Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Vagility
|
Dispersal ability
|
|
|
Equilibrium Theory of Island Biodiversity
|
The larger an island is, and the closer it is to a source population, the higher the equilibrium number of species.
|
|
|
Dynamic equilibrium
|
S should attain equilibrium value over time, Immigration + Evolution = Extinction - Emigration.
|
|
|
Single large habitat
|
Large reserves needed to prevent edge effects.
|
|
|
Many small habitat
|
Several small reserves should protect richness.
|
|
|
Forest state
|
Large situation: shading, moisture, decomposers, soil, fungi, termites, soil evolution (expansion, weathering, retention).
|
|
|
Posture state
|
When too small: dessication, soil changes (compaction, infiltration, erosion, nutrient loss), river incision, water table drop, invasive weeds.
|
|
|
Latitudinal gradients in species diversity
|
Most taxa are diverse near the equator - we live in a hotspot, huge diversity of plants because of the diversity of kinds of soils, especially serpentines.
|
|
|
Integrated hypothesis
|
Communities are discrete groupings of particular species that are closely interdependent and nearly always occur together.
|
|
|
Individualistic hypothesis
|
Species are independently distributed along gradients and a community is simply the assemblage of species that occupy the same area because of similar biotic needs.
|
