ENANTIOSTASIS AND ESTUARINE ORGANISMS 9.2.3.2.8 AND 9.2.3.3.6

Question 1

where freshwater meets saltwater = fluctuations of salt and water concentrations on a daily basis

Answer 1

estuary

Question 2

enantiostasis is a survival tool of estuaries, how ?

Answer 2

have evolved adaptions that allow them to cope, they either avoid or tolerate these fluctuations

Question 3

seawater flows in, environment now has higher salt concentration

Answer 3

high tide

Question 4

seawater flows out at river mouth and freshwater flows into estuary, solute concentration higher

Answer 4

low tide

Question 5

challenge of organisms living in this environment

Answer 5

osmoregualtion as need to maintain metabolic functioning with surrounding factors

Question 6

name the 2 forms of enantiostasis organisms

Answer 6

1. osmoconformers

2. osmoregulators

Question 7

name that enantiostatsis organism

• avoids changes
• has ability to keep the solutes at an optimal level by trying to exclude

Answer 7

osmoregulator

Question 8

name that enantiostatsis organism

• tolerates changes in environement
• alters internal concentrations to match the external environment

Answer 8

osmoconformer

Question 9

exclusion, excretion, accumulation are the three mechanisms of ?

Answer 9

of plants controlling levels of salt (in environment=estuary)

Question 10

example of exclusion

Answer 10

don’t let salt into roots, grey mangrove

Question 11

example of excretion

Answer 11

salt glands on leaves, river mangrove

Question 12

leaves shed, milky mangrove

Answer 12

accumulation

Question 13

halophytes are ? example

Answer 13

plants adapted to saline environement, mangroves