Intertidal And Rocky Shores 2
Intertidal and Rocky Shores
Group Members:
Nguyen Thuy Nhung
Huynh Thi Hoai Thuong
Truong Thi Thanh Da
Nguyen Thi Phuong Thao
Nguyen Manh Duc
Outline
Habitat in intertidal rocky
shores
Intertidal distribution pattern Species list
Adaptation of organisms
1. Habitat in intertidal rocky shores
The intertidal zone: the region between the high
tide mark and the low tide mark
Tides are periodic rises and falls of large bodies of water caused by the gravitational interaction between the Earth and the Moon
The tide comes in and out almost twice in 24 hours, leaving the higher reaches of the shore exposed for much longer than the lower areas.
Low tide on the rocky shores
High tide on the rocky shore 1. Habitat in intertidal rocky shores
An extreme habitat
+ Movement of the tides
→ change oxygenation, desiccation and temperature
→ food and nutrients arrive, wastes are washed away
+ Physical action of waves
- Create shear forces on the rocks and could potentially dislodge organisms.
1. Habitat in intertidal rocky shores
+ Exposure to air
- Is stressful to marine organisms
+ Temperature fluctuation
-May change 300C within an hour
- More intense radiation
+ Change in Salinity and level of oxygen + Species relationship
They compete for space and food
2. Intertidal distribution pattern
Different organisms able to withstand different degrees of
stress are found other areas
Upper limit: depends on physical environment.
Lower limits: are affected by interactions between organisms The greater the shore’s slope and the lesser the variation in the surface form of the rock
→ more delineation
Locations within rocky shore sites support greater numbers of one species than others
Vertical distribution Rock pool
3. Species List
Organisms must be able to tolerate the physical
stresses unique to this environment
Animal
Phylum
Example
Mollusca
Periwinkle, mussel, smooth limpet, Striped limpet,
Scaly limpet, Ribbed top shell, Chiton, Dog
Group Members:
Nguyen Thuy Nhung
Huynh Thi Hoai Thuong
Truong Thi Thanh Da
Nguyen Thi Phuong Thao
Nguyen Manh Duc
Outline
Habitat in intertidal rocky
shores
Intertidal distribution pattern Species list
Adaptation of organisms
1. Habitat in intertidal rocky shores
The intertidal zone: the region between the high
tide mark and the low tide mark
Tides are periodic rises and falls of large bodies of water caused by the gravitational interaction between the Earth and the Moon
The tide comes in and out almost twice in 24 hours, leaving the higher reaches of the shore exposed for much longer than the lower areas.
Low tide on the rocky shores
High tide on the rocky shore 1. Habitat in intertidal rocky shores
An extreme habitat
+ Movement of the tides
→ change oxygenation, desiccation and temperature
→ food and nutrients arrive, wastes are washed away
+ Physical action of waves
- Create shear forces on the rocks and could potentially dislodge organisms.
1. Habitat in intertidal rocky shores
+ Exposure to air
- Is stressful to marine organisms
+ Temperature fluctuation
-May change 300C within an hour
- More intense radiation
+ Change in Salinity and level of oxygen + Species relationship
They compete for space and food
2. Intertidal distribution pattern
Different organisms able to withstand different degrees of
stress are found other areas
Upper limit: depends on physical environment.
Lower limits: are affected by interactions between organisms The greater the shore’s slope and the lesser the variation in the surface form of the rock
→ more delineation
Locations within rocky shore sites support greater numbers of one species than others
Vertical distribution Rock pool
3. Species List
Organisms must be able to tolerate the physical
stresses unique to this environment
Animal
Phylum
Example
Mollusca
Periwinkle, mussel, smooth limpet, Striped limpet,
Scaly limpet, Ribbed top shell, Chiton, Dog