52.2 How Are
Climates Distributed on Earth? 1114
Solar energy drives global climates
1114
Global oceanic circulation is driven
by wind patterns 1115
Organisms must adapt to changes in
their environment 1115
52.3
What Is a Biome? 1116
Tundra is found at high latitudes
and in high mountains 1118
Evergreen trees dominate most boreal
forests 1119
Temperate deciduous forests change
with the seasons 1120
Temperate grasslands are widespread
1121
Cold deserts are high and dry 1122
Hot deserts form around 30° latitude
1123
The chaparral climate is dry and pleasant
1124
Thorn forests and tropical savannas
have similar climates 1125
Tropical deciduous forests occur in
hot lowlands 1126
Tropical evergreen forests are species-rich
1127
The distribution of biomes is not
determined solely by climate 1128
52.4 What
Is a Biogeographic Region? 1128
Three scientific advances changed
the field of biogeography 1129
A single barrier may split the ranges
of many species 1133
Biotic interchange follows fusion
of land masses 1134
Both vicariance and dispersal influence
most biogeographic patterns 1135
52.5 How
Is Life Distributed in Aquatic Environments?
1135
Currents create biogeographic regions
in the oceans 1135
Freshwater environments may be rich
in species 1136
