Volume 8, Issue 2 - December 2008
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Revista de Gestão Costeira Integrada
Volume 8, Número 2, Dezembro 2008, Páginas 221-231
DOI: 10.5894/rgci138
*
Submissão – 17 Julho 2008; Avaliação – 25 Agosto 2008; Recepção da
versão revista – 10 Outubro 2008; Disponibilização on-line - 23
Dezembro 2008
Lixo marinho em área de reprodução de tartarugas marinhas no Estado da Paraíba (Nordeste do Brasil) *
Marine debris at a sea turtles nesting area at Paraiba State, Brazilian Northeast
Rita Mascarenhas 1, 2, 3, Clenia, P. Batista 2, Isa F. Moura,
Allinne R. Caldas 2, 3, José M. da Costa Neto 2, 3,
Mônica Q. Vasconcelos 2, 3, Sulia S. Rosa 2, 3, Taíssa V. S. de Barros 2, 3
1 - Autor correspondente: rita.mascarenhas@gmail.com
2 - Centro de Ciências Exatas e da Natureza, Departamento de
Sistemática e Ecologia, Universidade Federal da Paraíba, Campus I, João
Pessoa, Paraíba, 58059-900 Brazil
3 - Associação Guajiru: Ciência – Educação – Meio Ambiente, Rua Golfo
do Sião, 384, Ponta de Campina – Cabedelo, Paraíba, 58310-000 Brasil
RESUMO
A praia de Intermares, (Paraíba – Brasil), apesar da intensa
urbanização, é importante área de reprodução de tartarugas marinhas no
nordeste brasileiro. A contaminação deste ambiente por lixo pode
implicar na perda de hábitat reprodutivo para as tartarugas. Conhecer o
perfil do lixo neste bolsão de reprodução é fundamental para o
aprimoramento de planos de gestão e conservação. Para tal foi feito um
levantamento do perfil do lixo encontrado na praia durante a estação
reprodutiva de 2006. Para cada um dos três pontos de coleta (extremos e
centro da praia) foram construídas faixas de 50 m2 a partir da linha de
maré, onde dois indivíduos com esforço de 1 hora/dia realizaram 26
coletas durante 2 meses da estação seca. Para observar a deposição de
lixo a cada 24 horas, as coletas foram realizadas em 3 dias
consecutivos, sendo o primeiro, posterior ao dia da limpeza pública. Do
total de 78 amostras obteve-se 6.556 itens que foram classificados em
plástico (80%), restos de alimentos (19,4%), metal (0.5%) e vidro
(0,4%). Não houve diferença significativa entre os tipos de itens
encontrados por ponto, porém, o ponto 3 apresentou a maior concentração
de lixo (47% do total). Pequenos fragmentos de plástico (com cerca de
1,5 cm) denominados plástico mole e plástico duro foram abundantes na
linha de deixa, sugerindo que seu aporte seja dado pela ação das marés
e se trate de lixo proveniente do continente por meio dos rios e
drenagem pluvial. Restos de alimentos e embalagens de biscoitos e
lanches (26% do total de plástico) são provavelmente depositados pelos
usuários da praia e são mais encontrados nos pontos acima da linha de
maré. O item monofilamento de nylon foi mais abundante no ponto 1 com
49% das unidades coletadas e a maioria se encontrava enredado em algas
e junto com outros itens relacionados á pesca correspondeu a 12,8% do
total de itens coletados. Tartarugas marinhas, por utilizarem também o
ambiente terrestre, são duplamente afetadas pela presença de lixo. Nas
areias das praias, o lixo pode afetar o sucesso reprodutivo destes
animais, pois, pode impedir o acesso de fêmeas aos locais adequados de
desovas, bem como impedir os neonatos de emergirem dos ninhos e
alcançarem o mar. Restos de alimentos podem atrair animais nocivos como
ratos que comem os ovos e os neonatos, além de serem vetores de doenças
para a fauna nativa e seres humanos. Em seis anos de atividades a
Associação Guajiru monitorou 670 ninhos da tartaruga-de-pente, em 180
deles (27%) foi encontrado plástico e matéria orgânica. Pelo perfil dos
itens encontrados, pode-se afirmar que os neonatos de tartarugas são os
mais afetados, pois fragmentos de plásticos e monofilamentos têm a
capacidade de obstruir a abertura da câmara de ovos e/ou impedir a
chegada ao mar. Ações de mitigação e extirpação do lixo no ambiente
marinho e costeiro deveriam ser adotadas de forma integrada entre os
municípios que pertençam a uma mesma bacia hidrográfica.
Palavras-chave: lixo marinho, tartarugas marinhas, área de desova, praias urbanas.
ABSTRACT
The works about marine debris and its interaction with endangered
species are rare. Most of the works about such interaction is
information about approach or stranding of dead or alive animals in the
beach. There are no studies about debris carried to the beach and its
effects on the fauna that have part or all its life cycle in these
environments. In general, studies about debris in beach discuss mostly
about its social and economic aspects, its esthetic misdeeds that cause
economic and social value depletion of the environment, or its effects
to human health. Intermares beach (Paraiba – Brazil), even having an
intense urbanization, is an important nesting area for sea turtles in
Brazilian north-east coast. Environment contamination by debris may
imply in loss of reproductive habitat to sea turtles. Know the debris
profile in this reproductive pool is crucial to improve gesture and
conservation plans. And for such reason it has been done a research
about the profile of the debris found in the beach during the
reproductive season in 2006. Three collect points were selected,
corresponding to the center and the edges of the beach. For each one of
the points, was set up a 50 square meters area from the tide line, were
two people with 1 hour/day effort, realized 26 collections per area
during two months of the dry season. To observe the debris deposition
each 24 hours, the collections were realized 3 days in a row, being the
first one the day after the public cleaning. From the total of 78
samples, it has been obtained 6556 items, classified in plastic (80%)
organic matter (19.4%) metal (0.5%) and glass (0.4%). In a more
detailed way, the classification had 19 categories according to its use
and material, resulting in 56 products. There was no significant
difference between the types of items found in each point, but the
point 3 presented biggest debris concentration (47% of total). Organic
matter had the biggest distribution homogeneity, with average of 424.7
(± 21.1) units per point, except for coal, more concentrated in point
3, with 58.4% of collected units. Small plastic fragments (around 1.5
cm) called soft or hard plastic were abundant in strandline, suggesting
that it amount is given by tide action and its origin l from continent,
dragged by rivers and pluvial draining. Food leftovers, snacks and
cookies packages (26% of plastic) are most likely deposited by beach
visitors and are mostly found in points over the tide line.
Monofilament line was more abundant in point 1 (49% of collected units)
and were found mostly entangled to sea weed, and, with other fishing
related items, corresponded to 12.8% of total collected items. Sea
turtles are double affected by debris presence, because they also use
terrestrial environment. In the beach, debris can affect the
reproductive success of these animals, because it can obstruct the
access of the females to adequate nestling area, as much as block
neonate’s emergency and their way to sea. Food leftovers can attract
noxious animals as rats, which eat eggs and neonates of sea turtles;
they also can bring diseases to the fauna and human beings. In 6 years
of activity, Associação Guajiru monitored 670 hawksbill nests, in 180
(27%) of them, there were found plastic and organic matter. By the
found items profile, it can be attested that sea turtle neonates are
the most affected, because nylon strings and plastic fragments can
obstruct the egg chamber passageway and/or block their sea finding.
Debris mitigation and extirpation actions from sea and coastal
environment should be adopted in an integrated way by municipalities
localized in same hydrographic basins.
Keywords: marine debris, sea turtles, urban beach.
Araújo,
M.C.B. de & Costa, M. (2004) - Análise quali-quantitativa do lixo
deixado na baia de Tamandaré -PE-Brasil por excursionistas. Revista de
Gerenciamento Costeiro Integrado, 3:58-61. (disponível em http://www.gci.inf.br/edicoes_anteriores/03/17_turismo.pdf).
Araújo,
M.C.B. de & Costa, M. (2006) - The significance of solid wastes
with land-based sources for a tourist beach: Pernambuco, Brazil.
Pan-American Journal of Aquatic Sciences, 1(1):28-34.
Araújo,
M.C.B. de & Costa, M. (2007) - Visual diagnosis of solid waste
contamination of a tourist beach: Pernambuco, Brazil. Waste Management
27(6):833-839. (doi:10.1016/j.wasman.2006.04.018)
Ballance,
A., Ryan, P.G., & Turpie, J.K. (2000) - How much is a clean beach
worth? The imapct of litter on beach users in Cape Peninsula, south
Africa. South African Journal of Science 96:210-213.
Claereboudt,
W.R. (2004) - Shore litter along sandy beaches of the Gulf of Oman.
Marine Pollution Bulletin 49(9-10):770-777. (doi:10.1016/j.marpolbul.2004.06.004)
Convey,
P., Barnes, D.K.A & Morton, A. (2002) - Debris accumulation on
oceanic island shores of the Scotia Arc, Antártica: a review. Polar
Biology, 25(8):612-617. (doi: 10.1007/s00300-002-0391-x)
Debrot, A.O., Tiel, A.B. & Bradshaw, J.E. (1999) - Beach Debris in Curaçao. Marine Pollution Bulletin 38(9):795-801. (doi:10.1016/S0025-326X(99)00043-0)
Derraik,
J.G.B. (2002) - The pollution of the marine environment by plastic
debris: a review. Marine Pollution Bulletin 44(9):842-852. (doi:10.1016/S0025-326X(02)00220-5)
Frost,
A. & Cullen, M. (1997) - Marine debris on northern New South Wales
beaches (Australia): Sources and role of beach usage. Marine Pollution
Bulletin 34(5):348-352. (doi:10.1016/S0025-326X(96)00149-X)
Gilligan,
M.R., Randal, S.P., Richardson, J.P. & Kozel, T.R. (1992) - Rates
of Accumulation of Marine Debris in Chatham County, Georgia. Marine
Pollution Bulletin 24(9), 436:441. (doi:10.1016/0025-326X(92)90342-4 )
Laist,
D.W. (1997): Impacts of Marine Debris: Entanglement of Marine Life in
Marine Debris Including a Comprehensive List of species with
Entanglement and Ingestion Records. In: Coe, J.M. & Rogers, D.B.
(eds.), “Marine Debris: Sources, Impacts and Solutions”, pp 99-139.
Springer Series on Environmental Management, Springer-Verlag, New York.
(ISBN: 0387947590)
Laist, D.W., Coe, J.M.
& O’Hara, K.J. (1999): Marine Debris Pollution. In: John R. Twiss,
Jr. & Randall R. Reeves (eds.), “Conservation and management of
marine mammlas”. Smithsonian Institution Press.
(ISBN: 1560987782)
Madzena,
A. & Lasiak, T. (1997) - Spatial and temporal variations in beach
litter on the Transkei Coast of South Africa. Marine Pollution Bulletin
34(11), 900-907. (doi:10.1016/S0025-326X(97)00052-0)
Mascarenhas,
R., Guimarães-Santos, R., Souza, A. & Zeppelini, D. (2004) -
Nesting of Eretmochelys imbricata in Paraíba state –Brazil; testing a
new method to avoid light pollution effects. Marine Turtles Newsletter
104:1-3.
Mascarenhas, R., Santos, R. &
Zeppelini, D. (2005) - Stranded sea turtles on Coast of Paraiba -
Brazil. Marine Turtles Newsletter
117:13-14.
Mascarenhas,
R., Zeppelini-Filho, D. & Moreira, V.S. (2003) - Observations on
sea turtles in the state of Paraíba, Brazil. Marine Turtles Newsletter
101:16-18.
Moore, S.L., Gregorio, D.,
Carreon, M., Weisberg, S. B., & Leecaster, M. K. (2001) -
Composition and distribution of beach debris in Orange County,
California. Marine Pollution Bulletin 42(3):241-245. (doi:10.1016/S0025-326X(00)00148-X)
National
Resource Council (1990) - Decline of Sea Turtles: Causes and
Prevention. National Academy Press, Washington D.C.. (ISBN:
978-0309074698)
Novak, R. M. (1999) -
Walker’s mammals of the world. The Johns Hopkins University Press; 6th
edition, 2015p.. (ISBN: 978-0801857898)
Ribic, C.A. & Ganio, L.
(1996) - Power analysis for beach surveys of marine debris. Marine
Pollution Bulletin 32(7):554-557. (doi:10.1016/0025-326X(96)84575-9)
Santos,
I.R., Friedrich, A.C., Wallner-Kersanach, M. & Fillmann, G. (2005)
- Influence of socio-economic characteristics of beach users on litter
generation: a review. Ocean & Coastal Management 48(9-10):742-752.
(doi:10.1016/j.ocecoaman.2005.08.006)
Smith,
K.F. & Carpenter, S.M. (2006) - Potential spread of introduced
black rat (Rattus rattus) parasites to endemic deer mice (Peromyscus
maniculatus) on the California Channel Islands. Diversity and
Distributions, 12(6):742-748. (doi: 10.1111/j.1472-4642.2006.00279.x)
Sul,
J.A.I & Costa, M. (2007) - Marine debris review for Latin America
and the Wider Caribbean Region: from the 1970s until now, and where do
we go from here? Marine Pollution Bulletin, 54(8):1087-1104. (doi:10.1016/j.marpolbul.2007.05.004)
Tudor,
D.T., Williams, A.T., Randerson, A.E., & Earll, R.E. (2002) - The
use of multivariate statistical techniques to establish beach debris
pollution sources: Journal of Coastal Research, Special Issue
36:716-725.
Zeppelini, D., Mascarenhas, R. & Meire, G.G. (2007) - Rat Eradication as Part of a Hawksbill Turtle (Eretmochelys imbricata) Conservation Program in an Urban Area in Cabedelo, Paraíba State, Brazil. Marine Turtle Newsletter, 117:5-7.
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