Download - How the EDT Model Uses Life History
How the EDT Model Uses Life History
An Overview
Level 1- Wide range of data types
Level 2-Environmental Attributes
Level 3- Survival Factors
Act as umbrella attributes (classes of attributes) - "through the eyes of species" - short list
Survival factors define the relative contribution of different attribute classes to mortality
Data pyramid for deriving relative contribution of ecological attributes to life stage survival
EDT – Habitat Model Results = Species Habitat Potential
Raw Data andObservations
Species-Neutral Environment
Species-Life Stage View of Environment
The Beverton-Holt Function
Equilibrium Abundance
Recruits/Spawner (Density Dependent
Productivity)
Rec
ruits
(r
etur
ning
adu
lts/s
paw
ner)
Spawners(number in first generation)
Habitat Capacity
Habitat (Density Independent)
Productivity
EGGS
JUVENILES
SMOLTS
SUBADULTS
SPAWNING ADULTS
Aggregate Life Stage P = Population P
Number in first generation(e.g. spawners)
Num
ber
in n
ext g
ener
atio
n(e
.g.re
turn
s)Number in first generation
(e.g. spawners)
Num
ber
in n
ext g
ener
atio
n(e
.g.re
turn
s)
Number in first generation(e.g. spawners)
Num
ber
in n
ext g
ener
atio
n(e
.g.re
turn
s)
Number in first generation(e.g. spawners)
Num
ber
in n
ext g
ener
atio
n(e
.g.re
turn
s)
VSP-Relevant Parameters• Habitat Capacity• LS/Pop. Productivity• Equilibrium Abundance• DiversitySurvival (limiting) factors
Life History InformationUsed Here
Need to Think Broadly About Historical Potential!!
The EDT CornerstonesModel Habitat Environment
Species/Habitat Rules
Habitat Potential
Trajectory GeneratorTrajectory Generator
Reference scenario maximum potential Difference restoration potential Model for potential life history
expression
EDT Compares Scenarios
Reference Condition(Ideal)
PatientTemplate
Current or Future Condition (Degraded)
Loca
tion
Oce
anHe
adw
ater
s
Time (lifestage)
Trajectories Travel Through a Survival Landscape
Prespawning
Incubation
Fry Colonization
Summer Rearing
Overwintering
Migration
Time
Trajectories = range of life history expression
Different pathways have different survival rates
Survival (limiting) factor effect on LS productivity
Combined success rate = habitat productivity
% successful = diversity index
In Closing… Life history information used to parameterize
EDT trajectory generator
Emphasize both existing AND potential life history diversity
Don’t be too literal! Need to represent potential diversity (not just what exists today)
EDT selects successful trajectories
Level 2s + Sensitivity = Effect on P
CHANNEL MORPHOMETRY3 Channel Attributes
WATER QUALITY/BIOTIC STRESSORS13 Water Quality and Biotic Attributes
HYDROLOGY7 Flow Attributes
TEMPERATURE3 Temperature Attributes
CHANNEL/HABITAT CHARACTERISTICS20 Channel/Habitat Attributes Survival
Factors
Integrated Survival Factor Productivity
Creates Survival Landscape
No Effect (Optimal)
Low Effect
Moderate Effect
High Effect
Extreme/Lethal Effect