MB Seagrass meadows and mangroves.

Seagrass are angiosperms?

True

Which traits are especially helpful for fully submerged plants?

Hydrophilous pollination, lacunar system and leaves in sheaths.

seagrass are closely related to terrestrial grasses?

False

How does the presence of seagrasses result in physical protection of coastal habitats?

Their rhizome trap sediment creating barriers

Which factors migh limit seagrass growth?

Epiphyte overgrowth, nutrients, depth and light

Which reproduction traits do most seagrasses have?

There are dioecious and they release pollen into the water to fertilise female flowers.

Which are true for seagrass meadows derived from clonal propagation?

They can become very old (>1000 years) and they are vulnerable to disturbance.

which have a wider latitudinal distribution?

Seagrasses

in areas with high amounts of nitrogen, what would you expect to find?

Macroalgae

why did the eelgrass limpet Lottia alveus extinct?

They were unable to cope with the low salinities in tes estuaries.

Which of these removes the entire plant when they graze on seagrass?

Seacows.

Why is seagrass important in the fight against climate change?

It accounts for 10% of the oceans carbon storage capacity

How does seagrass affect biodiversity?

The biodiversity is higher due to the 3D structures created by the seagrass

Where can we find mangroves?

Shallow water and until a 20°C isotherm on either side of the equator

How many basic forms of mangroves are recognised?

3

What are the characteristic for riverine mangroves?

Low tidal range and large freshwater inflow

How do mangroves enable gas exchange in their roots?

A They have aerial roots and pneumatophores.
They have roots periodically breaking through the soil surface. They have lenticles situated above the sediment

Which area has the greatest biodiversity in mangroves?

Indo-West Pacific

Which of these best describe a pneumatophore?

It's an aerial root specialised for gaseous exchange

How do mangroves reproduce?

Wind pollination
Animal pollination
Viviparous propagules

Select all which are common in mangroves

Epiphytes
Insects
Reptiles
Amphibians
Birds
Sponges
Ascidians
Fish
Crustaceans

Norway has no genus of seagrass which grows on rocky shore

True