2 Characteristics of an Ecosystem An organism’s environment – the surroundings in which it lives – provides it with the specific things it needs.Every environment is made up of both biotic, living, and abiotic, nonliving parts.Biotic parts include every living thing within it – trees, plants, grass, animals, fungus, bacteria.Abiotic parts include– land, water, air, minerals, sunlight, temperature, and rainfall.
3 Organisms in an Ecosystem A habitat is the part of the environment where an organism lives. Organisms can share a habitat if their needs are the same.A habitat has food, water and shelter.
4 Organisms of the same species living together in the same place make up a population. Oak trees living together in the forest.Tree frogs living together in a pond.
5 Many populations living in the same environment at the same time make up a community. A community and the abiotic parts of its environment make up an ecosystem.An ecosystem can be as small as a leaf and as large as a forest.
6 Abiotic Factors Affect Ecosystems Abiotic factors determine the kinds of plants and animals that can live in an ecosystem.***The climate (rainfall) is the most important factor.The job of an organism in an ecosystem is a niche. It includes everything the organism needs and everything it does.
7 Land BiomesA biome is a region of the world defined by its climate and the unique plants and animals that live there.
8 Tundra Grassland Desert Deciduous Forest Taiga Tropical Rain Forest Biomes of the WorldTundraGrasslandDesertDeciduous ForestTaigaTropical Rain Forest
9 Tundra Rainfall: 10 inches per year Temperature: extremely cold; weak growing seasonPlants: mosses and lichensAnimals: caribou, arctic hare, wolves, arctic fox
10 Grassland Rainfall: 30 inches per year Temperature: variable Plants: grasses with scattered trees and flowersAnimals: gazelle, zebra, kangaroo, deer, prairie dog, mole, lion, hawk
11 Desert Rainfall: 10 inches per year Temperature: extremes; hot days and cold nightsPlants: cactus and woody shrubsAnimals: reptiles, coyote, badger, owl and eagle
12 Deciduous Forest Rainfall: 50 inches per year Temperature: cold winters and warm summers; 6 month growing seasonPlants: broad leaved trees, loose leaves in fallAnimals: squirrel, rabbit, skunk, birds, deer, fox, wolf, black bear
13 Taiga Rainfall: 20 inches per year Temperature: very cold; short growing seasonPlants: conifers, evergreen with needlelike leavesAnimals: moose, caribou, bear, weasel, lynx, fox, wolf, deer, chipmunk, hawk
14 Tropical Rain Forest Rainfall: 100 inches per year Temperature: 68 – 77 degrees FahrenheitPlants: 100 different tree species per square kmAnimals: highly diverse with insects, bats, birds and mammals