Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search


Short-lived algal blooms on Lake Rotoiti


Short-lived algal blooms on Lake Rotoiti

For immediate release: Tuesday 9 December 2003

Lake Rotoiti has started to develop its first algal blooms of the summer but so far they are sporadic, localised and do not last long, says Environment Bay of Plenty.

The latest tests show harmful blue-green algae are beginning to build up in the lake, which was shut down by algae-prompted health warnings in late January this year.

Paul Dell, the regional council’s group manager of regulation and resource management, says it is too soon to tell whether blooms will be as intense as last summer. A lot will depend on the weather, he says.

Recent hot, still conditions encourage algal growth and “have not helped the situation at all”. But windy conditions are predicted before Christmas, which may help stall the development of any future blooms, he adds.

Environmental scientist Matthew Bloxham, who runs Environment Bay of Plenty’s blue-green algae sampling programme, says the start of the summer has been an uncertain period. “Blue-green algae numbers are beginning to build and there have been intermittent, localised blooms. But they have not lasted long.”

Last week’s monitoring shows a general rise in algae counts in Lake Rotoehu, no significant change in Lake Rotorua and notable increases, followed by falls, at a handful of sites around Lake Rotoiti. Okawa Bay continues to build slowly, while Te Weta Bay and Okere Arm are fairly static.

Environment Bay of Plenty will be sampling blue-green algae from five different lakes over summer, most of them weekly. Lakes Okataina and Tarawera are included this year. More lakes and sites within some of these lakes will be tested more frequently, Mr Bloxham adds.

However, he warns, people still need to check the water to see if it’s safe before using it for recreation. “Wind can sweep large amounts of algae into a bay over a matter of hours, causing it to build up to dangerous levels. People should assess lake conditions carefully before getting into the water, even if there are no warnings in place.”

Generally, if the water looks milky green or is a dirty brown colour, or has globules floating in it, play it safe.

Lake users can check the current status of blue-green algae warnings in a lake or bay on www.envbop.govt.nz.


© Scoop Media

Parliament Headlines | Politics Headlines | Regional Headlines

Supreme Court: Worksafe Decision On Whittall Pike River Prosecution Unlawful

The question in issue on the appeal was whether WorkSafe New Zealand acted to give effect to an unlawful agreement of this nature when it offered no evidence on charges against Peter William Whittall for breaches of the Health and Safety in Employment Act 1992...

The Supreme Court... has found that the decision to offer no evidence was made under an unlawful agreement to stifle prosecution. It has granted a declaration to that effect. More>>


Cullen To Chair: Tax Working Group Terms Of Reference Announced

Finance Minister Grant Robertson and Revenue Minister Stuart Nash today announced the Terms of Reference for the Tax Working Group and that the Group will be chaired by Sir Michael Cullen. More>>


Gordon Campbell: On The New Pike River Agency (And The Air Strike Wing)

Much of the sympathy the public still feels for the families of the Pike River miners has been sustained by the sense that the previous government – let alone the mining company and the processes of receivership and litigation – has never dealt honestly, or fairly, with them. More>>


Not Going Swimmingly: Contractor Cut, New Dates For Christchurch Sports Centre

“As an incoming Minister, I have been conducting a thorough review of progress on the Anchor projects and to learn of a $75 million budget blowout on this project was very disappointing..." More>>


Tertiary: Allowances, Loan Living Costs To Get Boost

“From 1 January, student allowance base rates and the maximum amount students can borrow for living costs will rise by a net $50 a week,” says Education Minister Chris Hipkins... further adjusted from 1 April 2018 in line with any increase in the CPI. More>>


Foreign Affairs: Patrick Gower Interviews Jacinda Ardern

Prime Minister Jacinda Ardern says discussions have already begun on how to bring climate change refugees into New Zealand under a Pacific seasonal employment plan... More>>


Gordon Campbell: On The Centre Right’s Love Of ‘Nanny State’

You’d almost think it was 2005 again. That was a time when the rugged individualists of the centre-right were being beset by government regulations on the nature of light-bulbs, the size of shower heads, the junk food available at school tuck shops and other such essentials... More>>




Featured InfoPages

Opening the Election