Biosphere

Question 1

overview

Answer 1

Defined as the total sum of all living matter

5 main stores of carbon in terrestrial biosphere

Question 2

Living vegetation

Answer 2

19% of carbon in the earth’s biosphere is stored in plants

Much of this is stored directly in the tissues
The root system also holds carbon

Question 3

Plant litter

Answer 3

Defined as fresh, undecomposed and easily recognisable plant debris

EG, leaves, cones, needles, seeds

Leaf tissues account for about 70% of litter in forests

Question 4

soil humus

Answer 4

Originates from litter decomposition

Thick brown or black substance after most organic litter has decomposed

Dispersed throughout soil by organisms such as earthworms

Question 4

soil humus

Answer 4

Originates from litter decomposition

Thick brown or black substance after most organic litter has decomposed

Dispersed throughout soil by organisms such as earthworms

Question 5

Peat

Answer 5

Accumulation of partially decayed vegetation or organic matter

Forms in wetland conditions, where permanent water saturation obstructs flow of oxygen

Creates low oxygen anaerobic conditions that slow down rates of plant litter decomposition

Question 6

Animals

Answer 6

Play a small role

Very important in generation of movement of carbon