Larval Ecology Flashcards

1
Q

What is the most important aspect of population abundance?

A

Recruitment influences spatial & temporal variation in organism density

Variation in recruitment can alter ecosystem function

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2
Q

What does the general survivorship curve for larvae look like and why is high survival in larvae so significant?

A

Small changes in larval survival can have big impact in adult abundance

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3
Q

What are the pros and cons of larval dispersal?

A

Positive

- genetic exchange

  • colonisation
  • prevent extinction
  • redce intraspecific competition

Negative

-high mortality

-interspecific competition

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4
Q

Name the Reproductive Strategies of Larvae

A

Planktotrophic

  • Cheep to produce
  • High mortality
  • Dispersal

Lecithotrophic (yolk sack)

  • Reduced mortality
  • Reduced time in the water column
  • More limited dispersal

Non-pelagic

-no larval dispersal

-low mortality

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5
Q

What factors influence recruitment?

A
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6
Q

How did upwelling influence the recruitment of barnacles in Monte Ray?

How were they not transported offshore even though their mobility is limited?

A

Upwelling events with increased winds triggered larval dispersal

They used their ability to migrate vertically to get looped around by offshore current and upwelling

Similar for estuarian craps and some fish larvae

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