Lecture 3

Question 1

Biolimiting nutrients definition, examples, profile

Answer 1

Nutrients that limit the growth of organisms
N P Si Fe
totally depleted at surface
+ Diagram

Question 2

Bio-intermediate nutrients definition, examples, profile

Answer 2

Ba Ca Ra C
partially depleted at surface water
+ diagram

Question 3

Bio-inert nutrients definition, profile

Answer 3

no vertical gradient due as no influence on biological processes

Question 4

Bio-unlimited nutrients

Answer 4

B Br Cs Cl F Mg K Rb Na Sr S

Question 5

Elements in Seawater

Answer 5

Cl- Na+ SO42- Mg2+ Ca2+ K-

= account for 99% of all dissolved components

Question 6

Redfield ratio

Answer 6

N/P = 16:1

Question 7

Forchammers principle

Answer 7

principle of constant proportions

Question 8

Measure salinity using

Answer 8

conductivity

Question 9

Origins of Elements (input and removal)

Answer 9

Weathering of continental rocks by chemical and physical processes.
Natural acid rain slowly dissolves rocks into elemental constituents then transport them by rivers to oceans where they accumulate.
Removal = sink as sediment and uplifts as rock

Question 10

Salinity Distribution

Answer 10

High @ 30 lat due to evapouration