obal Change and the Worlds Mountains, Perth 2010  Propagation of global stressors  at the algae-consumer interface:       ...
(Urabe & Sterner 1996, PNAS)                                 Nutrients (P, N, Fe…)One of the most marked nutrient imbalanc...
Photo: Agencia EFE
“Extremely simple” biological communities                               (Medina-Sánchez et al., L&O 2004)
3482 mHigh Mountain Lakes = Global change labs
Snowline depends on altitude and latitudeLöfter H. 1969. High altitude lakes in Mt. Everest region. Verh.Int.Ver.Theor.Lim...
Mediterranean HighMountain lakesLow latitude and High altitude                                 HIGH UV IRRADIANCE         ...
Mediterranean HighMountain lakesProximity Major dust sources                               HIGH ATMOSPHERIC               ...
Mediterranean HighMountain lakesProximity Major dust sources                               HIGH ATMOSPHERIC               ...
(Carney & Elser, 1990; Villar-Argaiz et al., 2001; Nuwer et al., 2008)Mixodiaptomus laciniatus (~100% biomass)
…integrating different scales….                MID-TERM                   LONG-TERM         Population dynamics           ...
Experimental  Studies           Growth (growth rate)
― UVR (plexiglass)                                         + UVR          60        40                  60        40Contro...
+ UVR               - UVR        (Carrillo et al., GCB 2008; Bullejos et al., L&O 2010 in press)
Food quantity           – UVR                                       + UVR                        60                    60 ...
Food quality                   (same quantity distinct    quality)– UVR      + UVRControl   Control       20       20     ...
Herbivore consumer growth rate• Copepod & Daphnid growth rate              t = 12 d                             Somatic GR...
Nutrients X UVRNutrients                              Villar-Argaiz et al. In Review
Effects on zooplankton growth of UVR (1), Nutrients (2) and their interaction                                             ...
Population dynamicsExperimental  Studies
(Bullejos et al., L&O 2010 in press)
50         P-ENRICHMENT increased                                  40                     algae, whereas UVR              ...
Population dynamicsAbiotic/biotic Monitoring          Observational            Studies
http://jwocky.gsfc.nasa.gov/Data Product: AEROSOL INDEX            ITCZ (InterTropical Convergence Zone)           OZONE  ...
Abioticcharacterization                   Villar-Argaiz et al. In Review
Abioticcharacterization                   Photo credit: R. Morales                         Deposition                     ...
Population Dynamics                      Villar-Argaiz et al. In Review
Villar-Argaiz et al. In Review
Phytoplankton         Zooplankton(Bullejos et al., L&O 2010 in press)
Strong UVR roleLow-Moderate atmospheric    inputs                   No UVR role   Strongatmospheric   inputs              ...
Acknowledgment  > National Park of Sierra Nevada for permission and         help to study high mountain lakes.  > Finantia...
Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel V...
Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel V...
Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel V...
Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel V...
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Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel Villar-Argaiz]

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Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations (Session 6.3). Presented by Manuel Villar-Argaiz at the "Perth II: Global Change and the World's Mountains" conference in Perth, Scotland in September 2010.

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Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations [Manuel Villar-Argaiz]

  1. 1. obal Change and the Worlds Mountains, Perth 2010 Propagation of global stressors at the algae-consumer interface: From short- to long-term scales of observations Manuel Villar-Argaiz, JM Medina-Sánchez, FJ Bullejos, G Herrera, C Duran, S Rosillo and P Carrillo University of Granada, Spain Photo credit: NASA
  2. 2. (Urabe & Sterner 1996, PNAS) Nutrients (P, N, Fe…)One of the most marked nutrient imbalances in food webs is observed betweenplants and herbivores (Brett & Goldman 1997, Science)
  3. 3. Photo: Agencia EFE
  4. 4. “Extremely simple” biological communities (Medina-Sánchez et al., L&O 2004)
  5. 5. 3482 mHigh Mountain Lakes = Global change labs
  6. 6. Snowline depends on altitude and latitudeLöfter H. 1969. High altitude lakes in Mt. Everest region. Verh.Int.Ver.Theor.Lim. 17: 373-385
  7. 7. Mediterranean HighMountain lakesLow latitude and High altitude HIGH UV IRRADIANCE Photo: NASA
  8. 8. Mediterranean HighMountain lakesProximity Major dust sources HIGH ATMOSPHERIC AEROSOL INPUTS Photo: NASA
  9. 9. Mediterranean HighMountain lakesProximity Major dust sources HIGH ATMOSPHERIC AEROSOL INPUTS Photo: NASA
  10. 10. (Carney & Elser, 1990; Villar-Argaiz et al., 2001; Nuwer et al., 2008)Mixodiaptomus laciniatus (~100% biomass)
  11. 11. …integrating different scales…. MID-TERM LONG-TERM Population dynamics Population dynamics Abiotic/biotic Monitoring Observational Studies Experimental Studies Growth (growth rate) Nutrition (asimilaton carbon AEC)
  12. 12. Experimental Studies Growth (growth rate)
  13. 13. ― UVR (plexiglass) + UVR 60 40 60 40Control 20 30 Control 20 30 (2700 L) 2 X 5 factorial design
  14. 14. + UVR - UVR (Carrillo et al., GCB 2008; Bullejos et al., L&O 2010 in press)
  15. 15. Food quantity – UVR + UVR 60 60 (same quality distinct quantity ) No dilution Dilution 0.2 μm filtered water 100 %12.5 % 25 % 50 % – UVR – UVR + UVR + UVR – UVR + UVR – UVR + UVR
  16. 16. Food quality (same quantity distinct quality)– UVR + UVRControl Control 20 20 30 30 60 40 40 60 Dilution (0.2 μm) to Food Concentration of Treatment Control + UVR – UVR – UVR + UVR + UVR + UVR + UVR – UVR – UVR – UVR
  17. 17. Herbivore consumer growth rate• Copepod & Daphnid growth rate t = 12 d Somatic GR g = ln(Mt) - ln(M0) / t t=5d• Rotifer growth rate Intrinsic GR t = 13 d r = [ln(N13) - ln(N0) / t
  18. 18. Nutrients X UVRNutrients Villar-Argaiz et al. In Review
  19. 19. Effects on zooplankton growth of UVR (1), Nutrients (2) and their interaction NUTRIENTS NUTRIENTS and UVR Villar-Argaiz et al. In Review
  20. 20. Population dynamicsExperimental Studies
  21. 21. (Bullejos et al., L&O 2010 in press)
  22. 22. 50 P-ENRICHMENT increased 40 algae, whereas UVR slightly constrained algae 50 30 40 20 30 20control 30 40 STRONG P-ENRICHMENT 20 and UVR (at inter. P levels) 20 constrained zooplankton 30 40 50 50 control (Bullejos et al., L&O 2010 in press)
  23. 23. Population dynamicsAbiotic/biotic Monitoring Observational Studies
  24. 24. http://jwocky.gsfc.nasa.gov/Data Product: AEROSOL INDEX ITCZ (InterTropical Convergence Zone) OZONE REFLECTIVITY UV - IRRADIANCE PRECIPITATION National and International Environmental Agencies
  25. 25. Abioticcharacterization Villar-Argaiz et al. In Review
  26. 26. Abioticcharacterization Photo credit: R. Morales Deposition event AI =0.5 Large deposition event AI > 5 Villar-Argaiz et al. In Review
  27. 27. Population Dynamics Villar-Argaiz et al. In Review
  28. 28. Villar-Argaiz et al. In Review
  29. 29. Phytoplankton Zooplankton(Bullejos et al., L&O 2010 in press)
  30. 30. Strong UVR roleLow-Moderate atmospheric inputs No UVR role Strongatmospheric inputs Eutrophication High grazing herbivores (Daphnia)
  31. 31. Acknowledgment > National Park of Sierra Nevada for permission and help to study high mountain lakes. > Finantial support: I+D Projects, MMA-National Parks > Colleagues and students who helped with the sampling Thanks ! Manuel Villar- Argaiz
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