Effect of crude oil on the development of white mangrove seedlings (Avicenia germinans) in the Niger delta, Nigeria



Document title: Effect of crude oil on the development of white mangrove seedlings (Avicenia germinans) in the Niger delta, Nigeria
Journal: Estudos de biologia
Database: PERIÓDICA
System number: 000341744
ISSN: 0102-2067
Authors: 1
1
2
1
Institutions: 1University of Science and Technology, Institute of Pollution Studies, Port Harcourt, Rivers. Nigeria
2University of Port Harcourt, Choba, Port Harcourt. Nigeria
Year:
Season: Ene-Dic
Volumen: 30
Number: 70-72
Pages: 77-90
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract Crude oil is a complex hydrogen whose introduction into the may be hazardous to aquatic and human life, and consequently a threat to natural resources. The severity of the impact of crude oil depends on a variety of factors, including characteristics of the oil itself, natural conditions, such as water temperature and weather, and the sensitivities of receiving or biota. Consequently, various types of biological resources such as mangrove seedlings have different sensitivities to oil spills. The long term persistence of oil in the environment may cause defoliation and possibly death. Recruitment of seedlings into the oiled area may also be affected. This study is designed to evaluate the acute and chronic effects of crude oil (Bonny Light) on the growth performance of mangrove seedlings in a laboratory condition; monitoring critical plant growth attributes such as stem height and diameter, leaf length, width and numbers of leaves (leaf production), senescence and seedlings survival, for sixteen weeks. The study revealed that the mangrove seedlings responded differently in growth attributes with varying treatment. Evidence of crude oil effects were remarkably demonstrated between control and acute (Wilcoxon sign –rank t-test (1.0) > P (0.29)0.05 and chronic (Wilcoxon sign – rank, t-test (1.0) > p (0.47)0.05. The mangrove critical growth responses by mangrove seedlings as a result of the treatments were further explained by the cluster and correspondence analyses
Portuguese abstract O petróleo é um hidrocarboneto complexo, cuja contaminação no meio aquático é perigosa para o ser humano e, consequentemente, danosa para as fontes de recursos naturais. A severidade do impacto depende de diferentes fatores, tais como a composição do próprio petróleo, condições naturais (como condições climáticas, temperatura da água, pH, salinidade, entre outros). Nesse contexto,considerando os manguezais, diferentes plantas estão sendo afetadas pela exposição de longa data a esse contaminante, principalmente as plantas jovens, muito sensíveis a esse fenômeno. O objetivo deste estudo foi avaliar os efeitos agudos e crônicos do petróleo (leve) sobre o crescimento, em laboratório, de mudas de plantas do mangue. Foram monitorados, durante seis semanas, diferentes parâmetrosdo vegetal, como o crescimento da planta, a altura e o diâmetro do caule, o comprimento das folhas, o formato e o número de folhas, a senescência e sobrevivência dos exemplares. O estudo revelou que as plantas jovens foram afetadas no seu crescimento durante o tratamento com o hidrocarboneto. Esse fato foi confirmado estatisticamente ao comparar-se o grupo controle com o grupo que recebeu adosagem aguda (Wilcoxon – teste t (1,0) > p (0,29)0,05 e o grupo controle comparado com o tratamento crônico (Wilcoxon – teste t (1,0) > p (0,47)0,05. Portanto, ocorre um prejuízo em todo o manguezal da região do delta do Níger, fenômeno observado ao estudar-se as plantas jovens, mais suscetíveis à contaminação pelo petróleo
Disciplines: Biología
Keyword: Botánica,
Ecología,
Fisiología vegetal,
Avicennia germinans,
Plántulas,
Mangle,
Contaminación,
Petróleo crudo,
Delta del Níger,
Nigeria
Keyword: Biology,
Botany,
Ecology,
Plant physiology,
Avicennia germinans,
Mangrove,
Seedlings,
Contamination,
Crude oil,
Niger delta,
Nigeria
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