epibiosis

Question 1

what is an epibiont? what is an basibiont?

Answer 1

basibiont = ≈host of the epibiont –> living underneath

epibiont lives on top

Question 2

do epibiont and basibiont depend on each otheR?

Answer 2

no or facultative

Question 3

do the epibiont directly effects the basibiont?

Answer 3

no

harmless to th basibiont

Question 4

is epibiosis more specific or general

Answer 4

general

exception epibacteria

Question 5

what are indirect cpnsequences for basibionts ?

positive and negative

Answer 5

positve:
- camouflage
- associatonal resistence

negative:
- impact on mobility, shell stability etc.
- Insulation (light, nutrients, gas exchange etc.)
- shared doom (verhängnis)

Question 6

consequences for epibionts

Answer 6

positive:
- substratum
- elevation over boundary layer
- nutritional benefit
- associational resistance

negative:
- limited life of subtratum
- habitat change
- physiological processes

Question 7

give and example for epibiois and name the consequences of this relationship for the basibiont

Answer 7

(periwinkles and barnacles)

–>
seagrass and filamentous algae

negative:
- competition for light and nutreints
- attract mussel
- increased drag and weight

postive:
+protection from Uv-radiation
+ deflect graing pressure

Question 8

what are variations in the pibiont community?

Answer 8

• age
• male vs. female
• microhabitats on a body
• seasonal vs. annual
• surrounding habitat
• basibiont health

Question 9

defence mechanisms against epibionts are mixtures of what?

Answer 9

• behavioural
• mechanical
• chemical
• physical

-strategies

Question 10

name 2 behavioural defence strategies

Answer 10

burrowing
intertidal exposure
grazing &mucus secretion

Question 11

name 2 mechanical defence strategies

Answer 11

mucus secretion
surface structure
friction (reibung)

Question 12

name 2 chemical defence strategies

Answer 12

difficult to identify betw. metabolic by prodcuts vs. dedicated excretion:

• mucus (dolphin, coral, echinoderms)
• terpenoid (red algae)
• triterpene glycosides (sponges)

Question 13

how does chemical defence affect the epibiont?

Answer 13

affects settlement and post-settlement

Question 14

how does physcial defence affect the epibiont?

Answer 14

1. ) reduced attachemnet strength

2. ) reduced settlement area (microtopography)

Question 15

what is “sharklet AF technology” ?

Answer 15

=antifouling technology, that inihibts biofouling through pattern alone.