X1014315999-00041-09697</DOCNO> September 23, 1996 Human Dimensions of Climate Change Lecture notes for Monday, September 23, 1996 Earth's Major Biomes and long-term changes in vegetation Long-term Changes in Vegetation Earth's major biomes Number of classes and boundaries between biomes vary from one "expert" to another Biomes are named for the dominant organisms (e.g., grasslands) or for the dominant climate (e.g., desserts) Tundra Treeless plains that occur under harsh climates of low precipitation and low temperatures Two kinds of tundra Arctic Occurs at high latitudes Large and small mammals, birds, and insects Large territories Alpine Occur at high elevations Dominants animals are small rodents and insects Small isolated areas Dominant vegetation includes grasses and their relatives (sedges), mosses, lichens, flowering dwarf shrubs, and mat-forming plants Most plants develop thick roots that serve as storage organs Herbaceous species may live more than 100 yrs, dwarf shrubs 40-200 yrs Nitrogen fixers are common;
(1996 Human Dimensions of Climate Change Lecture; notes; T:for Monday) (Herbaceous species; may live; more than 100 yrs, dwarf shrubs 40-200 yrs Nitrogen fixers are common) (Number of classes and boundaries between biomes; vary; from one "expert) (small rodents and insects Small isolated areas Dominant vegetation; includes; grasses and their relatives) (thick roots; serve; as storage organs) (desserts) Tundra Treeless plains; occur; L:under harsh climates of low precipitation and low temperatures) (Nitrogen fixers; are; common) (Most plants; develop; thick roots that serve as storage organs) (Large territories; are; ) (Biomes; [is] Major [of]; Earth)
1996 Human Dimensions of Climate Change Lecture Herbaceous species Number of classes and boundaries between biomes small rodents and insects Small isolated areas Dominant vegetation thick roots desserts) Tundra Treeless plains Nitrogen fixers Most plants Large territories Biomes
notes may live vary includes serve occur are develop are [is] Major [of]
T:for Monday
more than 100 yrs, dwarf shrubs 40-200 yrs Nitrogen fixers are common
from one "expert
grasses and their relatives
as storage organs
L:under harsh climates of low precipitation and low temperatures
common
thick roots that serve as storage organs
Earth