Water Ecology
Explore · Learn · Protect Our Aquatic World
🏞️ Freshwater Ecosystems
Freshwater ecosystems—lakes, rivers, ponds, and wetlands—cover less than 1% of Earth's surface but are home to over 10% of all known species. They provide drinking water, irrigation, and habitats for countless organisms.
Lentic Systems
Still or slow-moving water: lakes, ponds, and reservoirs. Stratified into zones based on light and temperature.
Lotic Systems
Flowing water: rivers, streams, and creeks. High oxygen levels from constant water movement.
Wetlands
Marshes, swamps, and bogs. Nature's kidneys—filtering pollutants and preventing floods.
Marine Ecosystems
Oceans, coral reefs, and estuaries. Cover 71% of Earth and produce over 50% of our oxygen.
🐠 Keystone Species
Some species have a disproportionately large impact on their ecosystem. For example:
- Sea Otters — Control sea urchin populations, protecting kelp forests.
- Beavers — Create wetlands that support hundreds of other species.
- Freshwater Mussels — Filter up to 15 gallons of water per day, each!
- Salmon — Bring ocean nutrients upstream, fertilizing entire forest ecosystems.
🕸️ Interactive Aquatic Food Web
Click on any organism to learn about its role in the ecosystem.
⚡ Energy Flow
Only about 10% of energy transfers from one trophic level to the next. The rest is lost as heat. This is why food chains rarely exceed 4–5 levels—there simply isn't enough energy to support more.
☀️ → 🌿 → 🐌 → 🐟 → 🦈
🔬 Interactive pH Meter
Most aquatic life thrives at pH 6.5 – 8.5. Move the slider to see how pH affects water health.
Temperature
Cold water holds more dissolved oxygen. Many species are sensitive to temperature changes from climate change.
Dissolved Oxygen
Healthy water has 6–8 mg/L of DO. Below 3 mg/L, most fish cannot survive—leading to dead zones.
Nitrates & Phosphates
Excess nutrients from fertilizer runoff cause algal blooms and eutrophication, depleting oxygen.
Turbidity
Cloudy water blocks sunlight for plants and clogs fish gills. Caused by erosion and pollution.
⚠️ Threats to Water Ecology
Water ecosystems face numerous threats from human activity. Understanding these is the first step toward protection.
Industrial Pollution
Heavy metals, chemicals, and thermal pollution disrupt aquatic life cycles and accumulate in the food chain.
Plastic Waste
Over 8 million tons of plastic enter oceans yearly. Microplastics are now found in nearly all aquatic species.
Agricultural Runoff
Pesticides and fertilizers wash into waterways, causing toxic algal blooms and oxygen-depleted dead zones.
Climate Change
Rising temperatures, ocean acidification, and altered weather patterns threaten aquatic biodiversity globally.
💡 What You Can Do
- Reduce plastic use — carry reusable bottles and bags.
- Never pour chemicals or oils down drains.
- Support wetland conservation efforts.
- Participate in local river/lake cleanups.
- Choose sustainable seafood — look for MSC certification.
- Plant native vegetation near waterways to reduce erosion.