We use cookies to provide you with a great user experience. By using our site, you accept our use of cookies. You can review our cookie and privacy policy here.
  • Service & Support

    Contact Us

    Our Customer Service team is available from 8am to 6:00pm, ET, Monday through Friday. Live chat is available from 8am to 5:30pm ET, Monday-Friday.

    Email Customer Service

    International Sales & Service

    We serve educators in more than 170 countries worldwide. Create a quote request on our website or contact our International Sales Team.

    International Ordering
  • Shopping

    Login or register now to maximize your savings and access profile information, order history, tracking, shopping lists, and more.

  • Quick
  • My Cart

    My Cart

    Your Shopping Cart is currently empty. Use Quick Order or Search to quickly add items to your order!

Carolina Investigations® for AP® Biology: Species Interaction 8-Station Kit



  • Aligned with Big Idea 4 and Essential Knowledge 4.A.5, 4.A.6, and 4.B.4
  • Emphasizes Science Practices 3, 5, 6, and 7

Explore dissolved oxygen consumption in the presence of producers and consumers in an aquatic food chain.

  • Study community interactions in an aquatic food chain
  • Measure dissolved oxygen concentrations using the Winkler method protocol
  • Describe how food webs and other factors, such as predation and abiotic changes, influence species distribution and abundance in communities

Help your students make a big picture connection across communities and populations by characterizing food webs and other factors, such as predation and abiotic factors. Students master the Winkler titration method for measuring dissolved oxygen concentrations. Using this tool, they measure dissolved oxygen fluctuations to assess the relationships between species in an aquatic food chain (Daphnia, Chlorella, and Hydra). After understanding the dynamics of the aquatic food chain, students introduce new variables to design their own experiment using the producers and consumers. The 8-Station Kit includes enough materials for a class of 32 students working in groups of 4.

AP® is a trademark registered and/or owned by the College Board, which was not involved in the production of, and does not endorse, these products.

   This item is sold and shipped to schools and businesses only. Not available to individuals or residential addresses. For substitution suggestions, please call us at 800.334.5551 (8am to 8pm, ET, Monday-Friday).


Shipping Information or Purchase Restrictions
  • This item is sold and shipped to schools and businesses only. Not available to individuals or residential addresses. Visit our Login & Registration page to learn how to create a Login and link it to an approved school or business account. Excepted Quantity - This product is/contains a DOT regulated hazardous material in an excepted quantity. This does not incur a hazardous materials fee. Orders shipping to HI and AK are subject to review and may incur additional shipping charges.
What’s Included:
  • Chlorella Culture (voucher item)
  • 4 Daphnia Culture (voucher item)
  • 2 Hydra Culture (voucher item)
  • 3 Alga-Gro® Media
  • 32 BOD Bottles with Caps
  • 16 Titration Syringes
  • 1 Plastic Tank with Lid, 1.5 gal
  • 8 7 M Manganous Sulfate
  • 8 Potassium Iodide Azide
  • 4 Sodium Thiosulfate, 50 mL
  • 8 Spoons, 1 g
  • 8 Starch Indicator Solution, 7 mL
  • 8 Sulfamic Acid, 20 g
  • 16 Sampling Vials, 20 mL
  • 30 Plastic Cups, 24 oz
  • 20 Pipets
  • Teacher's Manual and Reproducible Student Guide
Needed But Not Included:
  •  Springwater
  •  Deionized Water
  •  Graduated Cylinders, 100 and 500 mL
  •  Parafilm® or Plastic Wrap
  •  Small Cup or Beaker
  •  Paper Towels
  •  Permanent Markers
  •  Sharpened Pencils
  •  Light Bank
  •  Gloves
  •  Goggles
Return Policy:

If for any reason you are not satisfied with this item, it is eligible for a return, exchange, refund, or credit up to 180 days from date of purchase. Restrictions may apply. Returns & Exchanges Policy.


Questions & Answers