Nature is a backdrop to you
You enjoy it and cannot see the machinery.
Courses
Start with three things you can do today
How ecosystems stay in balance
Understand how living things depend on each other.
Ecosystems change through interactions among organisms and their surroundings. A food web helps explain possible pathways of change, but it does not predict a single fixed balance. Compare competing explanations before crediting one species with every later change.
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A starting goal
I want to understand how living things depend on each other. Use examples of food webs, biodiversity, and ecological change to explain what makes an ecosystem resilient.
Change any word so it fits your situation. The course is built from what you type and a few setup questions.
Start today
Three things you can do before the course exists.
Useful on their own. The course is for when you want the whole skill, not just the first move.
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Draw a small hypothetical food web
Imagine a pond where small grazers eat algae and fish eat the grazers. Draw arrows from food to consumer: algae to grazers, then grazers to fish. This deliberately simplified example describes feeding relationships, not a measured pond or a complete ecosystem.
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Make a prediction with its assumptions
If fish numbers increase and eat more grazers, grazing pressure on algae could fall. Under those assumptions, algae might increase. Check: this is an indirect effect through another species. It is not proof that adding fish will always increase algae. Nutrients, light, other grazers and other fish diets could change the result.
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Compare the model with real evidence
Yellowstone provides a useful caution. The National Park Service describes wolves, elk, vegetation and other influences, including groundwater, rather than one simple river-restoration story. Ask which changes were measured, what else changed and which proposed links remain debated.
Sources: National Park Service: Yellowstone ecosystem processes and competing explanations. Practical examples are starting points, not promised results.
- Best for
- Science & nature
- Prerequisites
- None. Bring the situation you have.
- Course length
- 7 to 30 lessons
- Pace
- Yours. One lesson at a time, as often as you like.
- Format
- Read it, or play the audio
- Access
- Available on the App Store and Google Play, with an optional early testing list
Before the course is built
Setup asks about your situation first.
Lesson 1 opens on the moment you describe, and the examples use your role. For this request, expect questions like these.
- What drew you: a place you love, environmental news, gardening, or the science itself?
- Are you more interested in how ecosystems work or how they break?
- Is there a local environment you would like to understand better?
Right for now
If any of this sounds familiar, start here.
Environmental news leaves you confused
Collapse and recovery stories with no framework to place them in.
You garden or walk and have questions
Why this thrives and that fails, and what the insects are doing.
Course arc
Where the course goes, in order.
Cadence writes the lessons for you, so the exact path follows your answers. This is the ground a course built from this sentence covers.
01 / 06Energy and nutrients
Distinguish energy moving through a system and dissipating as heat from nutrients cycling through it.
Food webs
Connections, keystones and what happens when one link goes.
Biodiversity
Why variety matters for stability, and what is lost with it.
Change and succession
How ecosystems shift over time, naturally and under pressure.
Resilience and tipping points
Feedback loops, thresholds and why recovery is not guaranteed.
Your local ecosystem
Applying the ideas to a park, garden, shore or woodland you know.
What changes
What you will be able to do, and what you will stop believing.
You will be able to
Read a food web
See how energy and nutrients move through a living system.
Understand resilience
Explain why some ecosystems absorb shocks and others collapse.
See it locally
Recognize the dynamics in a place you know.
Ideas this course corrects
An ecosystem has one permanent balance
Populations and conditions vary. A useful explanation identifies a time span, pressures and possible feedbacks.
One species causes every later change
Indirect effects are possible, but timing alone cannot isolate a cause. Check competing influences and the evidence for each link.
Course questions
What to know before you start.
How ecosystems stay in balance: what can I do today?
Draw a small hypothetical food web. Imagine a pond where small grazers eat algae and fish eat the grazers. Draw arrows from food to consumer: algae to grazers, then grazers to fish. This deliberately simplified example describes feeding relationships, not a measured pond or a complete ecosystem. Make a prediction with its assumptions. If fish numbers increase and eat more grazers, grazing pressure on algae could fall. Under those assumptions, algae might increase. Check: this is an indirect effect through another species. It is not proof that adding fish will always increase algae. Nutrients, light, other grazers and other fish diets could change the result. Compare the model with real evidence. Yellowstone provides a useful caution. The National Park Service describes wolves, elk, vegetation and other influences, including groundwater, rather than one simple river-restoration story. Ask which changes were measured, what else changed and which proposed links remain debated.
Is this a fixed course?
No. Cadence builds the course when you type the sentence and answer a few setup questions, so the lessons follow your situation. This page describes what a course built from this request covers. You see the whole path before Lesson 1.
Who is this course for?
Ecosystems change through interactions among organisms and their surroundings. A food web helps explain possible pathways of change, but it does not predict a single fixed balance. Compare competing explanations before crediting one species with every later change. It sits under Science & nature in the Ideas & discovery part of the library.
Do I need any prior experience?
No. Setup asks what you already know and where you want to use it, and the course starts from there. Bring a real situation if you have one; the examples are built around it.
How long does it take?
Most courses run 7 to 30 lessons. The course length is sized to what you asked for. You set the pace: one lesson at a time, as often as you like. Lessons can be read or played as audio.
Does this course award a certificate or degree?
No. Cadence is for practical self-learning and does not award accredited degrees or professional certification.
Start today
Type it, answer a few questions, open Lesson 1.
A starting goal
I want to understand how living things depend on each other. Use examples of food webs, biodiversity, and ecological change to explain what makes an ecosystem resilient.
Want new features first?