from spring to early summer. The field survey revealed that Sargassum forests were mainly composed of S. horneri around Goqui Island, Shensi Prefecture, Zhejiang Province, China (Komatsu et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Komatsu et al (2007) conducted research in the eastern East China Sea during May 2002 and March 2004, which revealed that the floating seaweeds were distributed along the front between the Kuroshio Current and coastal waters and were mainly composed of 1 seaweed species, S. horneri, from spring to early summer. The field survey revealed that Sargassum forests were mainly composed of S. horneri around Goqui Island, Shensi Prefecture, Zhejiang Province, China (Komatsu et al, 2007). Additionally, Abé et al (2013) reported that the floating S. horneri probably originated in the southern East China Sea.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation of Sargassum horneri populations detected by inter-simple sequence repeats

Ren

Yang

et al. 2015

Genet. Mol. Res.

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ABSTRACT. The seaweed Sargassum horneri is an important brown alga in the marine environment, and it is an important raw material in the alginate industry. Unfortunately, the fixed resource that was originally reported is now reduced or disappeared, and increased floating populations have been reported in recent years. We sampled a floating population and 4 fixed cultivated populations of S. horneri along the coast of Zhejiang, China. Inter-simple sequence repeat (ISSR) markers were applied in this research to analyze the genetic variation between floating populations and fixed cultivated populations of S. horneri. In total, 220 loci were amplified with 23 ISSR primers. The percentage of polymorphic loci within each population ranged from 53.64 to 95.45%. The highest diversity was observed in population 3, which was the local species that was suspension cultured in the lab and then fixed cultivated in the Nanji Islands before sampling. The lowest diversity was obtained in the floating population 4. The genetic distances among 620 J.R. Ren et al. ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (1): 619-625 (2015) the 5 S. horneri populations ranged from 0.0819 to 0.2889, and the distance tendency confirmed the genetic diversity. The results suggest that the floating population had the lowest genetic diversity and could not be joined into the cluster branch of the fixed cultivated populations.

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Distribution of drifting seaweeds in eastern East China Sea

Cited by 83 publications

References 8 publications

Spatio-temporal distribution of floating objects in the German Bight (North Sea)

Spatio-temporal distribution of floating objects in the German Bight (North Sea)

Abundance of drifting seaweeds in eastern East China Sea

Genetic variation of Sargassum horneri populations detected by inter-simple sequence repeats

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