ecological succession is a gradual and natural change in an ecosystem over hundreds or thousands of...
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Ecological Succession. Ecological succession is a gradual and natural change in an ecosystem over hundreds or thousands of years. Primary Succession. Primary succession is the series of changes that occur in an area where no ecosystems previously existed. Such an area might be a new - PowerPoint PPT PresentationTRANSCRIPT
Ecological succession is a gradual andnatural change in an ecosystem overhundreds or thousands of years
Ecological Succession
Primary Succession
Primary Succession begins in an area without soil
Primary succession is theseries of changes that occurin an area where no ecosystemspreviously existed.
Such an area might be a new island formed by the eruption of an undersea volcano, or an area of rock uncovered by a melting sheet of ice.
Secondary Succession
Secondary succession takes place where an existing ecosystem has been disturbed.
Secondary succession is the series of changes that occurAfter a disturbance in an existing ecosystem.
Natural disturbances that have this effect include fires,Hurricanes, and tornadoes
Human activities, such as farming, logging, or miningMay also disturb an ecosystem
NicheAn organism’s particular role in an ecosystem
The Honey Bee’s niche is to pollinatePlants as it gathers nectar and pollen
Desert cottontails•Eat grasses and shrubs•Food source for coyotes, foxes, hawks, horned owls, eagles
Species
A group of similar organisms whose members can mate with one Another and produce fertile offspring
Fox Squirrel
White tailed deer
Adaptation
A characteristic (trait) that helps an organism Survive in its environment or reproduce
Wolf’s adaptations
Include sharp teeth,
Speed, and excellent
Hearing and eyesight
Population
Pine Trees
Duck
White Tailed Deer
A group of organisms of the same species livingIn the same area
Bluebonnet flowers
FloraAll species of plants that are found in a particular region, period, or special environment.
Fauna
The animals of a particular region, habitat, or geological period.
Pioneer Species
Spiral of lichen on a rock
Pioneer species are the first organisms to grow in a bare area (bare rock with little or no soil)
Mosses
Pioneer species are oftenLichens and mosses carried toThe area by wind or water
As these organisms grow, they helpbreak up the rocks.When they die, theyenrich the thin layer of soil that is forming.