Algae

Latest news

NIWA scientists are hoping they may one day be able to “listen” to kelp forests in the waters around New Zealand to find out how they are faring.
Cathy Kilroy is quick to admit she’s a person who doesn’t like throwing anything away.
A hot and steamy summer saw Kiwis heading down to rivers and lakes to cool off. But they weren’t the only ones enjoying the warmer weather – algae had a great time too.
Do you know where in New Zealand to find Neptune’s necklace or rimurapa? Or how to tell apart Carpophyllum from Cystophora?

Our work

The seaweed known colloquially as nori in Japanese - used for making sushi - or karengo in Maori has been reclassified by an international team of scientists including NIWA's Dr Wendy Nelson.
This research project investigated whether the mechanisms for periphyton removal in rivers relate more directly to hydraulic and geomorphic conditions than flow metrics.

This project will demonstrate the commercial feasibility of producing bio-oil by the conversion of algae biomass that has been grown in wastewater treatment facilities. In particular we aim to maximise algae production in High Rate Algal Ponds (HRAP) by adding carbon dioxide, and demonstrate energy efficient conversion of algal biomass to bio-oil.

This competition aims to provide Year 7-13 students in the Queenstown Lakes and Central Otago Districts region with an opportunity to get creative and visually tell us about their relationship with the lakes and how the invasive weed, lagarosiphon, is affecting them
NIWA scientists are hoping they may one day be able to “listen” to kelp forests in the waters around New Zealand to find out how they are faring.
Cathy Kilroy is quick to admit she’s a person who doesn’t like throwing anything away.
A hot and steamy summer saw Kiwis heading down to rivers and lakes to cool off. But they weren’t the only ones enjoying the warmer weather – algae had a great time too.
This research project investigated whether the mechanisms for periphyton removal in rivers relate more directly to hydraulic and geomorphic conditions than flow metrics.
Do you know where in New Zealand to find Neptune’s necklace or rimurapa? Or how to tell apart Carpophyllum from Cystophora?
An interactive guide to the large brown seaweeds of New Zealand.
Identifying creepy crawlies in your local stream just got a whole lot easier and faster, thanks to a new 3D identification system developed by a NIWA researcher.
The seaweed known colloquially as nori in Japanese - used for making sushi - or karengo in Maori has been reclassified by an international team of scientists including NIWA's Dr Wendy Nelson.
A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.
This identification guide covers the common crustose coralline algae found in central New Zealand.

Next time you bring home fish and chips, consider a sprinkling of health-giving seaweed.

NIWA scientists are in the pink! They’re studying the deep candy pink or purple coralline algae, abundant around the New Zealand shoreline and throughout the world, which play a vital role in marine ecosystems.

Scientists at NIWA have identified the source of the giant plankton bloom featuring in spectacular NASA satellite images.

A world leading research project demonstrating wastewater conversion to bio-oil.

Ocean acidification is the name given to the lowering of pH of the oceans as a result of increasing carbon dioxide (CO2) in the atmosphere.
Blooms of hazardous cyanobacteria (blue-green algae) in rivers, lakes and reservoirs can cause problems for both animal and human health. How can you find out whether an algal bloom is potentially toxic?

This project will demonstrate the commercial feasibility of producing bio-oil by the conversion of algae biomass that has been grown in wastewater treatment facilities. In particular we aim to maximise algae production in High Rate Algal Ponds (HRAP) by adding carbon dioxide, and demonstrate energy efficient conversion of algal biomass to bio-oil.

Applying the science: didymo

Didymo predictive maps, quantifying the potential threat from didymo to any river reach in New Zealand, are now in use, thanks to work by NIWA scientists. Potential percentage didymo cover and mat thickness can be mapped, based on models combining what is known about didymo biology with specific river and climate features.

Epic Antarctic voyage complete: analysis begins

Applying the science: didymo

Major port biosecurity surveillance underway

What risk from alien fish?

Didymo round-up

As of October, didymo had been detected in 56 South Island rivers. NIWA has recently wrapped up several major didymo studies commissioned by MAF Biosecurity New Zealand (MAFBNZ) to better understand its likely spread, its ecology, and impact, and test potential control methods.
Predicting didymo’s distribution and growth
The latest model on habitat suitability for didymo growth, based on new survey data from 145 South Island sites, shows a similar general pattern to the 2005 didymo Likely Environments Map (LEM), with South Island rivers much more susceptible than North Island rivers.

Awards, awards, awards

Wendy received the award and lifetime membership of the NZ Marine Sciences Society. (Photo: Alan Blacklock, NIWA)

Dr Wendy Nelson, NIWA’s Taxonomy and Systematics Science Leader, has been awarded the prestigious New Zealand Marine Sciences Award in recognition of her continued and outstanding contribution to marine science in New Zealand.
Wendy is New Zealand’s foremost expert on seaweeds, and has devoted her career to research, education, and marineconservation. At NIWA she leads an active algal taxonomy research group and a large marine biodiversity research programme.

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All staff working on this subject

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Principal Scientist - Aquatic Pollution
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Marine Biogeochemistry Technician
Wastewater Scientist
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Marine Biologist (Biosecurity)
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Marine Biologist
Algal Ecologist
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Enviromental Chemistry and Toxicology Technician
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