Rocking around the Christmas weed

Department of Conservation —  20/12/2017 — 3 Comments

The pine tree – it’s the quintessential Christmas icon, filling up our living rooms with its sweetly terpene scent and impressing visitors with beautifully-crafted decorations, tinsel, lights and baubles.

The Christmas tree is beloved, but it’s not all angels and festive cheer, there is a dark side to the magnificent pine.

Christmas tree. Photo: Pixabay

The beloved Christmas tree

Those afflicted with allergies know one of the problems with pines, Christmas Tree Syndrome, the runny noses, sneezing and itchy eyes caused by pine and mould spores.

Conservationists are also not impressed with the humble pine tree.

The pine problem

Pine trees grow remarkably well in New Zealand’s hospitable conditions, which is great for our forestry industry, but not so welcome for those trying to protect our native plants.

Wilding conifer.

Wilding conifer

Species like pinus contorta, larch and Douglas Fir were introduced to New Zealand a century ago for timber, erosion control and firewood. But they adapted so well that when their cones open and the wind catches their seeds, they can spread quickly, littering our landscapes with a scattering of green saplings.

These alien invaders are called wilding conifers. They have become a serious problem in many parts of the country and create a nasty rash over our pristine tussock and mountain landscapes.

These fast growing conifers quickly outcompete our native species, sucking up nutrients but providing none of the advantages of our native plants, such as food for bird life and insects.

Worst of all, pine needles can form an acidic carpet which stops the regeneration of our native plant species.

What can you do?

If you are disposing of your Christmas tree – don’t dump them in the wild, because if they’re coning, the seeds can still spread. Make sure they are disposed of at the rubbish tip.

DOC is responsible for wilding conifer infestations on public conservation land but we are by no means the only ones taking action.

Some trampers and hunters carry little folding saws to cut down small wilding pines. If you do this, it’s important to cut down the whole tree stump and not leave any branches or green needles behind.

Wilding pine control near Lake Clearwater, Ashburton.

Wilding pine control near Lake Clearwater, Ashburton

Extremely small seedlings can be pulled out by hand which is very effective as there is no risk of re-growth.

If you’re interested in getting more involved, you can join a wilding weeds group or find out how you can prevent the spread of wilding pines on land you manage.

Pulling out wilding conifer saplings.

Pulling out wilding conifer saplings

So, when you’re admiring your beautiful Christmas tree these holidays, spare a thought for their wilding relatives that are causing havoc for conservationists.

3 responses to Rocking around the Christmas weed

  1. 
    Thornton Campbell 20/12/2017 at 6:27 pm

    Could you provide some details on this? “Worst of all, pine needles can form an acidic carpet which stops the regeneration of our native plant species”, I’m quite interested! Thanks!

  2. 
    Martin Broadbent 20/12/2017 at 7:42 am

    Now it’s “weeds” to go along with “pests”!

    You’ve allowed so much natural bird habitat to disappear, massive areas with no trees. Seriously there are some areas where there will never be anything for birds. I’m not seeing your intervention by replacing it.

    • 

      Wilding conifers overwhelm our native landscapes and push out our native species. Species such as our native tussocks provide important habitat for many native animals, by removing wilding conifers we’re giving them a chance to recover.

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