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• Plant genotypes differ in nutritional qualities,
growth, defensive compounds, flowering
phenologies helcom.fi • More diverse patches: … More spatial and temporal
n iches for insects Zostera marina • Once insects find a patch ….
They may be more likely to stray and visit
o ther genotypes near by
11 -If you are a flower-feeding herbivore, being in a patch where there
a re t wo genotypes with different flowering schedules: you have the
o pportunity to feed first on Genotype 1 and then Genotype 2 • Marine sea grass
• Important habitat in estuaries
• Plays a key role in productivity of
shallow water marine ecosystems -Where rivers meet oceans
-Most productive ecosystems in the world
-Key role in lifecycle of fish, invertebrates etc
-There is a lot of habitat heterogeneity - MANY places to
h ide - thus supporting greater species diversity
-Food source for herbivores! 12 2 -White are control
-Black - polyculture
-Grey - monoculture
-Clipping: removing/lowering density of shoots (artificial disturb)
-Algal bloom: Natural disturbance
-How do mono and poly respond to these disturbances? 19/03/2013 Polycultures recover from severe disturbance faster Natural
(algal bloom) Monoculture
(clipping) Experimental disturbance
Hughes and Stachowicz, 2011, Journal of Ecology 99: 445 453 13 14
Hughes and Stachowicz, 2011, Journal of Ecology 99: 445 453 -Polyculture responds faster! Measuring weeks until these plots recovered
u ntil they recover back to pre-disturbance
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This document was uploaded on 01/27/2014.
- Winter '14
- Annotated Lecture S