Short answer questions Flashcards

1
Q
  1. Which of the ‘big five’ mass extinctions resulted in 2nd level ecological disruptions without significantly effecting reef ecosystems?
A

End-Ordovician

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2
Q
  1. On what scale do alpha, beta, and gamma diversity differ?
A

Alpha: Within habitat diversity
Beta: Species competition
Gamma: landscape= OCEAN

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3
Q

In which geological period appear the first representatives of the modern Evolutionary Fauna?

A

Cambrian

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4
Q

How did the diversity of the Paleozoic Evolutionary Fauna develop during the Mesozoic?

A

Stenotopic organisums

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5
Q

What is described as the Signor Lipps effect?

A

The first and last appearance of a taxon is never truly known

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6
Q

Define the tern convergent evolution?

A

Organisms that are not closely related develop similar characteristics due to environmental control.

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7
Q

Name two characteristics of K-strategists

A

Large body
slow to mature
few off spring
Low juvenile mortality

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8
Q

Name two characteristics of R-stratagists

A

fast to mature

High infant mortality

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9
Q

The base of which geological period is defined by the first appearance of an ichnospeceis?

A

Base of the Cambrian period

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10
Q

If burrow A cross cuts Burrow B, which burrow formed in a shallower tier?

A

B

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11
Q

What happens to burrow size as oxygen levels in the marine environment decrease?

A

Decreases in size

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12
Q

What is the name given to the study of fossil communities?

A

palaeosynecology

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13
Q

what term is used to describe the sedimentary rock fabric caused by the activities of burrowing organisms?

A

Bioturbation

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14
Q

Give two example of trace fossils that are underground miners?

A

diplocraterion and rhizocordium

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15
Q

Which inchnofacies indicates quiet, deep, muddy enviroments and is dominated by pascichnia and agrichnia ?

A

Nereites (off shore/ deep)

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16
Q

Which ichnofacies indicates mobile, sandy substrates and is dominated by vertical domichnia?

A

skolithos (shore face)

17
Q

what term is given to fossil taxa that temporarily disappear from the rock record?

A

Lazarus taxon

18
Q

Which large igneous province is associated with the late Triassic mass extinction event?

A

Central Atlantic magmatic province

19
Q

name an important use of micro fossils in geology?

A

dating(biostratighraphy)

20
Q

Give an example of a method used in the preparation of sediment samples for micro fossil analysis?

A

Dying, washing, chemical extraction and thin section analysis.

21
Q

name a micro fossil groups with a clacareous shell?

A

foraminifera

22
Q

name a micro fossil groups with a clacareous shell?

A

foraminifera

23
Q

name a micro fossil groups with a siliceous shell?

A

Siliceoflagellate

24
Q

name a micro fossil groups with a organic-walled shell?

A

Dinoflagelattes

25
Q

the life cycle of foraminfera is charicterised by an alteration between two generations once that reproduces sexually and one that reproduces asexually

A

gamont and agamont

26
Q

Sub order of foraminifera that have perforate, hyaline calcareous walls?

A

Rotalinia

27
Q

sub order of foraminifera with imperforate, porcelaneous clacareous walls.

A

milionlina

28
Q

sub order of foraminfera with particles to make their tesst and cement the with either organic matter or clacaraous cements?

A

textulinia

29
Q

name for the the arrangement of chambers in a coiled helical spire?

A

trochspiral

30
Q

abioti environmental factor that controls distribution and abundance

A

Temperature

31
Q

biotic environmental factor that controls distribution and abundance

A

food

32
Q

stain used in for telling living and dead specimens apart

A

rose-bengal

33
Q

three wall structure names that used in ternary diagrams used to differentiate particular shallow water enviroments?

A

hyaline
Porcelaneous
agglutinated

34
Q

name of diversity index for benthic foraminifera?

A

fisher alpha index

35
Q

name for large foraminifera

A

nummulite zenehesis

36
Q

name and genus of benthic foraminifera that is typical of lagoon enviroments

A

quincoequelina