Term
|
Definition
| local diversity within a habitat (sampled site at UC field station |
|
|
Term
|
Definition
diversity between habitats (comparison of sites within stream)
C / (α1 + α2)/2 , C= number shared |
|
|
Term
|
Definition
| overall diversity in a geographic region (Great Miami watershed) |
|
|
Term
| Organismic hypothesis, author: |
|
Definition
| (Clements 1916): Associations of species with interdependent biotic needs[superorganism] |
|
|
Term
| Individualistic hypothesis, author |
|
Definition
| (Gleason 1926): A community is composed of species with similar requirements; the particular biotic interactions not important |
|
|
Term
|
Definition
| A regular sequence of changes in community composition following a disturbance. |
|
|
Term
|
Definition
| begins on non-organic substrate (rock, volcanic ash, lava, water, sand) |
|
|
Term
|
Definition
| develops after community removed by DISTURBANCE ; soil already formed; 50-200 yrs |
|
|
Term
|
Definition
eats dead organisms or waste
+/0 |
|
|
Term
|
Definition
| are when the predator abundance increases in proportion to prey abundance increasing. |
|
|
Term
|
Definition
| are responses based on the predator being able to capture/handle prey (c) in response to prey abundance increasing. |
|
|
Term
|
Definition
pioneer species modify environment to increase competitive ability of later species
less suitable for themselves |
|
|
Term
|
Definition
first colonizer holds site from invasion
displaced only by death/damage from disturbance |
|
|
Term
|
Definition
any species begins process
those species tolerant of lower resource levels succeed or invade
shade-tolerant species unaffected by present residents |
|
|
Term
monoclimax
polyclimax
fire climax:
disclimax |
|
Definition
[Clements 1920s]: any region has only one climax type = climatic climax
[Tansley 1939]: various types of climax communities set by soil, topography, water, nutrients, and biotic interactions
frequent periodic fire holds at subclimax;
prairie, chaparral
alpine meadows?
activities of man holds at non-climax stage;
grazing, mowing |
|
|
Term
| highest diversity for succession? |
|
Definition
| Highest diversity for succession occurs when it is at intermediate disturbance levels. |
|
|
