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Ecology


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Ecosystems

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A biological community of interacting organisms and their physical environment.

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Ecosystems
A biological community of interacting organisms and their physical environment.
Biotic Factors
Living things in an ecosystem
Abiotic Factors
Non-living factors including temperature, water, sunlight, wind, rocks and soil
Population
A group of organisms of the same species populating a given area
Communities
Different populations that live together in a defined area
Habitats
Places where animals or plants naturally live and grow
Invasive Species
Species that enter new ecosystems and multiply, harming native species and their habitats
Invasive Species
Species that enter new ecosystems and multiply, harming native species and their habitats
Symbiosis
The relation between two different species of organisms that are interdependent
Mutualism
A close relationship; both species benefit
Commensalism
A close relationship; one species benefits, the other doesn't benefit but isn't harmed
Parasitism
A close relationship; one species benefits, the other is harmed
Potential Niche
The entire range of resource opportunities an organism is potentially able to occupy within an ecosystem
Fundamental Niche
Niche where an organism is actually able to live
Producer
Organisms that can make their own food
Consumer
Organisms that take in food material and are above producers on the energy pyramid
Consumer
Organisms that take in food material and are above producers on the energy pyramid
Herbivores
Consumers that only consume plants
Carnivores
Consumers that only consume animals
Omnivores
A consumer that eats both plants and animals
Decomposers
Organisms that break down wastes and dead organisms and return raw materials to the environment
Food Chain
A series of steps in which organisms transfer energy by eating and being eaten
Food Web
Shows how food chains are related within an ecosystem
Trophic Level
Organism in a food chain that represents a feeding step in the passage of energy and materials through an ecosystem
Carbon Cycle
The organic circulation of carbon from the atmosphere into organisms and back again
Ecological Succession
The gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established
Pioneer Species
The first species to live in an area of primary succession
Climax Community
A stable, mature community that undergoes little or no change in species over time.
Growth Rate
Rate of increase or decrease of a population
Generation Time
Average time between one generation of offspring and the next
Exponential Growth
Occurs when the individuals in a population reproduce at a constant rate
Carrying Capacity
Largest number of individuals of a population that a environment can support
Tundra
Cold and largely treeless across northern North America
Tropical Rainforest
Hot, moist biome where it rains all year long. Known for its dense canopies of vegetation that form three different layers.
Shrubland
Made up of shrubs or short trees. Many shrubs thrive on steep, rocky slopes.
Savanna
Often described as an area of grassland with dispersed trees or clusters of trees. The lack of water makes the savanna a difficult place for tall plants such as trees to grow. Grasses and trees that grow in the savanna have adapted to life with little water and hot temperatures.
Temperate Deciduous Forest
Distinct seasons and moderate climate
Grassland
Grasslands are generally open and continuous, fairly flat areas of grass. They are often located between temperate forests at high latitudes and deserts at subtropical latitudes.
Taiga/Boreal Coniferous Forest
A forest biome dominated by coniferous trees
Grassland
Prairies, steppes, pampas, veldts; near the equator, characterized by treeless areas and tall grasses.
Desert
Desert biomes are the driest of all the biomes. In fact, the most important characteristic of a desert is that it receives very little rainfall. Most deserts receive less than 300 mm a year compared to rainforests, which receive over 2,000 mm.
Ecology
The study of interactions between organisms and their environment