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Ishi Buffam

Ishi Buffam
Researcher and teacher in ecosystem ecology.

Presentation

I am an Ecosystem Ecologist, with a PhD in Forest Ecology from the Swedish University of Agricultural Sciences (SLU).  My training is in aquatic chemistry and biogeochemistry, with a primary focus on carbon and nitrogen transformations and hydrological transport within watersheds and stream networks.

Teaching

I have designed and taught courses in Ecosystem Ecology, Aquatic Ecology, Stream Ecosystems, Water Resources, and Global Change. Currently at SLU I teach in courses on Climate Change and Challenges of the City.

Research

My group’s current research projects involve:  climate change and freshwater ecosystem carbon cycling, biogeochemistry of urban aquatic ecosystems, and ecosystem services provided by urban green spaces. Many of our current projects are centered around quantifying ecosystem services and potential disservices associated with green (vegetated) roofs. Green roofs are known to intercept and reduce runoff during rain events, to reduce the urban heat island effect, and to function as good insulators thus saving heating/cooling energy. But, little is known about the direct biogeochemical functions of green roofs, for example: What capacity do green roofs have for carbon sequestration, nutrient retention, or greenhouse gas exchange? Or, do they function as a source of nutrients and greenhouse gases, and if so – how can they be designed to minimize these dis-services? And, what are the key climate, geophysical, and biological factors that control nutrient cycling in these novel urban ecosystems?

Selected publications

For a full list see: Ishi Buffam on ResearchGate

Berberich, M., J.J. Beaulieu, T.L. Hamilton, S. Waldo and I. Buffam. 2019. Spatial variability of sediment methane production and methanogen communities within a eutrophic reservoir: importance of organic matter source and quantity. Limnology and Oceanography. doi: 10.1002/lno.11392.

Audet, J.; Bastviken, D.; Bundschuh, M.; Buffam, I.; Feckler, A.; Klemedtsson, L.; Laudon, H.; Löfgren, S.; Natchimuthu, S.; Öquist, M.; Peacock, M.; Wallin, M. 2019. Forest streams are important sources for nitrous oxide emissions. Global Change Biology. doi: 10.1111/gcb.14812.

Goldschmidt, A. and I. Buffam. 2018. Biochar improves runoff water quality from green roof plots. Cities Alive Conference Proceedings, 20 pp.

Mitchell, M.E., T. Hamilton, C. Uebel, K. Hopfensperger, and I. Buffam. 2018. Nitrogen cycling players and processes in green roof ecosystems. Applied Soil Ecology. doi: 10.​1016/​j.​apsoil.​2018.​08.​007.

Alberts, J.M., K.M. Fritz, and I. Buffam. 2018. Response to basal resources by stream macroinvertebrates is shaped by watershed urbanization, riparian canopy cover, and season. Freshwater Science 37(3). doi: 10.1086/699385.

Woldeab, B., A. Beyene, A. Ambelu, I. Buffam and S.T. Mereta. 2018. Seasonal and spatial variation of reservoir water quality in the southwest of Ethiopia. Environmental Monitoring and Assessment 190(3). doi: 10.1007/s10661-018-6527-4.

Tiwari, T., I. Buffam, R.A. Sponseller, and H. Laudon. 2017. Inferring scale-dependent processes influencing stream water chemistry from headwater to Sea. Limnology and Oceanography. doi: 10.1002/lno.10738.

Mitchell, M.E., S.F. Matter, R.D. Durtsche, and I. Buffam. 2017. Elevated phosphorus: dynamics during four years of green roof development. Urban Ecosystems 20(5): 1121-1133, doi: 10.1007/s11252-017-0664-3.

Alberts, J.M., J.J. Beaulieu and I. Buffam. 2017. Watershed Land-use and Seasonal Variation Constrain the Influence of Riparian Canopy Cover on Stream Ecosystem Metabolism. Ecosystems 20(3): 553-567, doi: 10.1007/s10021-016-0040-9.

Buffam, I., M.E. Mitchell, and R.D. Durtsche. 2016. Environmental drivers of seasonal variation in green roof runoff water quality. Ecological Engineering 91: 506-514, doi: 10.1016/j.ecoleng.2016.02.044.

Johnson, C.A., S. Schweinhart and I. Buffam. 2016. Plant species richness enhances nitrogen retention in green roof plots. Ecological Applications, doi: 10.1890/15-1850.1.

Solomon, C.T., S.E. Jones, B.C. Weidel, I. Buffam, M.L. Fork, J. Karlsson, S. Larsen, J.T. Lennon, J.S. Read, S.Sadro, and J.E. Saros. 2015. Ecosystem consequences of changing inputs of terrestrial dissolved organic matter to lakes. Ecosystems, doi:10.1007/s10021-015-9848-y.

Buffam, I. and M.E. Mitchell. 2015. Nutrient cycling in green roof ecosystems. Chapter 5 in R. Sutton, ed. Green Roof Ecosystems, p. 107-137, Springer, New York, doi: 10.1007/978-3-319-14983-7_5.

Wallin, M.B., T. Grabs, I. Buffam, H. Laudon, A. Ågren, M.G. Öquist, and K.H. Bishop. 2013. Evasion of CO2 from headwater streams – The dominant component of the carbon export through the aquatic conduit in a boreal landscape. Global Change Biology 19: 785-797. doi: 10.1111/gcb.12083.

Mooney-Bullock, R., I. Buffam, and M. Bolan. 2012. Urban learning laboratory features four educational, monitored green roofs. Cities Alive Conference Proceedings, 10 pp.

Stanley, E.H., S.M. Powers, N.R. Lottig, I. Buffam and J.T Crawford. 2012. Contemporary changes in dissolved organic carbon of human-dominated rivers: Is there a role for DOC management? Freshwater Biology 57 SI Supp. 1: 26-42. doi:10.1111/j.1365-2427.2011.02613.x.

Buffam, I., M.G. Turner, A.R. Desai, P.C. Hanson, J.A. Rusak, N.R. Lottig, E.H. Stanley and S.R. Carpenter. 2011. Integrating aquatic and terrestrial components to construct a complete carbon budget for a north temperate lake district. Global Change Biology 17: 1193-1211. doi: 10.1111/j.1365-2486.2010.02313.x.

Laudon, H., M. Berggren, A. Ågren, I. Buffam, K. Bishop, T. Grabs, M. Jansson, and S. Köhler. 2011. Patterns and dynamics of Dissolved Organic Carbon (DOC) in boreal streams: The role of processes, connectivity and scaling. Ecosystems 14: 880-893, doi:10.1007/s10021-011-9452-8.

Buffam, I., S. R. Carpenter, W. Yeck, P. C. Hanson, and M. G. Turner. 2010. Filling holes in regional carbon budgets: predicting peat depth in a north-temperate lake district. Journal of Geophysical Research-Biogeosciences 115: G01005, doi:10.1029/2009JG001034.

Ågren, A., I. Buffam, K. Bishop, and H. Laudon. 2010. Modeling stream dissolved organic carbon concentrations during spring flood in the boreal forest: A simple empirical approach for regional predictions. Journal of Geophysical Research-Biogeosciences 115: G01012, doi:10.1029/2009JG001013.

Bishop, K., I. Buffam, M. Erlandsson, J. Fölster, H. Laudon, and J. Temnerud. 2008. Aqua Incognita: The Unknown Headwaters. Hydrological Processes 22: 1239-1242.

Buffam, I., H. Laudon, J. Seibert, C.-M. Mörth and K. Bishop. 2008. Spatial heterogeneity of the spring flood acid pulse in a boreal stream network. Science Of The Total Environment: doi:10.1016/j.scitotenv.2008.10.006.

Köhler, S., I. Buffam, H. Laudon and K. Bishop. 2008. Climate's control of intra-annual and interannual variability of total organic carbon concentration and flux in two contrasting boreal landscape elements. Journal of Geophysical Research-Biogeosciences 113: G03012, doi:10.1029/2007JG000629.

Nilsson, M., J. Sagerfors, I. Buffam, H. Laudon, T. Eriksson, A. Grelle, L. Klemedtsson, P. Weslien, and A. Lindroth. 2008. Contemporary carbon accumulation in a boreal oligotrophic minerogenic mire - a significant sink after accounting for all C-fluxes. Global Change Biology 14: 2317-2332.

Buffam I., H. Laudon, J. Temnerud, C.-M. Mörth, and K. Bishop. 2007. Landscape-scale variability of acidity and dissolved organic carbon during spring flood in a boreal stream network. Journal of Geophysical Research 112: G01022, doi:10.1029/2006JG000218.


Contact

Senior Lecturer at the Institutionen för landskapsarkitektur, planering och förvaltning
Postal address:
Box 190
234 22 Lomma
Visiting address: Slottsvägen 5, Alnarp, Alnarp