Workshop Agenda by HZPSpuY5

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									 Semi-Arid wetland
conceptual modelling

  Ben Gawne & Amina Price
          MDBA
     Adjust    Evaluate




Assess               Monitor




    Design    Implement




                    Adapted from Nyberg 1999
            MDBA Objectives
 Key   questions;
     What is condition of Basin?
     What is condition of key environmental
      assets?
 Answering these questions requires a
 monitoring program that;
     Can be integrated with other monitoring
      programs being undertaken by MDBA
     Is consistent across MDB
      Collaborative Approach
 Nation Land & Water Resources Audit
 National Water Commission
 Dept. of Environment, Water, Heritage and
  Arts
 NRM Ministerial Council
 Wetlands and Waterbirds Taskforce
 State Governments
           Conceptual Models
 Foundation    for development of monitoring
 States in process of developing models for
  all climatic regions except semi-arid region
 MDBA took lead in semi-arid wetlands
     Facilitate consistent approach across the
      northern basin
     Models provide a tool for directing investment
      in wetland monitoring and research across the
      MDB
                 Model Objectives
   Design Condition Assessment
       Underpin indicator selection
   Synthesise current knowledge and identify
    knowledge gaps
       Key Components
       Key Drivers
       Key Processes
   Communication Tool
       Explain wetland ecology
       Justify indicator selection
                   Process
   Based on Queensland EPA typology, 9 wetland
    types identified in Semi-Arid region.
   Consultation with States, reduced to 7
   Draft models developed by Amina Price and
    Lana Heydon (saline swamps)
   Information pulled from a variety of sources
   Draft models presented to expert workshop
   Conceptual Models finalised
    Typology

   Character
   Description

    Process          Generic Threat
Conceptual Model        Model

                   Pressure-Response
                         Model



   Condition
   Indicators       Stress Indicators
               Wetland Types
   Saline lakes
   Saline swamps
   Commonly wet freshwater lakes
   Periodically-inundated floodplain freshwater
    lakes
   Periodically-inundated depressional freshwater
    lakes
   Floodplain freshwater swamps
   Depressional freshwater swamps
                                                   Approach
                                                            Type Character

                                                               Hydrology


Type Character 1                    Type Character 2                   Type Character 3                  Type Character 4


           Vegetation                         Vegetation                         Vegetation                         Vegetation



  Primary                            Primary                            Primary                            Primary
                    High Organic                       High Organic                       High Organic                       High Organic
 Production                         Production                         Production                         Production


Invertebrates                      Invertebrates                      Invertebrates                      Invertebrates
                        Low DO                             Low DO                             Low DO                             Low DO


    Fish                               Fish                               Fish                               Fish



   Birds                              Birds                              Birds                              Birds
Climate     Topography
                         Catchment
                           Area      Complexity
                                     Morphology   River
                                                                 River
                                                               Connection
                                                                          Groundwater
                                                                             Depth
                                                                                         Land Use    Soil



                                                   Water
                                                                        Morphology
                                                   Source

                                                           Extent duration,
                                                          depth, frequency,
                                                             seasonality
                                                                                        Time since
                                                                                        inundation
          Depth                       Water Quality            Nutrients

                                                               Primary
                                                              Production
          Soil            Vegetation
                                                            Invertebrates

      Grazing
                                                                   Fish


                                                                  Birds

                                                              Nest sites
                     Response
   Complexity
       Inundation Models
       Component Models



        Initial                  Water
                   Inundation              Dry
     Inundation                 receding
                  Water
                                      Morphology
                  Source


                         Extent duration,
                        depth, frequency,
                           seasonality
                                                   Time since
                                                   inundation
        Water Quality        Nutrients

                             Primary
                            Production
Vegetation
                          Invertebrates


                                 Fish


                                Birds
                                                                Component
                                                                Models
                            Nest sites
                      Typology

                     Character
  Component          Description
   Models
                       System         Generic Threat
  Key Driver        Understanding        Model
   Models
                                    Pressure-Response
    Key Driver                            Model
Inundation Models

                      Condition
                      Indicators     Stress Indicators
    Character Description Models
   Character description models have been
    completed for
      Permanent freshwater lakes

      Temporary freshwater floodplain lakes

      Shrub/Lignum swamps

      Eucalypt swamps

      Sedgeland/Grassland swamps

      Temporary freshwater non-floodplain lakes.

      Saline lakes

      Saline swamps
                      Typology

                     Character
  Component          Description
   Models
                       System         Generic Threat
  Key Driver        Understanding        Model
   Models
                                    Pressure-Response
    Key Driver                            Model
Inundation Models

                      Condition
                      Indicators     Stress Indicators
               Component Models
   Component Models have been completed for
       Hydrology – water source, duration of inundation, frequency of
        inundation, summarised into an inundation regime model
       Geomorphology
       Water Quality - pH, turbidity, DO, temperature and salinity
       Dissolved nutrient loads
       Microbial Community
       Dominant vegetation
       Dominant form of primary production
       Invertebrates
       Frogs
       Fish
       Waterbirds
Component Model 8: Dissolved
  Nutrient Concentrations


                                         Wetland hydrology
                                                                                  Catchment and
                                          (see component        Geology
                                                                                riparian vegetation
                                             model 2)




        Microbial community
         composition and
                                                              Allochtonous
             production        Decomposition
                                                                  inputs
          (see component
             model 11)



                               Nutrient release
                               from sediments
                                 and organic
                                   material




              Primary             Nutrient                      Secondary
          production rates     concentrations                production rates
 Component Model 13: Fish
Community Composition and
      Abundance


  Presence, structure                         Wetland                Wetland hydrology
     and density of                       geomorphology               (see component
  aquatic and fringing                    (see component                model 2) and
    vegetation (see                          model 1)                inundation depth
  component models
    9 and 10) and
     woody debris

                                                                                                             Proximity and
    Physical habitat                                                                                         connection to
                                                                                                                                                  Dispersal capacity
      complexity                                                                                              colonisation
                                                  Inundation depth                                              sources



                                                                                           Invertebrate
                                                                                            community
                                                                                         composition and
                                                                                            abundance
                                                                                         (see component
                                    Water chemistry                                          model 12
                                     and character
                                    (see component                                                                                                    Degree of
                                      models 3-7)                                                           Food availability
                                                                                                                                                      dispersal




                       Predation levels

                                                                                                           Competition levels


    Waterbird
    community
 composition and
   abundance                                                                                                                    Fish community
 (see component                                                                                                                 composition and             Insitu recruitment
    model 14)                                                                                                                     abundance


 Frog community
 composition and
   abundance
 (see component
    model 15)


                                                                                                                                   Bioregion
                      Typology

                     Character
  Component          Description
   Models
                       System         Generic Threat
  Key Driver        Understanding        Model
   Models
                                    Pressure-Response
    Key Driver                            Model
Inundation Models

                      Condition
                      Indicators     Stress Indicators
            Key Driver Models
   Key Driver models have been completed for
     Permanent freshwater lakes

     Temporary freshwater floodplain lakes

     Freshwater floodplain swamps

     Freshwater non-floodplain swamps

     Temporary freshwater non-floodplain lakes.

     Saline lakes

     Saline swamps
Saline Lakes
                                                     Frequency of           Duration of
Key Drivers                      Water source                                                                                           Presence of
                                                      inundation            inundation       Wetland               Degree of wind
                               (see component                                                                                       fringing palustrine
                                                   (see component        (see component     morphology                mixing
                                  model 1)                                                                                                 habitat
                                                       model 2)              model 3)




                                                            Inundation regime
                                                             (see component
                                                               model 4) and
                                                                  depth




                                                                                                                     Substrate
                                                                                                                   heterogeneity
                             Water quality
                           (see component                                                 Inundation phase
                             models 5-9)

                                                                     Nutrient loads
                                                                    (see component
                                           Salinity                    model 10)
                  Other water
                                       (see component
               quality parameters
                                          model 7)




                                                                     Dominant form
                                                                       of aquatic
                                                                        primary
                                                                       production
                                                                    (see component
                                                                       model 12)



                                                                    Invertebrate and
                                                                     fish community
                                                                    (see component
                                                                    models 13 & 14)




                                                                       Waterbird
                                                                       community                                                        Fringing
                                                                    (see component                                                     vegetation
                                                                       model 15)

                                                                                                 Availability of
                                                                                                 nesting sites
                                                                                                                                    Geomorphology
   Generic Wetland Driver
           Model




Wetland hydrology
 (see component                Inundation regime              Inundation phase
    model 2)



                                                                                                                Dominant form of
                                                                                              Water chemistry
                                                                                                                 aquatic primary
                                                                                               and character
                                Inundation depth                                                                   production
                                                                                              (see component
                                                                                                                (see component
                                                                                                models 3-8)
                                                                                                                   model 10)

                                                                                                                    Microbial
                                                                                                                                   Resting stage
                                                                                                                   community
                                                                                                                                    viability and
      Wetland                                                                                                   (see component
                                                                                                                                    composition
  geomorphology         Degree of wind                                                                             model 11)
  (see component           mixing
     model 1)
                                                                                                                  Invertebrate
                                                                                                                   community
                                                                                                                (see component
                                                                             Vegetation                            models 12)
            Substrate type                                                    structure
           and heterogeneity                                              (see component
                                                                              model 9)                          Fish community
                                                                                                                (see component
                                                                                                                   model 13)


                                                                           Physical habitat
                                                                                                                Frog community
                                                                                                                (see component
                                                                                                                   model 15)
                                         Dispersal capacity

                                                                             Degree of                             Waterbird
                                                                             dispersal                             community
                                           Proximity and                                                        (see component
                                           connection to                                                           model 14)
                                            colonisation
                                              sources
                      Typology

                     Character
  Component          Description
   Models
                       System         Generic Threat
  Key Driver        Understanding        Model
   Models
                                    Pressure-Response
    Key Driver                            Model
Inundation Models

                      Condition
                      Indicators     Stress Indicators
          Driver Inundation Models
   Character description models have been
    completed for
      Permanent freshwater lakes

      Temporary freshwater floodplain lakes

      Freshwater floodplain swamps

      Freshwater non-floodplain swamps

      Temporary freshwater non-floodplain lakes.

      Saline lakes

      Saline swamps
  Saline Lakes inundation         Initial inundation of dry or
          Processes              partially dry lake by inflowing
                                                                                                                                                     Inundation                                Water receding                                              Dry phase
 Note: all of the components       creeks, local run-off and
  represented in this model            direct precipitation
   may not be present in all
saline lakes (see saline lakes
   key driver and character           Some nutrients and
 description models for more       organic material may be
                                     imported with run-off                                                                                                                                                                                              Consolidation of
             detail)                                                                                                                                  Uptake and                            Increased concentration
                                                                                                                                                                                                                                                         sediments and
                                                                   Decomposition of                                                                transformation of                        of nutrients, turbidity and
                                                                                                                                                                                                                                                     mineralisation of organic
                                                                   particulate organic                High productivity                         nutrients and carbon by                                 salt
                                                                                                                                                                                                                                                             material
                                                                         material                                                               primary and secondary
                                                                                                                                                       producers
                                    Rapid nutrient release                                                                                                                                    Decreased buffering
                                    from plant matter and                                                                                                                                   capacity resulting in wide
                                           topsoil                                                                                                                                            fluctuations in water
                                                                                                                                                                                                     quality
                                                                               Decomposition of
                                                                             terrestrial vegetation

                                                                                                                                                  Changes in habitat                                                          Establishment of
                                    Inundation of terrestrial                                                                                                                                  Changes in algal
                                                                                                                                                structure and diversity                                                    amphibious plants in          Establishment of
                                       and amphibious                                                                                                                                       abundance and species
                                                                                                                                                                                                                           drier areas of the lake       terrestrial plants
                                          vegetation                                                                                                                                             composition
                                                                                                                                                                                                                                    bed
                                                                             High aquatic habitat
                                                                           abundance and diversity


                                                                                                                                                                                                                                                     Aquatic vegetation dies
                                       Germination of                                                                     Growth and reproduction                                           Reproduction of aquatic
                                                                                                                                                                                                                                                     back to seed banks and
                                   vegetative resting stages                                                               of aquatic vegetation                                                 vegetation
                                                                                                                                                                                                                                                         resting stages




                                                                                                                                                                                                Increased algal
                                                                                                                                                                                                                                                       Desiccation resistant
                                     Germination of algal                    Rapid colonisation by                                                                                          abundance and changes
                                                                                                                                                                                                                                                     species of algae die back
                                       resting stages                               algae                                                                                                       in algal species
                                                                                                                                                                                                                                                         to resting stages
                                                                                                                                                                                                  composition




                                                                                                                          Possible colonisation by                                             Decreased aquatic                                         Colonisation by
                                                                                                                            fish (dependent on                                                  habitat available                                        terrestrial fauna
                                                                                                                            salinity and level of
                                                                                                                            connection to other                     Establishment of
                                                                                                                                waterbodies)                     invertebrate and/or fish                                   Increased levels of
                                    Invertebrate egg bank/                   Rapid colonisation by
                                                                                                                                                                     communities –                                             predation and
                                   resting stage emergence                    microinvertebrates
                                                                                                                                                                    reproduction and                                            competition
                                                                                                                                                                       recruitment
                                                                                                                                                                                               Increased predator
                                                                                                                             Colonisation by
                                                                                                                                                                                               abundance in some
                                                                                                                            macroinvertebrates
                                                                                                                                                                                                      lakes

                                                                                                                                                                                                                                                       Aquatic invertebrates
                                                                                                                                                                                                                            Dispersal to refuge
                                                                                                                                                                                                                                                       occur as egg banks,
                                                                                                                                                                                                                           habitats by some fish
                                      Aerial dispersal by                                                                                                                                                                                              resting stages and in
                                                                                                                                                                                                                          and invertebrate species
                                            insects                                                                                                                                                                                                        moist habitats




                                                                                                                              Colonisation by                                                                             Dispersal of waterbirds
                                                                                                                                                                   Waterbird breeding
                                                                                                                                waterbirds                                                                                   to other wetlands




                                                                                                                                                                                                                                                      Salt crusts form on dry
                                      Mobilisation of salt                                                                                       Decrease in salinity                          Increase in salinity
                                                                                                                                                                                                                                                             lake bed




                                     Aquifer/groundwater                                                                                                                                                                                               Aquifer/groundwater
                                          recharge                                                                                                                                                                                                          discharge
 Initial inundation of dry or
partially dry lake by inflowing
                                                                                                                   Inundation            Water receding
  creeks, local run-off and
      direct precipitation


     Some nutrients and
  organic material may be
    imported with run-off                                                                                                             Increased concentration
                                                                                                                  Uptake and
                                  Decomposition of                                                             transformation of      of nutrients, turbidity and
                                  particulate organic                High productivity                      nutrients and carbon by               salt
                                        material                                                            primary and secondary
                                                                                                                   producers
   Rapid nutrient release                                                                                                               Decreased buffering
   from plant matter and                                                                                                              capacity resulting in wide
          topsoil                                                                                                                       fluctuations in water
                                                                                                                                                quality
                                              Decomposition of
                                            terrestrial vegetation

   Inundation of terrestrial                                                                                  Changes in habitat         Changes in algal
      and amphibious                                                                                        structure and diversity   abundance and species
         vegetation                                                                                                                        composition
                                            High aquatic habitat
                                          abundance and diversity



      Germination of                                                                     Growth and reproduction                      Reproduction of aquatic
  vegetative resting stages                                                               of aquatic vegetation                            vegetation




                                                                                                                                          Increased algal
    Germination of algal                    Rapid colonisation by                                                                     abundance and changes
      resting stages                               algae                                                                                  in algal species
                                                                                                                                            composition
                                 Inundation            Water receding                                             Dry phase




                                                                                                               Consolidation of
                                Uptake and          Increased concentration
                                                                                                                sediments and
                             transformation of      of nutrients, turbidity and
                                                                                                            mineralisation of organic
vity                      nutrients and carbon by               salt
                                                                                                                    material
                          primary and secondary
                                 producers

                                                      Decreased buffering
                                                    capacity resulting in wide
                                                      fluctuations in water
                                                              quality



                            Changes in habitat                                       Establishment of
                                                       Changes in algal
                          structure and diversity                                 amphibious plants in          Establishment of
                                                    abundance and species
                                                                                  drier areas of the lake       terrestrial plants
                                                         composition
                                                                                           bed




                                                                                                            Aquatic vegetation dies
       Growth and reproduction                      Reproduction of aquatic
                                                                                                            back to seed banks and
        of aquatic vegetation                            vegetation
                                                                                                                resting stages




                                                        Increased algal
                                                                                                              Desiccation resistant
                                                    abundance and changes
                                                                                                            species of algae die back
                                                        in algal species
                                                                                                                to resting stages
                                                          composition
      Workshop Recommendations
 Scale:
     Conceptual models are of individual wetlands.
     Experts believe that models of wetland
      complexes need to be developed
 Key   Driver Models:
     Experts hoped that generic model could be
      modified for different wetland types.
     Diversity of wetland types at this level of
      classification made this difficult.
               Design Process
    Typology

   Character
   Description

    Process             Generic Threat
Conceptual Model           Model

                      Pressure-Response
                            Model



   Condition
   Indicators          Stress Indicators
Questions?

								
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