Blooms of the cyanobacterium Lyngbya majuscula in coastal waters of Queensland, Australia (Page 1)

Blooms of the cyanobacterium Lyngbya majuscula in coastal waters of Queensland, Australia

Dennison WC, O'Neil JM, Duffy EJ, Oliver PE, and Shaw GR ·
1999

Several coastal areas in southeast Queensland, Australia have been affected by blooms of the cyanobacterium Lyngbya majuscula Gomont ("Mermaid hair"). Lyngbya majuscula blooms have caused respiratory irritation, eye inflammation and severe contact dermatitis in fisherman and swimmers as well as causing reduced fish catch, seagrass loss and localized inputs of nitrogen through nitrogen fixation.


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Effect of Hydric Soil Disturbance on Ecological Health of Coastal Waters (Page 1)

Effect of Hydric Soil Disturbance on Ecological Health of Coastal Waters

Dennison WC, O' Neil JM, Jones AB, Costanzo SD, Hewson I, and Prange JA ·
1999

Soil disturbance in coastal regions could be linked to a variety of deleterious environmental impacts. The existing data are preliminary, but there is sufficient evidence to raise the issue to a higher priority for both research and management.


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Seagrass survival during pulsed turbidity events: the effects of light deprivation on the seagrasses Halodule pinifolia and Halophila ovalis (Page 1)

Seagrass survival during pulsed turbidity events: the effects of light deprivation on the seagrasses Halodule pinifolia and Halophila ovalis

Longstaff BJ and Dennison WC ·
1999

Pulsed turbidity events caused by factors such as flooding rivers have the potential to seriously impact seagrass communities by depriving the plants of all available light. The effects of light deprivation was investigated on the survival, morphology and physiology of the tropical seagrasses Halodule pinifolia and Halophila ovalis growing in the South-East Gulf of Carpentaria, Australia, a region where pulsed flood events are common.


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Seagrass and sediment nutrients: Species comparison and fertilisation responses of P. australis at Rottnest Island, Western Australia (Page 1)

Seagrass and sediment nutrients: Species comparison and fertilisation responses of P. australis at Rottnest Island, Western Australia

Udy JW and Dennison WC ·
1999

Seagrasses, marine angiospenns with high rates of primacy productivity, are often hmned by the supply of nutrients or light. We investigated the ambient sedirncnt nutrient availability, biornass, growth and physiological characteristics of five seagrass species common around Rottnest lsland (P. australis, P. sinuosa, A. antarctica, A. griffithii and H. ovalis).


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Sydney rock oyster, Saccostrea commercialis (Iredale & Roughley), filtration of shrimp farm effluent: the effects on water quality (Page 1)

Sydney rock oyster, Saccostrea commercialis (Iredale & Roughley), filtration of shrimp farm effluent: the effects on water quality

Jones AB and Preston NP ·
1999

Shrimp pond effluent water can contain higher concentrations of dissolved nutrients and suspended particulates than the influent water. Consequently, there are concerns about adverse environmental impacts on coastal waters caused by eutrophication and increased turbidity. One potential method of improving effluent water quality prior to discharge or recirculation is to use bivalves to filter the effluent.


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Effects of light deprivation on the survival and recovery of the seagrass Halophila ovalis (RBr) Hook (Page 1)

Effects of light deprivation on the survival and recovery of the seagrass Halophila ovalis (RBr) Hook

Longstaff BJ, Loneragan NR, O'Donohue MJ, and Dennison WC ·
1999

Survival and recovery of the seagrass Halophiln ovalis (R.Br.) Hook during and after light deprivation was investigated to assist in the interpretation of recent losses of Halophiln spp. in Queensland, Australia. Light deprivation experiments were conducted in outdoor aquaria and in situ at two water depths. Halophiln ovalis plants were deprived of light for a maximum of 30 days, and recovery processes were investigated for up to 18 days following 15 days of light deprivation.


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