Lecture Three - Concept of Community Flashcards
What are the problems with the Tintwistle Bypass?
It would pass through valuable ecological habitat.
What are JNCC?
- Nature Advisors
- Produce classification guides, e.g. National Vegetation Classification
What is the National Vegetation Classification?
- Assigns vegetation to a community
- Based on phytosociology (the plants that are living together)
- Gives descriptions of communities
What is W11?
- Woodland 11
- Oak-birch-wood sorrel woodland
What is W12?
- Woodland 12
- Beech-dog’s mercury woodland
- Contains species characteristic of base-rich soils.
What is the role of a Phase 1 Habitat Survey?
Assigns areas to habitat sites.
What is W19?
- Woodland 19
- Ash-Rowan-Dog’s mercury woodland
Name the unit given to describe association.
Braun-Blanquet’s unit
How are associations grouped?
In higher or lower taxa:
- Alliances
- Orders
- Subassociations
What did Karl Möbius study?
Studied oyster banks to determine their potential for commercial exploitation.
What is a biocönose?
A social community
What did Karl Möbius conclude/discover?
That each oyster bed is a biocönose (social community)
What did Frederick Clements study?
- The development of vegetation / plant succession / climax community
What is Physiognomy?
Outward appearance
What did Frederick Clements say that the cause of stabilisation in plant succession is?
Dominance
Give a experimental method of measuring the magnitude of interactions.
Through
- Target, e.g. Arabidopsis
- Interactor, e.g. Garden slug
Add interactor to population that didn’t have the interactor to start with, and measure the change in target abundance.
Give the equation used for measuring interaction strength.
[ ( E - C ) / C ] x 1 / d
E = abundance of target species in experimental plot C = abundance of target species in control plot d = abundance of the 'interactor'
Describe Robert Paine’s experiment.
- Grazer enclosures made by rings of Poxy Putty painted with copper-based paint.
- to estimate interaction strengths
