ESSCOSMOS/2009:FieldSampling: Difference between revisions
From OpenWetWare
Jump to navigationJump to search
No edit summary |
No edit summary |
||
(5 intermediate revisions by the same user not shown) | |||
Line 1: | Line 1: | ||
{{Template:ESSCOSMOS}} | {{Template:ESSCOSMOS}} | ||
==Overview== | ==Overview== | ||
In this activity, we will study the organisms and environment along a gradient from the edge of a marsh to the top of the hill. | In this activity, we will study the organisms and environment along a gradient from the edge of a marsh to the top of the hill. | ||
Line 17: | Line 20: | ||
*GPS device | *GPS device | ||
*TDR probe for measuring soil moisture | *TDR probe for measuring soil moisture | ||
*Meter stick | *Meter stick | ||
* | *LICOR LI-800 gashound, with chamber for measuring soil respiration, 12V battery, and pump | ||
* | *Clippers for harvesting aboveground plant biomass | ||
*Trowel for harvesting roots | |||
*Water bath for rinsing roots | |||
*Portable scale for measuring plant biomass | |||
==Methods== | ==Methods== | ||
Class will | Class will survey a 100m transect at 20m intervals. Five groups of four will take turns conducting the following measurements: | ||
#Soil CO<sub>2</sub> efflux | |||
#Aboveground plant biomass | |||
#Root biomass | |||
#Soil Moisture and insect biomass | |||
#Plant diversity | |||
===Soils=== | ===Soils=== | ||
*Measure soil moisture with TDR probe | *Measure soil moisture with TDR probe | ||
*Measure soil temperature using thermometer | *Measure soil temperature using thermometer | ||
===Insects=== | ===Insects=== | ||
Line 49: | Line 51: | ||
====Biomass==== | ====Biomass==== | ||
# Clip plants along a 150 cm by 10 cm strip at ground level. | # Clip plants along a 150 cm by 10 cm strip at ground level. | ||
# weigh plants and record mass | # weigh plants and record mass | ||
Line 62: | Line 63: | ||
===Analysis=== | ===Analysis=== | ||
#Look at your graph and describe | #Look at your graph and describe the patterns that you see | ||
#Are plant and insect biomass correlated along the gradient? | #Are plant and insect biomass correlated along the gradient? | ||
#How are soil temperature and soil moisture related to plant and insect biomass? | #How are soil temperature and soil moisture related to plant and insect biomass? |
Latest revision as of 19:41, 4 September 2010
Overview
In this activity, we will study the organisms and environment along a gradient from the edge of a marsh to the top of the hill.
Objectives
- Evaluate small scale gradients in biological and environmental conditions along a transect.
- Create graphical summaries of the findings
- Enter data into class database [link to google doc]
Background
The UCI Arboretum map of UCI Arboretum
Materials
- GPS device
- TDR probe for measuring soil moisture
- Meter stick
- LICOR LI-800 gashound, with chamber for measuring soil respiration, 12V battery, and pump
- Clippers for harvesting aboveground plant biomass
- Trowel for harvesting roots
- Water bath for rinsing roots
- Portable scale for measuring plant biomass
Methods
Class will survey a 100m transect at 20m intervals. Five groups of four will take turns conducting the following measurements:
- Soil CO2 efflux
- Aboveground plant biomass
- Root biomass
- Soil Moisture and insect biomass
- Plant diversity
Soils
- Measure soil moisture with TDR probe
- Measure soil temperature using thermometer
Insects
Insect Biomass
- take a soil core and place it in a bin
- mix the core well
- pairs of students should place a portion of the soil and count the number insects in each group
- after counting an insect, place it in a pre-weighed tube
- weigh tubes with insects from each group and record
- subtract original tube weight from weight of tube plus insects, this is the insect biomass
Plants
Biomass
- Clip plants along a 150 cm by 10 cm strip at ground level.
- weigh plants and record mass
Results
- Create a spreadsheet based on this template:
- Fill in data for each sample site
- Calculate biomass of plants and insects in units of g or mg per m2
Graphical summary
Graph plant and insect biomass, soil temperature, and soil moisture on a chart. Here is an example; example transect results
Analysis
- Look at your graph and describe the patterns that you see
- Are plant and insect biomass correlated along the gradient?
- How are soil temperature and soil moisture related to plant and insect biomass?
- What other patterns did you see?
- Why do you think that these patterns exist?
Homework
Write a one paragraph summary of your analysis.