- Page 1
- Page 2 - Page 3 - Page 4 - Page 5 - Page 6 - Page 7 - Page 8 - Page 9 - Page 10 - Page 11 - Page 12 - Page 13 - Page 14 - Page 15 - Page 16 - Page 17 - Page 18 - Page 19 - Page 20 - Page 21 - Page 22 - Page 23 - Page 24 - Page 25 - Page 26 - Page 27 - Page 28 - Page 29 - Page 30 - Page 31 - Page 32 - Page 33 - Page 34 - Page 35 - Page 36 - Page 37 - Page 38 - Page 39 - Page 40 - Page 41 - Page 42 - Page 43 - Page 44 - Page 45 - Page 46 - Page 47 - Page 48 - Page 49 - Page 50 - Page 51 - Page 52 - Page 53 - Page 54 - Page 55 - Page 56 - Page 57 - Page 58 - Page 59 - Page 60 - Page 61 - Page 62 - Page 63 - Page 64 - Page 65 - Page 66 - Page 67 - Page 68 - Page 69 - Page 70 - Page 71 - Page 72 - Page 73 - Page 74 - Page 75 - Page 76 - Page 77 - Page 78 - Page 79 - Page 80 - Page 81 - Page 82 - Page 83 - Page 84 - Page 85 - Page 86 - Page 87 - Page 88 - Page 89 - Page 90 - Page 91 - Page 92 - Page 93 - Page 94 - Page 95 - Page 96 - Page 97 - Page 98 - Page 99 - Page 100 - Page 101 - Page 102 - Page 103 - Page 104 - Page 105 - Page 106 - Page 107 - Page 108 - Page 109 - Page 110 - Page 111 - Page 112 - Page 113 - Page 114 - Page 115 - Page 116 - Page 117 - Page 118 - Page 119 - Page 120 - Page 121 - Page 122 - Page 123 - Page 124 - Page 125 - Page 126 - Page 127 - Page 128 - Page 129 - Page 130 - Page 131 - Page 132 - Page 133 - Page 134 - Page 135 - Page 136 - Page 137 - Page 138 - Page 139 - Page 140 - Page 141 - Page 142 - Page 143 - Page 144 - Page 145 - Page 146 - Page 147 - Page 148 - Page 149 - Page 150 - Page 151 - Page 152 - Page 153 - Page 154 - Page 155 - Page 156 - Page 157 - Page 158 - Page 159 - Page 160 - Page 161 - Page 162 - Page 163 - Page 164 - Page 165 - Page 166 - Page 167 - Page 168 - Page 169 - Page 170 - Page 171 - Page 172 - Page 173 - Page 174 - Page 175 - Page 176 - Page 177 - Page 178 - Page 179 - Page 180 - Page 181 - Page 182 - Page 183 - Page 184 - Page 185 - Page 186 - Page 187 - Page 188 - Page 189 - Page 190 - Page 191 - Page 192 - Page 193 - Page 194 - Flash version © UniFlip.com |
Arizona Faces and Features
On July 26, 1889, an American botanist arrived in the railroad town of Flagstaff, Arizona Territory. His name was Dr. Clinton Hart Merriam. He came to study the plants and animals of the southwestern United States. Hart, as his friends called him, came to seek proof for his lifezone theory. He believed that plant and animal homes were decided by the elevation of the land and the climate of that land. Elevation means height above sea level. Dr. Merriam believed that seven lifezones could be described between the equator and North Pole of the earth. He believed that all seven lifezones could be found within the Arizona Territory. Dr. Merriam defined a lifezone as a region of land where specific types of plants lived. Each lifezone was thought to contain plants that could only naturally live within that zone. The types of plants that could grow within a lifezone were dependent on four factors: 1. Type of soil that makes up the land 2. Slope of the land 3. Elevation of the land above sea level 4. Amount of yearly rain or snow that falls on the land Animals depend on plants to live. Animals live in the lifezone in which they can best find food, water, and shelter. Animals do move from one lifezone to another, but they do have a specific lifezone in which they can best live and raise their young. There are no specific lines between the lifezones. They blend together on the land. Where this blending happens, plants typical to both lifezones will be found growing. Dr. Merriam identified these seven lifezones: 1. Arctic-Alpine lifezone 2. Hudsonian lifezone 3. Canadian lifezone 4. Transition lifezone 5. Upper Sonoran lifezone 6. Lower Sonoran lifezone 7. Tropical lifezone Arizona is believed to contain six of the seven lifezones. Only the Tropical lifezone is not found in Arizona.
r
r
r
r
Quaking Aspen trees in Arizona are found in the Canadian lifezone.
22 Chapter 2 • The Land
|