11

Question 1

Established population?

Answer 1

Stable or positive population growth rate and maintains population without new colonists.

Question 2

!!!!Transients or colonists?

Answer 2

Disperse in and can live on Surtsey, but no sustained population growth. Negative growth or blow minimum viable population size.

Question 3

A hypothesis of a plateau in species diversity?

Answer 3

Since constraints of regional species pool might be because all of the species that have a high probability of dispersing to islands off the mainland have already arrived.

Question 4

Superorganism and the organismic view? 5•

Answer 4

Communities that are well integrated with populations that are tightly bound together now and in their evolutionary history.

•They have sharp boundaries between communities
•species repeat in space and time (predictable)
•they are tight and inter-dependency amount species
•positive or neutral interactions between species
•emergent properties.

Question 5

Continuum view of communities? 5•

Answer 5

Species within a community coexist because they share or have overlapping abiotic requirements and tolerances.

•Species respond individually
•Boundaries are not sharp
•current communities are temporary
•species may be added, removed, or replaced without devastating whole communities
•interactions among species may be low

Question 6

Modern community perspective? 5•

Answer 6

•species are distributed individualistically
•community composition changes gradually across gradients
•emergent properties can be important (even without accepting clement’s organismic view)
•Abrupt changes tend to be associated with abrupt changes in the environment
•still debate about the relative importance of chance events versus abiotic & biotic processes in determining community structure.

Question 7

Succession is driven by many mechanisms? 3•

Answer 7

•facilitation model: early species modify the environment in ways that benefit later species. The sequence of species facilitations leads to a climax community
•tolerance model: assumes early species modify the environment in neutral ways that neither benefit nor inhibit later species
•inhibition model: assumes early species modify conditions in negative ways that hinder later successional species.

Question 8

Emergent properties?

Answer 8

Community level differences.