Forest Ecology Flashcards

1
Q

Shade tolerance

A

– ability to establish and grow in shade.

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2
Q

Upper tree layer

A

Canopy

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3
Q

Shrub/herb layer

A

understory

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4
Q

forest floor layer

A

forest floor

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5
Q

Local differences in forest types influenced by

A

Precipitation temperature
elevation

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6
Q

what can dense canopies do?

A

eliminate understory

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7
Q

Keeps some shade on the site at all times – what does it promote

A

Partial Harvest Forestry
tends to promote regeneration of shade tolerant trees

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8
Q

what does canopy affect?

A

watershed
-through transpiration and interception
-cleans water

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9
Q

Transpiration

A

water evaporating from the leaves

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10
Q

Interception

A

water held in the canopy of trees

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11
Q

The forest floor intercepts precipitation, acts as

A

as a thermal barrier, controls nutrient cycling,
physical barrier preventing erosion.

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12
Q

Feather moss and forest floor also intercept snow and rain - acts like

A

a sponge

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13
Q

Forests usually have a closed C cycle over millennia, explain this

A

-C uptake, storage = release back the
atmosphere over the longterm
-Forest fires, insects, disease can speed the cycle of C back to the atmosphere
-Solid Wood products take C out of the loop: 1 to 500 years-

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14
Q

how much carbon do Forest floor and deeper soil store

A

as much or more C than in the trees

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15
Q

how many trees do you need to store C

A

2 billion

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16
Q

Forests are source of clean stream water but

A

reduce the total flow