Symbiosis Flashcards
what is the significance of symbiosis?
generation of novelty origin of eukaryotes nutrition immunity colonization of land by plants coevolution
what does phylogenetic diversity in primates correlate with?
parasitie number
why is biodiversity not a static quantity?
different types
- environmental - climate, habitat, light
- biotic - symbiosis, comp, disease
- genetic - mutations, populations
what is symbiosis and what are the different types?
persistent relatioship between two or more unlike organisms interaction type function - defence, dispersal location- intra/extra partner range
what is specificity?
the taxonomic range of compatible or associated partners of a symbiont or its host
whats a good hypothesis for antagonistic interactions?
red queen
what do myco-heterotrophic plants show us?
rely on mycorrhizal connections for c-sourse
host specific
naturalistic sybiosis - persuasive strategy in diverse organisms
what is mutualism good for?
costs are implied as conflicts of interest, remain mutually beneficial and evolutionary stable
what is long term evo stability?
evo of mushrooms - looks evolutionarily labile and dynamic but need to look at scales as this over millenia
how is stability maintained?
sanctioning - sanctions imposed
yucca moths abort if too many eggs in fruit
rhizobia - if not enough fixed N2 the plant limits carbohydrate transfer
- likely mycorrhizae the same
what does geographic variation show?
host plant specialsation - single pop does something different - in individual pops preferences may have evolved away from the norm
population - level differences for ovi-position preference
host plant choice constrained but dynamic among pops
what does the geographic mosaic of coevolution show?
strength of gene flow and pressures interacting species have on one another has important consequences for evolution of biodiversity as a whole
whats ecollogical specialisation?
respond to community more than geographical range
what do we need to identify population structure?
frequency differences
what do zooxs show us?
different corals have different algae - light - depth - temp
niche partitioning - closely related symbionts are ecologically distinct and fufill own niche
