Lecture 2

Question 1

State of PH Forests

Answer 1

• 30 M ha total area
• 27 M ha covered with primary forests before WWII
• Today 0.8 M ha of primary forests remains
• Including secondary and tree plantations about 6 to 7M ha of present total forest cover about 20-25% of total area of Philippines
• High biodiversity value -13,000 species or 5% of world’s total

Question 2

our forest is already under stress from

Answer 2

1. land cover changer
2. land conversion
3. logging
4. habitat fragmentation
5. soil and water degradation
6. introduction of exotic species

Question 3

temp increase could lead to

Answer 3

1. shrinking or expansion of forest cover
2. migration to higher elevation
3. forest loss due to fires and pests

Question 4

Could alter forest ecosystems

Answer 4

1. Species distributions and population sizes
2. Timing of reproduction or migration events 3.Length of growing season
3. High altitude forest ecosystems most
   sensitive to changes in climate

Question 5

Climate change impacts on forests

Answer 5

alter the frequency and intensity of forest disturbances such as insect outbreaks, invasive species, wildfires, and storms.

These disturbances can reduce forest productivity and change the distribution of tree species.