Some information on ecological modeling, touched off by a look at
AUTHOR       Gotelli, Nicholas J., 1959-
 TITLE        A primer of ecology / Nicholas J. Gotelli.
 PUBLISHER    Sunderland, Mass. : Sinauer Associates, c1995.
 SUBJECT      Population biology -- Mathematical models.
              Ecology -- Mathematical models.
 1 > Science Library        QH352 .G67 1995
which presents a whole bunch of models as equations.

So I did a search for "lotka-volterra" and found some links worth revisiting:

L-V Two Species Model (St. Olaf)

and another page from St. Olaf

another presentation with Mathematica code, from a Mathematical Modeling course, U. South Alabama

L-V Equations through Computer Visualization from U. Minn Geometry Center

Mathematics and Biology: the interface table of contents

UNSW computer lab, with exercise

Predator-Prey Models for Maple

Hares and Lynx Applet, and the Java code behind it

another page and Population Dynamics Models from U. Leiden

Integrating the Electronic Desktop into the Natural Sciences Curriculum Development Project at California State University, Los Angeles

Analysis of an Ecosystem from RPI

Simulation Server

Volterra-Lotka Fractals

L-V Dynamics from UNSW

one from Virginia Tech


21 Mar
Another book, encountered quite by "chance":
 AUTHOR       Cartwright, Timothy J. (Timothy John), 1943-
 TITLE        Modeling the world in a spreadsheet : environmental 
                simulation on a microcomputer / Timothy J. Cartwright.
 PUBLISHER    Baltimore : Johns Hopkins University Press, c1993.
 SUBJECT      Ecology -- Computer simulation.
              Computer simulation.
 1 > Science Library        QH541.15.S5 C37 1993
This one has chapters on minimum viable population, sustainable yield, Conway's Game of Life --to name only those with obvious biological relevance.

More from the shelves:

 AUTHOR       Gotelli, Nicholas J., 1959-
 TITLE        Null models in ecology / Nicholas J. Gotelli, Gary R. Graves.
 PUBLISHER    Washington, D.C. : Smithsonian Institution Press, c1996.
 SUBJECT      Null models (Ecology)
              Biotic communities -- Statistical methods.
              Monte Carlo method.
 1 > Science Library        QH541.15.N84 G67 1996

 AUTHOR       Schneider, David C.
 TITLE        Quantitative ecology : spatial and temporal scaling / David C.
                Schneider.
 PUBLISHER    San Diego : Academic Press, c1994.
 SUBJECT      Ecology -- Mathematics.
 1 > Science Library        QH541.15.M34 S36 1994

 AUTHOR       Rosenzweig, Michael L.
 TITLE        Species diversity in space and time / Michael L. Rosenzweig.
 PUBLISHER    Cambridge ; New York : Cambridge University Press, 1995.
 1 > Science Library        QH541.15.S64 R67 1995
Let me see if I can clarify what I think is happening: mathematical models of ecological processes have been around for a long time, but they're puzzling to many students of ecology, in part because they don't think mathematically. This is a hurdle: how to help students develop a practical quantitative sense? The tools of a generation ago were graph paper and ink; access to scientific calculators and then computers began to change to cahnge that in the 1980s; spreadsheets were a major step in making data manipulable and displayable; and now we're on the brink of online interactive simulation, thanks to Java.

But how to make this new possibility for interaction accessible to professors and students? The links above indicate that quite a few people have worked on this general problem (and been generous in sharing their tools), but the steps from desire to present to actualization are still a bit unclear. I do have a feeling that books about data handling and display written more than 4-5 years ago are pretty much out of date, but I don't feel very secure about my own ability to bring them up to date with the Java tools available to me. And yet I think that it SHOULD be doable, but I'm not really sure where I have to start in order to make it happen.

One possibility is to plunge directly in, using the code for the Hare-Lynx applet to build a Visual Café applet myself --figuring out how to substitute, how to plug in code fragments from the existing applet into the frame that Visual Café provides.