vegetation

Question 1

what are the direct consequences of climate change on vegetation

Answer 1

climate change has direct consequences for vegetation, some of which have already been observed, with others projected to occur as the impacts of climate change on nature environment

Question 2

explain warming temperatures and vegetation

Answer 2

warming temperatures may shift the ecological boundaries of some tree species. climate more then any other factor, controls the distribution of plant species and vegetation types

Question 3

what is estimated to occur

Answer 3

it is estimated that 80% of plant species will shift their range towards the poles or to higher altitudes where temperatures are cooler

Question 4

give an example of a plant that is moving to warmer conditions

Answer 4

the paper Birch tree of the USA has already begun to migrate northwards towards Canada

Question 5

will some plant species be at risk from this increase in temperature

Answer 5

some species will be at risk locally or regionally if conditions in their current geographic ranges are no longer suitable

Question 6

what will warmer temperatures cause to plants

Answer 6

warmer temperatures also place plants under significant stress, making them more vulnerable to pest attacks and disease outbreaks.

Question 7

with warmer temperatures what else is also needed

Answer 7

with longer, warmer growing seasons, plants need more water to survive. scientists are already seeing evidence that plants in the Northern Hemisphere show their growth in the summer because of warm temperatures and water shortages

Question 8

what are water stressed plants more susceptible to

Answer 8

fire, insect attacks and disease

Question 9

has pine and spruce beetle activity increased and why

Answer 9

has increased due to a lack of cold temperatures in North America forests, resulting in more tree deaths and damage

Question 10

positives of increased temperature

Answer 10

increased temperature and humidity have extended the growing season of some vegetation, leading to a net increase in greenery on earths surface, also allowing more types of vegetation to thrive further north. 640km north,a dramatic shift in such a short time

plants have taken up approximately 25% of the CO2 that humans have put into the atmosphere since 1960

CO2 fertilization increases plant growth until they reach a limit in the amount of water or nitrogen available

CO2 fertilization us responsible fr 70% of the earths greening effect, especially in dry areas like the Sahel region in Africa

Question 11

negatives of increased temperatures

Answer 11

with warmer temperatures and reduced rainfall, high intensity wildfires and becoming more frequent and severe in many regions, adversely affecting vegetation

droughts are expected to become more frequent and severe in some regions, while the number of extreme fire weather days is projected to increase

high intensity fires can lead to permanent loss of forest cover, especially in forests that are not fire adapted