{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

#10 - Metapopulations - Types of dispersal Metapopulations...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Metapopulations Population substructure and the movement of individuals (and alleles) among subgroups Types of dispersal • Passive – No selection of direction or distance – No “searching” for a particular site – Some organisms have special mechanisms for involving other species in their dispersal plants with sticky or spiny or fruit-enclosed seeds • parasites freshwater clams (glochidia larvae live on fish briefly) • Active – Usually some kind of searching behavior Passive dispersal What adaptations might be favored if you passively disperse your “propagules”? How might passive dispersal affect your biology...life history? – spacing – growth form – genetics Dispersal of seeds with distance in six tree species (Fig. 6.2a)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Patterns of dispersion Environments are “patchy” “Patchy” is in the eye of the beholder! • Fragmented Interrupted (or discontinuous) • Heterogeneous • Mixed • Diverse Broken up How might these different ways of saying “patchy” mean different things ecologically?
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}