small-scale ecosystem Flashcards

1
Q

where do sand dunes form

A

where there is a high tidal range exposing lots of sand, this dry sand is then blown inland

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2
Q

what are sand dunes used for

A

sea defenses and tourism

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3
Q

what is the first sand dune called

A

embryo dune

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4
Q

what is the second sand dune called

A

fore dune

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5
Q

what is the third sand dune called

A

yellow dune

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6
Q

what is the fourth sand dune called

A

grey dune

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7
Q

whats inbetween the grey dune and the mature dune

A

the dune stack

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8
Q

what is the last sand dune called

A

mature dune

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9
Q

feature of marram grass

A

has long tap roots

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10
Q

where does sea rocket grow

A

on the embryo dune

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11
Q

human impact on sand dunes

A
  • humans trampled on sand
  • killed the marram grass
  • destabalies the dune
    -the sand gets blown out
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12
Q

how can we prevent the human impact on sand dunes

A

create footpaths/boardwalks
fences
keep people off the dunes

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13
Q

describe the embryo dune

A

the youngest dune, nearest to the sea where sea rocket grows

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14
Q

describe the fore dune

A

older and slightly higher dune

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15
Q

describe the grey dune

A

found further inland, where conditions for plant growth improve

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16
Q

what happens when the marram grass dies

A

the bare sand is blown away beacause there is no roots from marram grass securing it

17
Q

what happens once the sand is blown away

A

it leaves large - semi circular hollows known as blow outs

18
Q
A