Hhmi Trophic Cascades Worksheet Answer Key

Author Hilda 09 Mar 2024

Hhmi Trophic Cascades Worksheet Answer Key - The structure of an ecosystem can be represented by a pyramid made up of. Introduction this handout supplements the short film some animals are more equal than others: The activity is designed to illustrate the species relationships in a food chain and the effect of predators on the trophic levels below. Trophic cascades refer to impacts that reach beyond adjacent trophic levels.

Uncovering The Secrets Key Pdf Answer To Trophic Cascades Exploration

These indirect effects by the predator can trickle down (or cascade) to many lower levels of the food chain. What determines how many species live in a given place? Explore the concept of trophic cascades and their impact on ecosystems with hhmi's interactive resource.

This Click & Learn Shows That Keystone Species Exist Across A Variety Of Ecosystems And Can Exert Their Influence In Different Ways.

These early experiments inspired countless others on keystone species and trophic cascades in ecosystems throughout the world. Keystone species and trophic cascades. Trophic cascades assignment exploring trophic cascades hhmi click and learn go to ecosystems are comprised of community of organisms and their physical

The Structure Of An Ecosystem Can Be Represented By A Pyramid Made Up Of Trophic Levels Such That.

Students complete the worksheet by answering questions as they explore the interactive activity. Trophic cascades and keystone species opens by asking two fundamental questions in ecology: This worksheet is designed for the interactive activity on trophic cascades at hhmi biointeractive.

Students Can Double Click On Each Image And Drag/Drop The Plusses And Minusses Into The Appropriate Places.

Finally, students are asked to apply this knowledge to another example, a graph (also provided by hhmi) that looks at trophic cascades in leaf litter. This graph was originally part of the film guide worksheet, but i extracted it to use as a stand alone assessment. Adding beetles reduced ant numbers and increased the caterpillar population size, proving that the caterpillars are a keystone species in this habitat.

It Highlights 15 Different Keystone Species Around The World From A Variety Of Trophic Levels And Ecological Roles — Including Predators, Herbivores, Scavengers, And Ecosystem Engineers.

Description in this activity, students model trophic cascades using cards of organisms from seven different habitats. Ecosystems are comprised of a community of organisms and their physical environment. Procedure use the information in the film to answer the following questions in the space provided.

Or How Large Can Each Population Grow? The Film Then Describes The Pioneering Experiments By Robert Paine And James Estes, In The 1960S And 1970S, Which Started To Address Them.

I originally made this document in google docs and distributed to students as a google doc. Adding beetles reduced ant numbers and triggered a trophic cascade that decreased the mean leaf area left on plants. Students will need a computer and internet to complete the exploration at hhmi biointeractive while they answer the questions on the worksheet.

Exploring Trophic Cascades Is A 3 Part Click And Learn Activity That Features Short Videos, Graphs, And Graphics.

Download includes the answer key, a printable version, and links to google documents that students can complete remotely or can be shared on lms. Without otters, more sea urchins eat more kelp. Ecosystems are comprised of a community of organisms and their physical environment.

This Handout Goes Along With The Hhmi Biointeractive Exploring Trophic Cascades.

Students used the i2 strategy to interpret the graph and. Trophic cascades and keystone species. Students then test their understanding of trophic cascades in four other case studies, where they predict the relationships among.

Original Document (Original) Exploring Trophic Cascade Click And Learn Printable Version (Editable) Exploring Trophic Cascade Click And Learn

The worksheet helps students to document their thinking and apply their knowledge to the examples and case studies presented in the interactive. Trophic cascades have been described in numerous ecosystems, ranging from kelp forests of the pacific. The presence or absence of sea otters causes a cascade of direct and indirect effects down the food chain, which in turn affect the structure of the ecosystem.

In A Classic Example, Sea Otters Protect Kelp Forests By.

Students learn how the loss or addition of a species, like a fox, can affect other organisms in the system. In this activity, students model trophic cascades using cards of organisms from seven different habitats. Ecologists study the interactions among these organisms and the factors that affect organisms' distribution.

Keystone Species And Trophic Cascades.

Ecologists study the interactions among these organisms and the factors that affect organisms' distribution. The short film some animals are more equal than others: Answer the following questions while watching the video some animals are more equal than others:

A Trophic Cascade Is When A Change At One Trophic Level (Such As The Introduction Or Removal Of A Predator) Causes Impacts At Multiple Other Trophic Levels.

This worksheet is available for free at biologycorner.com. Otters have a positive effect on kelp by preying on sea urchins, which eat kelp. This click & learn first walks students through a classic trophic cascade triggered by the loss of sea otters from a kelp forest ecosystem.

The Activity Is Designed To Illustrate The Species Relationships In A Food Chain And The Effect Of Predators On The Trophic Levels Below.

Trophic cascades occur when predators reduce the abundance or change the activity of their prey, thereby allowing species in the next trophic level to increase in number.