Posted: Sat Apr 01, 2017 5:53 am
by Joe
Don wrote:Joe-
Good question...could it be that the very soil source that sustained "the 19 species" was removed by the glaciation?

Well, probably--- but it's not as if there isn't good soil in places where the glacier reached to. Maybe those species are just slow at rebounding- I dunno. If they are planted north of their current range and do well, I'd presume they could have progressed that far on their own so it is a mystery. But, if they're planted- then will they "escape"? Maybe it's all just a coincidence?

Black locust, I believe, is not "native" to Massachusetts but once planted spreads easily and it's considered invasive. I've always presumed that it must have been native before the glaciation along with many other species. I can't imagine why it didn't spread on its own before being planted.

It's certainly a good question as it will be relevant when global warming "heats up", no pun intended.

I am particularly interested in this because I had a debate with my state's Natural Heritage and Endangered Species Program which tries to protect species near the edge of their range- including trees- which has caused them to tell me that some species of trees near the edge of their range are VERBOTEN to cut. I wasn't happy about that- that an agency can restrict my silvicultural work with totalitarian power- causing one of many "wars" with state agencies. I couldn't even thin one species where there were dozens of specimens!