Ira Tanya Handa

Assistant Professor,
Université du Québec à Montréal

Département des Sciences Biologiques
Bureau: SB-2305, Laboratoire: SB-1926
141 Avenue du Président-Kennedy
Montréal (Québec), Canada H2X 1Y4
Tel: (514) 987-3000, poste 1644
Institution page

B.Sc. (1996) : McGill University in Biology
M.Sc. (1998) : University of Toronto in Botany
Ph.D. (2006): University of Basel (Switzerland) in Plant Ecology.

Dr. Handa's research interests are linked by the desire to understand the consequences of global change on ecosystem processes. She is interested in how changes such as rising atmospheric CO2 or urbanisation affect tree growth, as well as how changes in biodiversity influence litter decomposition and nutrient cycling in forest ecosystems.

QCBS students
Javier Ibarra Isassi, Ph.D.
(Start: 2016)

Other QCBS (co-)supervisor: Jean-Philippe Lessard
Thesis title: How do changes in soil-dwelling ant functional diversity and community structure affect invertebrate litter-community and ecosystem function
Personal page
Jorge Ramirez, Ph.D.
(Start: 2011)

Thesis title: The functional role of carbohydrate reserves in the growth and survival of trees
Personal page
Laura Jeanne Raymond-Léonard, M.Sc.
(Start: 2015)

Thesis title: Functional diversity at multiple trophic levels: will exotic tree litter modify the collembola community structure?
Previous students (since 2009)
Pierre-Marc Brousseau, Ph.D.
(Start: 2011, End: 2017)
Other QCBS (co-)supervisor: Dominique Gravel
Thesis title: Soil arthropod diversity and decomposition in temperate forests of southern Quebec
Laurent Rousseau, Ph.D.
(Start: 2013, End: 2016)

Other (co-)supervisor: Lisa Venier (Canadian Forest Service)
Thesis title: Effects of the woody biomass harvesting on the soil functioning and mesofaunal communities in the Canadian boreal forest
Chelsea Archambault, M.Sc.
(Start: 2012, End: 2014)
Thesis title: Roots interactions in a biodiversity experiment with trees
Robin Beauséjour, M.Sc.
(Start: 2011, End: 2014)

Other QCBS (co-)supervisor: Mark Vellend
Thesis title: Plant community change over the past decade at Mont St-Hilaire, Québec
Nathaly Guerrero Ramirez, M.Sc.
(Start: 2011, End: 2013)

Other (co-)supervisor: Christian Messier, UQAM
Thesis title: The role of functional diversity in root decomposition of a secondary tropical forest plantation (Sardinilla, Panama)
Eugénie Potvin, M.Sc.
(Start: 2012, End: 2017)
Thesis title: Ecosystem services in forests of southern Québec
ENV 7000 - Perspectives interdisciplinaires dans l\'étude des problématiques environnementales (Winter / Hiver)
BIO 9010 - Examen de synthèse (Fall / Automne)
BIA 1700 - Organismes et environnement (Fall and winter / Automne et hiver)
BIA 3010 - Méthodologie en écologie (Winter / Hiver)
BIO 8071 - Séminaires de recherche (Winter / Hiver)
BIA 4000 - Intégration - projet multidisciplinaire (Fall / Automne)

26- Carbohydrate dynamics in roots, stems, and branches after maintenance pruning in two common urban tree species of North America
Ramirez J., Handa I., Posada J., Delagrange S., Messier C.
2018 Urban Forestry and Urban Greening (Date Added: 2018-01-24)

25- Trait matching and phylogeny as predictors of predator–prey interactions involving ground beetles
Brousseau P., Gravel D., Handa I.T.
2018 Functional Ecology (Date Added: 2018-01-19)

24- Forest floor mesofauna communities respond to a gradient of biomass removal and soil disturbance in a boreal jack pine (Pinus banksiana) stand of northeastern Ontario (Canada)
Rousseau L., Venier L., Hazlett P., Fleming R., Morris D., Handa I.T.
2018 Forest Ecology and Management (Date Added: 2018-01-03)

23- The unseen invaders: introduced earthworms as drivers of change in plant communities in North American forests (a meta-analysis)
Craven D., Thakur M.P., Cameron E.K., Frelich L.E., Beauséjour R., Blair R.B., Blossey B., Burtis J., Choi A., Dávalos A., Fahey T.J., Fisichelli N.A., Gibson K., Handa I.T., Hopfensperger K., Loss S.R., Nuzzo V., Maerz J.C., Sackett T., Scharenbroch B.C., Smith S.M., Vellend M., Umek L.G., Eisenhauer N.
2017 Global Change Biology (Date Added: 2017-02-26)

22- Trade-offs between timber production, carbon stocking and habitat quality when managing woodlots for multiple ecosystem services
Carpentier, S., Filotas, E., Handa, I.T., Messier, C.
2017 Environmental Conservation (Date Added: 2016-12-05)

21- Root quality and decomposition environment, but not tree species richness, drive root decomposition in tropical forests
Guerrero-Ramírez, N.R., Craven, D., Messier, C., Potvin, C., Turner, B.L., Handa, I.T.
2016 Plant and Soil (Date Added: 2016-10-11)

20- The importance of litter traits and decomposers for litter decomposition: A comparison of aquatic and terrestrial ecosystems within and across biomes
García-Palacios, P., McKie, B.G., Handa, I.T., Frainer, A., Hättenschwiler, S.
2016 Functional Ecology (Date Added: 2016-01-14)

18- Consequences of biodiversity loss for litter decomposition across biomes
Handa, I.T., Aerts, R., Berendse, F., Berg, M.P., Bruder, A., Butenschoen, O., Chauvet, E., Gessner, M.O., Jabiol, J., Makkonen, M., McKie, B.G., Malmqvist, B., Peeters, E.T.H.M., Scheu, S., Schmid, B., van Ruijven, J., Vos, V.C.A., Hattenschwiler, S.
2014 Nature (Date Added: 2015-07-24)

17- Historical anthropogenic disturbances influence patterns of non-native earthworm and plant invasions in a temperate primary forest
Beauséjour, Robin, Handa, I. Tanya, Lechowicz, Martin J., Gilbert, Benjamin, Vellend, Mark
2014 Biological Invasions (Date Added: 2014-10-20)

16- Alpine treelines in a CO2 – rich world : synthesis of a nine year free air CO2 enrichment study
Dawes MA, Hagedorn F, Handa IT, Streit K, Ekblad A, Rixen C, Körner C, Hättenschwiler S
2013 Oecologia (Date Added: 2016-06-27)

15- Highly consistent effects of plant litter identity and functional traits on decomposition across a latitudinal gradient
Makkonen, Marika, Berg, Matty P., Handa, I. Tanya, Hättenschwiler, Stephan, van Ruijven, Jasper, van Bodegom, Peter M., Aerts, Rien
2012 Ecology Letters (Date Added: 2012-09-17)

14- Growth and community responses of alpine dwarf shrubs to in situ CO2 enrichment and soil warming
Dawes, Melissa A., Hagedorn, Frank, Zumbrunn, Thomas, Handa, Ira Tanya, Hättenschwiler, Stephan, Wipf, Sonja, Rixen, Christian
2011 New Phytologist (Date Added: 2011-09-27)

13- Leaf traits and decomposition in tropical rainforests: Revisiting some commonly held views and towards a new hypothesis
Hättenschwiler, S., Coq, S., Barantal, S., Handa, I.T.
2011 New Phytologist (Date Added: 2011-07-28)

12- The ecology of saprophagous macroarthropods (millipedes, woodlice) in the context of global change
David, J.-F., Handa, I.T.
2010 Biological Reviews (Date Added: 2011-07-28)

11- Species-specific tree growth responses to 9?years of CO2 enrichment at the alpine treeline
Dawes, Melissa A., Hättenschwiler, Stephan, Bebi, Peter, Hagedorn, Frank, Handa, Ira Tanya, Körner, Christian, Rixen, Christian
2010 Journal of Ecology (Date Added: 2011-05-26)

10- Snail and millipede complementarity in decomposing Mediterranean forest leaf litter mixtures
de Oliveira, T., Hättenschwiler, S., Handa, I.T.
2010 Functional Ecology (Date Added: 2011-04-20)

9- The importance of biotic factors in predicting global change effects on decomposition of temperate forest leaf litter
Rouifed, S., Handa, I.T., David, J.-F., Hättenschwiler, S.
2010 Oecologia (Date Added: 2011-04-20)

8-Interactions between lesser snow geese and Arctic coastal vegetation leading to alternative stable states.
Handa, Tanya, Jefferies, R.L.
2009 New models for ecosystem dynamics and restoration ( Date Added: 2012-09-17)

7- No stimulation in root production in response to 4 years of in situ CO 2 enrichment at the Swiss treeline
Handa, I.T., Hagedorn, F., Hättenschwiler, S.
2008 Functional Ecology (Date Added: 2011-07-28)

6- Elevated atmospheric CO2 fuels leaching of old dissolved organic matter at the alpine treeline
Hagedorn, F., van Hees, P.A.W., Handa, I.T., Hättenschwiler, S.
2008 Global Biogeochemical Cycles (Date Added: 2011-07-28)

5- Conifer stem growth at the altitudinal treeline in response to four years of CO2 enrichment
Handa, I.T., Körner, C., Hättenschwiler, S.
2006 Global Change Biology (Date Added: 2011-04-20)

4- A test of the treeline carbon limitation hypothesis by in situ CO 2 enrichment and defoliation
Handa, I.T., Körner, C., Hättenschwiler, S.
2005 Ecology (Date Added: 2011-07-28)

3- Patterns of vegetation change and the recovery potential of degraded areas in a coastal marsh system of the hudson bay lowlands
Handa, I.T., Harmsen, R., Jefferies, R.L.
2002 Journal of Ecology (Date Added: 2011-07-28)

2- Atmospheric CO2 enrichment of alpine treeline conifers
Hättenschwiler, S., Handa, I.T., Egli, L., Asshoff, R., Ammann, W., Körner, C.
2002 New Phytologist (Date Added: 2011-07-28)

1- Assisted revegetation trials in degraded salt-marshes
Handa, I.T., Jefferies, R.L.
2000 Journal of Applied Ecology (Date Added: 2011-07-28)