Bachelor of Forestry Forest Ecosystem Flashcards
7 cards from real B.F. Bachelor of Forestry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Forestry Forest Ecosystem flashcards as text
Metapopulation theory is most applicable to forest wildlife species that:
Answer: Exist as spatially separated subpopulations connected by dispersal
Metapopulation dynamics describe subpopulations in fragmented habitat patches linked by occasional dispersal events.
Which process is responsible for the characteristic yellow and orange leaf colors in deciduous forests during autumn?
Answer: Unmasking of carotenoids as chlorophyll breaks down
Yellow and orange carotenoid pigments are present all season but become visible as green chlorophyll degrades in fall.
In forest succession, a climax community is best defined as:
Answer: A self-perpetuating community in equilibrium with site conditions
A climax community maintains itself through reproduction without further directional change under stable environmental conditions.
Which type of mutualism is exemplified by the relationship between alder trees (Alnus spp.) and Frankia bacteria?
Answer: Symbiotic nitrogen fixation
Frankia actinomycetes fix atmospheric nitrogen in alder root nodules, enriching soil nitrogen for surrounding plants.
The concept of 'ecosystem services' categorizes benefits forests provide. Which is an example of a regulating service?
Answer: Carbon sequestration and climate regulation
Regulating services include carbon sequestration, water purification, and flood control — processes that regulate environmental conditions.
A forester assessing old-growth characteristics would look for which structural feature as a key old-growth indicator?
Answer: Abundant coarse woody debris and multi-layered canopy
Old-growth forests are defined by structural complexity including large snags, CWD, pit-and-mound topography, and multi-aged canopies.
Which disturbance regime characteristic best explains why the boreal forest has a relatively simple species composition compared to tropical forests?
Answer: High frequency of stand-replacing fires and harsh climate limiting species establishment
Frequent severe fires combined with cold climate and short growing seasons limit the number of species adapted to boreal conditions.