lab 2. overview
DESCRIPTION
Lab 2. Overview. Instructor collects lab. 1 write ups and checks pre-labs . in lab notebook Review of Lab Expectations (Exercises, Pre-Lab, and Attire) Overview of Populations, Plant Structure, and Quadrat Sampling. In-class plant structure examination Gather plant density data in field - PowerPoint PPT PresentationTRANSCRIPT
Lab 2. Overview Instructor collects lab. 1 write ups and
checks pre-labs. in lab notebook Review of Lab Expectations (Exercises,
Pre-Lab, and Attire) Overview of Populations, Plant Structure,
and Quadrat Sampling. In-class plant structure examination Gather plant density data in field Return to lab room. Plant Tagetes patula (French marigolds) Exercise due in Lab 3 discuss. & questions
Population EcologyPopulation = group of individuals of
the same species in a single area (Population) Density = # of individuals
(of the same species) per unit area
Individual, Population, Species Individual (e.g., you, a tree)
Population = individuals of the same species in a single area (e.g., all people in Denver)
Species = the largest cluster of individuals that is genetically isolated from other groups of individuals and maintains its identity (e.g., all people in the world) ≈ “kind”
Use ThisWord
Carefully
Individual & PopulationPopulation
Individual
Species = all the in the world
Plant Structure
Simple vs. Compound Leaves
trifoliatebipinnate
Kinds of Plants (Ecological)Woody Plants =
Produce woody stems (trees & shrubs)
Herbaceous Plants = Do not produce woody stems
-Grasses-Forbs = not grasses
-Rosette growth form-Vining growth form-Erect growth form
RosetteTaraxacumofficinale
ErectMedicagosativa
viningConvolvulusarvensis
Slope
N S
E
W
west-facing slope
east-facing slope
south-facing slope
north-facing slope
• What conditions of sun exposure, heat, and moisture would each slope experience?
Quadrat - Density Sampling
m2
m2
m2
samples =samples =
42
61
80
m2
44
mean = 5.50mean = 1.75
Reminders Before the Field READ the instructions () in the manual Develop hypotheses (two; 1 per species) now. Count the number of individuals of each of
the two species SEPARATELY in each quadrat.
Decide what it means to be “in” a quadrat. Base of plant?
Sample randomly in each area. “0” is still a value. Obtain your unpaired t-test P-value using
the online site linked to the course website.