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Chapter 25 Populations and Ecosystems (The Structure of Ecosystems…
Chapter 25 Populations and Ecosystems
Plants in Relationship to Their Habitats
Abiotic Components of the Habitat
Soil Factors
A horizon
B horizon
pioneers
C horizon
Latitude and Altitude
Climate
tolerance range
Disturbance
Biotic Components of the Habitat
Other Plant Species
competitive exclusion
niche
mutualism
ecotypes
Organisms Other Than Plants
predation
pathogenic
commensal relationships
frugivores
The Plant Itself
operational habitat
The Structure of Populations
Age Distribution: Demography
biotic potential
#
carrying capacity
generation time
r- and K- Selection
r-Selection
annuals or small shrubby perennials
K-Selection
Douglas firs and bristle-cone
Geographic Distribution
Boundaries of the Geographic Range
limiting factor
Local Geographic Distribution
#
clumped distributions
uniform distributions
random distribution
The Structure of Ecosystems
Temporal Structure
ecosystem undergoes with time constitute
Species Composition
number and diversity of species that coexist
Physiognomic Structure
life forms
Trophic Levels
#
secondary consumers
decomposers
primary consumers
