Freshwater Biome

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by KritikaSingh
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Freshwater Biome

Freshwater Biome

Ecology is the branch of biology that studies the interactions of organisms with one another and with their physical and chemical enviroment. The science of Ecology mainly involves research on the natural world.

Dispersal1) Water lilies seed dispersal-produces a fruit that floats in the water. Drops down to the bottom, it takes root, and a new plant grows.2) Phytoplankton seed dispersal-Parent organism makes a carbon copy of himself. It's done by cell division or spores growing inside the parent organism. Then it's released into the water and reproduces.

Brief Explanation of Ecology


Climate-Temperature & Precipitation

Species Interactions

Temporal Change

Spatial Relationships

Population Dynamics

A. Cyanobacteria1) (Def.) Blue + green algae found in most freshwater biomes2) Many animals dependent on cyanobacteria for food a. flies+water fleas wouldn't exist without cyanobacteria b. adequate food for birds, amphibians, etc.3) This and many other aquatic plants provide oxygen through photosynthesis.

B. Phytoplankton1) Vital to aquatic food web a. feed microscopic zoo-plankton to multi-ton whales2) Producers of carbon dioxide through carbon cycle3) Decomposed phytoplankton in "dead zone" can suffocate animal life

C. Symbiosis1) (Mutualism) Algae and fungi work together to form communities called lichens2) (Commensalism) Oysters cling to tree roots a. provides home for oysters but doesn't harm tree

Conclusion: Most species interactions in a freshwater biome are through food.

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Climate: Since freshwater only makes up 0.8% of all the world's water, the freshwater biome is unevenly spread throughout the globe•This causes the climate to be greatly diverse depending on the region •Factors if climate include: location, season, and depth of waterTemperature: Average in Summer = 65°F-75°F (18°C-21°C)•Average in Winter = 35°F-45°F (1°C-7°C)•Closer to sea level the more temperate the biomeParcipitation: The parcipitation depends on the region the biome is located in•Many of the world's wetlands are located in temerate, so they have a greater amount of parcipitation•The greater temperature the greater the parcipitation

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A. Physical, Chemical, and Biotic Limits1) Pollution is a chemical limit for both lilies and phytoplankton becuase if they don't have the right environment, they will die and their seeds will not be dispersed.2) Phytoplankton are eaten by a bigger kind of plankton called zooplankton. When a zooplankton eats a phytoplankton the phytoplankton won't be able to disperse a seed.

B. Adaptation & Natural Selection1) Fish adapted to cooler waters, clearer and higher oxygen level.2) Some mammals are capable of swimming and catching fish for food.3) Manatees in fresh water are able to survive in warm water.

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A. Population Dynamics1) Dependent Variables: Death rate, growth rate, & birth rate2) Independent Variables: Disease, Weather, Pollution

B. Spatial Relationships1) Geographic ranges of many aquatic and wetland species are determined by temperature

C. Temporal Change1) Effects of spatial and temporal change results in negative response from plants and animals2) Climate change in U.S. for next 100 years is bad for freshwater species3) Seasonal shifts in stream runoff will have negative effect on freshwater biomes


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