Lesson 10 - Estuaries And Saltmarshes

Question 1

Halocline

Answer 1

Salinity Gradient

Question 2

Isohaline

Answer 2

Line of uniform salinity

Question 3

Turbidity Maximum

Answer 3

Area where particles can be carried upstream and downstream repeatedly

Question 4

Positive vs Negative estuary

Answer 4

P - Freshwater dominates over sea water

Question 5

Stenohaline species live at what salinities?

Answer 5

Up to 30ppt

Question 6

Euryhaline

Answer 6

Marine Species that survive below 30ppt

Question 7

Brackish (2)

Answer 7

Estuarine species not found in the sea occur up to 30ppt. Optimum growth at 3-10

Question 8

Osmoconformers

Answer 8

Allow their body fluid to change with salinity

Question 9

Osmoregulators

Answer 9

Keep salt concentration constant by regulating the concentration of solutes in their body

Question 10

Which way does water go in saltwater bony fish gills?

Answer 10

Outwards

Question 11

Why are mudflats important?

Answer 11

May contribute more than 50% to estuary productivity

Question 12

What is the primary producer in Mudflats?

Answer 12

Diatoms

Question 13

What are the main groups of animals?

Answer 13

Epifauna and Infauna

Question 14

Epifauna

Answer 14

Live on sediment surface

Question 15

Infauna

Answer 15

Burrow in sediment for protection

Question 16

How do salt marshes cope? (2)

Answer 16

Glands to excrete salts, concentrate salt in roots

Question 17

Advantages of salt marsh? (2)

Answer 17

Actively reclaim land, protect from erosion