Search found 156 matches

by Lee Frelich
Thu Feb 02, 2012 4:16 pm
Forum: General Science Discussions
Topic: Limits of Scientific Investigation
Replies: 3
Views: 1708

Re: Limits of Scientific Investigation

ENTS: I agree partly with Ed and partly with Neil. Clearly in ecology, we have not come up with any exciting new theories in a long time (I use theory in its scientific sense--a set of ideas that explains how something works--and not the slang usage that is so common--as an alternative to a fact). W...
by Lee Frelich
Thu Feb 02, 2012 4:01 pm
Forum: Old Growth and Primary Forests
Topic: Arboreally Speaking, the Good Old Growth Curve Is a Delusion
Replies: 15
Views: 10999

Re: Arboreally Speaking, the Good Old Growth Curve Is a Delu

Kouta: I agree with your assessment (in many cases) of boreal retrogression in Sweden and North America. Perhaps secondary retrogression is a valid concept. However, some of those sites also have almost no soil on top of granite, so in some cases its not just that the nutrients are unavailable in th...
by Lee Frelich
Thu Feb 02, 2012 3:51 pm
Forum: MA - Mohawk Trail State Forest
Topic: The pretty, the ugly, and the pretty ugly, MTSF, MA
Replies: 2
Views: 1604

Re: The pretty, the ugly, and the pretty ugly, MTSF, MA

Bob:

Thats as close to a squid, or to one of those creatures from an Aliens movie, as a tree can probably ever get. However, I do feel sorry for the tree.

Lee
by Lee Frelich
Tue Jan 17, 2012 3:56 pm
Forum: Weather and Climate
Topic: Warm winter in Minnesota
Replies: 7
Views: 3176

Re: Warm winter in Minnesota

Bob: Well, your winter must be colder than ours, we have not had a zero degree day yet. Joe: The upside of global warming is not having to drive as often in the blizzards that used to be more frequent. Ecologically, all changes lead to negative effects on one group of species and positive effects on...
by Lee Frelich
Tue Jan 17, 2012 8:53 am
Forum: Weather and Climate
Topic: Warm winter in Minnesota
Replies: 7
Views: 3176

Re: Warm winter in Minnesota

Bob: Yes, but there are fewer of them this year than last year. Have you seen James Hansen's latest analysis of temperatures in the U.S. and other parts of the world? It shows that the last 30 years, as compared to 1951=1980, had a shift to a warmer mean, but that also the variance of the distributi...
by Lee Frelich
Sun Jan 15, 2012 3:13 pm
Forum: Weather and Climate
Topic: Warm winter in Minnesota
Replies: 7
Views: 3176

Warm winter in Minnesota

ENTS: Although there have been some cold winters in New England in recent years (especially last year with its negative Arctic Oscillation), winters in Minnesota have been getting steadily warmer. We have not had a day yet with a low of zero F or lower this 'winter', and if this does not happen by W...
by Lee Frelich
Tue Jan 10, 2012 2:49 pm
Forum: Old Growth and Primary Forests
Topic: Arboreally Speaking, the Good Old Growth Curve Is a Delusion
Replies: 15
Views: 10999

Re: Arboreally Speaking, the Good Old Growth Curve Is a Delu

Kouta: Old tropical rainforests can have mechanisms and plant species adaptations that allow them to retain and very tightly recycle nutrients, and losses to the ecosystem may be so small that atmospheric inputs can replace them, even for P (see page 512 of the article). This would allow retrogresse...
by Lee Frelich
Mon Jan 09, 2012 12:17 pm
Forum: Off-topic - Post About Anything Here
Topic: Leonardo’s Formula Explains Why Trees Don’t Splinter
Replies: 10
Views: 8094

Re: Leonardo’s Formula Explains Why Trees Don’t Splinter

ENTS: I read the paper: Eloy, C. 2011. Leonardo's Rule, self similarity, and wind induced stress in trees. Physical Review Letters. 107, 258101. Also analyzed, was a tree with random branch angles, which looks a lot more like a real tree: Picture1.png With this stochastic tree, Leonardo's exponent r...
by Lee Frelich
Mon Jan 09, 2012 9:37 am
Forum: Old Growth and Primary Forests
Topic: Arboreally Speaking, the Good Old Growth Curve Is a Delusion
Replies: 15
Views: 10999

Re: Arboreally Speaking, the Good Old Growth Curve Is a Delu

Kouta and Neil: I think the forests in Finland are quite different--they don't have balsam fir which is susceptible to the native (and poorly named, since it mainly infests fir and not spruce) insect spruce budworm. So, the time for retrogression is uniquely short in boreal forests of central North ...
by Lee Frelich
Sun Jan 08, 2012 10:47 am
Forum: Autopoietic Forest
Topic: What qualifies as an Autopoietic Forest
Replies: 11
Views: 7874

Re: What qualifies as an Autopoietic Forest

Gary: Yes, I think they can meet the criteria listed in your slide after being logged. If you look at the second-growth forests inside the Boundary Waters Canoe Area Wilderness, Voyageurs National Park, and Isle Royale National Park, and many other places in the Midwest, that were logged once, or lo...

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