Human Disturbance, Natural Resilience and Management Futures: The Coral Reefs of Todos Os Santos Bay, Bahia, Brazil

Dutra, Leo X.C.; Haworth, Robert

doi:10.5539/jsd.v1n1p13

Cited by 6 publications

(9 citation statements)

References 63 publications

(65 reference statements)

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“…Changes in the community may be triggered by natural or anthropogenic disturbances (Connell & Sousa ; Minchinton ); in the BTS the phase shifts are thought to be linked to a number of human stressors (Dutra & Haworth ), which may have synergistic effects. Reporting on surveys carried out within the TSB in 2003, Dutra et al .…”

Section: Resultsmentioning

confidence: 99%

“…Changes in the community may be triggered by natural or anthropogenic disturbances (Connell & Sousa 1983;Minchinton 2007); in the BTS the phase shifts are thought to be linked to a number of human stressors (Dutra & Haworth 2008), which may have synergistic effects. Reporting on surveys carried out within the TSB in 2003, Dutra et al (2006) suggested that human impacts may have been responsible for the loss of the coral species Mussismilia braziliensis and Meandrina braziliensis, the hydrocoral Millepora nitida and all octocorals.…”

Section: Resultsmentioning

confidence: 99%

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Evidence of a phase shift to Epizoanthus gabrieli Carlgreen, 1951 (Order Zoanthidea) and loss of coral cover on reefs in the Southwest Atlantic

et al. 2014

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There is at present a ‘coral reef crisis’; one of the more drastic consequences of this is a phase shift, in which reef‐building corals are replaced by non‐reef building benthos such as macroalgae and soft corals. Previous studies have principally focused on the shift to macroalgae. Our goal was to investigate whether the dominance of the zoanthid Epizoanthus gabrieli on some reefs of Todos os Santos Bay, Brazil, represented a non‐algal phase shift. In 2003, we identified a high cover of this species on two reefs (52% and 70%), but only in 2007 was it possible to confirm a reduction in coral cover. This dominance has persisted for over 9 years, characterizing a true phase shift. This loss of coral cover may be a result of anthropogenic disturbances within the bay; however, given the large number of human impacts, further studies are needed to identify specific causes of this shift. Although there are some reports of phase shift involving species pertaining to the Class Anthozoa, this is the first report of this phenomenon involving the order Zoanthidea.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Evidence of a phase shift to Epizoanthus gabrieli Carlgreen, 1951 (Order Zoanthidea) and loss of coral cover on reefs in the Southwest Atlantic

et al. 2014

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“…In China this may be because of a lack of will perhaps due to production pressures or a lack of knowledge, whereas in Poland this is really due to the lack of deployment of knowledge and a fear of punishment for asking for money to improve the system. Rather than the socio-cultural resilience of an organization, with the ability to absorb changes and still function, proposed by Dutra and Hayworth (2008), the study factories exhibited a socio-cultural resistance to change which will prejudice it's own and other sustainability's.…”

Section: Sewage and Waste Arisings And Effectsmentioning

confidence: 94%

Closing the gap – the Perception and Reality of Environmental and Waste Performance in Chinese and Polish Industry

Craig¹,

Lemon²

2009

ASS

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This paper is derived from research into the management of industrial and process waste in twelve large manufacturing factories in China and Poland. The research incorporates a unique methodology involving the expert benchmarking of environmental impacts, the use of questionnaires to elicit perceived environmental performance and, related to the same impacts, interviews across the complete management strata of each factory.Sustainability is considered in the context of waste arising from production processes, including waste chemicals and scrap materials, and non-production wastes such as human ordure and detergents. Process waste results in an unsustainable depletion of raw materials, while human and non-production waste results in the unsustainable and irresponsible use of the atmosphere, ground, groundwaters and rivers.The paper highlights the management of hazardous industrial waste as one area where an organizational fear and punishment culture is seen to restrict decisions to clearly defined job boundaries in such a way that flexible decision making is avoided and environmental management restricted to compliance rather than improvement and sustainable materiel use.

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“…Para os metais-traço (Zn, Cu, Cr, Ni e Pb), avaliados em uma mesma região da Austrália, Goniastrea aspera 50,51 exibiu muito mais Zn em seu esqueleto do que Pocillopora damicornis. 22,50 No mar arábico, Montipora digitata 53 Outros fatores, como o aumento do aporte de íons metálicos para esta região, também podem ter contribuído para o desaparecimento destas espécies. As espécies mais resistentes a condições estressantes observadas na Baía de Todos os Santos foram Montastrea cavernosa e Siderastrea stellata.…”

Section: Utilização De Corais Como Organismos Biomonitoresunclassified

Corais como organismos biomonitores: aplicação, pré-tratamento e determinação de elementos majoritários e minoritários

et al. 2012

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Recebido em 13/5/11; aceito em 3/10/11; publicado na web em 4/1/12 CORALS AS BIOMONITORS: APPLICATION, PRE-TREATMENT AND DETERMINATION OF MAJOR AND TRACE ELEMENTS. Corals incorporate major and trace elements in their tissues and skeletons, acting as good proxies for contaminant inputs over time. This incorporation occurs by a variety of mechanisms and depends on the bioavailability of elements. Corals are very susceptible to metal contamination during sample collection. As such, pre-treatment procedures need to include a decontamination step. The high Na and Ca concentrations in the matrix make the determination of trace metals an analytical challenge. The present paper reviews all the information published on coral sample pretreatments, metal determinations in corals, and also discusses the use of coral to monitor metal contamination.Keywords: monitoring; contamination; CaCO 3 matrix. INTRODUÇÃONo ambiente aquático, elementos presentes em nível traço e em concentrações maiores podem ocorrer na fração dissolvida, coloidal, associados ao sedimento (material particulado e de fundo) e também aos tecidos biológicos. Os metais, em especial Cd, Pb e Hg, afetam a biota marinha, tanto pela mobilização das espécies metálicas, da fração particulada para a dissolvida, seguida pela assimilação da fase aquosa, como por meio da ingestão de sedimentos pela macrofauna bentônica, seguida da assimilação dos metais pelos intestinos. 1Os íons metálicos ocorrem nas formas livres, como complexos simples, com ligantes inorgânicos, quelatos, e ligantes orgânicos multidentados, adsorvidos na superfície de partículas. Os ligantes orgânicos podem ocorrer naturalmente, na forma de macromoléculas (e. g. proteínas, polissacarídeos, lipídios, lignina), contendo muitos sítios de ligação, ou como moléculas pequenas de origem antropogênica (e. g. cianetos, fluoretos, amônia).2 Os íons metálicos ligam--se à matéria orgânica, através do processo de quelação, formando complexos ou compostos de coordenação, que, eventualmente, se precipitam para o sedimento de fundo, afetando a biodisponibilidade dos elementos majoritários e minoritários. Os sedimentos de fundo são um depósito importante de contaminantes, não apenas de metais, mas também de contaminantes orgânicos, como os hidrocarbonetos policíclicos aromáticos. A ressuspensão de sedimentos de fundo contaminados pode contribuir para o aumento da biodisponibilidade de contaminantes para os organismos aquáticos, 3 atuando como fonte de contaminantes para a coluna d'água.A biodisponibilidade de espécies metálicas, numa perspectiva ambiental, pode ser definida como a concentração de metais livres e disponíveis na água ou associada aos sedimentos, sendo passíveis de incorporação, ao longo do tempo, aos tecidos dos organismos, por todas as vias, e podendo bioacumular e causar efeitos tóxicos. A bioacumulação, por sua vez, é o acúmulo líquido de um ou mais elementos-traço nos tecidos de um organismo, como resultado do consumo de todas as rotas ou fontes disponíveis de alimento (e. g. água, sedimento etc.)...

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Human Disturbance, Natural Resilience and Management Futures: The Coral Reefs of Todos Os Santos Bay, Bahia, Brazil

Cited by 6 publications

References 63 publications

Evidence of a phase shift to Epizoanthus gabrieli Carlgreen, 1951 (Order Zoanthidea) and loss of coral cover on reefs in the Southwest Atlantic

Evidence of a phase shift to Epizoanthus gabrieli Carlgreen, 1951 (Order Zoanthidea) and loss of coral cover on reefs in the Southwest Atlantic

Closing the gap – the Perception and Reality of Environmental and Waste Performance in Chinese and Polish Industry

Corais como organismos biomonitores: aplicação, pré-tratamento e determinação de elementos majoritários e minoritários

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