Today’s guest blog post is provided by Joshua Harms, part of the Iowa AmeriCorps 4-H Outreach program, serving with Water Rocks! in 2018-19.
Biodiversity Bonanza is another one of our awesome classroom presentations with Water Rocks!. As we start all of our presentations, we introduce ourselves and then we ask the students a (pre-assessment) multiple choice trivia question: “What is biodiversity?” After everyone has answered the question, we then explore the term biodiversity, asking the students to break the word into two parts, bio- and diversity. When the students define what bio- and diversity are, we then put the full word back together, explaining that biodiversity is all the different living things in a certain area.
We then transition to another important science term, ecosystem, which is a community of living organisms and their environment. At this point, it’s time for another game, our ecosystem guessing game, where students identify ecosystems from around the world.
After the game, we define the next amazing science term which is niche, defined as the specific job that each creature does within the ecosystem. We then continue by asking the students what it would be like if everybody in their school did the same job. The answers are usually like it would be boring or maybe a bit crazy. A diversity of niches keeps a school operating properly, and the same holds true for ecosystems! Then we play another guessing game where we show them a poster with a zoomed-in picture of an airplane wing. Students must try to guess what they’re seeing. After they eventually guess it, we then ask them what would happen if each of the rivets were a different species and what would happen if the rivets were to be pulled out one by one. The wing would eventually collapse, which ultimately represents the collapse of the ecosystem.
Next we use a banner to show the students the trophic level pyramid. After we explain the pyramid, we play a game of Biodiversity Jenga. In this competitive game, the Jenga blocks are painted in different colors that match the colors of the previously seen trophic level pyramid. We then pull situations out of a jar that determine which blocks are to be pulled out each round. It’s survival of the fittest – which team can keep their ecosystem standing the longest? We continue the game until one of the Jenga towers has fallen. We then recap some of the situations that took place during the game.
We want to be sure that students are thinking about biodiversity right here in Iowa, not just faraway places like the Amazon Rainforest, so we like to bring local species and examples into the conversation. In particular, we focus on the Topeka Shiner, a native fish (endangered species) whose habitat has been altered. They prefer to live in oxbows, with slow-moving water and surrounded by trees and other plants that keep the water temperature cool. Yet many of the oxbows have gone through a process called channel straightening, which makes the living conditions much harder for the Topeka Shiner.
So to allow the students to walk a mile in the Shiners’ shoes, we play a game called Musical Oxbows. This game is very similar to musical chairs except instead of using chairs we use carpet squares, painted to represent the meandering bends in rivers. This game also has situations that affect the available habitat for the Topeka Shiner – each round, a new situation is read which means 3-4 habitat spaces are removed. When the music stops, Topeka Shiners must find a spot in the oxbow or they are eliminated! As this game continues, eventually there will only be a couple Topeka Shiners remaining and then the game is complete. Again, we ask the students to recap the different situations that affected the Topeka Shiner, to help solidify those concepts in their minds.
The last few things that we talk about are few different solutions/ideas of what we can all do to protect nature around us. Lastly, we have them answer the same trivia question that we asked at the beginning of the presentation, which helps us to evaluate our effectiveness in the classroom. We then send the students on their way and reorganize our posters, rebuild each Jenga tower, pick up Musical Oxbows, and more — resetting for the next class which usually starts in just 3-5 minutes!