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1.
Mar Pollut Bull ; 152: 110909, 2020 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-31957683

RESUMO

A total of 7563 anthropogenic litter (AL) items, grouped into twelve different typologies, were collected along 25 beaches located on the central Caribbean coast of Colombia. The average AL abundance was 6.05 items/m2, plastic items being the most common reaching a total percentage of 88.9% with an average density of 5.38 items/m2. Application of 3 evaluation indices, based on the AL data, placed most of the beaches into the status of unacceptable conditions of cleanness (Dirty to Extremely Dirty), and into mediocre to unsatisfactory environmental status. Hazardous anthropogenic litter (HAL), occurred in considerable amounts with hazardous items reaching a high of 7% (502 items of 7563 total items collected), and an average of 0.40 items/m2. Beaches were statistically grouped into four specific types that ranged from beaches in good environmental conditions (Group A) to beaches in extremely adverse environmental conditions (Group D). The typology and magnitudes of AL found along the study area suggest a combination of sources that are associated with the multiple usages developed along this region's coast. Anthropogenic litter is mainly related to land-based sources, and these generating source activities can be found in nearby basins and/or on the same beaches where the litter remains. This paper proposes four key actions to specifically reduce AL, as well as an 8-step agenda to address solutions to the broader management of litter problems.

2.
Mar Pollut Bull ; 141: 603-610, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30955773

RESUMO

Although coastal dunes exhibit typical vegetation which involves species adapted to extreme environmental conditions, the mobilization and colonization by non-native species represents a challenge in its conservation and management. In this work, eight dune systems located along the Atlantico Department, Caribbean coast of Colombia were surveyed, finding within them the presence of two plant species recognized as invasive: Calotropis procera and Cryptostegia madagascariensis. The impacts of these two invasive plant species can be significant at all ecological levels in the dune systems. The above demands the implementation of urgent management actions. Eradication seems the optimal control alternative, however preventing invasive plant species from infesting new areas is more cost-effective and efficient than trying to restore the system after it is infested. Data presented in this paper is the first step in the future development of an early detection program in the study area.


Assuntos
Apocynaceae , Calotropis , Espécies Introduzidas , Colômbia , Conservação dos Recursos Naturais/economia , Conservação dos Recursos Naturais/métodos , Ecossistema
3.
Mar Pollut Bull ; 136: 435-447, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30509827

RESUMO

A total of 5993 litter items divided into 13 categories were found at 25 beaches located along the Atlantico Department coastline, Caribbean of Colombia, with an average litter abundance of 7 items/m. Agglomerative Hierarchical Clustering (AHC), Multidimensional Scaling (MDS) and Principal Components Analysis (PCA) were applied with the objective of highlighting similarities and contrasts between litter categories and abundances. Results indicated two specific groups of beaches in terms of amounts of litter. The first group is composed of 17 "dirty beaches" (urban, resort and village) while the second group includes 8 "clean beaches" (village and resort). This division was confirmed by means of the EA/NALG (2000) grading system, which highlighted that 68% of beaches belonging to the Atlantico Department coastline are in an unacceptable condition of cleanness. Current patterns of litter abundance and accumulation are related to sources as well as beach characteristics such as degree of exposition and morphodynamic state.


Assuntos
Praias , Poluentes da Água/análise , Praias/estatística & dados numéricos , Cidades , Análise por Conglomerados , Colômbia , Monitoramento Ambiental/métodos , Monitoramento Ambiental/estatística & dados numéricos , Análise de Componente Principal
4.
Mar Pollut Bull ; 128: 185-196, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29571362

RESUMO

Some marine invertebrates can inhabit floating substrates, and raft over long distances, becoming a significant environmental problem in terms of alien species and habitat disruption. On the Atlantico Department beaches (Colombia) woody debris and plastic litter dominate (86%) the types of refuse on the beaches with their densities ranging from 0.82-1.72 items m-1. Such litter and woody debris generate the optimal conditions for floating colonizers. In this work, 26 beaches were surveyed, and 16 of them (62%) were found to have marine fauna using litter and woody debris as a substrate for potential rafting and dispersal. Serpulidae polychaete tubes, goose barnacles Lepas (Anatifa) anserifera Linnaeus, 1767, and the bryozoans Arbopercula tenella (Hincks, 1880), Arbopercula angulata (Levinsen, 1909), plus three unidentified species were found colonizing woody debris, seeds, plastic and glass bottles. These findings of woody debris and litter facilitating the arrival and dispersal of non-native species on this coast, demonstrate that preventive management of such refuse in coastal habitats goes beyond simply preserving coastal esthetics.


Assuntos
Organismos Aquáticos/crescimento & desenvolvimento , Praias/normas , Monitoramento Ambiental/métodos , Plásticos/análise , Resíduos/análise , Madeira/análise , Animais , Região do Caribe , Colômbia , Ecossistema , Espécies Introduzidas/tendências
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