Byrnes intecol
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Byrnes intecol

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My talk from the 2013 INTECOLBiodiversity, ecosystem services and multifunctional landscapes symposium organizes by Lars Gamfeldt and Jan Bengtsson

My talk from the 2013 INTECOLBiodiversity, ecosystem services and multifunctional landscapes symposium organizes by Lars Gamfeldt and Jan Bengtsson

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Byrnes intecol Byrnes intecol Presentation Transcript

  • Measuring the effects of change in biodiversity on multiple ecosystem functions Jarrett  Byrnes,  Lars  Gamfeldt,  Forest  Isbell,  Jonathan  Lefcheck,  John  Griffin, Andrew  Hector,  Bradley  Cardinale,  David  Hooper,  Laura  Dee,  J.  Emmett  Duffy UMass Boston, University of Gothenburg, University of Minnesota, Virginia Institute of Marine Sciences, Swansea University, University of Zurich, University of Michigan, Western Washington University, University of California Santa Barbara, Virginia Institute of Marine Sciences http://jebyrnes.github.io/intecol-multifunc
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  • Meta-­‐analysis  Trio:  Diversity  Affects  Function Balvanera et al. 2006 Eco. Let. 3/25
  • But  Are  Only  Two  Species  Needed? Cardinale et al. 2006 Balvanera et al. 2006 Eco. Let. 4/25
  • Duffy et al. 2003 Ecology Letters 5/25
  • Multifunctionality: the simultaneous performance of multiple functions 6/25
  • How  to  Measure  Multifunctionality 1. Past Methods of 'Measuring' Multifunctionality 2. At the Threshold of a Solution 3. Future Explorations of BEMF 7/25
  • An  Example:  Biodepth 8/25
  • Functions  Measured  in  Germany 9/25
  • Different  Ways  of  Measuring  Multifunctionality 1. Overlap in Species Influencing Function 2. Average Function 3. Number of Functions Performing at a Threshold 10/25
  • Overlap  in  Species  Influencing  Function This is not a measure of Multifunctionality 11/25
  • Average  of  Standardized  Functions Many results lead to the same line 12/25
  • Number  of  Functions  Performing  at  a  Threshold Threshold may be arbitrary 13/25
  • How  to  Measure  Multifunctionality 1. Past Methods of 'Measuring' Multifunctionality 2. At the Threshold of a Solution 3. Future Explorations of BEMF 14/25
  • Thresholds  Seem  Arbitrary 15/25
  • Slope  Changes  Systematically  Across  Thresholds 16/25
  • Slope  Changes  Systematically  Across  Thresholds 17/25
  • Slope  Changes  Systematically  Across  Thresholds 18/25
  • Slope  Changes  Systematically  Across  Thresholds 19/25
  • How  to  Measure  Multifunctionality 1. Past Methods of 'Measuring' Multifunctionality 2. At the Threshold of a Solution 3. Future Explorations of BEMF 20/25
  • Comparing  Systems 21/25
  • Comparing  Systems  Behaviour 22/25
  • Assessing  Generality  of  Metrics 23/25
  • How  do  We  Measure  Multifunctionality? 1. Multifunctionality is a nuanced phenomenon 2. Multiple methods in the literature address different aspects of multifunctionality 3. Examining the relationship between diversity and # of Functions > a threshold at multiple thresholds provides new promising metrics These methods not limited to biodiversity- ecosystem function research 24/25
  • Thanks  to  NCEAS  &  the  BEF  Working  Group Paper: http://bit.ly/multifunc R Multifunc Library: https://github.com/jebyrnes/multifunc 25/25