3144L-02 - Ecology Lab
Ecology Lab – Bio 3114-01
R. O. Bierregaard
2405 (h) or by
Lab schedule available and supporting links on Dr. Barden's
Paired and unpaired
t-tests - Wilcoxon
unpaired test -
Wilcoxon paired test - 2X2
drafts (10% weighted by weeks). Write-up final (50% weighted by weeks). Quizzes
1. Papers must be submitted via email, preferably in MSWord.
2. The name of the file must begin with your initials and then a word to
identify which lab you're reporting on, e.g. and whether it is draft or final
version: rb_pond_draft.doc or rb_pond_final.doc.
3. The report must begin with your name, date report due (not submitted!), and
the full title of the report.
4. Reports are due the day of lab (before midnight) one week after the day we
finish the experiment or study.
5. If you didn't follow instructions 1-3, the paper will not be considered
6. Your papers should have 4 (or 5, if there is a Literature Cited) labeled
sections: Introduction, Methods, Results, and Discussion. They will count 30,
20, 20, 30 points, respectively.
7. Details of paper organization:
The Introduction presents the "big
picture" background for the lab. What is the biological question or process
we're interested in? Competition? Habitat and species distribution? Water
quality and aquatic species? What relevant research has been done on the topic?
This will come mostly from my introductory remarks and discussion, but some
outside research may be needed.
Clearly identify the purpose of the lab with a sentence
that begins, "The purpose of this lab was to....".
Mention where we did the study (in general terms). Save
details for the Methods section.
Methods: This section must be written in the
past tense (you are describing what you DID) and be detailed enough that one of
your fellow students could recreate your work exactly based only on what you
write. Include a map of our study
Area (from GoogleEarth). Include all statistical tests that were performed.
The Results section will just present the
outcome of the field work. Keep the discussion out of this section. Make sure
you present the results of the statistical tests (see
below for details). You need to include at least a couple of summary
sentences. If you only submit a table or graph, you will get a 15 out of 20
points, even if all the results are in the table.
The Discussion is just that. It relates your
results back to the questions you presented in the Introduction. Always look for
a biological explanation of the results before copping out with "our sample
size was not large enough," or, "due to our inability to identify the
species more accurately...."
8. 2 points will be deducted from the paper for each sentence that says nothing
more than "The data are in Table 1."
9. Points will also be deducted for bad writing (see examples below), especially
10. Use the spell-checker.
11. Over the course of the semester you have 5 "late days" of grace
period. You can use them all on one report (i.e. submit a report 5 days late) or
spread them out over the semester (i.e. submit 1 report 2 days late and 3
reports a day late each).
12. If citations are used, use the "name-year" system of referencing
citations, rather than numbered footnotes. When using the name-year
system, use the abbreviated citation in your text and the full citation in your
Literature Cited section. Here is an example of the three ways to cite
references in the text of your paper.
a. The discovery in normal cells of genes capable of
causing tumors can be considered a milestone in cancer research (Stehelin and
b. Recent work (Sarkar and Sarkar 1995) has confirmed
the importance of this finding.
As Bishop and Varmus (1985) point out, numerous results now suggest that changes
in these genes transform normal cells into cancerous ones.
We will have a very short quiz most weeks. They start
at 2 pm sharp and last about 10 minutes. The format will be very short
answers covering material in the previous lab. It may be on techniques,
statistics, or identification of some critters we encountered in the field.
If we plot data in
graphs, be able to recreate the graph with a different set of data. The lowest
quiz score for the semester will be dropped.
you are going to be absent for an unavoidable reasons, call me on or before the
day of the lab to arrange makeup.
avoid a late fee, you must make
up missed lab quizzes before the next lab.
This is your responsibility, not mine!
integrity is my assumption.
You are responsible for understanding the Policy
on Academic Integrity at UNCC, particularly the section on plagiarism
and its most common form, unacknowledged
Copying on exams will result in an "F" for a semester grade in the
course. As a condition of
taking this course, all writing assignments may be subject to review by Turnitin.com
for the detection of plagiarism. All submitted papers will be included
as source documents in the Turnitin.com reference database solely for
the purpose of detecting plagiarism of such papers.
writing examples: (Mega points will be deducted from your papers if I am
tempted to include something you submitted in this collection.)
Knowing that soil is one of
earth’s natural resources that is often made by man to serve as an energy
source for plants, one would suspect that soil is a needed product for plants to
grow. However, soil have three major components.
There were no differences in plant community within the varies of types of soil.
After completing this observation the class has confirm that from the late
1800’s to 1950 both female and male lived a very average life spand.
The individual tree assessed in this experiment using the two sample t-test had
a more significant difference in the end results, but all of the trees measured
in the class and using the paired t-test is a stronger test and has more weight
in falsifying Nobel’s statement.
There are three gradients of soil type: xeric, the dry region mainly desserts,
mesic, the moist region, and hydric, the really moist region, mainly the swamps
but in this study, the xeric, mesic and a middle transition region will be
The basal area is a parameter that forestry typeuse by dividing the diameter by
half: (pi)(r squared).
This soil may be loamy in which great gardens of made
out of because of its perfect balance of sand, silt and clay and its healthy
percentage of organic material.
How to write P-value statements for
your statistical tests
Frequently this semester, you will need to report means and P values
for statistical tests. Here is an example how I would like you to write these
"There was no difference between the height of freshman males and sophomore
males at UNCC (181.2 cm vs. 182.3 cm, respectively; unpaired t-test, df = 18, P
= 0.82; Table X)"
"Men at UNCC were significantly taller their sophomore year than their
freshman year (182.3 vs. 181.2 cm, respectively; paired t-test, df = 9, P =
0.003; Table X)"
In other words, put the biological information into words in the sentence. Put
the statistical information in parentheses using a series of commas. Refer to
your table of data as the last entry in the parentheses.