Lichen!
A harmless and sometimes considered unslightly combination of algae or cyanobacteria and a fungus, coming together in a mutually beneficial relationship.
With a range of colours and forms, the presence of lichen on a tree is a sign of clean healthy air and that it has no negative impact on the growth of the tree.
An epiphyte (a plant or plant-like organism that grows on the surface of another plant), lichens are unlikely to kill a tree, or cause it to fail. Lichens are not parasitic and do not draw nutrients from the tree.
Lichens need sunlight for photosynthesis, so they don't thrive in heavy shade. Consequently, they are typically found on deciduous trees or trees that are already dying, as these conditions provide less leaf cover in the canopy, allowing more light to reach the lichens.
While it is normal and natural for lichen to be present on a tree, an abundance of lichen might suggest that the tree is experiencing some form of stress.
If you are concerned about the presence of lichen
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From small things great things grow - let's green our community together and make a difference for our environment!
Poll: Should we be giving the green light to new mining projects? 💰🌲
The Environmental Protection Authority announced this week that a proposed mine in Central Otago (near Cromwell) is about to enter its fast-track assessment process. A final decision could come within six months, and if it’s approved, construction might start as early as mid-2026.
We want to know: Should mining projects like this move ahead?
Keen to dig deeper? Mike White has the scoop.
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53.3% Yes
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46.7% No
Poll: Pedestrian access is being extended to the Ōtakaro Avon River - good idea?
Pedestrian access from one of Christchurch’s favourite streets is being extended all the way to the Ōtakaro Avon River. This new 12m-wide pathway will give you a direct, easy route from the street to the river promenade ... perfect for a stroll, a coffee run, or just soaking up the riverside vibes.
We want to know: In your view, what makes a city people-friendly?
What else should our urban areas be doing to support better community connections?
Curious about the full plans? You can check them out here.
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92.3% Yes
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7.7% No
A riddle to start the festive season 🌲🎁🌟
I'm a fruit. If you take away my first letter, I'm a crime. If you take away my first two letters, I'm an animal. If you take away my first and last letter, I'm a form of music. What am I?
Do you think you know the answer? Simply 'Like' this post if you know the answer and the big reveal will be posted in the comments at 2pm on the day!
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Head here and hover on the Following button on the top right of the page (and it will show Unfollow) and then click it. If it is giving you the option to Follow, then you've successfully unfollowed the Riddles page.
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