Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 

High-altitude moss feels at home in the lab

Scientists have recreated typical Indonesian climatic conditions in a New Zealand laboratory as part of a major environmental project in Irian Jaya.

HortResearch scientist Jill Stanley and colleague Rowan Buxton from Landcare are looking at the possibility of using moss to help return land affected by copper mining to its natural state.

Field trials are being carried out 2,200m above sea level at the mine, but the scientists are also using the National Climate Laboratory at Palmerston North to fast-track the project.

The computer-controlled Climate Lab can replicate conditions from sub-Antarctic to tropical at the touch of a button, so weather conditions at the mine posed to problem. Despite being near the tropics, high altitude brings the ambient temperature down, light levels are low and there's rain almost every day.

The mine operators, PT Freeport Indonesia, are committed to restoring 2,000 acres to natural native vegetation but the rock- strewn ground is low in nutrients and organic matter, so revegetation is difficult and slow. Transplanting native species is time consuming and there is a low survival rate.

Mosses are often the first plants to establish on the surface and other plants grow up through them. PT Freeport Indonesia thought it would be a good idea to deliberately establish mosses in an attempt to speed up the revegetation process.

The Climate Lab trials will help to establish protocols for speeding up moss development. Samples were sent from Irian Jaya and planted out in the lab. So far a number of species have shown good early growth on a number of rock types and there are indications that application of phosphorus encouraged moss growth.

"The fast growth on some plots is very encouraging," said Jill. "The fact that trends are already emerging suggests we are on track for selecting a restricted number of protocols for moss revegetation for field testing at the end of this trial.

"It appears that there may be interactions between individual moss species and the fertilisers, propagation methods and covers used. These interactions will need to be considered carefully when combinations are selected for each rock type."

Jill and Rowan visited the mine last year to see experimental plots and also to visit nearby glaciers.

"It was the most exciting field trip I've ever had," said Jill. "It's important and interesting work. If we can help to restore the landscape then that's a very positive thing."


ends

© Scoop Media

 
 
 
Business Headlines | Sci-Tech Headlines

 

Retail: International Websites To Pay GST

New rules would be aimed at imported goods valued at or below $1,000. Customs would retain responsibility for collecting GST on imported parcels valued more than $1,000. More>>

ALSO:

High-Level Advice: PM’s Business Advisory Council Membership Announced

The Prime Minister’s Business Advisory Council brings together a mix of experts, six women and seven men with small to large business experience, from across New Zealand, to provide advice. More>>

ALSO:

Improving: Report Shows New Zealand Air Quality 'Good'

Our air 2018, produced by the Ministry for the Environment and Stats NZ, shows that while some previously known issues persist, progress has been made and levels of some pollutants are declining. More>>

ALSO:

Greenpeace: Govt Extends OMV Exploration Permit

The Government has just granted oil giant OMV a two-year extension to drill in the Great South Basin, despite issuing a ban on new oil and gas exploration permits in April. More>>

ALSO:

Collective Bargaining For Contractors: Working Group's Model For Screen Sector

A recommended model to allow collective bargaining for contractors in the screen sector has today been unveiled by the Government-convened Film Industry Working Group. More>>

ALSO:

Kauri Dieback: DOC Closing Tracks To Protect Trees

The Department of Conservation will close 21 tracks across kauri land to help prevent the spread of kauri dieback. An additional 10 tracks will also be partially closed and the open sections upgraded... More>>