deconstructing your action a strategy for analyzing impacts on bird populations
TRANSCRIPT
Deconstructing Your Action
A Strategy for Analyzing Impacts on Bird Populations
A thorough analysis of an action’s impacts on the species and its resources is an essential component of the coordination process to
reduce impacts to migratory birds
Effects Analysis
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Analyzing Effects
Deconstruct the Action• Break the proposed action into its separate components
Exposure• Identify which birds and resources will be affected by
produced stressors
Response• Understand the consequences to birds from stressor
exposure
Goal and Objective
Goal:
Determine whether a species and/or its resources will be exposed to stressors
produced by project activities
Objective:
Link cause and effect relationships between an activity and bird demography
• Raise awareness to how actions affect birds• Provide transparent and logical step-wise process • Identify appropriate conservation measures• Optimizes the allocation of staff and funding
BENEFITS
Deconstructing the Action• Identify PROJECT TYPE• Identify ALL ACTIVITIES associated with the
Project• Identify STRESSORS produced by ALL activities
Project Type
Activity 1
Stressor 1
Stressor 2
Stressor 3Activity 2
Activity 3
Activity 4
Transmission Line
Development
Cement Pad Construction
Vegetation Removal
Human Disturbance Noise
Activity 2 Activity 3 Activity 4
Understanding ExposureBird Conservation Needs• All species have three main conservation needs– Breeding– Sheltering– Feeding
• Specific resources are required to meet these conservation needs
Resources• Appropriate Vegetation Structure– Nest sites– Food– Shelter from weather
• Access to food for adults and young• “Healthy Space” (natural balance)– Predators– Parasites– Competitors– Disease– Other Disturbances
Resource 1Breeding
Sheltering Species 1
Resource 2 Feeding
Shrubs
Breeding
Sheltering Allen’s Hummingbird
Flowers Feeding
Understanding Response
How do birds and/or their resources respond when exposed to a stressor?
• Consider all life stages
• Are there reported responses
– scientific and commercial information
• If no information, use the precautionary principle to determine the most likely response
Increasing Severity
Behavioral LethalSub-Lethal
DeathNo Response
AlarmStartle
Abandonment
Avoidance
Displacement
Reduced Feeding Success
Reduced Growth Rates
Reduced Fecundity
Delayed Age at Sexual Maturity
Reproductive Failure
Altered behavioral displays
Increased respiration
Depressed autoimmune responses
<10% probability of death
10-20% probability of death
20-40% probability of death
40-60% probability of death
Response Continuum
Project Type
Activity 1
Stressor 1
Resource 1Breeding
Feeding Species 1
Resource 2 ShelteringStressor 2
Stressor 3Activity 2
Activity 3
Activity 4
IMPACTS
EFFECTS
THREAT
FOCUS ON THE IMPACTS
Shrubs
Breeding
Allen’s Hummingbird
Transmission Line
Development
Cement Pad Construction
Vegetation Removal
Human Disturbance Noise
Activity 2 Activity 3 Activity 4
Dis
plac
emen
t
IMPACTS
EFFECTS
Reduced ProductivityLocal Population Declines
Reduced Pairing Success