Freshwater EcosystemBy:Alicia Cisco and Luke Whitlow

Freshwater ecosystems are a subset of Earth’s aquatic ecosystems. Less than 0.5 parts per thousand of

dissolved salts.Examples:•Ponds•Lakes

•Wetlands•Bogs

•Swamps•Streams

•Inland Seas•Rivers

Climate Factors

Temperature Summer: 4˚C at bottom and

22˚Cat top Winter: 4˚C at bottom and 0˚C at

top Spring and Fall: 4˚C

Annual Rainfall 10-80 inches per year

Vegetation Mangroves Pickle Weed Water Lilies Algae Duckweed Cattails Reeves Mosses

Animals

Amphibians: frogs and newts Reptiles: snakes and alligators

Birds: bald eagle, crane, great blue heron Furbearers: bobcat, beaver, deer,

raccoon, Insects: dragon flies, Earth worm,

mosquito, snails, spiders

Fish

Net primary production For lakes and streams 250gC/m²/yr

Location Anywhere at any latitude outside of the

polar regions

Limiting Factors Light Oxygen Temperature Salinity Food Space pH Nutrients Nitrates

Human Impact Dam's block fish migration routes and

destroy plants and animals Pollution from runoff of agriculture and

urban areas Global warming produces devastating

floods and droughts Invasion of exotic species harm native

animals and plants

Human Impact• Humans destroy habitat • 40% of fish species live in fresh water

• This has declined by 20% in the last 20 years

Uses• Drinking• Energy and transportation• Boating and fishing• Fishermen and researchers• Hydroelectric power

Culture Farming Fishing

House Boats Boating

Works Cited Page http://www.ucmp.berkeley.edu/exhibits/biomes/fresh

water.php www.globalchange.umich.edu envscibiomes.wikispaces.com www.epa.gov content.time.com www.bubblews.com www.kompulsa.com www.omoegua.com www.globalcitizencorps.org www.jackspets.com