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Five ecologically d istinct functional groups Three trophic levels

Five ecologically d istinct functional groups Three trophic levels. Continuous Plankton Recorder. http://www.sahfos.ac.uk/. A diatom, showing the typical results for diatoms and copepods. A dinoflagellate , showing the typical results for dinoflagellates and zooplankton.

sigourney-tyler
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Five ecologically d istinct functional groups Three trophic levels

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  1. Five ecologically distinct functional groups Three trophic levels

  2. Continuous Plankton Recorder

  3. http://www.sahfos.ac.uk/

  4. A diatom, showing the typical results for diatoms and copepods A dinoflagellate, showing the typical results for dinoflagellates and zooplankton

  5. Marine food-web succession: copepods and diatoms first, followed by primary and secondary consumers

  6. Little shift in mean seasonal peak – peak during turnover in water column responding to photoperiod cues

  7. Advance in mean seasonal peak – peak after turnover in water column responding to temperature cues

  8. Peak abundance is: Earlier Later Regression of T on year: = 0.9deg C over 43 years

  9. Units of Y-axis are months

  10. Producers Consumers

  11. Climate Envelope Modelling Approach: Observed effects on (distribution, abundance) and growth of temperature and dissolved O2 2. Projected changes in temperature and dissolved O2 under SRES A2 Scenario.

  12. Cod Haddock

  13. Chinook and RBT: 24 C thermal tolerance • Bull trout: 14.4 C thermal tolerance • 95th percentile of frequency distribution • on a weekly scale John Day River system Hobo temperature loggers

  14. Max stream temperature = fn (max air temp + solar radiation)

  15. AIR TEMPERATUREPROJECTIONS A1B emissions scenario

  16. Historic (1993-2009) Projection (2070-2099) Chinook and RBT: 24 C thermal tolerance Bull trout: 14.4 C thermal tolerance

  17. 2070 -2099 vs 1993 - 2009 MS – main stems TRB – tributaries ALL - combined L – loss by reach length V- loss by reach volume

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