Atmospheric N deposition in world biodiversity hotspots - G.Phoenix

Question 1

what does increasing N deposition do to plant diversity?

Answer 1

decreases it

Question 2

how many world biodiversity hotspots and what % of worlds floristic diversity is here?

Answer 2

34

50%

Question 3

how much greater is the N deposition rate compared to 1990s?

Answer 3

50%

Question 4

how many fo the hotspots will have a greater N deposition in 2050?

Answer 4

33/34

Question 5

how many hotspots receive over 15 kgNha-1yr-1?

Answer 5

17

Question 6

how many hotspots receive over 20 kgNha-1yr-1?

Answer 6

4

Question 7

what may elevated N deposition in high plant diversity areas do?

Answer 7

increase N deposition threat to floristic diversity

Question 8

how much greater are N emissions from human activities than before revolution?

Answer 8

4fold greater

Question 9

what is key for determining plant community composition?

Answer 9

nutrient availability

Question 10

what is N deposition a big driver of?

Answer 10

biodiversity loss

Question 11

what has lead to an increases in N emissions?

Answer 11

increased pop growth and rapid industrialisation

Question 12

what % of earths terrestrial area is hotspots?

Answer 12

2.1-2.3%

Question 13

what are the main error sources of the chemistry transport model?

Answer 13

emissions, inventories, atmospheric transport, remove, chemical transformations

Question 14

what is the average N deposition rate to biodiversity hotspots and how much greater than the world as a whole is this?

Answer 14

5.3kgha-1yr-1

50%

Question 15

by 2050 what is the average N deposition likely to rise to?

Answer 15

11.8 kgha-1yr-1

Question 16

how many hotspots was N deposition high in in 1990s?

how many could it be by 2050?

Answer 16

7

22

Question 17

what may also pose a threat to biodiversity?

Answer 17

air pollution

Question 18

what does decreased plant diversity die to elevated N availability favour?

Answer 18

nitrophilous species and soil acidification

Question 19

what may leaching lead to?

Answer 19

more N in freshwater and coastal ecosystems so more eutrophication

Question 20

what did the study do overall?

Answer 20

identified areas with the greatest floristic diversity and N deposition and the extent of distribution.
Found it was clear that areas with high global floristic diversity will receive the most N deposition in the future at damaging rates