Abstract:
:Recent at sea surveys of floating macro-debris in the southeast Atlantic Ocean found that debris increases in size with distance from shore, suggesting that many smaller items, which dominate litter close to urban source areas, sink before dispersing far into the ocean. We test whether this pattern is evident in beach litter in the same region. Freshly stranded beach litter was collected at increasing distances (0km, 100km, 200km and 2800km) from Cape Town, a major urban litter source. Mean size and buoyancy of litter items increased significantly with distance from Cape Town. Size-specific sedimentation due to the ballasting effect of biofouling is a plausible explanation for the disappearance of smaller, less buoyant items. Our results provide further evidence that many low buoyancy items sink and support the hypothesis that size and buoyancy are strong predictors of dispersal distance for floating debris.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Fazey FMC,Ryan PGdoi
10.1016/j.marpolbul.2016.06.039subject
Has Abstractpub_date
2016-09-15 00:00:00pages
371-377issue
1eissn
0025-326Xissn
1879-3363pii
S0025-326X(16)30444-1journal_volume
110pub_type
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journal_title:Marine pollution bulletin
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journal_title:Marine pollution bulletin
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journal_title:Marine pollution bulletin
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pub_type: 杂志文章
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journal_title:Marine pollution bulletin
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journal_title:Marine pollution bulletin
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journal_title:Marine pollution bulletin
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journal_title:Marine pollution bulletin
pub_type: 杂志文章
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