ROCKY INTERTIDAL

22
ROCKY INTERTIDAL

description

ROCKY INTERTIDAL. RELATIVE TIDE LEVELS. RELATIVE TIDE LEVELS. -EFFECT OF SLOPE. MHWS. MHWN. ZONES CAN BE LESS THAN A METRE WIDE. MTL. ZONES CAN BE SEVERAL TENS OF METRES WIDE. MLWN. MLWS. RELATIVE TIDE LEVELS. -EFFECT OF SLOPE. Slope and Substrate. S Slope. Substrate Size. - PowerPoint PPT Presentation

Transcript of ROCKY INTERTIDAL

Page 1: ROCKY INTERTIDAL

ROCKY INTERTIDAL

Page 2: ROCKY INTERTIDAL

RELATIVE TIDE LEVELS

Page 3: ROCKY INTERTIDAL

RELATIVE TIDE LEVELS

-EFFECT OF SLOPE

MHWS

MHWN

MTL

MLWN

MLWS

ZONES CAN BE SEVERAL TENS OF METRESWIDE

ZONES CAN BE LESS THANA METRE WIDE

Page 4: ROCKY INTERTIDAL

RELATIVE TIDE LEVELS

-EFFECT OF SLOPE

Page 5: ROCKY INTERTIDAL

Slope and Substrate

SSlope

Substrate Size Wave Action

Page 6: ROCKY INTERTIDAL

Slope and Substrate

Steep slope

Strong wave action

Coarse substrate

Water drains at low tide

Gradual slope

Weak wave actionFine substrate

Water retained at low tide

Page 7: ROCKY INTERTIDAL

Slope and Substrate

Page 8: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

Page 9: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

a. Supralittoral Zone

Xanthoria

Page 10: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

b. Supralittoral Fringe

Calothrix

Verrucaria

Littorina

Page 11: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

b. Supralittoral Fringe

Bottom of zone

Fucus spiralis Semibalanus balanoides

Page 12: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

- begins at upper limit of barnacles

Page 13: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

4 dominant species

Semibalanusbalanoides-northern rock barnacle

Ascophyllum nodosum - knotted wrack

Page 14: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

4 dominant species

Mytilus edulis-blue mussel

Fucus vesiculosus- bladder wrack

Page 15: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

Other common species

Acmaea-limpet

Littorina littorea-periwinkle

Page 16: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

Other common species

Thais-whelk

Page 17: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

On stalks of Ascophyllum

Sertularia

Flustrellidra

Polysiphonia

Page 18: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

c. Midlittoral

Lower midlittoral

Porphyra

Palmaria

Page 19: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

d. Infralittoral

Laminaria- kelp

Page 20: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

d. Infralittoral

Strongylocentrotusdroebachiensis

Ulva

Page 21: ROCKY INTERTIDAL

Stephenson and Stephenson Classification of Rocky Intertidal Shores

d. Infralittoral

Asterias vulgaris

Page 22: ROCKY INTERTIDAL

Critical Tide Levels(Doty, 1946)