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

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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  • 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. (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. Photo: Agencia EFE
  • 4. “Extremely simple” biological communities (Medina-Sánchez et al., L&O 2004)
  • 5. 3482 mHigh Mountain Lakes = Global change labs
  • 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. Mediterranean HighMountain lakesLow latitude and High altitude HIGH UV IRRADIANCE Photo: NASA
  • 8. Mediterranean HighMountain lakesProximity Major dust sources HIGH ATMOSPHERIC AEROSOL INPUTS Photo: NASA
  • 9. Mediterranean HighMountain lakesProximity Major dust sources HIGH ATMOSPHERIC AEROSOL INPUTS Photo: NASA
  • 10. (Carney & Elser, 1990; Villar-Argaiz et al., 2001; Nuwer et al., 2008)Mixodiaptomus laciniatus (~100% biomass)
  • 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. Experimental Studies Growth (growth rate)
  • 13. ― UVR (plexiglass) + UVR 60 40 60 40Control 20 30 Control 20 30 (2700 L) 2 X 5 factorial design
  • 14. + UVR - UVR (Carrillo et al., GCB 2008; Bullejos et al., L&O 2010 in press)
  • 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. 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. 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. Nutrients X UVRNutrients Villar-Argaiz et al. In Review
  • 19. Effects on zooplankton growth of UVR (1), Nutrients (2) and their interaction NUTRIENTS NUTRIENTS and UVR Villar-Argaiz et al. In Review
  • 20. Population dynamicsExperimental Studies
  • 21. (Bullejos et al., L&O 2010 in press)
  • 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. Population dynamicsAbiotic/biotic Monitoring Observational Studies
  • 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. Abioticcharacterization Villar-Argaiz et al. In Review
  • 26. Abioticcharacterization Photo credit: R. Morales Deposition event AI =0.5 Large deposition event AI > 5 Villar-Argaiz et al. In Review
  • 27. Population Dynamics Villar-Argaiz et al. In Review
  • 28. Villar-Argaiz et al. In Review
  • 29. Phytoplankton Zooplankton(Bullejos et al., L&O 2010 in press)
  • 30. Strong UVR roleLow-Moderate atmospheric inputs No UVR role Strongatmospheric inputs Eutrophication High grazing herbivores (Daphnia)
  • 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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