lecture 31 - terrestrial ecosystems: forests and grasslands Flashcards

1
Q

what can survive the dry season with an annual rainfall of 100-200mm

A

only grasses

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2
Q

what can survive the dry season with an annual rainfall of up to 300mm

A

shrubs

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3
Q

what can survive the dry season with an annual rainfall of up to 400mm

A

solitary trees

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4
Q

what can survive the dry season with an annual rainfall of over 400mm

A

dense trees

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5
Q

where are tropical rainforests located

A

nearest to equator with lots of rain

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6
Q

what are the types of tropical forests

A

rain, deciduous and dry

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7
Q

what type of environment is a tropical rainforest

A

low-stress low disturbance

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8
Q

what makes up a tropical rainforest

A

tall slender trees, more plants and animals than all other biomes combined

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9
Q

what are epiphytes

A

plants that live on trees no roots in the ground

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10
Q

what makes up a dry forest

A

thorny shrubs and tree succulents

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11
Q

what is rainforest soil like

A

rapid nutrient recycling nutrients not storedin the soil makes it susceptible to leaching as roots are not deep

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12
Q

where are tropical deciduous forests located

A

area with distinct wet and dry season

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13
Q

what makes up a deciduous forest

A

deciduous trees and shrubs

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14
Q

where are tropical dry forests located

A

lowland area with a prolonged dry season and scarce rainfall

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15
Q

what are the types of temperate and boreal forests

A

boreal forest climate, temperate forest , deciduous habit

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16
Q

where are temperate and boreal forests located

A

midlatitudes to artic circle

17
Q

features of temperate and boreal forests

A

seasonality period of dormancy

18
Q

seasons in boreal forest climate

A

long and cold winters
short and wet summers

19
Q

what are boreal forest climates made up of

A

conifer trees

20
Q

what is boreal forest climate soil like

A

thin, nutrient poor and acidic

21
Q

seasons in temperate forests

A

warm summer
cold winter

22
Q

what is rainfall like in temperate forests

A

relatively high throughout the year

23
Q

how long is the growth season in a temperate forest

A

6-9 months

24
Q

what is the soil like in a temperate forest

A

deep fertile with thick litter layer

25
what is a deciduous habit like
tree growth, litter producing good soil fertility
26
what is the rainfall like in a grassland
250-700mm per year
27
types of grassland
tropical, temperate
28
temperate grassland seasons
cold winters and long dry season
29
disturbances and stresses in temperate grasslands
grazing and fire
30
soil in temperate grassland
low rainfall means low leaching = fertile soil
31
what role do grasslands play in farming
conversion to tillage for corn and wheat crops
32
tropical grassland seasons
warm climate long dry season
33
tropical grassland stress and disturbances
regular fires and grazing
34
importance of disturbances in tropical grassland
nutrient cycling and preventing tree growth
35
the soil in tropical grassland
lower nutrient
36
plant adaptation to grazing
basal meristem, tillering, rhizomes, chemical compounds, spines