Lecture 11-Impact of Climate Change on Plants

Question 1

what is senescence meaning

Answer 1

The process of growing old

Question 2

what are the impacts of climate change on plants

Answer 2

Species distribution/ extinction
Temperature effects on phenology and consequences
Drought-induced forest mortality
Impact of drought on crops
CO2 effects on photosynthesis, growth and yield
Interactions of CO2, temperature and precipitation

Question 3

what did Eunice Newton Foote (1819-1888) do

Answer 3

first to experiment on warming effects of
sunlight on different gases

Question 4

how many days difference is there from the First flowering dates 1753–1986 compared to 1987–2019

Answer 4

26 day difference

Question 5

what is vernalisation

Answer 5

the induction of a plant’s flowering process by exposure to the prolonged cold of winter, or by an artificial equivalent

Question 6

what are the effects of warmer winters and springs on phenology

Answer 6

frost damage of flowers and leaves due to false springs
pheonological mis-match
longer growing seasons
lack of sufficient vernalisation can result in incomplete flowering of plants
Earlier flowering and leafing due to warmer temperatures

Question 7

what are the expected impact of climate change on crop production in Ireland

Answer 7

Decrease in cereal crop yields (up to 9%)
Increase in forage maize yields (up to 97%)
Increase in grass yields (up to 56%)

Question 8

what are the effects of elevated CO2
and climate change on crop
production

Answer 8

Positive effects of elevated CO2 on crop production
(although not as large as initially estimated) Negative effect of rising temperature and changing
precipitation patterns
Overall predominantly negative in hot climates
Potentially positive effects in cool, moist
climates??