intertidal systems

Question 1

what are some intertidal conditions ?

Answer 1

mixed ocean and terrestrial systems. very strong vertical zonation in ecological communities

Question 2

intertidal ecosystems consist of ….

Answer 2

mud(salt marshes and mangroves), sand(beaches), and rock (rocky intertidal)

Question 3

• Protected from waves (“low energy”)
• Shallow slope / muddy sediments

Answer 3

characteristics of salt marshes and mangrove forests

Question 4

is the Air temp < 0°C over course of year in salt marshes and mangroves ?

Answer 4

Yes → Salt Marsh
No → Mangrove Forest

Question 5

what are some ecosystem characteristics of salt marshes and mangroves

Answer 5

Terrestrial (salt-tolerant) plant dominates
* Vertical zonation
* Hybrid Marine/Terrestrial Ecosystems

Question 6

most extensive marshes are found in…..

Answer 6

south eastern US . around 60%

Question 7

explain the optimal setting for
Marsh Development

Answer 7

Bare sand or mud flat -> increase in spartina presence ->increase in other spartina grasses-> add in terrestrial and oceanic organisms

Question 8

the presence of spartina grass causes

Answer 8

Reduced erosion due to roots
Increased sediment deposition as stems baffle water
flow
Input of organic matter (dead Spartina) to sediment
increase height of the marsh

Question 9

H 2 S toxicity
* High Salt (/ Water Balance)
* Low O 2
->Low Plant diversity

Answer 9

physical challenges for terrestrial plants

Question 10

what’s the meaning of dessication

Answer 10

getting overly dry

Question 11

what drives vertical zonation?

Answer 11

Tolerance to Physical Stress
Biological Interactions