BISC 3 Lecture Notes - Lecture 6: Hydrothermal Vent, Biome, Estuary
Document Summary
Tropical rainforests occur where rainfall is abundant more than 200 cm (80 in. ) per year. And temperatures are warm to hot year around. Tropical savanna and grasslands are dry most of the year. Where there is too little rainfall to support forests, we nd open grasslands or grasslands with sparse tree cover, which we call savanna. Deserts are hot or cold, but always dry. Deserts occur where precipitation is uncommon and slight, usually with less than 30 cm of rain per year. As in tropical latitudes, temperate (midlatitude) grasslands occur where there is enough rain to support abundant grass but not enough for forests. These forests are grouped by tree type, broad-leaved deciduous (losing leaves seasonally) or evergreen coniferous (cone-bearing). The coniferous forests of the paci c coast grow in extremely wet conditions. The wettest coastal forests are known as temperate rainforest, a cool, rainy forest often enshrouded in fog.
