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Ollie Puddlemaker
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Joseph Lofthouse wrote:When I look at the forests around here, leaf litter covers the ground. Glaciers didn't cover my farm during the last ice age, therefore, earthworms have lived here continuously for millions of years. Seems to me like the introduced earthworms perform the same ecosystem services as the native worms.
The ice-sheets didn't cover the area from Philadelphia to Washington DC, therefore immense earthworm biodiversity exists in those areas. I watch robins carrying earthworms hundreds of feet in a few seconds, and inadvertently drop them. I watch deer step in damp soil, and drag that soil for thousands of feet in a jiffy, no doubt carrying earthworm eggs with them. So I think that northward migration of worms happened quickly after the ice receded.
I consider biology as fuzzy and indistinct. Earthworm taxonomy seems much more ill-defined than that. A special case of extreme chaos associated with identifying which species or even genus we observe. Therefore, I don't worry about earthworms.
This is all just my opinion based on a flawed memory
S Bengi wrote:Maybe the forest floor needs more light. Maybe they are to blame. Have you tried transplanting some trees yourself. Maybe some critter is eating/moving all the seeds.
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner
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Jay Angler wrote:There are areas in Northern Canada where earthworms were introduced by fishermen. Thus humans effectively "sped up" succession significantly faster for this one creature, beyond where plants and particularly trees, were able to adapt.
I've been told that many of the earthworms in Canada were brought by humans from Europe.
I've also read that there's a newly imported Asian worm (jumping worm maybe?) that is a problem in areas of the USA.
So it seems as always when Nature and Humans interact, things are "complicated". I just hope Nature is resilient enough to rise to the challenges.
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner
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