Flexible ordering options and accompanying workbooks make EcoBeaker labs simple to adopt, and the well-crafted case studies and user interface make the learning experience enjoyable. Students address these questions by manipulating procedures and parameters in the model. Request Evaluation Software How to order. Competition, Nutrient Ratios, nrg file viewer Limiting Nutrients. This laboratory recreates the famous experiments of R.
This is a procedure which is invoked for each creature of that species on the Grid, and which defines the actions of the species - movement, reproduction, death, etc. The first part of the lab takes students step-by-step through manipulations and is great for introductory-level courses and as a general introduction to EcoBeaker models. Niche, Competitive Exclusion, Scientific Modling.
Using a model of succession from grasses to trees, students start out by observing a successional sequence without disturbance. Recreates the classic experiment of adding fish to a fish-free lake and observing the effects across different trophic levels. In an open-ended advanced section of the lab, students can alter the susceptibility of different species to burning and their succession rate to see how these factors influence diversity. Population growth, Carrying Capacity, Predator-prey Dynamics. This is a procedure which is called at the beginning of each Time Step.
The Species Grid is a picture of the modelingworld, showing the positions of all the different creatures in the model. In the more advanced section of the lab, students can add a predatory snail, creating a new distribution.
This is a set of probabilities which determines whether a given creature will remain the same species or will change to a new species. Each square can contain a creature, and the creatures in a given model are split up into different types or species. It substituted well for a live lab without the students necessarily missing not going on into the field. Next they introduce wolves, and study the resulting predator-prey cycles. This is a recreation of the classic experiments of Connell on why the barnacles Chthamalus and Balanus have distinct distributions in the rocky intertidal zone of Scotland.
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Finally, they do the removal experiments and compare their results with their predictions. Species can be added to a model, or an existing species can be modified or deleted using the Species Setup window, shown below.
The students seemed to appreciate the realism of the simulation. They must first figure out which nutrient is limiting for each algal species, and what happens when the concentration of that limiting nutrient is changed. Students first observe the distributions, then try to tease apart the causes through a series of removal and transplant experiments. They absolutely loved the exercise, and we had trouble getting them to stop!
The Isle Royale simulation incorporates simplified vegetation succession to mimic the more complex succession of plant species that occurs in the real world. This laboratory provides students with tools to explore nutrient enrichment, eutrophication, and bioaccumulation of toxins. We all agreed that the graphics really work. They then explore how using models e.
The statistics can be displayed in line graphs, bar graphs, histograms, and y-y graphs or in time-tables and stat tables. This lab is used widely in non-majors and introductory biology classes as well as intro environmental science classes. Students investigate this question by sampling the energy stores of moose with and without wolves present.
This module was developed as a pre-lab for Isle Royale or a supplement for courses that cover intro-level population biology. Can four identical species of rabbits coexist in a yard with a limited amount of the only source of food lettuce?
What will happen if your city starts dumping lots of extra sewage into your local lake? Students first learn about edge effects and how landscape features such as corridors and stepping stones might affect population survival.
The lab simulates the arrival of the group of moose that swam to the island and rapidly reproduced to form a large population. It also provides a nice foundation for discussions of the important roles that different species can play in a community.
Do predators increase or decrease the health of their prey populations? How could that rabbit's niche be modified to allow coexistence? Grass starts out as the most abundant plant species, but is soon replaced with maple and balsam fir trees. Some of them may still be teaching that exercise, because your company knowingly gave me the disks for each of them to download the software. Finally, they try changing the plant growth rate to see how primary productivity influences population dynamics.
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In EcoBeaker a species refers to a collection of rules governing the behavior of creatures within that species. The rules associated with these species make up the basis of EcoBeaker models.
With these, they must generate and test hypotheses to explain the trophic cascades and competitive dynamics they observe in the lake. This popular laboratory explores basic population biology concepts including exponential and logistic growth and carrying capacity.
Then based on individual growth trajectories, students predict what will happen when different combinations species are grown together. In this lab, students grow three different algal species in isolation in media containing nitrogen, phosphorous, and silica. We all love how you worked global climate change into the new version and we also love the t-test at the end.
Again, I really appreciate how easy this was, and also how human. Students start out by characterizing the growth of a colonizing population of moose in the absence of predators.
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