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Freshwater Biome Food Web

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Nina Stiglich

on 26 September 2014

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Transcript of Freshwater Biome Food Web

Food Chain #1
Food Chain #2
Top 2 Carnivores
1. Ponds & Lakes
Ponds: seasonal, lasting just a couple of months (such as sessile pools)

Lakes: may exist for hundreds of years or more

Limited species diversity-often isolated from one another & from other water sources like rivers and oceans

3 different “zones” determined by depth & distance from the shoreline:
Topmost-
Littoral
Near-Surface->
Limnetic
Deep-Water->
Profundal
Freshwater Biome
Freshwater: having a low salt concentration— usually less than 1%

Plants & animals are adjusted to the low salt content and would not be able to survive in areas of high salt concentration (i.e., ocean)

There are different types of freshwater regions:
Ponds & lakes
Streams & rivers
Wetlands
Freshwater Biome Food Web
Nina Stiglich
Friday, September 26, 2014
Mr. Martin
IBD ESS 11-7

2. Streams & Rivers
Bodies of flowing water moving in one direction

Streams & rivers can be found everywhere-start at headwaters (springs, snowmelt, lakes) and travel to their mouths (water channel or the ocean)

Water changes very much during the travel from the headwaters to the mouths
1. Heron
2. Carp
3. Wetlands
Areas of standing water that support aquatic plants such as marshes, swamps, bogs
Hydrophytes: plant species adapted to very moist and humid conditions (pond lilies, cattails, sedges, tamarack, black spruce)
*Highest species diversity of all ecosystems
Many species of amphibians, reptiles, birds, and furbearers
Exception-salt marshes (shrimp, shellfishes, various grasses)
Cattail
Lily Pads
Duckweed
Algae
Plankton
Frog
Butterfly
Slug
Roundworm
Duck
Lizzard
Turtle
Heron
Carp
Decomposers
Funghi
Bacteria
Energy Source
Producer
Primary Consumer
Secondary Consumer
Tertiary Consumer
Energy Source
Producer
Primary Consumer
Secondary Consumer
Tertiary Consumer
Extinction of Primary Consumers
The population of secondary and tertiary consumers would decrease since they would not have a food source, and the population of the producers would increase since they would not have a predator.
Extinction of Decomposers
Soil will not get the nutrients by the decomposition of dead matter and hence the soil will become infertile
Plants will not grow and hence, due to absence of the producers, the grazing food chain will not start and hence the animals will starve to death
Food chain will end
Non-Native Species Severely Deplete
Population of Producers
There would be competition for the producers, and the population of all secondary consumers would decrease. Tertiary consumers would start to decrease as well. However, since there are many producers, the ecosystem will survive.
Food Webs w/ Many Species are More Resilient Than Those w/ Few Species
If anything happens to one specific species, the other species in the same section will allow the ecosystem to survive: each species does not depend on only one food source but can eat from many.
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