Mystery Rosy Ooze on Secluded Tasmanian Shoreline Prompts Concerns of Possible Phytoplankton Proliferation
Authorities in the island state are attempting to pinpoint a pink slime that has appeared on a secluded beach, with some scientists anxious it could be an algae outbreak.
Widespread Occurrence Across Shore
The pink-tinged sludge was found on a section of a coastal area about 37 miles south of Hobart. A similar sludge has also been noted on areas of a nearby shore and an additional coastal site.
Specimens Taken for Analysis
Specimens have been taken and sent to the Environment Protection Authority for analysis. A spokesperson stated that "algae outbreaks are a natural event in reaction to variations in food sources, heat, precipitation or light".
"These blooms are occasionally called red or pink tides because the outbreaks can turn the water red," the representative added. "Only some algae outbreaks are dangerous, with numerous types acting as a major source of food for animals in the aquatic ecosystem."
"The usual source of crimson tides in Tasmanian waters is the marine phytoplankton Noctiluca scintillans, which can cause glowing light shows at night."
Rising Frequency Connected to Global Warming
Phytoplankton proliferations are natural events but their frequency has grown in recent years, partially due to climate change and pollution that combine to create food-loaded oceans primed for the fast proliferation of dinoflagellates.
Dinoflagellates are a type of algae that normally function as the ocean's garbage cleaners. During a bloom, there is a quick expansion in their populations that interferes with the healthy balance of ecosystems.
These phenomena have been likened to underwater bushfires and can persist in growing as long as the environment is suitable. In severe cases, vulnerable aquatic environments can be devastated as aquatic animals is eliminated or suffocated, offering more nutrients for the proliferation.
Recent Devastating Event in South Australia
Another region not long ago confronted a catastrophic phytoplankton proliferation along its southern shore after a string of sea temperature spikes, which expanded across a vast area. The outbreak caused swimmers with irritated eyes and severe coughing and may have caused the death of up to a quarter-million sea creatures across hundreds of species, according to government calculations.
Scientist Opinion on the Local Case
A marine expert, who assisted in examining the start of that event said, based on photos of the local event, the most likely species involved was Noctiluca scintillans, a type of dinoflagellate also known as "ocean glitter".
"There have been numerous of these outbreaks around Tassie of late," she remarked.
The scientist explained the algae did not produce poisons comparable to the organism involved in South Australia's severe outbreak, but it does ingest microscopic animals and "many fish eggs", meaning aquatic creatures were particularly vulnerable.
"Typically one notices a outbreak of this algae after a proliferation of a different species, or an event such as a salmon or coral spawning event," she said.
Demands for Action and Safety Concerns
A marine scientist, who gathered specimens of the rosy slime in Tasmania, said it appeared the possible outbreak had "increased notably" and suggested the salmon farming industry was the most likely culprit, pointing to similar cases overseas.
"Therefore Tasmania needs to deliver a clear message here, the government and the regulators need to react to this. We need to analyse the samples we've gathered and we need to inform the people here," she said.
She said she had anxieties for public safety after experiencing a prickling feeling along her arms and face while being sprayed with tainted seawater.
Reports of Deceased Sea Creatures and Calls for Official Intervention
An environmental foundation has stated dead octopus and dead sea cucumbers being found on the beach, with a longtime environmental campaigner describing the event as an "environmental emergency" and calling on the local leader to see and "lead the response that officials must be undertaking".
"The leader needs to know this is a disaster in the happening, economically as well as environmentally."
Government Response
Addressing journalists, the premier commented he was uninformed of any connections between the event and the farming business, emphasizing scientific testing was needed before determinations could be drawn.
"We must make certain our aquatic environments are ecologically sound and viable," he added.
"Our coastal assets across the state are our resources and we need to ensure the community and our economy can live together to enjoy our waterways efficiently and in a lasting way."