For some time now, I've believed it would be good idea to chop down many/most paper bark trees in Tai Po Kau Forest reserve. [These trees have been introduced to Hong Kong from Australia; were planted here, especially in wetter forest areas.]
Walking thro paper bark groves, they seem pretty bad for birds - and, by the looks of things, biodiversity overall. Not much else growing there; in an otherwise diverse forest area, seems a bit like monoculture - akin to gigantic wheat field!
These trees are often big; but felling them might help some of existing other trees grow, as well as more saplings etc, leading to enhanced biodiversity here I reckon. (Yes, something of a guess on my part - I'd be intarested in opinions here)
Prompted to post this morning as only just come across this:
December 2001, Porcupine! 24: 19-20
Is Paper Bark Tree becoming invasive in Hong Kong?
By Billy C.H. Hau
[not quite same issue - the paper barks in TPK were planted, I believe]
Even if naturalists in HK were to support idea, perhaps removing a few trees as a test, I imagine more than a few desk bound bureaucrats might be startled by the notion.
I sent a brief email on this issue to Billy Hau, and he emailed back inc link to info on global invasive species database, which includes:
In the Florida Everglades and surrounding areas, where it was widely planted for landscaping and for "swamp drying", the trees grow into immense forests, virtually eliminating all other vegetation.
"Likely to cause significant ecological or economic harm in Hawai‘i and on other Pacific Islands as determined by a high WRA score, which is based on published sources describing species biology and behaviour in Hawai‘i and/or other parts of the world."