Lecture 3 Flashcards

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1
Q

phytoplankton are broken up into two categories

?

A

diatoms

dinoflagellates

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2
Q

dinoflagellates

A

single cell
lack silica shell
cannot swim
can be very toxic

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3
Q

diatoms

A

hard shell

can swim

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4
Q

Phytoplankton blooms

A

winter spring and summer

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5
Q

benthos?

A

two major groups: suspension feeders and deposit feeders
Unconsumed material settles to
bottom to bottom dwellers

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6
Q

what happens to nutrients as phytoplankton increases

A

it decreases

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7
Q

more chlorophyll means

A

more phytoplankton

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8
Q

zooplankton include

A

copepods-antennas able to detect motion

protozoans-cilia that move food into their mouth

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9
Q

oysters are ___feeders

A

suspension

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10
Q

deposit feeders are important because?

A

they recycle the organic material and nutrients are brought back up to the surface
they stir the sediment

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11
Q

Phytoplankton fueled?

A

by dissolved nutrients

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12
Q

Phytoplankton eaten partially

A

by zooplankton

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13
Q

Why salt marshes

A
  1. Supports lots of marine organisms
  2. Protects shoreline against storm surge
  3. Interacts to support bivalve beds such as oyster beds
  4. Major environment on Long Island
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14
Q

Salt marshes are ___

A

accretionary environments

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15
Q

Marsh spartina plants are spread by means

of a

A

rhizome system

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16
Q

Sediment is often

A

anoxic

17
Q

allows Spar>na to exchange

gases, even when surrounded by anoxic soil

A

Aerenchyma tissue

18
Q

Older, mature salt marshes consist of

A

meadows with interspersed creeks

19
Q

interspersed creeks

A

have high nutrient input

20
Q

From low to high intertidal one finds

A

S. alterniflora, S. patens,…

21
Q

Spartina alterniflora are more___

A

salt tolerant than high intertidal forms

22
Q

S.A limits?

A

competition between spartina patent

23
Q

spartina patent limits?

A

physiological

24
Q

why is grazing slight on spartina?

A

tough leaves rich in cellulose

25
Q

what causes salt marshes to be flat ?

A

rising sea levels