PLS 147 Study Guide - Spring 2018, Comprehensive Midterm Notes - California, Montane Ecosystems, Perennial Plant

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12 Oct 2018
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PLS 147
MIDTERM EXAM
STUDY GUIDE
Fall 2018
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plant community
ecological community
ecosystem
set of interacting plants that co-occur in a particular place and
time
also their characteristics like relative abundance and
spatial distributions
w/ animals and microbes
w/ abiotic and landscape-scale aspects like nutrient cycling,
topography, soils
can we classify and
delineate plant
communities as
separate entities
are there really sharp
boundaries?
How do we describe
a community?
vegetation map
maps imply boundaries and ecotones
how they are often distributed is more variable
lines are arbitrary
sharp boundaries can occur when
spatial
abrupt change in soils or hydrology
eg serpentine soils, vernal pools, riparian
a community dominante determines the
presence/absence of many species
eg timberline (edges of the trees b/c pine
needles change the soil, etc), grasslands,
sierra conifers
temporal
succession after a fire
plant communities are both real & imagined. even though boundaries
are fuzzy and variable, it is still helpful for us to label them.
Floristics (species name)
what species are there and their relative abundance
Physiognomy (what it looks like)
cover, height, life forms
eg forest/grassland/shrubland
community names are a mixture of both
eg coast redwood forest, oak woodland, perennial bunchgrass
prairie
Forest
nearly complete woody canopy cover (60-100%)
implies a certain height, cant see sky
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Woodland
Savanna
Grassland
Shrub
moderate canopy cover (25-60%)
low canopy cover (10-25%)
mainly open, few trees
little/no woody cover (0-10%)
prairie
variable cover
chaparral: complete woody cover but low height
different systems use different cut-offs for a continuous variation
canopy layers
emergent trees
rare, very tall like forest trees
canopy
main layer
sub-canopy
and shrub layer
woody understory (shrub layer)
herbaceous understory (ground vegetation)
plant life forms
herbaceous: not woody
annual or perennial
grass or forb ("herb" eg wildflowers)
semi-woody (suffrescent)
woody
tree (single stem)
● shrub (multiple stemmed, short)
Trees
coniferous/needle-leaved
all evergreen (and gymnosperms)
broad-leaved
evergreen
deciduous
winter or summer (dry)
hierarchy organization: series & association (europe: class & order
too)
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Document Summary

Set of interacting plants that co-occur in a particular place and time. Also their characteristics like relative abundance and spatial distributions w/ animals and microbes w/ abiotic and landscape-scale aspects like nutrient cycling, topography, soils vegetation map. How they are often distributed is more variable. Lines are arbitrary sharp boundaries can occur when. A community dominante determines the presence/absence of many species. Eg timberline (edges of the trees b/c pine needles change the soil, etc), grasslands, sierra conifers. Succession after a fire plant communities are both real & imagined. even though boundaries are fuzzy and variable, it is still helpful for us to label them. What species are there and their relative abundance. Eg forest/grassland/shrubland community names are a mixture of both prairie. Eg coast redwood forest, oak woodland, perennial bunchgrass. Implies a certain height, cant see sky. Rare, very tall like forest trees canopy. And shrub layer woody understory (shrub layer) herbaceous understory (ground vegetation) herbaceous: not woody.

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