Lecture 11

Question 1

state and transition models of succession!

Answer 1

structure, functioning and composition of final plant community may be unique and not representative of pre disturance community. The opposite is also possible.

Question 2

ecological integrity:

Answer 2

means respecting the land for not only for what it provides for us but for it in a more holistic way. For appreciating it for what it is. Or appreciting a key component of it.

Question 3

ecosystems have integrity when they have theur what intact?

Answer 3

native components.

Question 4

what are the consequences to the human acitivty of introduction of novelpatches and dynamics:

Answer 4

we change species that can live there! We have shifted which species are adapted to those environments like weedy species.

Question 5

How have we re-scaled fires?

Answer 5

typically fire would come across the landscape, and in the way we re-scaled that is that we suppressed those fires! insteas of having more less intense fires, we get few high intensity fires. This will change what species are present.

Question 6

what are the three steps in ecological restoration, applying theories of successiong:

Answer 6

1. design disturbances to create or eliminate sites fororganisms. 2. control colonization to increase or decrease organisms 3. control species performance.

Question 7

what is tillman model?

Answer 7

resource ratio model

Question 8

what is connel and slavter model?

Answer 8

facilitations, inhibition and tolerance models

Question 9

what is an example of endogenous disturance? what does it mean?

Answer 9

internal to the system and a tree falling!

Question 10

ecological restoration:

Answer 10

attempt to artificially overcome factors that are believed to limit ecosystem development (succssion). Controlling and directing succession

Question 11

what is an example of an exogenous distruabnce and what does it mean?

Answer 11

external to the system and fire, flood, climate, herbivores! This is what most disturbances we are talking about.

Question 12

what is drury and nisbets model?

Answer 12

changing resource availability model of succession

Question 13

what is egler model?

Answer 13

relay floristics and initial floristics models

Question 14

what are some reasons why to apply the natural avriability paradigm:

Answer 14

1. provides greater understanding of processes that drive ecological systems
2. allows evaluation of causes of ecological change and predicting consequences of management actions.
3. used to set goals that guide direction but not the detail of what desired conditions or outcomes might be.
4. other managng techniques might reduce variability
5. uses the space and time model

Question 15

how does disutbrnace respond to landscape respond to landscape patterns?

Answer 15

responds to corridors like roads and streams and what type of vegetation is there.

Question 16

what does native components include?

Answer 16

1. abiotic cmponents 2. biodiversity (landscape and species) 3. ecosystem processes

Question 17

what is the consequence of rescaleing bounded regions?

Answer 17

redefine from eqilibrsting to non equilibriating state. We essentially dissected the landscape into smaller pieces These smaller pieces are no longer big enough to allow those disturbances that would normally happen on the landsape. Your sistem is no longer in equilibrium!

Question 18

how is ecological restoration done?

Answer 18

we design disturbances!