Lec5 Flashcards
macroalgae associated to Sea grass beds:
➢ …. species belong to green algae
➢ …. species belong to brown algae
➢ …. species belong to red algae
➢ 13 species belong to green
➢ 8 species belong to brown algae
➢ 25 species belong to red algae
occur In offshore deeper areas of the Western Arabian Gulf beyond the influence of wave action.
Muddy substrates
occur as patches along the Saudi Coast of the Arabian Gulf. the subtidal rocks provide suitable substrata and physical conditions to support coral attachment
Shallow subtidal rocks
Bird use rocky shore habitats for breeding and feeding purposes.
Herons
They have nutrient transport systems.
Sea grass
The western Arabian Gulf has vast areas with shallow water less than …. m depth suitable for Sea grass growth
15 m
Microalgae require much higher light levels to grow than Sea grasses do.
T/F
F, sea grasses higher than microalgae
feed directly on the Seagrass
- urchins
- fish
- green turtles
- dugong
feed directly on the Seagrass
- urchins
- fish
- green turtles
- dugong
In clear water, sea grasses reach depths of up to ,,,, m
17 m
In very turbid waters sea grass beds may only reach depths of ,,,,,, m
5-8 m
can be toxic to seagrasses at concentrations > 1 m
Sulfide in sediments
are considered to be one of the most highly threatened
marine habitats along with coral reefs, mangroves and salt marshes Globally
Seagrass
including burrowers and tube dwellers, and animals creeping or crawling at the sediment water interface
Infaunal species of fauna
living freely under & over the leaf canopy such as fishes
Mobile species of fauna
Living on leaves, mobile creeping & walking epifauna (e.g., gastropods) and swimming epifauna (e.g., caridean shrimp)
Epifaunal species of fauna
Arabian Gulf sea grasses are subject to extreme salinity fluctuations ranging from …….. psu .
38-70 psu
most widely distributed species of sea grass
Halodule uninervis
Less common species of sea grass
Halophila stipulacea
Rarely forming species of sea grass
Halophila ovalis
grow whether mixed with algae or not, also grow in sheltered sandy pockets among coral reefs.
Sea grass
Are flowering monocotyledon plant species that live in coastal and estuarine areas of the world.
Sea grasses
