What is a math formula that a forest ecologist would use?

Question

Like any regualr formula only relating to a forest ecologist...

i cannot find any...

i need the formula

what that variables represent

a funny story and some research but i can find anything useful

Answer 1

Hmmm . . . well . . . I'm in a population modeling class (that's a senior level class in college). This is the second one I've taken. In the first one, I remember one of the example problems being about trees.

I wasn't able to find the book just now, but I can tell you from memory that one way of modeling populations (of almost anything, trees included) is with Leslie matrices or modified matrices that have nonzero terms where the Leslie matrices have terms equal to zero. The Leslie matrix is a form of projection matrix . . . it is multiplied by a matrix representing the current state of the system to get the state at the next interval (in discrete models; the class I'm in is about continuous models so I can't say much about those). The example I was thinking of when I read your question was about a forest with two trees competing with each other, with different reproductive rates and different rates of competition. It was a discrete linear model, so it was somewhat simplistic. But the principles it is based on can be used to create much more accurate models. The system was something like:

A(t+1) = (1 + b)A(t) + (-c)B(t)
B(t+1) = (-d)A(t) + (1 + r)B(t)

That is a simple system of linear difference equations in which A and B are population functions, b and r are birth rates, and c and d are competition coefficients. Obviously this system has the shortfall of not having "natural" death in it. That is, no death can occur due to a cause not related to competition. There are much more complex models, but I don't remember any off the top of my head and just explaining THAT one to everyone in your class will probably baffle them.

Another type of model that can be used to model plants is called cellular automaton. You might already be familiar with one type of cellular automaton already: Conway's Game of Life. I don't have much time to explain, but it should be somewhat obvious how the model (with some variation) can be applied to plants. Here are some links:
http://en.wikipedia.org/wiki/Cellular_automaton
http://en.wikipedia.org/wiki/Conway%27s_Game_of_Life

Good luck with your report!

Answer 2

properly you will possibly probable prefer to first locate the dating between the two gadgets: 1soccer ball : 5 tennis balls. Now you prefer to locate the quantity of one tennis ball and multiply it with the aid of 5 to locate the quantity of the soccer ball, after which you prefer to divide that answer with the aid of 3.14 and then from there multiply the respond with the aid of 3/4, and finally decide what quantity expanded with the aid of itself thrice equals that. For the 2d in basic terms get the area for between the table tennis balls and divide 763.4 with the aid of that cost, and additionally you have your answer. i'm only in Algebra, and for what i comprehend suited now all i'm able to inform you is that those issues are quite undemanding.