Download Ecosystem: Stability and Change

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Pleistocene Park wikipedia , lookup

Storage effect wikipedia , lookup

Unified neutral theory of biodiversity wikipedia , lookup

Island restoration wikipedia , lookup

Latitudinal gradients in species diversity wikipedia , lookup

Molecular ecology wikipedia , lookup

Introduced species wikipedia , lookup

Habitat conservation wikipedia , lookup

Biogeography wikipedia , lookup

Biological Dynamics of Forest Fragments Project wikipedia , lookup

Biodiversity action plan wikipedia , lookup

Bifrenaria wikipedia , lookup

Lake ecosystem wikipedia , lookup

Ecosystem services wikipedia , lookup

Ecological fitting wikipedia , lookup

Occupancy–abundance relationship wikipedia , lookup

Ecology wikipedia , lookup

Natural environment wikipedia , lookup

Restoration ecology wikipedia , lookup

Habitat wikipedia , lookup

Ecological resilience wikipedia , lookup

Theoretical ecology wikipedia , lookup

Ecosystem wikipedia , lookup

Ecological succession wikipedia , lookup

Ecosystem: Stability and Change
Is the ability to withstand or recover from
externally imposed changes or stress
• resistance, persistence, or inertia
• Resilience
• Constancy-maintain certain size
– Applies to organisms, populations, communities
ecosystems, and the ecosphere
– Provided that these external stresses are not too
Factors Contributing to Ecosystem
• Food Web Complexity
• Homeostatis- internal systems counteracting
external stress.
• Continuous Dynamic Change
Movement of Matter and Energy
Replacement of Organisms
Ecological Succession- the natural replacement of one
community in particular area with a different, and
usually more complex community, over a period of
Primary Succession
Secondary Succession
Secondary Succession
Tolerance Range/Limits
Minimum and maximum limits for physical
conditions (such as temperature) and
concentration of chemical substances beyond
which no members of a particular species can
Limiting Factor Principles
Too much or too little and any abiotic factor
can limit or prevent growth of a population of
a species in an ecosystem, even if all the other
factors are at or near the optimal range of
tolerance for the species
Law of Tolerance
The existence, abundance, and distribution of
a species in an ecosystem are determined by
whether the levels of one or more physical
and chemical factors fall with the range
tolerate by the species.