PI: John Sabo

My training is in fisheries and food web ecology.  I have worked on salmon and the river food webs of the Pacific Northwest, lizards and riparian food webs of the Coastal Redwood Forest and detritivores and their predators in desert floodplain food webs.  Most recently my work has focused on water and can be characterized by three general themes: 1) water scarcity and its implications for natural and human water systems, 2) climate change, dams and hydrologic variability and the impact of these factors on food web structure and biodiversity in river ecosystems, and 3) the relationship between rivers and food security in both basic and applied contexts. This more recent work sets the stage for ongoing research by undergraduate & graduate students and postdoctoral fellows in my lab.

Graduate Student Author     Undergraduate Student Author

Colorado River in the Grand Canyon above Unkar Rapid

  1. Moody, E.K., J.R. Corman, J.J. Elser, and J.L. Sabo. In Press. Diet composition affects the rate and N:P ratio of fish excretion. Freshwater Biology.
  2. McCluney, K.E. and J.L. Sabo. 2014. Sensitivity and tolerance of riparian arthropod communities to altered water resources along a drying river. PLoS ONE 9: e109276.
  3. Sabo, J.L. 2014. Predicting the river’s blue line for fish conservation. Proceedings of the National Academy of Sciences of the USA 111: 13686-13687.
  4. Hagen, E.M. and J.L. Sabo. 2014. Temporal variability in insectivorous bat activity along two desert streams with contrasting patterns of prey availability. Journal of Arid Environments 102: 104-112. .
  5. Allen, D.C., K.E. McCluney, S.R. Elser, & J.L. Sabo. 2013. Water as a trophic currency in dryland food webs. Frontiers in Ecology and the Environment, 12: 156-160
  6. Staudt, A., A.K. Leidner, J. Howard, K.A. Brauman, J.S. Dukes, L.J. Hansen, C. Paukert, J.L. Sabo, and L.A. Solórzano. 2013. The added complications of climate change: understanding and managing biodiversity and ecosystems. Frontiers in Ecology and the Environment 11: 494-501.
  7. Cooper, S.D., P.S. Lake, S. Sabater, J.M. Melack, and J.L. Sabo. 2013. The effects of land use changes on streams and rivers in Mediterranean climates. Hydrobiologia 719: 383-425.
  8. Moody, E.K. and J.L. Sabo. 2013. Crayfish impact desert river ecosystem function and litter-dwelling invertebrate communities through association with novel detrital resources. PLoS ONE 8: e63274.
  9. Hagen, E.M. and J.L. Sabo. 2012. Influence of river drying and insect availability on bat activity along the San Pedro River, Arizona (USA). Journal of Arid Environments 84: 1-8.
  10. Hagen, E.M., K.E. McCluney, K.A. Wyant, A.K. Keller, C.U. Soykan, K.C. Wilson, E. Holmes, J.C. Moore, and J.L. Sabo. 2012. Effects of detritus on food chains in marine, freshwater, and terrestrial ecosystems. Oikos 121: 1507-1515.
  11. Sabo, J.L. and E.M. Hagen. 2012. A network theory for resource exchange between rivers and their watersheds. Water Resources Research  48: W04515.
  12. Sabo, J.L., K. Bestgen, W. Graf, T. Sinha, and E.E. Wohl. 2012. Dams in the Cadillac Desert — Downstream Effects in a Geomorphic Context. The  Year in Ecology and Conservation Biology (Proceedings of the New York Academy of Sciences) 1249: 227-246.
  13. McCluney, K.E. and J.L. Sabo. 2012.  River drying lowers the diversity of desert riparian arthropod communities.  Freshwater Biology 57: 91–103.
  14.   Soykan C.U, J.C. Stromberg, L. Ries, C. Hass, A. Brand, D.A. Simmons Jr., W.J.D. Patterson and J.L. Sabo. 2012.  Multitaxonomic Diversity Patterns along a Desert Riparian–Upland Gradient: Is the community more than the sum of its parts?  PLoS ONE 7: e28235. 
  15. Bang, C., Faeth, S.H. and J.L. Sabo.  2012.  Control of arthropod abundance, richness, and composition in a heterogeneous desert city.  Ecological Monographs. 82: 85-100.
  16. Hagen, E.M. and J.L.Sabo2011.  A landscape perspective on bat foraging ecology along rivers: Does channel confinement influence the response of bats to aquatic resources in riverine landscapes? Oecologia 166: 751-760. Hagen & Sabo 2011
  17. McCluney K.E. and J.L. Sabo.  2010.  Tracing Water Sources of Terrestrial Animal Populations with Stable Isotopes: Laboratory Tests with Crickets and Spiders. PLoS ONE 5: e15696. McCluney&Sabo2010
  18. Graf, W.L., Wohl, EE, Sinha T and J.L. Sabo.  2010Sedimentation and sustainability of western American reservoirs.  Water Resources Research 46: W12535.  {Appeared as a featured article} GrafEtAl2010
  19.  Sabo, J.L., T. Sinha, L.C. Bowling, G.H.W. Schoups, W.W. Wallender, M.E. Campana, K.A. Cherkauer, P. Fuller, W.L. Graf, J.W. Hopmans, J.S. Kominoski, C. Taylor, S.W. Trimble, R.H. Webb, E.E. Wohl. 2010.  Reclaiming freshwater sustainability in the Cadillac Desert. Proceedings of the National Academy of Sciences (USA) 107: 21256-21262. {Appeared as a Perspective piece in a special feature on drought in western North America.  Article was covered online: by NY Times, Scientific American, Miller-McCune, and on the air by NPR (KCLU, KNAU, KJZZ)} Cadillac Desert
  20. Sponseller, R.A., A.J. Boulton, J.L. Sabo, and N.B. Grimm. 2010. Responses of macroinvertebrate communities to long-term flow variability in a Sonoran desert stream. Global Change Biology 16: 2891-2900. Sponseller et al. GCB 2010
  21.  Sabo, J.L., J.C. Finlay, D.M. Post, T. Kennedy.  2010.  The role of discharge variation in scaling between drainage area and food chain length in rivers.  Science 330: 965-967. {Article was covered by the UPI and AP and major newspapers and online news services in Canada, US, Spain, India, Pakistan and China} Food Chain Length (Science 2010)
  22. Deviche, P. J., L. Hurley, B. Fokidis, B. Lerbour, Bengt Silverin, Bjorg Silverin, J.L. Sabo, and P. J. Sharp. 2010Acute stress rapidly decreases plasma testosterone but not luteinizing hormone in a free-ranging male songbird: Potential site of action and mechanism.  Gen. Comp. Endocrin. 169:82-90. {JLS assisted with statistical analysis}
  23. Gerber LR,  M. González-Suárez,  C.J. Hernández-Camacho,  J.K. Young, and J.L.  Sabo. 2010. The Cost of Male Aggression and Polygyny in California Sea Lions (Zalophus californianus). PLoS ONE 5: e12230. doi:10.1371/journal.pone.0012230  {JLS assisted with statistical analysis}
  24. Bang C., J.L. Sabo, and S.H. Faeth (2010) Reduced Wind Speed Improves Plant Growth in a Desert City. PLoS ONE 5: e11061. doi:10.1371/journal.pone.0011061
  25. Soykan, C.U. and J.L. Sabo.  2009Spatio-temporal food-web dynamics along a desert riparian-upland transition.  Ecography 32: 354-368. Soykan&Sabo2009
  26. McCluney, K.E. and J.L. Sabo. 2009.  Water availability directly determines interaction strength between riparian predators and prey.  Ecology. 90: 1463–1469. McCluney & Sabo 2009 Ecology  {Highlighted as a Science Editor’s Choice, Science VOL 324, JUNE 19, 2009 p. 1493.} Science Editor’s Choice
  27. Sabo, J.L., J.C. Finlay and D.M. Post.  2009.  Controls of food chain length in freshwater ecosystems.  The Year in Ecology & Conservation Biology. Ann. N.Y. Acad. Sci. 1162: 187–220.
  28. Sabo, J.L., K.E. McCluney, Y.Y. Marusenko, A.C. Keller and C.U. Soykan.  2008.  Greenfall links aquifers to floodplain food webs.  Ecological Monographs 78: 3-18. Sabo et al Greenfall (Ecol Mon 2008)
  29. P. Deviche, J.L. Sabo and P.J. Sharp.  2008. Glutamatergic Stimulation of Luteinising Hormone Secretion in Relatively Refractory Male Songbirds.  Journal of Neuroendrocrinology. 20: 1191–1202. {JLS assisted with statistical analysis}
  30. Sabo, J.L.  2008.  Population viability and species interactions: Life outside the single-species vacuum. Biological Conservation.141: 276-286.
  31. Baxter, P, J.L. Sabo, C. Wilcox, M.A. McCarthy and H. Possingham.  2008.  Cost effective management of an invasive predator.  Conservation Biology 22:89-98.
  32. Sabo, J.L. and D.M. Post.  2008. Quantifying periodic, stochastic and catastrophic variation in the environment.  Ecological Monographs 78: 19-40. {Appeared as a Concepts & Synthesis article} Sabo & Post 2008
  33. Holmes, E.E., Sabo, J.L., Viscido, S. and W.M. Fagan.  2007.  A statistical approach to quasi-extinction forecasting.  Ecology Letters. 10: 1182–1198. {Appeared as a Review & Synthesis article} Holmes et al EcoLetts Review
  34. Sabo, J.L. and L.R. Gerber.  2007.  Predicting extinction risk in spite of predator–prey oscillations.  Ecological Applications 17:1543–1554.
  35. Post, D.M., M.W. Doyle, J.L. Sabo, and J.C. Finlay. 2007.  The problem of boundaries in defining ecosystems: a potential landmine for unifying geomorphology and ecology. Invited special feature article in Geomorphology 89: 11-126. Post et al Geomorphology
  36. Sabo, J.L. and C.U. Soykan.  2006.  Riparian zones increase regional richness by harboring different, not more species: Reply.  Ecology 87: 2128-2134. Sabo&Soykan Reply
  37. Sabo, J.L. 2005.  Stochasticity, predator-prey dynamics and the management of native species threatened by non-native predators.  Ecology 86: 2329-2343. {Appeared as a Concepts & Synthesis article} Sabo 2005 Stochasticity Concepts
  38. Gerber, L.R.  H. McCallum, K.D. Lafferty J.L. Sabo, and A. Dobson. 2005.  Exposing extinction risk analysis to pathogens: Is disease just another form of density dependence?  Ecological Applications 15:1402-1414.
  39. Sabo, J.L., R. Sponseller, M. Dixon, K. Gade, T. Harms, J. Hefernan, A. Jani, G. Katz, C. Soykan, J. Watts, J. Welter. 2005. Riparian zones increase regional richness by harboring different, not more species.  Ecology 86: 56-62. Sabo et al Riparian Richness Metaanalysis
  40. Sabo, J. L. andM. Ku.  2004.  Sceloporus occidentalis (Western Fence Lizard): Failed predation by a snake.  Herpetological Review 35: 396-397.
  41. Sabo, J. L., E. E. Holmes, and P. Kareiva.  2004.  Efficacy of simple viability models in ecological risk assessment: Does density dependence matter?  Ecology 85: 328-341. Sabo et al. Density Dependence and DA
  42. Moore, J.C., D. Callaway, D.C. Coleman, P. de Ruiter, Q. Dong, R. Diaz, A. Hastings, H. W. Hunt, N. Johnson, K. McCann, K. Melville, P. Morin, K. Nadelhoffer, A. Rosemond, D. Post, J. L. Sabo, K. Scow, D. Strong, M. Vanni, and D. Wall.  2004. Detritus, food web dynamics and biodiversity.  Ecology Letters 7: 584-600. Moore et al. Detritus
  43. Sabo, J.L. 2003.  Hot rocks or no hot rocks: Overnight retreat availability and selection by a diurnal lizard.  Oecologia 136: 329-335. Hot Rocks
  44. Sabo, J.L. and M.E. Power. 2002bAggregation of lizards in near-river habitats: Aquatic resource tracking and short-term indirect effects on in situ resources. Ecology 83: 3023-3036. Sabo and Power 2
  45. Sabo, J.L. and M.E. Power. 2002a.  River-watershed exchange: Effects of riverine subsidies on riparian lizards and their terrestrial prey.  Ecology 83: 1860-1869.  Sabo and Power 1 
  46. Bastow, J., J.L. Sabo, J.C. Finlay and M.E. Power. 2002.  The effects of river derived algal and water resources on the spatial distribution of riparian pygmy grasshoppers.  Oecologia 131: 261-268.  Bastow et al. 2002
  47. Sabo, J.L. , J. Bastow and M.E. Power. 2002. Length-weight relationships for adult aquatic insects from a northern California stream.  Journal of the North American Benthological Society. 21: 336-343. Sabo et al. JNABS
  48. Porter, W.P., J.L. Sabo, C.R. Tracy, O.J. Reichman and N. Ramankutty.  2002.  Physiology on a landscape scale: Plant-animal interactions.  Integrative and Comparative Biology 42:431-453.
  49. Sabo, J.L. and G.B. Pauley. 1997. Competition between stream-dwelling cutthroat trout and coho salmon: the evolution of competitive ability.  Canadian Journal of Fisheries and Aquatic Sciences 54: 2609 – 2617. sabo-pauley1997