How
to get a good grade on the Term Paper
Research phase:
- When doing research, use the primary
literature (do not base your paper entirely on internet information
or books -
see the assignment sheet). Note that there are a number of online databases
that you can use to find information on your species, accessible through
the UMD library system.
One of my favorites is Cambridge
Scientific Abstracts (check the "Ecology" box when searching, use the scientific rather than common name for your
species, and in general use the "all words" rather than
"exact phrase" option). Once you
have done a fair amount of research, you may consider calling/emailing
people at the Zoo/universities/Fish and Wildlife service with SPECIFIC
questions or reference requests. The FWS has Habitat Conservation Plans and probably PVA reports on some species in the US. You should have at
least 10 references that are non-web based, and at least 5 references from
scientific journals.
Analysis phase:
- Make sure you run all necessary simulations (see the assignment sheet).
- Use catastrophes carefully - they
should be things that happen intermittently and to a broad cross-section of
the population. They should not be effects to *individuals* or things that
happen *all* the time (male-male aggression, poaching, deforestation). This
Vortex parameter is well suited to things like forest fires, floods,
disease. Are there catastrophes that could indirectly affect your species by
wiping out the food/prey in a given year? Also, if you are unsure of the
probabilities or severity for your catastrophes, then do a run without any -
this will show you their relative importance.
- Consider these parameters carefully:
- How many populations - Generally you
want to consider one isolated population of a species for your term paper,
but if you know your population is experiencing significant migration from
another population you may want to discuss that, even if you do not
incorporate it in your model.
- What is the maximum number of
young per litter - Generally this value will be 1 or greater, but if your
species reproduces less frequently than once a year, then you will need to
talk to the professor or TA to figure out how to deal with this. You may
need to assume that X model years = 1 real year for your species. Be aware
that an assumption like this may change many other values like maximum age,
etc.
- Carrying capacity - are they at
or near K? If not then what has lowered their numbers below K? How might you
determine what their K is? If it appears that loss of habitat is more
important in determining their decline than mortality (as from hunting),
then consider that they might be at K already...
- Carrying capacity trend - is their
habitat/resource base increasing, decreasing, or staying the same?
- Carrying capacity Standard Deviation
- Does the resource base/prey fluctuate significantly from year to year or is it
relatively constant? Be careful about what value you pick if you decide to make
it vary. You might run at least one simulation where SD=0.
- Harvesting - this could be used to
incorporate the effects of poaching, but you might also be justified in using an
increased value for [adult] mortality depending upon the situation.
- Supplementation - may be used to
simulate stocking of game animals or reintroductions/translocations if this
applies to your situation.
- When you look at your results,
consider that this is a stochastic model (incorporates random events, so each
run has a different possible outcome). When you are only running it 100 times,
then random events may make one scenario go extinct a little sooner or later
than another. If the trend doesn't make too much sense, then try running with a
larger number of repetitions - maybe 500 or 1000. But consider the importance
and meaning of individual runs.
Writing phase:
- When writing the report, look at the
Instructions to Authors. Write the paper as if you are submitting it to the
journal Conservation Biology. If you don't use the correct format, you *will*
lose points.
- Do a spell check!!!! And read your
paper over once for grammatical errors and redundancy. Grammar and clarity are
10% of the paper. Use the active voice wherever possible. Avoid unnecessary
information. A long paper padded with useless information is infinitely
worse than a short paper that concisely addresses and summarizes the
relevant data. Avoid sentences like:
- "A vegetarian diet is typical of
herbivores who digest both the content and plant cells and the cell wall."
- "It is in the order Carnivora, so
it would be assumed that the animals are carnivores. The diets of these large
animals consist mostly from small to
medium animals."
- Make a table of Vortex input values
(all of them) and next to each value put a citation for the data or a reason for
why you choose this value. Do this early in the semester and the project will be
much easier.
- For citations/bibliography see a
copy of the journal Conservation Biology. For how to cite web pages see this: http://www.lib.umd.edu/UMCP/UES/citing.html
- In your paper discuss your results
IN DETAIL (summarizing the output numbers in a table or attaching an output file
as an Appendix is good, but it is not sufficient - you need to summarize and
*explain* the results!). You should explain the differences in each simulation
you ran in terms of probability of extinction, time to extinction,
heterozygosity, and population parameters (intrinsic rate of natural increase
(r), net replacement rate (R0), etc.). What do these mean?
- Use your results to decide on your
recommendations. Focus on the factors that the simulations indicated to be
important. Don't ignore your results even if they didn't come out how you
expected. You should not start writing your recommendations until you look over
your results.
- If your results indicate no threat
of extinction, or indicate that extinction is assured in 10 years no matter
what, then consider first whether your parameters are correct. Try changing
values that are "guesstimates" and see if they change the outcome. Is
this a real result, or is it an error in your model? Consider both
possibilities. Try to figure out which is the case. If your species falls into
either extreme (very likely to go extinct, or not likely at all), then think
about whether anything SHOULD be done (is it worth putting money/effort into
this species versus other conservation needs?), or whether anything CAN be done.
Is there one parameter in the model that could change this outlook? Could it be
changed in real life through management?
- Consider what it might take to
solve the social/economic problems *driving* the extinction. For example, for
tigers in Siberia, will increased enforcement solve the problem of poaching? Or
will there always be more poachers than rangers? Will the rangers become
poachers if not paid enough? Is there an alternative you can offer to the
poachers/local people?
- Consider the costs/benefits to your
recommendations. (E.g., Is there a down side to increased tourism? Is there
another way to accomplish the same thing for cheaper or with greater public
acceptance?)
- Think, ponder, reflect on your
results and the fate of your species... then write the Discussion section.
Common Mistakes People Have Made:
- Did not use appropriate values for Vortex parameters or failed to
adequately justify the values. Note that for most species, this will be the
hardest part of the term paper.
- Used scenarios for "catastrophes" that weren't really suited to
catastrophes.
- Did not look at socioeconomic factors.
- Didn't spall chack.
- Didn't follow format.
- Didn't put in table showing parameter values and citing source or
providing justification.