Puzzling Pink Slime on Isolated Tasmanian Coast Spurs Concerns of Potential Algal Bloom
Officials in Tasmania are working to identify a pink slime that has appeared on a isolated coast, with a number of researchers concerned it could be an phytoplankton proliferation.
Extensive Occurrence On Beaches
The rosy-colored ooze was found on a portion of a southern bay about 60 kilometers south of the city. A comparable ooze has also been documented on areas of Little Roaring Beach and a separate bay.
Samples Collected for Testing
Examples have been gathered and submitted to the environmental agency for analysis. A representative commented that "algal blooms are a natural occurrence in reaction to shifts in food sources, heat, rain or sunlight".
"They are occasionally called reddish tides because the blooms can change the water crimson," the spokesperson noted. "Only some algae outbreaks are toxic, with numerous types serving as a major source of nourishment for creatures in the aquatic ecosystem."
"The most common cause of red tides in these seas is the marine phytoplankton Noctiluca scintillans, which can create luminous nighttime effects at night."
Rising Frequency Associated with Climate Change
Algae outbreaks occur naturally but their frequency has grown in the past few years, partly due to environmental shifts and pollution that combine to create food-loaded oceans primed for the rapid spread of dinoflagellates.
Dinoflagellates are a phytoplankton species that typically serve as the ocean's detritus consumers. During a bloom, there is a fast increase in their numbers that interferes with the normal functioning of marine environments.
These phenomena have been likened to underwater bushfires and can continue to grow as long as circumstances are favorable. In worse situations, vulnerable aquatic environments can be destroyed as aquatic animals is eliminated or suffocated, supplying more minerals for the outbreak.
Past Devastating Outbreak in South Australia
Another region recently grappled with a catastrophic algae outbreak along its southern shore after a succession of oceanic warm spells, which spread across thousands of square kilometres. The outbreak resulted in swimmers with eye irritation and hacking coughs and may have killed up to 250,000 marine animals across 400 different species, according to government calculations.
Scientist Analysis on the Local Event
An estuarine ecologist, who was involved in studying the start of the previous algal bloom stated, based on images of the current situation, the most likely species involved was Noctiluca scintillans, a kind of dinoflagellate also known as "marine shimmer".
"There have been many of these events around Tassie of late," she added.
The expert stated this organism did not generate toxins comparable to the type involved in South Australia's harmful outbreak, but it does consume microscopic animals and "numerous fish eggs", meaning aquatic creatures were most at risk.
"It's common to observe a bloom of the organism after a outbreak of a different species, or something like a salmon or coral spawning event," she noted.
Calls for Response and Public Safety
Lilly Henley, who collected samples of the pink sludge in the state, stated it looked like the possible outbreak had "expanded greatly" and indicated the salmon farming industry was the primary suspect, citing similar cases overseas.
"Therefore the state needs to issue a clear message here, the officials and the EPA need to respond to this. We need to analyse the samples we've gathered and we need to inform the public here," she said.
Henley expressed she had worries for people's well-being after feeling a tingling sensation along her limbs and skin while being sprayed with affected seawater.
Accounts of Lifeless Animals and Demands for Government Response
An advocacy organization has stated deceased sea creatures and deceased marine life washing ashore, with a veteran activist describing the event as an "natural disaster" and urging the state premier to visit and "lead the response that government must be making".
"The leader needs to realize this is a disaster in the happening, commercially as well as for nature."
Official Reaction
Talking with journalists, the leader stated he was uninformed of any connections between the event and the farming business, saying scientific testing was necessary before conclusions could be drawn.
"We need to ensure our waterways are ecologically sound and sustainable," he added.
"Our coastal assets across Tasmania are our assets and we need to guarantee the community and our economy can coexist to utilize our aquatic resources effectively and responsibly."