Seasonal variations in coastal debris on Awaji Island, Japan

Shimizu, Takanori; Nakai, Junko; Nakajima, Kunikatsu; Kozai, Naoki; Takahashi, Genta; Matsumoto, Megumi; Kikui, Junichi

doi:10.1016/j.marpolbul.2007.10.005

Cited by 30 publications

(6 citation statements)

References 2 publications

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“…In this study, the high concentration of MPs during spring could be related to the seasonality effect. Rainfall during the wet season (winter) may explain these differences, as surface runoff can transport plastic litter from inland areas to streams and rivers (Shimizu et al, 2008;Ivar do Sul and Costa, 2013). Moreover, abundances and weights of plastic debris were demonstrated to be significantly higher in the wet season compared to the dry season (Cheung et al, 2016), similar to the obtained pattern in this study.…”

Section: Microplastics Concentration and Polymers Abundancessupporting

confidence: 87%

Floating Marine Litter in Eastern Mediterranean From Macro to Microplastics: The Lebanese Coastal Area as a Case Study

Jemaa

Mahfouz

Kazour

et al. 2021

Front. Environ. Sci.

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Despite emerging and increasing concerns related to marine micro and macroplastics, no systematic surveys have been undertaken yet in the Lebanese marine area. To understand the spatio-temporal variation of plastic litter (macro and microplastics) in the Lebanese marine environment and to determine the sources of pollution, this study investigated the characteristics of plastic pollution in sea surface waters during wet and dry seasons in 22 sites of Beirut and Tyre regions. A total of 23,023 items were identified and assessed according to the shape, color, and concentration; moreover, the risk of microplastics (MPs) contamination was explored based on a risk assessment model. The obtained results demonstrated that the average macroplastics concentration was 0.45 ± 0.6 items/m3. The average microplastics concentration was found to be 20.1 ± 21.8 and 3.78 ± 5.2 items/m3 in spring and fall respectively. During fall, MPs fragments were dominant in Beirut (97%) and Tyre (91%), and no pellets were observed. During spring, filaments were most encountered in Beirut (76.5%). The most dominant marine litter color was blue followed by black and white. The Pollution Load Index (PLI) values showed a moderate contamination of the Lebanese coast with MPs (PLI: 5.79 ± 3.93) except for several sites in Beirut that showed high values of PLI, highlighting the local influence of cities and rivers on MPs concentration. This study serves as an important baseline for understanding the characteristics of the seasonal variation of MPs along the Lebanese marine environment; it will help stakeholders and countries to take proactive and reactive actions to face plastic litter pollution in the Lebanese coastal area.

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Section: Microplastics Concentration and Polymers Abundancessupporting

confidence: 87%

Floating Marine Litter in Eastern Mediterranean From Macro to Microplastics: The Lebanese Coastal Area as a Case Study

Jemaa

Mahfouz

Kazour

et al. 2021

Front. Environ. Sci.

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“…Litter originating from boat activities and fishery/farming behavior contributed substantially (this study: 16.8%; Mediterranean average: 5%; PNUE/PAM/MEDPOL, 2009), but did not reach that flow into this coastal area can transport litter from inland sources to the coast thereby contributing to densities of litter on the beaches. The input of litter by rivers can be intensified by rain (Shimizu et al, 2008), and, in north-eastern Italy, winter 2014-2015 was among the wettest in decades (www.meteoromagna.com). As a matter of fact, Volano (which is the nearest beach to the Po deltaic branches) and Rosolina (which is delimited by the Adige at north) exhibited the highest density of dumping activities-related litter.…”

Section: Beach Litter Compositionmentioning

confidence: 99%

Marine litter on Mediterranean shores: Analysis of composition, spatial distribution and sources in north-western Adriatic beaches

et al. 2016

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Marine litter is one descriptor in the EU Marine Strategy Framework Directive (MSFD). This study provides the first account of an MSFD indicator (Trends in the amount of litter deposited on coastlines) for the north-western Adriatic. Five beaches were sampled in 2015. Plastic dominated in terms of abundance, followed by paper and other groups. The average density was 0.2 litter items m(-2), but at one beach it raised to 0.57 items m(-2). The major categories were cigarette butts, unrecognizable plastic pieces, bottle caps, and others. The majority of marine litter came from land-based sources: shoreline and recreational activities, smoke-related activities and dumping. Sea-based sources contributed for less. The abundance and distribution of litter seemed to be particularly influenced by beach users, reflecting inadequate disposal practices. The solution to these problems involves implementation and enforcement of local educational and management policies.

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“…They are the result of the breakdown of larger plastic debris (Santos et al 2009;Ivar do Sul et al 2009a;Costa et al 2010) and can be ingested by almost every marine animal (Thompson et al 2004;Browne et al 2008). The dominance of plastic fragments was also reported at Costa do Dendê (Santos et al 2009) and other beaches around the world (Madzena and Lasiak 1997;Thornton and Jackson 1998;Shimizu et al 2008;Corcoran et al 2009), implying that even if plastic pollution is completely prevented in the near future, these fragments will remain in the marine environment for a long time.…”

Section: Seasonal Patterns Quantities and Typesmentioning

confidence: 91%

Plastic Pollution at a Sea Turtle Conservation Area in NE Brazil: Contrasting Developed and Undeveloped Beaches

Sul

Santos

Friedrich

et al. 2011

Estuaries and Coasts

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Sea turtles are highly susceptible to plastic ingestion and entanglement. Beach debris were surveyed along the most important sea turtle nesting beaches in Brazil (Costa dos Coqueiros, Bahia State). No significant differences among developed and undeveloped beaches were observed in terms of total number of items. Local sources (tourism activities) represented 70% of debris on developed beaches, where cigarette butts, straws, paper fragments, soft plastic fragments, and food packaging were the most abundant items. Non-local sources (domestic and fishing activities) accounted for about 70% of debris on undeveloped beaches, where the most abundant items were rigid plastic fragments, ropes, soft plastic fragments, caps, and polystyrene. The projected surface area of beach debris did not vary among developed and undeveloped beaches. Overseas containers accounted for about 25% of regional plastic pollution, implying that international pollution prevention agreements are not being respected off the Brazilian coast.

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Seasonal variations in coastal debris on Awaji Island, Japan

Cited by 30 publications

References 2 publications

Floating Marine Litter in Eastern Mediterranean From Macro to Microplastics: The Lebanese Coastal Area as a Case Study

Floating Marine Litter in Eastern Mediterranean From Macro to Microplastics: The Lebanese Coastal Area as a Case Study

Marine litter on Mediterranean shores: Analysis of composition, spatial distribution and sources in north-western Adriatic beaches

Plastic Pollution at a Sea Turtle Conservation Area in NE Brazil: Contrasting Developed and Undeveloped Beaches

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