7.3: Lab 7 Assignment: Soil Arthropods - Biology

7.3: Lab 7 Assignment: Soil Arthropods - Biology

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Guide to Common Soil Arthropods Name: __________________________

PART I. Identification

Mites (Class Arachnida, Order Acari): Round Worms (Phylum Nematoda):

Segmented Worms Leeches (Phylum Annelida, Class Hirundinea):

(Phylum Annelida, Class Oligochaeta):

Snails, Slugs (Phylum Mollusca, Class Gastropoda): Isopod (Phylum Crustacea, Order Isopoda):

Centipedes (Phylum Uniramia, Class Chilopoda): Millipedes (Phylum Uniramia, Class Diplopoda):

Insects (Phylum Arthropoda, Class Insecta)

Hymenoptera: Formicidae Collembola

Ants Springtails

Coleoptera Coleoptera

Beetles (grubs) Beetles (adults)

Additional, Morpho-species (draw and describe each of the “artificial” designations used in your data reporting):

Data Collection

Collection Site NameTAXA/Morpho-speciesTALLYTOTALS

Part II. Soil Arthropods Study

  1. Report your results – major trends, morphological differences in guilds between samples, etc.



  1. Discuss your results – why did the arthropod assemblages vary as they did in your samples?

Part III. Identification

Create a Dichotomous Key for the organisms identified in your group samples: these are set up as couplets of two choices that are opposite. For example:

1A. Shape does not have discernible “sides” … …CIRCLE

1B. Shape has discernible sides … … 2

2A. Sides of shape are all of equal length… …3

2B. Sides of shape are not all of equal length… …RECTANGLE

3A. Shape has three sides … …TRIANGLE

3B. Shape has four sides … …SQUARE

Select SIX of the soil organisms you identified in this lab and create a dichotomous key that can be used to identify them.

Key approved by: ___________________________________________________________

Soil Your Underwear Challenge

This challenge presents seven activities intended to give you a basic understanding of soil ecology. Each activity is paired with a field guide that allows you to question what you see in your soil. The main emphasis within these activities is to demonstrate that good science is founded on quality observations.

This Challenge was available to members only, now you can do it too! Members do get to attend member-only special events like this! Do you want to be apart of these special events?

Burying a perfectly clean pair of cotton undies is absolutely ridiculous!

And that is exactly the point— to add a level of silliness to science by burying underwear.

Professional scientists conduct look-and-see bioassays to see what’s going on in their study system. This gives them a better understanding of how to question and hypothesize before they design more formal experiments. Our activities are rooted in look-and-see bioassays and we hope they can spark your next big idea or science experiment.

This website serves as a colorful resource to discover life in your soil. If you have questions about our lessons, we offer how-to videos online as well as supplemental materials to discover more ways to bring soil science into focus. We hope you can
connect with us online to learn more and share your journey with soils.

Our activities are rooted in look-and-see bioassays and we hope they can spark your next big idea or science experiment.

Watch the video: Soil Fauna: Extraction and Identification (May 2022).