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

 


NZ mountain plants may depend on declining kea, UC lecturer

NZ mountain plants may depend on declining kea, UC lecturer says

November 1, 2012

Over summer many holiday trampers will get close up views of New Zealand’s most charismatic bird, the kea.

However a University of Canterbury lecturer, Dr Ximena Nelson, said plants in New Zealand’s mountains are under threat as kea numbers continue to decline.

Dr Nelson said kea numbers were diminishing which could be bad news for about 12 percent of New Zealand’s alpine plants that rely on kea for seed dispersal.

``Kea are mischievous and lovable and also threatened, in part because we persecuted them for decades. From the late 1800s until 1971, the government placed a bounty on kea beaks. In the 1920s, the bounty was 10 shillings per beak, equating to $65 today.

``After an estimated 150,000 kea were killed, the wholesale bloodshed ended in a full protection for the species in 1986. However, kea sometimes do still fall foul of a bullet and now it is likely than there are considerably less than 5000 birds left.

``All of this was because of this birds’ powerful beak, which can occasionally cause a sheep’s death. However, this beak is not only destructive, but also has the power to give life,’’ Dr Nelson said.

Laura Young, a PhD student at UC, has also investigated the foraging behavior of kea and found that they spend a large proportion of their time eating fruit. New Zealand’s mountains have an unusually high proportion of fruit-bearing plants, making fruit an ideal food for the world’s only alpine parrot.

However, to maintain genetic viability the plants need to disperse their seeds and there are few remaining native species that may be able to do the job, Dr Nelson said.

Previously it had been assumed that like other parrots, the kea’s beak would make mincemeat of the seeds contained in the fruit that they eat, thereby contributing little to seed dispersal.

``Laura’s work showed that kea selected more fruiting species, consumed more fruit and dispersed more seeds than all other birds seen in the mountains combined. When she looked carefully at the seeds contained in hundreds and hundreds of kea faeces, she found that in fact almost all seeds were intact.

``Furthermore, kea are the only species that make frequent long-distance flights within and between mountain ranges. Hence, much of the effective long-distance dispersal of the alpine flora may be currently performed by kea.

``The fact that kea are able to ingest fruit and rarely crush seeds despite their powerful curved ‘parrot’ beak is noteworthy. These large birds can damage motor vehicles, buildings and signs, yet they can manipulate delicate items with considerable dexterity, providing another good reason to cherish these clever birds.’’

In addition to illegal hunting and pet trade activities, other major threats to kea populations include predation, competition for resources with introduced mammals and humans, lead poisoning and habitat degradation, Dr Nelson said.

Both Dr Nelson and Young are continuing research into kea, listed as a nationally endangered species.

Photos: UC’s Laura Young

and Ximena Nelson


Click for big version.

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Media: Fairfax Moves To Create Modern Newsroom

Fairfax Media New Zealand continues its newsroom transformation this week, with a proposal to further organise its editorial operations into focused, local teams and specialist national topic areas. More>>

ALSO:

Dairy: Fonterra Forecast For 2015/16 Season

Fonterra Co-operative Group Limited has today reduced its forecast Farmgate Milk Price for the 2014/15 season to $4.40 per kgMS. Along with its previously announced forecast dividend range of 20-30 cents per share, the change amounts to a forecast ... More>>

ALSO:

BusinessDesk: SkyCity Lifts Minimum Convention Centre Investment To $430M

SkyCity Entertainment Group, the casino operator, has lifted the minimum it will invest in the Auckland International Convention Centre to $430 million and said total costs including land may be $450 million to $470 million. More>>

Statistics: Drop In Dairy Prices Leads Fall In Exports

Total goods exports fell $240 million (5.5 percent) to $4.2 billion in April 2015 compared with April 2014, Statistics New Zealand said today. More>>

BusinessDesk: APN's NZME Sees Future In Paywalls, Growth In Digital Sales

APN News & Media has touted a single newsroom concept for its NZME unit in New Zealand, similar to what Germany's Die Welt uses, saying an 'integrated sales proposition' is helping it win market share, including ... More>>

Labour Party: Global Milk Prices Now Lowest In 6 Years

The latest fall in the global dairy price has brought it to the lowest level in six years and shows there must be meaningful action in tomorrow’s Budget to diversify the economy, says Labour’s Finance spokesperson Grant Robertson. “Dairy prices ... More>>


BusinessDesk: NZ Inflation Expectations Creep Higher In June Survey

May 19 (BusinessDesk) - New Zealand businesses lifted their expectations for inflation over the next two years, sapping any immediate pressure on the Reserve Bank to cut interest rates, and prompting the kiwi dollar to jump higher. More>>

BusinessDesk: Lower Fuel Costs Drive Down NZ Producer Input, Output Prices

May 19 - Producer input and output prices fell in the first quarter, mainly reflecting lower fuel costs and weakness in prices of meat and dairy products. More>>

Media: Fairfax Media NZ Announces Senior Editorial Team

Fairfax Media New Zealand has today confirmed its new editorial leadership team, as part of a transformation of its newsrooms aimed at enhancing local and national journalism across digital and print. More>>

Science: Flavonoids Reduce Cold And Cough Risk

Flavonoids reduce cold and cough risk Research from the University of Auckland shows eating flavonoids – found in green tea, apples, blueberries, cocoa, red wine and onions – can significantly reduce the risk of catching colds and coughs. The research, ... More>>

BusinessDesk: RBNZ House Alert Speech The Catalyst For Government Action

Prime Minister John Key all but conceded that pressure from the Reserve Bank of New Zealand for concerted action on rampant Auckland house prices was one of the main catalysts for the government's weekend announcements about tightly ... More>>

BusinessDesk: How To Fall Foul Of The New Housing Tax Rules: Tips From IRD

Just because you rented out your investment property doesn't absolve you from paying tax, says the Inland Revenue Department in a summary of commonly made mistakes by non-professional property investors when it comes to their tax liability.More>>

Legal: Superdiversity Law, Policy And Business Stocktake Announced

Mai Chen, Managing Partner at Chen Palmer New Zealand Public and Employment Law Specialists and Adjunct Professor of Law at the University of Auckland, today announced the establishment ... More>>

Get More From Scoop

 
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news