Transcript ALFISHES: - ATLSS Home Page frame

ATLSS Models for Predicting the Impact
of Hydrology on Wildlife Populations in
the Everglades Mangrove Zone of
Florida Bay
Jon Cline
University of Tennessee
Overview
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Introduction
Objectives
The Ecology
The Model
On-going
Development
ATLSS Objectives
The ATLSS (Across Trophic Level System
Simulation) hierarchy of models is designed to
utilize varying levels of detail and data availability
to assess the relative impact of alternative
hydrological plans on the biotic components
of South Florida.
ATLSS is being used regularly in the ongoing
planning for Everglades restoration
(see http://atlss.org/).
Estuarine Component Dependencies
Individual-Based
Models
Age/Size Structured
Models
Cape Sable
Seaside Sparrow
Snail Kite
Manatees
White-tailed Deer
Wading Birds
Crocodiles
Florida Panther
Freshwater Fish
Functional Groups
Radio-telemetry
Tracking Tools
Reptiles and Amphibians
Estuarine Fish
Functional Groups
Alligators
Linked Cell
Models
Process Models
Spatially-Explicit
Species Index Models
Vegetation
Lower Trophic Level Components
Cape Sable
Seaside Sparrow
Long-legged
Wading Birds
Short-legged
Wading Birds
Alligators
Snail Kite
Abiotic Conditions
Models
High Resolution Topography
Disturbance
White-tailed Deer
High Resolution
Freshwater Hydrology
High Resolution
SICS Hydrology
and Salinity
Introduction
• ATLSS models of fish and wildlife
populations in the mangrove zone
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Small estuarine fish (ALFISHES)
Crocodile (currently in devlopment)
Wading birds (planned)
Manatees (planned)
• Linking hydrology to population
dynamics
Objectives
• The primary objective of ALFISHES is to
predict the impact of hydrology on resident
fishes of the Everglades mangrove zone of
Florida bay.
• The ultimate goal of the model is use these
predictions of fish biomass to assess the
availability of prey base fish to wading
birds and crocodiles.
The Ecology: The Habitat
• The creeks and flats of
the Mangrove zone.
• Seasonal flooding
• Changes in bay level
The Ecology: Hypotheses
• The resident fish biomass is negatively
impacted by saline period due to reduced
food availability
• The resulting fish community is less robust
than the historic one
0.8
A
Log g/m2
0.7
Mean Biomass
B
0.6
C
C
0.5
D
0.4
0.3
Freshwater
Transitional
Oligohaline
Mesohaline
Salinity Cluster
Polyhaline
The Model Landscape
• Greater Everglades
into several subregions
• The estuarine fish
model includes two
sub-regions
– E. Panhandle ME and
– LP Key/STS ME
The Model Landscape with SICS
Model Area Overlay
The Model Landscape
Hydrology
Vegetation
Topography
Southern Inland Coastal
Systems (SICS)
numerical model (Swain
1999)
Florida Gap Analysis
Map (FGAP v6.6)
ATLSS High Resolution
Topography (HRT)
The Model Landscape
• 500×500 meter cells
• Physical factors (per
cell)
– Water depth
– Salinity
– microhabitat
On-going Development
• Develop a single cell version of the model
based on hydrology and elevation data
collected at four field sites
• Extend the HRT model to include the
Everglades mangrove ecotone
• Incorporate SICS model hydrology data into
the landscape fish model