Andrés López-Sepulcre

Assistant Professor

Publications

Please see current list of publications here

Klarman Hall
E209 Corson Hall
al2365@cornell.edu

Education

Ph.D., University of Jyväskylä, Finland (2007)
B.S., University of Barcelona, Spain (2002)

Departments and programs

Links

Benjamin Houlton

Professor; Ronald P. Lynch Dean of the College of Agriculture and Life Sciences

Publications

Please see a current list of publications here.

Klarman Hall
E334 Corson Hall
bzhoulton@cornell.edu

Education

Postdoctoral Scholar, 2007, Stanford University, Biological Sciences, and Carnegie Institution for Science, Department of Global Ecology

Ph.D., 2005, Princeton University (Ecology and Evolutionary Biology)

M.S., 2000, Syracuse University (Environmental Engineering Science)

B.S., 1998, University of Wisconsin – Stevens Point, College of Natural Resources (Water Chemistry, Chemistry Minor)

Departments and programs

Links

Keywords

Climate Change; Agricultural and Environmental Sustainability; Biogeochemical Cycles; Global Ecology; Carbon Capture and Removal; Planetary Resilience

Meredith Holgerson

Assistant Professor

Publications

For a complete list, please see Google Scholar

  • Holgerson, M.A., A. Duarte, M. Hayes, M. Adams, J. Tyson, K. Douville, and A. Strecker. 2019. Floodplains provide important amphibian habitat despite multiple ecological threats. Ecosphere: e02853.
  • Homan, R.N., M.A. Holgerson, and L.M. Biga. 2018. A long-term demographic study of a spotted salamander (Ambystoma maculatum) population in central Ohio. Herpetologica 74: 109-116.
  • Holgerson, M.A., M.R. Lambert, L.K. Freidenburg, and D.K. Skelly. 2018. Suburbanization alters small pond ecosystems: Shifts in nitrogen and food web dynamics.  Canadian Journal of Fisheries and Aquatic Sciences 75: 641-652.
  • Holgerson, M.A., E. Farr, and P.A. Raymond. 2017. Gas transfer velocities in small forested ponds. Journal of Geophysical Research – Biogeosciences 122: 1011-1021.
  • Holgerson, M.A., C.J. Zappa, and P.A. Raymond. 2016. Substantial overnight reaeration by convective cooling discovered in pond ecosystems. Geophysical Research Letters 43: 8044-8051.
  • Holgerson, M.A., D.M. Post, and D.K. Skelly. 2016. Reconciling the role of terrestrial leaves in pond food webs: A whole-ecosystem experiment. Ecology 97: 1771-1782.
  • Kolozsvary, M.B.= and M.A. Holgerson=. 2016. Creating temporary pools as wetland mitigation: How well do they function?  Wetlands 36: 335-345.
  • Holgerson, M.A. and P.A. Raymond. 2016. Large contribution to inland water CO2 and CH4 emissions from very small ponds. Nature Geoscience 9: 222-226.
  • Holgerson, M.A. 2015. Drivers of carbon dioxide and methane supersaturation in small, temporary ponds. Biogeochemistry 124 (1): 305-318.
  • Atwood, M.A.  2013. Effects of euthanasia method on stable-carbon and stable-nitrogen isotope analysis for an ectothermic vertebrate. Rapid Communications in Mass Spectrometry 27: 909-913.
  • Atwood, M.A.†, J.W. Mora†, and A.W. Kaplan. 2010. Learning to lead: Evaluating leadership and organizational learning. Leadership and Organizational Development Journal 31 (7): 576-595.
  • Homan, R.N., M.A. Atwood†, A.J. Dunkle†, and S.B. Karr†. 2010. Movement orientation by adult and juvenile wood frogs (Rana sylvatica) and American toads (Bufo americanus) over multiple years. Herpetological Conservation and Biology 5 (1): 64-72.
Klarman Hall
E303 Corson Hall
meredith.holgerson@cornell.edu
607/2544210

Education

Ph.D., Yale University, School of Forestry and Environmental Studies (2016)
M.S., SUNY College of Environmental Science and Forestry (2011)
B.S., Denison University (2009)

Departments and programs

Links

Keywords

 

 

Freshwater ecology, ponds and lakes, food webs, community ecology, ecosystem ecology, greenhouse gases, conservation, amphibians

 

Xiangtao Xu

Assistant Professor

Publications

  • Xi Yang, Xiangtao Xu, Atticus Stovall, Min Chen, Jung-Eun Lee. (2021) Recovery: Fast and Slow – vegetation response during the 2012-2016 California Drought. Journal of Geophysical Research-biogeosciences.

  • F. Meunier, H. Verbeeck, B. Cowdery, S. A. Schnitzer, C. M. Smith-Martin, J. S. Powers, X. Xu, M. Slot, H. P. T. De Deurwaerder, M. Detto, D. Bonal, M. Longo, L. S. Santiago, M. Dietze, Unraveling the relative role of light and water competition between lianas and trees in tropical forests: A vegetation model analysis. J. Ecol. 109, 519–540 (2021).

  • S. Wu, J. Wang, Z. Yan, G. Song, Y. Chen, Q. Ma, M. Deng, Y. Wu, Y. Zhao, Z. Guo, Z. Yuan, G. Dai, X. Xu, X. Yang, Y. Su, L. Liu, J. Wu, Monitoring tree-crown scale autumn leaf phenology in a temperate forest with an integration of PlanetScope and drone remote sensing observations. ISPRS J. Photogramm. Remote Sens. 171, 36–48 (2021).

  • X. Xu, A. G. Konings, M. Longo, A. Feldman, L. Xu, S. Saatchi, D. Wu*, J. Wu, P. Moorcroft, Leaf surface water, not plant water stress, drives diurnal variation in tropical forest canopy water content. New Phytol. (2021), doi:10.1111/nph.17254.

  • X. Xu, A. T. Trugman, Trait-Based Modeling of Terrestrial Ecosystems: Advances and Challenges Under Global Change. Curr. Clim. Chang. Reports, 1–13 (2021).

  • D. Wu*, S. Piao, D. Zhu, X. Wang, P. Ciais, A. Bastos, X. Xu, W. Xu, Accelerated terrestrial ecosystem carbon turnover and its drivers. Glob. Chang. Biol. 26, 5052–5062 (2020).

  • M. Detto, X. Xu, Optimal leaf life strategies determine Vc,max dynamic during ontogeny. New Phytol. 228, 361–375 (2020).

  • J. S. Powers, G. Vargas G., T. J. Brodribb, N. B. Schwartz, D. Pérez-Aviles, C. M. Smith-Martin, J. M. Becknell, F. Aureli, R. Blanco, E. Calderón-Morales, J. C. Calvo-Alvarado, A. J. Calvo-Obando, M. M. Chavarría, D. Carvajal-Vanegas, C. D. Jiménez-Rodríguez, E. Murillo Chacon, C. M. Schaffner, L. K. Werden, X. Xu, D. Medvigy, A catastrophic tropical drought kills hydraulically vulnerable tree species. Glob. Chang. Biol. 26, 3122–3133 (2020).

  • C. M. Smith-Martin, X. Xu, D. Medvigy, S. A. Schnitzer, J. S. Powers, Allometric scaling laws linking biomass and rooting depth vary across ontogeny and functional groups in tropical dry forest lianas and trees. New Phytol. 226, 714–726 (2020).

  • J. H. Levy-Varon, S. A. Batterman, D. Medvigy, X. Xu, J. S. Hall, M. van Breugel, L. O. Hedin, Tropical carbon sink accelerated by symbiotic dinitrogen fixation. Nat. Commun. 10, 5637 (2019).

  • D. Medvigy, G. Wang, Q. Zhu, W. J. Riley, A. M. Trierweiler, B. G. Waring, X. Xu, J. S. Powers, Observed variation in soil properties can drive large variation in modelled forest functioning and composition during tropical forest secondary succession. New Phytol. 223, 1820–1833 (2019).

  • Xu, X., Medvigy, D., Trugman, A.T., Guan, K., Good, S.P. & Rodriguez-Iturbe, I. (2018) Tree cover shows strong sensitivity to precipitation variability across the global tropics. Global Ecology and Biogeography, 27, 450–460.
  • Wang, X., Wu, J., Chen, M., Xu, X., Wang, Z., Wang, B., Wang, C., Piao, S., Lin, W., Miao, G., Deng, M., Qiao, C., Wang, J., Xu, S. & Liu, L. (2018) Field evidence for the positive effects of aerosols on tree growth. Global Change Biology. (published online)
  • Fisher, R.A., Koven, C.D., Anderegg, W.R.L., Christoffersen, B.O., Dietze, M.C., Farrior, C.E., Holm, J.A., Hurtt, G.C., Knox, R.G., Lawrence, P.J., Lichstein, J.W., Longo, M., Matheny, A.M., Medvigy, D., Muller-Landau, H.C., Powell, T.L., Serbin, S.P., Sato, H., Shuman, J.K., Smith, B., Trugman, A.T., Viskari, T., Verbeeck, H., Weng, E., Xu, C., Xu, X., Zhang, T. & Moorcroft, P.R. (2018) Vegetation demographics in Earth System Models: A review of progress and priorities. Global Change Biology, 24, 35–54.
  • McDowell, N., Allen, C.D., Anderson-Teixeira, K., Brando, P., Brienen, R., Chambers, J., Christoffersen, B., Davies, S., Doughty, C., Duque, A., Espirito-Santo, F., Fisher, R., Fontes, C.G., Galbraith, D., Goodsman, D., Grossiord, C., Hartmann, H., Holm, J., Johnson, D.J., Kassim, A.R., Keller, M., Koven, C., Kueppers, L., Kumagai, T., Malhi, Y., McMahon, S.M., Mencuccini, M., Meir, P., Moorcroft, P., Muller-Landau, H.C., Phillips, O.L., Powell, T., Sierra, C.A., Sperry, J., Warren, J., Xu, C. & Xu, X. (2018) Drivers and mechanisms of tree mortality in moist tropical forests. New Phytologist, 219, 851–869.
  • Xu, X., Medvigy, D., Joseph Wright, S., Kitajima, K., Wu, J., Albert, L.P., Martins, G.A., Saleska, S.R. & Pacala, S.W. (2017) Variations of leaf longevity in tropical moist forests predicted by a trait-driven carbon optimality model. Ecology Letters, 20, 1097–1106.
  • Wu, J., Serbin, S.P., Xu, X., Albert, L.P., Chen, M., Meng, R., Saleska, S.R. & Rogers, A. (2017) The phenology of leaf quality and its within-canopy variation is essential for accurate modeling of photosynthesis in tropical evergreen forests. Global Change Biology, 23, 4814–4827.
  • Allen, K., Dupuy, J.M., Gei, M.G., Hulshof, C., Medvigy, D., Pizano, C., Salgado-Negret, B., Smith, C.M., Trierweiler, A., Van Bloem, S.J., Waring, B.G., Xu, X. & Powers, J.S. (2017) Will seasonally dry tropical forests be sensitive or resistant to future changes in rainfall regimes? Environmental Research Letters, 12, 023001.
  • Xu, X., Medvigy, D., Powers, J.S., Becknell, J.M. & Guan, K. (2016) Diversity in plant hydraulic traits explains seasonal and inter-annual variations of vegetation dynamics in seasonally dry tropical forests. The New phytologist, 212, 80–95.
  • Oh, Y., Stackhouse, B., Lau, M.C.Y., Xu, X., Trugman, A.T., Moch, J., Onstott, T.C., Jørgensen, C.J., D’Imperio, L., Elberling, B., Emmerton, C.A., St. Louis, V.L. & Medvigy, D. (2016) A scalable model for methane consumption in arctic mineral soils. Geophysical Research Letters, 43, 5143–5150.
  • Trugman, A.T., Fenton, N.J., Bergeron, Y., Xu, X., Welp, L.R. & Medvigy, D. (2016) Climate, soil organic layer, and nitrogen jointly drive forest development after fire in the North American boreal zone. Journal of Advances in Modeling Earth Systems, 8, 1180–1209.
  • Xu, X., Medvigy, D. & Rodriguez-Iturbe, I. (2015) Relation between rainfall intensity and savanna tree abundance explained by water use strategies. Proceedings of the National Academy of Sciences, 112, 12992–12996.
  • Wang, X., Piao, S., Xu, X., Ciais, P., Macbean, N., Myneni, R.B. & Li, L. (2015) Has the advancing onset of spring vegetation green-up slowed down or changed abruptly over the last three decades? Global Ecology and Biogeography, 24, 621–631.
  • Xu, X., Piao, S., Wang, X., Chen, A., Ciais, P. & Myneni, R.B. (2012) Spatio-temporal patterns of the area experiencing negative vegetation growth anomalies in China over the last three decades. Environmental Research Letters, 7, 035701.
Klarman Hall
E317 Corson Hall
xx286@cornell.edu

Education

Ph.D. Princeton University (2017)
B.S. Peking University (2012)

Departments and programs

Links

Keywords

 

 

ecosystem ecology, quantitative ecology, global change ecology, plant functional diversity, vegetation modeling, plant hydraulics, canopy phenology

 

Peter McIntyre

Associate Professor; Dwight Webster Sesquicentennial Faculty Fellow

Publications

  • Fluet-Chouinard E, Funge-Smith S & McIntyre PB. 2018. Global hidden harvest of freshwater fish revealed by household surveys. Proceedings of the National Academy of Sciences of the United States of America 115: 7623-7628.
  • Lisi PJ, Childress E, Gagne RB, Hain EF, Hogan JD, Gilliam JF, Blum MJ, & McIntyre PB. 2018. Overcoming urban stream syndrome: trophic flexibility confers resilience among Hawaiian stream fishes. Freshwater Biology 63: 492-502.
  • Magee M, McIntyre PB, & Wu C. 2018. Modeling oxythermal stress for cool-water fishes in lakes using a cumulative dosage approach. Canadian Journal of Fisheries & Aquatic Sciences 75: 1303-1312.
  • Milt A, Diebel M, Doran P, Ferris M, Herbert M, Khoury M, Moody A, Neeson T, Ross J, Treska T, O'Hanley J., Walter L, Wangen S, Yacobson E, & McIntyre PB. 2018. Minimizing opportunity costs to aquatic connectivity restoration while controlling invasive species. Conservation Biology 32: 894-904.
  • Neeson TM, Moody AT, O'Hanley JR, Diebel MW, Doran PJ, Ferris MC, Colling T, & McIntyre PB. 2018. Aging infrastructure creates opportunities for cost-efficient restoration of aquatic ecosystem connectivity. Ecological Applications, in press. 
  • Stevens A, Baird I, & McIntyre PB. 2018. Fish consumption preferences create differential mercury exposure among Wisconsin anglers. Fisheries 43: 31-41.
  • White CH, Heidinger AK, Ackerman SA, & Mcintyre PB. 2018. A long-term fine-resolution record of AVHRR surface temperatures for the Laurentian Great Lakes. Remote Sensing 10: 1210.
  • Hermoso V, Januchowski-Hartley S, Linke S, Dudgeon D, Petry P, & McIntyre PB. 2017. Optimal allocation of species assessments to guide conservation of biodiversity in a rapidly changing world. Global Change Biology 23: 3525-3532.
  • Koning AA, Moore J, Suttidate N, Hannigan R, & McIntyre PB. 2017. Intensification of swidden agriculture leads to eutrophication of Southeast Asian rivers. Ecosystems 20: 393-405.
  • Kraemer BK, Chandra S, Dell A, Dix M, Kuusisto E, Livingstone D, Schladow G, Silow E, Sitoki L, Tamatamah R & McIntyre PB. 2017. Global patterns in lake ecosystem responses to warming based on the temperature dependence of metabolism. Global Change Biology 23: 1881-1890.
  • Moody AT, Neeson TM, Wangen S, Dischler J, Diebel MW, Herbert M, Khoury M, Yacobson E, Doran PJ, Ferris MC, O'Hanley JR, & McIntyre PB. 2017. Pet project or best project? Online decision support tools for prioritizing barrier removals in the Great Lakes and beyond. Fisheries 42: 57-65.
  • Childress E & McIntyre PB. 2016. Life history traits modulate ecosystem-level effects of nutrient subsidies from fish migrations. Ecosphere 7: e01301.
  • Cohen AS, Gergurich EL, Kraemer BM, McGlue MM, McIntyre PB, Russell JM, Simmons JD, & Swarzenski PW. 2016. Climate warming reduces fish production and benthic habitat in Lake Tanganyika, one of the world’s most biodiverse freshwater ecosystems. Proceedings of the National Academy of Sciences of the United States of America 113: 9563–9568.
  • Mason LA, Riseng CM, Gronewold AD, Rutherford ES, Wang J, Clites A, Smith SDP, & McIntyre PB. 2016. Fine-scale spatial variation in ice cover and surface temperature trends across the surface of the Laurentian Great Lakes. Climatic Change 138: 71-83.
  • McIntyre PB, Reidy Liermann C, & Revenga C. 2016. Linking freshwater fishery management to global food security and biodiversity conservation. Proceedings of the National Academy of Sciences of the United States of America 113: 12880-12885.
  • Vanni MJ & McIntyre PB. 2016. Predicting nutrient excretion rates of aquatic animals using metabolic ecology and ecological stoichiometry: a global synthesis. Ecology  97: 3460-3471.
  • Winemiller KO, McIntyre PB, & 39 others. 2016. Balancing hydropower and biodiversity in the Amazon, Congo and Mekong. Science 351: 128-129.
  • Neeson TM, Ferris MC, Diebel MW, Doran PJ, O’Hanley JR, & McIntyre PB. 2015. Enhancing ecosystem restoration efficiency through spatial and temporal coordination. Proceedings of the National Academy of Sciences of the United States of America 112: 6236–6241.
  • O’Reilly CM, et al. 2015. Rapid and highly variable warming of lake surface waters around the globe. Geophysical Research Letters 42 doi:10.1002/2015GL066235.
  • Hogan JD, Blum MJ, Gilliam JF, Bickford N, & McIntyre PB. 2014. Consequences of alternative dispersal strategies in a putatively amphidromous fish. Ecology 95: 2397-2408.
  • Allan JD*, McIntyre PB*, Smith SDP, Halpern BS, & 18 coauthors. 2013. Joint analysis of stressors and ecosystem services to enhance restoration effectiveness. Proceedings of the National Academy of Sciences of the United States of America 110: 372-377.
  • Januchowski-Hartley S, McIntyre PB, Diebel M, & Doran PJ. 2013. Restoring aquatic ecosystem connectivity requires expanding inventories of both dams and road crossings. Frontiers in Ecology & Environment 11: 211-217.
  • Pracheil BM, McIntyre PB, & Lyons JD. 2013. Enhancing conservation of large-river biodiversity by accounting for tributaries. Frontiers in Ecology & Environment 11: 124-128.
  • Vadeboncoeur Y, McIntyre PB, & Vander Zanden MJ. 2011. Borders of biodiversity: life at the edge of the world's Great Lakes.  BioScience 61: 526-537.
  • Vörösmarty CJ, McIntyre PB, Gessner MO, Dudgeon D, Prusevich A, Green P, Glidden S, Bunn SE, Sullivan CA, Reidy Liermann C, & Davies PM. 2010. Global threats to human water security and river biodiversity. Nature 467: 555-561.
  • Arnegard ME, McIntyre PB, Harmon LJ, Zelditch ML, Crampton WGR, Davis JK, Sullivan JP, Lavoué S, & Hopkins CD. 2010. Sexual signal evolution outpaces ecological divergence during electric fish species radiation. American Naturalist 176: 335–356.
  • McIntyre PB, Flecker A, Vanni M, Hood J, Taylor B & Thomas S. 2008. Fish distributions and nutrient recycling in a tropical stream: can fish create biogeochemical hotspots? Ecology 89: 2335-2346.
  • McIntyre PB, Jones L, Flecker A, & Vanni M. 2007. Fish extinctions alter nutrient recycling in tropical freshwaters. Proceedings of the National Academy of Sciences of the United States of America 104: 4461-4466.
Klarman Hall
Fernow Hall
pbm3@cornell.edu

Education

  • B.A. 1998 Harvard University, Biology
  • Ph.D. 2006 Cornell University, Ecology & Evolutionary Biology

Departments and programs

Links

Keywords

Fisheries, food webs, climate change, ecological stoichiometry, global biodiversity, conservation planning, river networks, life history and migration

Jed P. Sparks

Professor

Publications

  • Yi, C., D. E. Anderson, A. A. Turnipseed, S. P. Burns, J. P. Sparks, D. I. Stannard, and R. K. Monson.  The contribution of advective fluxes to net ecosystem CO2 exchange in a high-elevation, subalpine fores.  Ecological Applications.
  • McCalley, C. K.* and J. P. Sparks. Controls over NO and NH3 emissions from Mojave Desert soils. Oecologia.
  • Johnson E. G., J.P. Sparks, B. Dzikovski, B.R. Crane, D.M. Gibson, and R. Loria. Plant-pathogenic Streptomyces species produce nitric oxide synthase derived nitric oxide in response to host signals.  Chemistry & Biology 15(1):43-50.
  • Vallano, D.M.* and J.P. Sparks. Quantifying foliar uptake of gaseous nitrogen dioxide using enriched foliar d15N values. New Phytologist 177:946-955.
  • Sparks, J. P., A. J. Walker, A. A. Turnipseed, and A. Guenther.  Dry nitrogen deposition estimates over a forest experiencing free air CO2 enrichment.  Global Change Biology. 14(4):768-781.
  • Joshi, M.V., D.R.D Bignell, E.G. Johnson, J. P. Sparks, D.M. Gibson, R. Loria.  The AraC/XylS regulator TxtR modulates thaxtomin biosynthesis and virulence in Streptomyces scabies. Molecular Microbiology 66(3):633-642.
  • Derry, L. A., J. P. Sparks and S. Chandra. Ge/Si fractionation by higher plants: mechanisms and applications to biogeochemical cycles.  Geochemica et Cosmochimica Acta 71(15):A219-A219 Suppl. S.
  • Canny, M. J., J. P. Sparks, C. X. Huang, and M. L. Roderick.  Air embolisms exsolving in the transpiration water – the effect of constrictions in the xylem pipes.  Functional Plant Biology 34(2):95-111.
  • Sparks, J. P.  Enhancing the efficiency of nitrogen utilization in plants.  The Quarterly Review of Biology. 82(4): Page 422–422,
  • Vallano, D. M.* and J. P. Sparks.  Foliar 15N signatures as indicators of foliar uptake of atmospheric nitrogen pollution.  In:  Stable Isotopes as Indicators of Environmental Changes, T. E. Dawson (ed.).  pp. 93-109. Academic Press.
  • Eller, A. S. D.* and J. P. Sparks.  Predicting leaf-level fluxes of ozone and nitrogen dioxide:  The relative roles of diffusion and biochemical processes.  Plant, Cell, and Environment 29(9):1742‑1750.
  • Teklemariam, T. A.* and J. P. Sparks.  Leaf fluxes of NO and NO2 in four herbaceous plant species:  The role of ascorbic acid.  Atmospheric Environment 40(12):2235‑2244.
  • Turnipseed, A. A., L. G. Huey, E. Nemitz, R. Stickel, J. Higgs, D. J. Tanner, D. L. Slusher, J. P. Sparks, F. Flocke, and A. Guenther.  Eddy covariance fluxes of Peroxyacetyl nitrates (PANs) and NOy to a coniferous forest.  Journal of Geophysical Research-Atmospheres 111:D09304, doi:10.1029/2005JD006631.
  • Holland, E. A., S. B. Bertman, M. A. Carroll, A. B. Guenther, P. B. Shepson, J. P. Sparks, and J. Lee-Taylor.  U.S. nitrogen science plan focuses collaborative efforts.  EOS 86(27):253-260.
  • Monson, R. K., J. P. Sparks, T. N. Rosenstiel, L. E. Scott-Denton, T. E. Huxman, P. C. Harley, A. A. Turnipseed, S. P. Burns, B. Backlund, and J. Hu.  Climatic influences on net ecosystem CO2 exchange during the transition from wintertime carbon source to springtime carbon sink in a high-elevation, subalpine forest.  Oecologia 146(1):130-147.
  • Althoff, D. M., K. A. Segraves, and J. P. Sparks.  Characterizing the interaction between the bogus yucca moth and yuccas:  Do bogus yucca moths impact yucca reproductive success?  Oecologia 140(2):321‑327.
  • Angeles, G., B. Bond, J. S. Boyer, T. Brodribb, J. R. Brooks, M. J. Burns, J. Cavender‑Bares, M. Clearwater, H. Cochard, J. Comstock, S. D. Davis, J. C. Domec, L. Donovan, F. Ewers, B. Gartner, U. Hacke, T. Hinckley, N. M. Holbrook, H. G. Jones, K. Kavanagh, B. Law, J. Lopez-Portillo, C. Lovisolo, T. Martin, J. Martinez-Vilalta, S. Mayr, F. C. Meinzer, P. Melcher, M. Mencuccini, S. Mulkey, A. Nardini, H. S. Neufeld, J. Passioura, W. T. Pockman, R. B. Pratt, S. Rambal, H. Richter, L. Sack, S. Salleo, A. Schubert, P. Schulte, J. P. Sparks, J. Sperry, R. Teskey, and M. Tyree.  The cohesion-tension theory.  New Phytologist 163(3):451‑452.
  • Sparks, J. P.  Plant uptake of reactive nitrogen.  In:  Studying Forest Canopies from Above:  The International Canopy Crane Network, Y. Basset, V. Horlyck, and J. Wright (eds.).  UNEP & Smithsonian Institution.  ISBN 9962-614-05-8.
  • Sparks, J. P.  Photosynthesis and autotrophic energy flows.  In:  Encyclopedia of Energy, C. S. Cleveland (ed.).  Elsevier, Inc., New York, volume 5, pp. 9-16.
  • Sparks, J. P.  The herbaceous layer in forests of Eastern North America.  The Quarterly Review of Biology 79(3):324.
  • Teklemariam, T. A.* and J. P. Sparks.  Gaseous fluxes of peroxyacetyl nitrate (PAN) into plant leaves.  Plant, Cell, and Environment 27(9):1149-1158.
Klarman Hall
E409A Corson Hall
jps66@cornell.edu
607/5928112

Education

Ph.D., Washington State University (1998)

B.S., University of Utah (1994)

 

Departments and programs

Links

Keywords

Biogeochemistry, plant ecology, biogeochemistry, stable isotopes

Robert Warren Howarth

David R. Atkinson Professor of Ecology and Environmental Biology

Publications

For a current publications list, visit our lab website.

 

Klarman Hall
E311 Corson Hall
howarth@cornell.edu

Education

Ph.D., Massachusetts Institute of Technology and Woods Hole Oceanographic Institution (1979)

B.A., Amherst College (1974)

Departments and programs

Links

Keywords

Marcellus shale, ecosystem science, biogeochemistry, aquatic ecology, oceanography, earth systems science

 

Christine L Goodale

Frank H.T. Rhodes Professor of Environmental Science

Publications

  • Lovett, GM, CL Goodale, SV Ollinger, CB Fuss, AP Ouimette, and GE Likens. 2018. Nutrient retention during ecosystem succession:  a revised conceptual model. Frontiers in Ecology and the Environment.
  • Goodale, CL. 2017. Multi-year fate of a 15N tracer in a mixed deciduous forest: retention, redistribution, and differences by mycorrhizal association. Global Change Biology 23(2):867-880.
  • Greaver TL, CM Clark, JE Compton, D Vallano, AF Talhelm, CP Weaver, LE Band, JS Baron, EA Davidson, CL Tague, E Felker-Quinn, JA Lynch, JD Herrick, L Liu, CL Goodale, KJ Novak, and RA Haeuber. 2016. Key ecological responses to nitrogen are altered by climate change. Nature Climate Change 6: 836–843.
  • Goodale, CL, G Fredriksen, *MS Weiss, CE McCalley, JP Sparks, and SA Thomas. 2015. Soil processes drive seasonal variation in retention of 15N tracers in a deciduous forest catchment. Ecology 96(10):2653-2668.
  • ᶲWexler, S, CL Goodale, K McGuire, SW Bailey, and PM Groffman. 2014. Isotopic signals of summer denitrification in a northern hardwood forested catchment. Proceedings of the National Academy of Sciences - USA 411(46):16413-16418.
  • *Thomas, RQ, S Zaehle, P Templer, and CL Goodale. 2013. Global patterns of nitrogen limitation: confronting two global biogeochemical models with observations. Global Change Biology 19(10):2986-2998.
  • *Melvin, AM, JW Lichstein, and CL Goodale. 2013. Forest liming increases forest floor carbon and nitrogen stocks in a mixed hardwood forest.  Ecological Applications 23(8):1962-1975.
  • Pinder, RW, EA Davidson, CL Goodale, TL Greaver, JD Herrick, and L Liu. 2012. Climate change impacts of US reactive nitrogen. Proceedings of the National Academy of Sciences of the United States of America. 109(20):7671-7675.
  • Templer, PH, RW Pinder, and CL Goodale. 2012. Impacts of nitrogen deposition on greenhouse gas fluxes for terrestrial ecosystems of North America.  Frontiers in Ecology and the Environment 10(10):547-553.
  • Lovett, GM, and CL Goodale. 2011. A new conceptual model of nitrogen saturation based on experimental nitrogen addition to an oak forest. Ecosystems 14:615-631.
  • *Thomas, RQ, CD Canham, KC Weathers, and CL Goodale. 2010. Increased tree carbon storage in response to nitrogen deposition in the US.  Nature Geoscience 3:13-17.

(* = graduate student, ᶲ = postdoctoral associate in research group)

Klarman Hall
E215 Corson Hall
clg33@cornell.edu
607/254-4211

Education

Postdoctoral Scientist, The Woods Hole Research Center (2001-2003)

Postdoctoral Fellow, Carnegie Institution of Washington, Stanford (1999-2001)

Ph.D., University of New Hampshire (1999)

M.S., University of New Hampshire (1995)

B.A., Dartmouth College (1992)

Departments and programs

Links

Keywords

Acid deposition, biogeochemistry, carbon cycle, climate change, ecosystem ecology, forest ecosystems, land-use change, nitrogen retention, watersheds

Alexander S Flecker

Professor

Publications

  • Hammerschlag, N., O.J. Schmitz, A.S. Flecker, K. Lafferty, A. Sih, T.B. Atwood, A.J. Gallagher, D.J. Irschick, R. Skubel, and S.J. Cooke. 2019. Ecosystem function and services of aquatic predators in the Anthropocene. Trends in Ecology and Evolution 34(4):369-383
  • Simon, T., A. Binderup, A. Flecker, J. Gilliam, M. Marshall, S. Thomas, J. Travis, D. Reznick, and C. Pringle. 2019. Landscape patterns in top-down control of decomposition: omnivorous fish decouples a detrital-based trophic cascade. Ecology
  • Carvalho, D.R., A.S. Flecker, C.B.M. Alves, J.P. SParks, and P.S. Pompeu. 2019. Trophic responses to aquatic pollution of native and exotic livebearers fishes. Science of the Total Environment 681:503-515
  • Rosero-López, D., M.T. Walter, A.S. Flecker, P. Llorte, B. De Biévre, D.P. González-Zeas, R. Calvez, and O. Dangles. 2019. Streamlined eco-engineering approach helps define environmental flows for tropical Andean headwaters. Freshwater Biology 64:1315-1325
  • Polato, N.R., B.A. Gill, A.A. Shah, M.M. Gray, K.L. Casner, A Barthelet, P.W. Messer, M. Simmons, J.M. Guayasamin, A.C. Encalada, B.C. Kondratieff, A.S. Flecker, A.A. Thomas, C.K Ghalambor, N.L. Poff, W.C. Funk, and K.R. Zamudio. 2018. Narrow thermal tolerance and low dispersal drive higher speciation in tropical mountains. Proceedings of the National Academy of Sciences 115: 12471-12476
  • Wu, X., J. Gomes-Selman, Q. Shi, Y. Xue, R. García-Villacorta, E. Anderson, S. Sethi, S. Steinschneider, A. Flecker, and C.P. Gomes.   2018.  Efficiently approximating the Pareto Frontier: hydropower dam placement in the Amazon Basin.  Proc. 32nd AAAI Conference on Artificial Intelligence.
  • Shi, Q., J.M. Gomes-Selman, R. García-Villacorta, S. Sethi, A.S. Flecker, and C.P. Gomes. 2018. Efficiently optimizing for dendritic connectivity on tree-structured networks in a multi-objective framework. Submitted to: Proceedings of ACM Conference on Computing and Sustainable Societies. COMPASS 2018: 26:1-26:8; https://doi.org/10.1145/3209811.3209878. 
  • Larson, E.I., N.L. Poff, C.L. Atkinson, and A.S. Flecker.  2018.  Extreme flooding decreases stream consumer autochthony by increasing detrital resource availability.  Freshwater Biology.  https://doi.org/10.1111/fwb.13177. 
  • Dalton, C.M., K.E. Tracy, N.G. Hairston, Jr., and A.S. Flecker.  2018.  Disentangling the roles of predation risk and food deprivation in the nitrogen metabolism of consumers.  Ecology 99: 681–689; doi: 10.1002/ecy.2132.
  • Poff, N.L., E. Larson, P. Salerno, S. Morton, B. Kondratieff, A. Flecker, K. Zamudio, W.C. Funk.   2018.  Extreme streams: Species persistence mechanisms and evolutionary change in montane stream insect populations across a flood disturbance gradient.  Ecology Letters doi:10.1111/ele.12918.
  • Atkinson, C.L., A. Encalada, A. Rugenski, S. Thomas, A. Landeira-Dabarca, L. Poff, and A. Flecker.  2018.  Determinants of food resource assimilation by stream insects along a tropical elevation gradient.  Oecologia. 187:731-744. doi: 10.1007/s00442-018-4142-2. 
  • Vanni, M., et al.  2017.  A global database of nitrogen and phosphorus excretion rates of aquatic animals. Ecology DOI: 10.1002/ecy.1792.
  • Alexiades, A.V., A.S. Flecker, and C.E. Kraft.   2017.  Nonnative fish stocking alters stream ecosystem nutrient dynamics.   Ecological Applications 27:956-965. DOI: 10.1002/eap.1498.
  • Rubio-Gracia, F., et al.  2017. Combined effects of hydrologic alteration and cyprinid fish in mediating biogeochemical processes in a Mediterranean stream.  Science of the Total Environment 601–602 (2017) 1217–1225.  DOI:10.1016/j.scitotenv.2017.05.287.
  • Zandonà, E., C. Dalton, R. El-Sabaawi, J. Howard, M. Marshall, S. Kilham, D. Reznick, J. Travis, T.  Kohler, A. Flecker, S. Thomas, and C. Pringle.  2017.  Population variation in the trophic niche of the Trinidadian guppy from different predation regimes.  Scientific Reports 7: 5770; DOI:10.1038/s41598-017-06163-6
  • Boyero, L., et al.  2017.  Riparian plant litter quality increases with latitude.  Scientific Reports 7: 10562; DOI:10.1038/s41598-017-10640-3.  
  • Norman, B., et al.  2017.  Drivers of nitrogen transfer efficiencies in stream food webs across continents. Ecology 98: 3044–3055; DOI: 10.1002/ecy.2009.
  • Twining, C.W., D.C. Josephson, C.E. Kraft, J.T. Brenna, P. Lawrence, and A.S. Flecker.  2017.  Limited seasonal variation in food quality and foodweb structure in an Adirondack stream: insights from fatty acids. Freshwater Science 36:877-892. 
  • Shah, A., B. Gill, A. Encalada, A. Flecker, C. Funk, J. Guayasamin, B. Kondratieff, N.L. Poff, S. Thomas, K. Zamudio, and C. Ghalambor.  2017. Climate variability predicts thermal limits of aquatic insects across elevation and latitude.   Functional Ecology 31:2118-2127; doi: 10.1111/1365-2435.12906. 
  • Boyero, L., et al. 2016.  Biotic and abiotic variables influencing plant litter breakdown in streams: a global-scale study. Proceedings of the Royal Society B. 283:20152664; DOI: 10.1098/rspb.2015.2664.
  • Gill, B., B. Kondratieff, K. Casner, A.Encalada, A. Flecker, D. Gannon, C. Ghalambor, J. Guayasamin, L. Poff, M. Simmons, S. Thomas, K. Zamudio, and W.K. Funk.  2016.  Cryptic species diversity reveals biogeographic support for the ‘Mountain passes are higher in the tropics Hypothesis’. Proceedings of the Royal Society B 283: 20160552; DOI: 10.1098/rspb.2016.0553.   
  • Buchanan, B.P., D.A. Auerbach, R.A. McManamay, A.S. Flecker, J. Taylor, J A. Archibald, D.G. Fuka, and M.T. Walter.   2016.   Environmental flows in the context of unconventional natural gas development in the Marcellus Shale.  Ecological Applications 27: 37-55. DOI: 10.1002/eap.1425
  • Collins, S.M., S.A. Thomas, T. Heatherly II, K.L. MacNeill, A. Leduc, A. López-Sepulcre, B. Lamphere, R.W. El-Sabaawi, D.N. Reznick, C.M. Pringle, and A.S. Flecker.  2016. Fish introductions and light modulate food web fluxes in tropical streams: a whole-ecosystem experimental approach. Ecology 97: 3154–3166; DOI: 10.1002/ecy.1530.
  • Lessmann, J., et al.  2016.   Freshwater vertebrate and invertebrate diversity patterns in an Andean-Amazon basin: implications for conservation efforts. Neotropical Biodiversity 2: 99-114, DOI: 10.1080/23766808.2016.1222189
  • Auerbach, D. A., B.P. Buchanan, A.V. Alexiades, E.P. Anderson, A.C. Encalada, E.I. Larson, R.A. McManamay, G.L. Poe, M.T. Walter, and A.S. Flecker.  2016. Towards catchment classification in data-scarce regions.  Ecohydrology 9: 1235-1247. doi: 10.1002/eco.1721. 
  • Bassar, R.D., T. Heatherly II, M.C. Marshall, S.A. Thomas, A.S. Flecker, and D.N. Reznick.  2015. Population size structure dependent fitness and ecosystem consequences in Trinidadian guppies.   Journal of Animal Ecology 84: 955–968.  doi: 10.1111/1365-2656.12353.
  • Collins, S.M., T.J. Koher, S.A. Thomas, W.W. Fetzer and A.S. Flecker.  2015.  The importance of terrestrial subsidies in stream food webs varies along a stream size gradient. Oikos doi:10.1111/ oik.07213.
  • Twining, C.W., J.T. Brenna, N.G. Hairston Jr., and A.S. Flecker.  2015.  Highly unsaturated fatty acids in nature: what we know and what we need to learn.  Oikos 125: 749-760. doi: 10.1111/oik.02910.
  • Dodds, W. K., et al.  2014.  You are not always what we think you eat: selective assimilation across multiple whole-stream isotopic tracer studies. Ecology 95:2757-2767.
  • Capps, K. A., and A. S. Flecker. 2013. Invasive aquarium fish transform ecosystem nutrient dynamics.  Proceedings of the Royal Society B 280: 20131520. doi: 10.1098/rspb.2013.1520.
Klarman Hall
E211 Corson Hall
asf3@cornell.edu
607/254-4263

Education

Ph.D., Zoology, University of Maryland (1990)

M.S., Zoology, University of Maryland (1984)

B.S, Zoology, Oregon State University (1980)

Departments and programs

Links

Keywords

 

 

Food webs, tropical stream ecosystems, ecosystem engineers, ecological stoichiometry, ecosystem subsidies, eco-evolutionary interactions, fishes, biogeochemistry, biodiversity and ecosystem function

 

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