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Worming Their Way In: Invading Earthworms in the Southeastern United States

  • Article
  • Middle School
  • 1 Classroom Period
  • Active Forest Management
  • Insects
  • Earthworms
  • Invasive Species
  • Native
  • Nonnative
drawing of a bird with a worm in its beak
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Native earthworms are important to the health of forests. Native earthworms help maintain the forest floor by eating leaves and other plant materials. These earthworms

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tunnel and eat through soil, making it rich with nutrients for plants to grow. Many animals that live in the forest depend on native earthworms as a source of food. The scientists wanted to know how many native versus nonnative earthworms there are in undisturbed soils in north Georgia.

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Worming Their Way In: Invading Earthworms in the Southeastern United States

Jump To

  • Meet the Scientists
  • Thinking About Science
  • Thinking About the Environment
  • Introduction
  • Methods
  • Findings
  • Discussion

Meet the Scientists

Mac Callaham

Mac Callaham

Soil Scientist

My favorite experience was collecting earthworms in a pristine cloud forest on top of the highest peak in Puerto Rico. We found earthworms that are found nowhere else in the... Read Full Bio
Paul Hendrix

Paul Hendrix

Soil Scientist

My favorite science experience was conducting an earthworm survey in an old-growth Douglas-fir forest in Oregon. The air was cool and smelled like conifers. All we found were native earthworms... Read Full Bio

Thinking About Science

Earth is home to millions of plant and animal species. With so many different types of plants and animals, scientists needed a system for organizing and describing the various species they study. They created a taxonomic system that can be used to classify all living things (figure 1). Scientists all over the world use the same system. It helps them understand how living things relate to one another, and allows them to share information about their research.

Pyramid of classification for all living organisms
Figure 1. The Pyramid of Classification for all living organisms. Humans are used as an example to show how organisms are grouped and identified (using the taxonomic system). The taxonomic name for humans is in parentheses for every level of classification. Do you think birds are in the same Kingdom as humans? Why or why not? Do you think they are in the same Class as humans? Why or why not?

In this study, the scientists discovered a species of earthworm that did not normally live in the area in which it was found. They identified this earthworm by its taxonomic name, and that is the name they used in this study. All living things have taxonomic names, and most living things
also have common names. Homo sapiens is a taxonomic name. Taxonomic names are always italicized. What is the common name of Homo sapiens? If you need a hint, see the caption under figure 1.

When do you find it helpful to organize information?

Organization can help you complete tasks at school and at home, like cleaning your room or completing a large project.

  • Give an example of when being organized helped you accomplish a task.
  • Identify two specific ways you used organization to accomplish the task. Now, identify a task you need to do in the next week.
  • How can you organize information to help you accomplish the task?

Thinking About the Environment

Native plants and animals have adapted over a long period of time to live in a particular natural area. They help keep the natural area healthy and contribute to its health by protecting water quality, providing food and shelter for native animal species, and enriching soils for other native plants to grow.

 

Plants and animals that are not native either move into a new area on their own, are carried on other objects, or are purposely brought into a new area by humans. These nonnative plants and animals can upset the natural balance of native plants and animals. When this happens, scientists say that the nonnative plants and animals are invasive.

 

Invasive plants and animals often reproduce more rapidly than native plants and animals. Natural areas lack the animals that would otherwise feed on the invasive plants and animals.

 

Invasive species, therefore, consume what is needed for survival by native species. This includes things like water, space, and food. Invasive plants and animals can disrupt the balance so much that they put the health of the natural area in danger. In this study, the scientists were interested in learning whether invasive earthworms had invaded a forest.


Introduction

Native earthworms are important to the health of forests. Native earthworms help maintain the forest floor by eating leaves and other plant materials. These earthworms tunnel and eat through soil, making it rich with nutrients for plants to grow. Many animals that live in the forest depend on native earthworms as a source of food.

 

Scientists have learned that in disturbed soils, nonnative earthworms are found more often than native earthworms. Disturbance occurs during agriculture and when moving soil for road or building construction (figure 2). In forest soils where there has not been much disturbance, scientists believed they would find higher numbers of native earthworms compared to nonnative earthworms. The question the scientists wanted to answer in this study was: Are there more native or nonnative earthworms living in undisturbed forest soils in north Georgia?

 

A construction site with disturbed soil
Figure 2. Construction of new buildings and roads disturbs the native soil.

 

 

Reflection Section

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Methods

The scientists set out traps to capture earthworms living in the forests of north Georgia. The scientists used a special kind of trap called a pitfall trap to collect earthworms (figures 3a, 3b, and 3c).

 

A pitfall trap

Figure 3a. Pitfall trap.

A pitfall trap in the ground

Figure 3b. The traps were placed so that the ground’s surface was level with the opening. In this way, worms could fall into the trap.

A person placing a lid over the trap

Figure 3c. Lids placed over the traps kept rainfall from getting in.

Figures 3a, 3b, and 3c. The scientists used pitfall traps to collect earthworms. The cover prevented rain from filling the trap. To check the pitfall traps, the scientists removed the cover and collected the earthworms and other animals that happened to crawl inside of it.

Pitfall traps are designed to capture small animals and insects that travel along the ground. To make these traps, the scientists dug small holes into the ground. They then put traps into the holes, making sure that the top of each cup was level with the soil on the forest floor. They placed lids on the traps to keep rain water from getting in. Finally, they poured a small amount of liquid preservative into each trap to preserve any earthworms that fell into the traps.

 

The scientists placed a total of 1,125 pitfall traps across 20 different locations in north Georgia (figures 4 and 5). They placed the traps in areas near rocks, fallen logs, and piles of leaf litter where they knew small animals and earthworms were likely to live.

 

Map of the U.S. with Georgia highlighted

Figure 4. Georgia is located in the Southeastern United States.

A topographic map of Georgia

Figure 5. A topographic map is a type of map that shows an area’s elevation. Elevation is the height of the land above sea level. Some topographic maps use lines to show elevation, but this map uses shading. The lightest areas are the areas with the highest elevation. The darker the area’s shading, the lower its elevation.

The dots on this map mark the places where the scientists set the pitfall traps. Look closely at the map. What do you notice about the location of the pitfall traps? What is the range in elevation for the areas where most of the pitfall traps were set?

Number Crunch

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The scientists collected earthworms for 5 months during the summer and fall. They checked the traps every other week. The earthworms that fell into the traps were examined and sorted (figure 6). The scientists then determined the species of each individual earthworm. The scientists also counted the total number of earthworm species they collected.

Scientist working in the field
Figure 6. The scientists sorted the earthworms from the other types of animals they found in the pitfall traps before identifying the species of each earthworm.

Reflection Section

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Findings

The scientists collected over 600 earthworms from their traps over the 5-month period. More than 75 percent of the earthworms were identified as invasive species. Another 20 percent of the earthworms were too young for the scientists to identify as being either native or invasive. The scientists identified only 4 percent of the earthworms collected as native species.

 

Of the invasive earthworms collected, 96 percent were from a single species, Amynthas agrestis (figure 7). Amynthas agrestis is the taxonomic name for these earthworms, just as Homo sapiensp is the taxonomic name for humans.

 

This particular species of earthworm is native to Japan (figure 8). Amynthas agrestis was first found in California in the early 1900s. However, scientists believe most of these earthworms were brought to the United States in the 1950s when it was popular to plant Japanese trees and other Japanese plants.

 

 

detail image of Amynthas agrestis

Figure 7. Amynthas agrestis.

Globe highlighting Japan

Figure 8. Japan is located in the northeastern Pacific Ocean.

The scientists were able to catch large numbers of these earthworms because they live in the leaves that cover the forest floor. In comparison, almost all native earthworms live in the soil. Most of the earthworms you see crawling on the ground, or out after a rain, are not native species. Not all nonnative earthworms, however, eat as much leaf litter as Amynthas agrestis.

Reflection Section

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Discussion

The invasive earthworm species found by the scientists is native to Japan. In the 1950s, people brought this species to the United States from Japan. People also helped the species to spread across the United States and into forested areas by using the worms for fish bait. Anglers often discard unused earthworms on the ground after fishing. The earthworms quickly become adjusted to their new habitat and begin to reproduce.

Invasive earthworms cause change in the natural areas into which they are introduced. They limit the amount of food available for native earthworm species. They do this by eating what native earthworm species eat and by occupying the places native earthworms live (figure 9) Amynthas agrestis quickly consumes (eats) large amounts of leaf litter in comparison with other nonnative earthworms. The quick consumption of leaf litter by Amynthas agrestis led scientists to consider them an aggressive invasive species.

Illustration of leaf litter and of a bird eating a worm
Figures 9a and 9b. These illustrations show how invasive earthworms can affect the forest floor. (Adapted from “Invaders of the Forest,” an original illustration by Steve Mortensen for the Wisconsin Department of Natural Resources).

One of the greatest concerns raised in this research was that invasive earthworms might be changing the forest floor in north Georgia forests. This decreases the ability of forests to provide habitat for native earthworm species and other animals that live on the forest floor, including salamanders, mice, insects, and snakes.

Scientists should continue to conduct research on invasive earthworms. Scientific research provides forest managers with information the managers need to make better decisions. This research also helps managers develop information that discourages people from introducing invasive earthworms to new areas.

Number Crunches

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Reflection Section

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Think about the article you just read. You learned that many of the native species must move to a new area when invasive species take over an area. Look carefully at the drawing below. Do you think that all native species are harmed when invasive species are present? Why or why not? Do you think a native species might benefit in some way? Why or why not?

 

Let’s say a native species benefits in some way from the arrival of an invasive species. Do you think the environmental balance can be upset even when a native species benefits? Why or why not?


This article was adapted from: Callaham, M. A., Hendrix, P. F., and Phillips, R. J. (2002). Occurrence of an exotic earthworm (Amynthas agrestis) in undisturbed soils of the southern Appalachian Mountains, USA. Pedobiolagia, Vol. 47:466-470. http://www.srs.fs.usda.gov/pubs/ja/ja_callaham001.pdf

Cover of Worming their Way In. Illustration with a bird picking up a worm.

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Worming Their Way In - Vol. 1 No. 2

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  • PDF Preview of Worming Their Way FACTivity
    The questions you will answer with this FACTivity are: Are earthworms a part of your schoolyard habitat? and How much difference exists among the types of soil-dwelling organisms that live...

    FACTivity – Worming Their Way In

    • Activity
    • Middle School
    • 1 Classroom Period
    • 2-3 Classroom Periods
    • Insects
    • Data Collection
    • Earthworms
    • Invasive Species
    • Outdoor Activity
    • Pitfall Trap
    • Student Research
    The questions you will answer with this FACTivity are: Are earthworms a part of your schoolyard habitat? and How much difference exists among the types of soil-dwelling organisms that live...
    • Explore Activity
    • Download Activity (PDF)
    • Explore Activity
    • Download Activity (PDF)

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    Worming Their Way In: Invading Earthworms in the Southeastern United States

  • PDF preview of alternative FACTivity: Taxonomic Structures (from "Worming Their Way In")
    In groups, you will develop a taxonomic structure for a category of objects. The question you will answer in this FACTivity is: How are taxonomic structures useful to people?

    Alternate FACTivity – Taxonomic Structures

    • Activity
    • Middle School
    • 1 Classroom Period
    • Categorizing
    • Organization
    • Taxonomy
    In groups, you will develop a taxonomic structure for a category of objects. The question you will answer in this FACTivity is: How are taxonomic structures useful to people?
    • Explore Activity
    • Download FACTivity (PDF)
    • Explore Activity
    • Download FACTivity (PDF)

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    Worming Their Way In - Vol. 1 No. 2

  • PDF Preview of Worming Their Way In Word Search
    After reading “Worming Their Way In,” test your vocabulary knowledge with this word search.

    Word Search – Worming Their Way In

    • Activity
    • Middle School
    • Less than 30 minutes
    • Invasive Species
    • Native Species
    • Taxonomy
    • Vocabulary
    After reading “Worming Their Way In,” test your vocabulary knowledge with this word search.
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Standards addressed in this Article:

The Next Generation Science Standards (NGSS) are a set of K-12 science education standards emphasizing inquiry-based learning, real-world applications, and integrating engineering practices, aiming to deepen understanding of science while promoting critical thinking and problem-solving skills.
  • ESS3.C-M1
    Human activities have significantly altered the biosphere, sometimes damaging or destroying natural habitats and causing the extinction of other species. But changes to Earth’s environments can have different impacts (negative and positive) for different living things.
  • LS2.A-M1
    Organisms, and populations of organisms, are dependent on their environmental interactions both with other living things and with nonliving factors.
  • LS2.A-M2
    In any ecosystem, organisms and populations with similar requirements for food, water, oxygen, or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction.
  • LS2.A-M3
    Growth of organisms and population increases are limited by access to resources.
  • LS2.A-M4
    Similarly, predatory interactions may reduce the number of organisms or eliminate whole populations of organisms. Mutually beneficial interactions, in contrast, may become so interdependent that each organism requires the other for survival. Although the species involved in these competitive, predatory, and mutually beneficial interactions vary across ecosystems, the patterns of interactions of organisms with their environments, both living and nonliving, are shared.
  • LS2.B-M1
    Food webs are models that demonstrate how matter and energy are transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem. Transfers of matter into and out of the physical environment occur at every level. Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem.
  • LS2.C-M1
    Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
  • LS2.C-M2
    Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s biodiversity is often used as a measure of its health.
  • LS4.D-M1
    Changes in biodiversity can influence humans’ resources, such as food, energy, and medicines, as well as ecosystem services that humans rely on—for example, water purification and recycling.
The Common Core Standards are educational benchmarks in the United States that outline clear expectations for what students should know and be able to do in English language arts and mathematics from kindergarten through 12th grade, aiming to ensure consistency and coherence in education nationwide.
  • Cite specific textual evidence to support analysis of science and technical texts.
  • By the end of grade 8, read and comprehend science/technical texts in the grades 6-8 text complexity band independently and proficiently.
  • Determine the central ideas or conclusions of a text; provide an accurate summary of the text distinct from prior knowledge or opinions.
  • Follow precisely a multistep procedure when carrying out experiments, taking measurements, or performing technical tasks.
  • Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6-8 texts and topics.
  • Analyze the structure an author uses to organize a text, including how the major sections contribute to the whole and to an understanding of the topic.
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  • Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table).
  • Distinguish among facts, reasoned judgment based on research findings, and speculation in a text.
  • Compare and contrast the information gained from experiments, simulations, video, or multimedia sources with that gained from reading a text on the same topic.
Social Studies Standards are educational guidelines outlining the essential knowledge, skills, and concepts students should learn in subjects such as history, geography, civics, and economics, aiming to provide a comprehensive understanding of societal structures, historical events, and global perspectives.
  • People, Places, and Environments
  • Science, Technology, and Society
  • Time, Continuity, and Change

What Is a Natural Inquirer Monograph?

3 Natural Inquirer monograph covers.

 

A Natural Inquirer monograph is a short publication that focuses on a single research study. Monographs are written for a middle school audience, but they can also be adapted for both high school students and advanced upper elementary students.

Monographs include:

  • One article based on a published, peer-reviewed research paper; the article keeps the research paper format (see more below) but is written in language students can understand.
  • A FACTivity, which is an activity to complete after reading the article. The FACTivity helps reinforce major science concepts from the article. These activities are designed to be easy to implement, with few material requirements and options for adapting them for your audience or available resources. Some monograph may have two FACTivities.
  • A short “Welcome to the monograph” article about key background information and science concepts.
  • A glossary of new terms from the article or the introductory materials.
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  • Standards correlations, including Next Generation Science Standards, addressed in both the article and the FACTivity.

Monographs may also include additional essays (called spotlights), other activities (like crossword puzzles or vocabulary challenges), and more.

 

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What's in a Natural Inquirer Article?

Here, we'll go into more detail about the parts of a Natural Inquirer article and give you some ideas about how they can be used.
  1. Meet the Scientists

    This section introduces the scientists (and others) who worked on the study. In their own words, they each share a memorable science experience, a favorite research project, or something they learned during the course of their education or research.

    Use this section to:

    • Introduce kids to the variety of people who work in science
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    Next Generation Science Standards applications:

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    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    You can use key words to search for other or related scientific topics on our website (e.g. “longitudinal study,” “bias,” or “sampling”).

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  3. Thinking About the Environment

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    Use this section to:

    • Provide important background information to help students understand the research study
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    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
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    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    You can use key words to search for more resources on life or earth science topics on our website (e.g. “habitat,” “carbon,” or “genetics”).

    A sample "Thinking About the Environment" section from a recent monograph
  4. Introduction

    This section begins the scientific article format. Much like the published, peer-reviewed study this article is based on, the introduction provides background information for the study – what is currently known and what remains unknown. The introduction culminates in the question(s) the study hopes to answer.

    The introduction is also the first section with a Reflection Section. This section includes two or three questions to help kids reflect on what they’ve just learned in the Introduction. If they are using the online distraction-free reading mode, they can answer these questions directly on the website.

    Use this section to:

    • Review important background information that kids need to understand the study
    • Connect the study to the concepts addressed in the Thinking About Science and Thinking About the Environment sections
    • Understand research questions and hypotheses, including generating their own hypotheses given what they already know

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    Use one of the guided reading lesson plans to help kids follow the format of a scientific paper.

    A sample introduction page from "Hidden in Plain Sight"
  5. Methods

    This section is the nuts and bolts of the study design – the who, what, when, where, why, and how of the research. Contained within the Methods section are usually maps of the study location or the set-up of study plots, as well as details about what data was collected and how.

    The Methods section also ends with a Reflection Section – two or three questions to help students think through what they just read. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Show students how experiments and studies are designed and carried out
    • Explore sampling methods and randomization
    • Introduce various data collection tools (e.g. camera traps, surveys, insect collection tools, weather stations, etc.)
    • Explain bias and how studies are designed to remove bias
    • Help students gain experience with map reading

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    Many Methods and Findings sections contain Number Crunches, which are simple math exercises designed to help students interact with the data from the study.

    A sample methods section of a monograph article showing a map
  6. Findings

    This section summarizes the data collected during the study. The Findings section usually includes data tables or graphs and highlights the significant data points from the study. This section often mentions statistical analysis or the use of computer programs to model or analyze the data, though these methods are only discussed generally.

    The Findings section also ends with a Reflection Section – two or three questions to help students think through what they just read. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Have students practice reading and interpreting graphs and tables
    • Compare results between variables and controls
    • Explain the concept of statistical significance
    • Discuss how no data or negative results still provide valuable information

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    Search the website for “map” or “graph” to find activities where students can practice making and reading maps and graphs.

    The beginning of a Findings section featuring a large data table
  7. Discussion

    This section concludes each monograph article. In it, we summarize the main findings of the scientists’ study. Additionally, we present the scientists’ ideas about the limitations of their study, the big-picture impacts of their research, and the scientists’ plans for future study or action.

    The Discussion section ends with a Reflection Section – two or three questions to help students think through what they just read, especially general take-aways from the study. These questions are interactive on the distraction-free reading mode.

    Use this section to:

    • Discuss what conclusions can and cannot be drawn from the available data
    • Explain the difference between correlation and causation
    • Explore study limitations and opportunities for further study
    • Brainstorm ways the study findings could be applied to real-world situations

    Next Generation Science Standards applications:

    • Life Science and some Earth Science Disciplinary Core Ideas (depending on topic)
    • Most Crosscutting Concepts (depending on topic)

    Note that specific standards for this particular monograph are linked on this educator guide tab.

    Other resources:

    Use the “Designing Your Own Study” resource page for videos of scientists discussing their own research studies. The page also includes educator resources to help students plan their own scientific studies.

    The beginning of the conclusion of "Hidden in Plain Sight"

Additional Resources on the Website

A screenshot of the product tabs for an NI monographOn the website, we pair each monograph with a variety of other resources, as well. Use the tabs on the product page to browse through the following:

  • Related activities, including the FACTivity for each article
  • An “About” essay that gives some larger context for the research the scientists conducted or more information about the science topic from the article
  • A glossary of all boldfaced terms from the article
  • A “Scientists and Collaborators” page that lists the people involved in the study; click on a researcher to reach their bio page and see what other articles they might be featured in
  • A “Related Content” page that lists both Natural Inquirer resources about similar topics and also outside reference materials

Article Selection and Review

Natural Inquirer partners with the USDA Forest Service, so we source research studies by Forest Service scientists that have been peer-reviewed and published in reputable journals. Some of our articles have also been created in collaboration with scientists from other Federal agencies, such as U.S. Geological Survey and the United Nations Food and Agriculture Organization, universities, and other non-profits.

All monograph articles are reviewed by scientists who conducted the original research study to verify scientific accuracy. Monographs are also reviewed by student editorial review boards of middle or high school students before publication. Additionally, all monographs are reviewed by the Forest Service and the U.S. Department of Agriculture before publication.

A screenshot of the citation for "Lights, Camera, Tracks"Every monograph article includes a citation of its source study. Many educators pair the original research paper with our article to help more advanced students learn how to read formal research papers. The monograph article then serves as adapted primary literature, bridging the two articles.

Lessons

  • PDF Preview of Broadcast/Podcast Lesson Plan
    In this lesson plan, pairs of students will create a 60- to 90-minute radio broadcast/podcast based on the article. Creating the broadcast/podcast will involve close-reading a Natural Inquirer article. Graphic...

    Lesson Plan – Make Your Own Broadcast/Podcast

    • Lesson Plan
    • Middle School
    • 1 Week+
    • 2-3 Classroom Periods
    • Guided reading
    • Presentation
    • Reading for Information
    • Science Communication
    In this lesson plan, pairs of students will create a 60- to 90-minute radio broadcast/podcast based on the article. Creating the broadcast/podcast will involve close-reading a Natural Inquirer article. Graphic...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

    Part Of

    Worming Their Way In - Vol. 1 No. 2

  • PDF Preview of Reading a Natural Inquirer Article Lesson Plan
    This lesson plan introduces students to the different sections of a Natural Inquirer article. Additionally, it helps the students understand the content of the article through the use of graphic...

    Lesson Plan – Reading a Natural Inquirer Article – FACELook

    • Lesson Plan
    • Middle School
    • 2-3 Classroom Periods
    • Graphic Organizer
    • Guided reading
    • Reading for Information
    • Scientific Article Format
    This lesson plan introduces students to the different sections of a Natural Inquirer article. Additionally, it helps the students understand the content of the article through the use of graphic...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

    Part Of

    FACELook! Exploring the Relationship Between Carbon, Photosynthesis, and the Roots of Trees

  • Write A Scientist Lesson Plan PDF preview.
    In this lesson plan, students will read a Natural Inquirer article and write a letter to the scientist, asking for clarification on at least four questions. Note: This lesson plan...

    Lesson Plan – Write A Scientist

    • Lesson Plan
    • High School
    • Middle School
    • Upper Elementary
    • 2-3 Classroom Periods
    In this lesson plan, students will read a Natural Inquirer article and write a letter to the scientist, asking for clarification on at least four questions. Note: This lesson plan...
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)
    • Explore Lesson Plan
    • Download Lesson Plan (PDF)

Education Files

Project Learning Tree

If you are a PLT-trained educator, you may use “Nature’s Recyclers” and “Are Vacant Lots Vacant?” as additional resources.

Glossary

View All Glossary
  • angler

    (aŋ glər): A person who catches fish with a hook and fishing line.

  • conifer

    (kä nǝ fǝr): Any of an order of mostly evergreen trees and shrubs that have leaves resembling needles or scales, including trees and shrubs (like pines) that have true cones.

  • forest manager

    (fȯr ǝst ma ni jǝr): A person who manages a forest; in the Forest Service, forest managers focus on managing vegetation, restoring ecosystems, reducing hazards, and maintaining forest health (definition from USDA Forest Service).

  • habitat

    (ha bә tat): The place or environment where a plant or animal naturally or normally lives and grows.

  • invasive

    (in vā siv): Tending to spread especially in a quick or aggressive manner, such as a nonnative species growing and dispersing easily, usually to the detriment of native species and ecosystems.

  • leaf litter

    (lēf li tər): Dead plant material, like leaves and twigs.

  • native

    (nā tiv): Living or growing naturally in a particular region.

  • nonnative

    (nän nā tiv): Not naturally occurring in an area.

  • organism

    (ȯr gǝ ni zǝm): An individual living thing that carries on the activities of life by means of organs which have separate functions but are dependent on each other: a living person, plant, or animal.

  • pristine

    (pri stēn): Not spoiled, corrupted, or polluted.

  • species

    (spē sēz or spē shēz): A category of living things that ranks below a genus, is made up of related individuals able to produce fertile offspring, and is identified by a two-part scientific name.

  • taxonomic

    (tak sə nä mik): Having to do with the orderly classification of living things according to their presumed natural relationships.

  • Dr. Callaham looking into a microscope.

    Mac Callaham

    Soil Scientist

    My favorite experience was collecting earthworms in a pristine cloud forest on top of the highest peak in Puerto Rico. We found earthworms that are found nowhere else in the...
    View Profile
  • Dr. Hendrix wearing a safety hat

    Paul Hendrix

    Soil Scientist

    My favorite science experience was conducting an earthworm survey in an old-growth Douglas-fir forest in Oregon. The air was cool and smelled like conifers. All we found were native earthworms...
    View Profile

Jump To

  • Additional Resources

Additional Resources

  • Earthworm Diversity Linked to Latitude and Isolation

    Earthworms don’t get enough attention, according to USDA Forest Service research ecologist Mac Callaham. Callaham and others examined the diversity of two groups of species: aquatic (Sparganophilus spp.) and terrestrial (Diplocardia spp.) earthworms. The researchers chose these groups because both are native to North America, and both were expected to harbor species that had never been collected before. Learn more about their research here.

    Visit Website
  • Invasive Jumping Worms Are Also Ecosystem Engineers

    A worm is a worm is a worm, right? Except that there are more than 7,000 species of worms, and the longer you look, the more complex their world becomes. Earthworms compete. Earthworms invade. Earthworms… jump?

    Visit Website
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The Natural Inquirer program produces a variety of science education materials for PreK through grade 12. Natural Inquirer products are produced by the USDA Forest Service, FIND Outdoors, and other cooperators and partners.

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