Julie E. Helson
University of Toronto
12 Papers
33 Citations
Julie E. Helson is an academic researcher from University of Toronto. The author has contributed to research in topics: Plant litter & Ecosystem. The author has an hindex of 12, co-authored 12 publications.
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Papers
Riparian plant litter quality increases with latitude
Luz Boyero,Manuel A. S. Graça,Alan M. Tonin,Javier Pérez,Andrew J. M. Swafford,Verónica Ferreira,Andrea Landeira-Dabarca,Andrea Landeira-Dabarca,Markos A. Alexandrou,Mark O. Gessner,Mark O. Gessner,Brendan G. McKie,Ricardo J. Albariño,Leon A. Barmuta,Marcos Callisto,Julián Chará,Eric Chauvet,Checo Colón-Gaud,David Dudgeon,Andrea C. Encalada,Andrea C. Encalada,Ricardo Figueroa,Alexander S. Flecker,Tadeusz Fleituch,André Frainer,André Frainer,José F. Gonçalves,Julie E. Helson,Tomoya Iwata,Jude M. Mathooko,Charles M'Erimba,Catherine M. Pringle,Alonso Ramírez,Christopher M. Swan,Catherine M. Yule,Richard G. Pearson +35 more
TL;DR: It is hypothesized that litter quality would increase with latitude (despite variation within regions) and traits would be correlated to produce ‘syndromes’ resulting from phylogeny and environmental variation, and it is found lower litter quality and higher nitrogen:phosphorus ratios in the tropics.
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A global experiment suggests climate warming will not accelerate litter decomposition in streams but might reduce carbon sequestration
Luz Boyero,Richard G. Pearson,Mark O. Gessner,Mark O. Gessner,Leon A. Barmuta,Verónica Ferreira,Manuel A. S. Graça,David Dudgeon,Andrew J. Boulton,Marcos Callisto,Eric Chauvet,Eric Chauvet,Julie E. Helson,Andreas Bruder,Andreas Bruder,Ricardo J. Albariño,Catherine M. Yule,Muthukumarasamy Arunachalam,Judy N. Davies,Ricardo Figueroa,Alexander S. Flecker,Alonso Ramírez,Russell G. Death,Tomoya Iwata,Jude M. Mathooko,Catherine Mathuriau,José F. Gonçalves,Marcelo S. Moretti,Tajang Jinggut,Sylvain Lamothe,Sylvain Lamothe,Charles M'Erimba,Lavenia Ratnarajah,Markus Schindler,José Castela,Leonardo Buria,Aydeé Cornejo,Aydeé Cornejo,Verónica Díaz Villanueva,Derek C. West +39 more
TL;DR: It is found that climate warming will likely hasten microbial litter decomposition and produce an equivalent decline in detritivore-mediated decomposition rates, which implies consequences for global biogeochemistry and a possible positive climate feedback.
Biotic and abiotic variables influencing plant litter breakdown in streams: a global study.
Luz Boyero,Richard G. Pearson,Cang Hui,Cang Hui,Mark O. Gessner,Mark O. Gessner,Javier Pérez,Markos A. Alexandrou,Manuel A. S. Graça,Bradley J. Cardinale,Ricardo J. Albariño,Muthukumarasamy Arunachalam,Leon A. Barmuta,Andrew J. Boulton,Andreas Bruder,Marcos Callisto,Eric Chauvet,Russell G. Death,David Dudgeon,Andrea C. Encalada,Andrea C. Encalada,Verónica Ferreira,Ricardo Figueroa,Alexander S. Flecker,José F. Gonçalves,Julie E. Helson,Tomoya Iwata,Tajang Jinggut,Jude M. Mathooko,Catherine Mathuriau,Charles M'Erimba,Marcelo S. Moretti,Catherine M. Pringle,Alonso Ramírez,Lavenia Ratnarajah,José Rincón,Catherine M. Yule +36 more
TL;DR: A global-scale study of litter breakdown in streams to compare the roles of biotic, climatic and other environmental factors on breakdown rates revealed that breakdown of alder was driven by climate, with some influence of pH, whereas variation in breakdown of litter mixtures was explained mainly by litter quality and PD.
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Global patterns of stream detritivore distribution: implications for biodiversity loss in changing climates
Luz Boyero,Richard G. Pearson,David Dudgeon,Verónica Ferreira,Manuel A. S. Graça,Mark O. Gessner,Andrew J. Boulton,Eric Chauvet,Eric Chauvet,Catherine M. Yule,Ricardo J. Albariño,Alonso Ramírez,Julie E. Helson,Marcos Callisto,Muthukumarasamy Arunachalam,Julián Chará,Ricardo Figueroa,Jude M. Mathooko,José F. Gonçalves,Marcelo S. Moretti,Ana M. Chará-Serna,Judy N. Davies,Andrea C. Encalada,Sylvain Lamothe,Sylvain Lamothe,Leonardo Buria,José Castela,Aydeé Cornejo,Aggie O. Y. Li,Charles M'Erimba,Verónica Díaz Villanueva,María del Carmen Zúñiga,Christopher M. Swan,Leon A. Barmuta +33 more
TL;DR: In this paper, the authors used linear regression to examine the latitudinal variation in shredder diversity at different spatial scales: alpha (a), gamma (g) and beta (b) diversity.
Larval Chironomid Community Organization in Four Tropical Rivers: Human Impacts and Longitudinal Zonation
TL;DR: In this article, Chironomid larvae were collected between February 1997 and December 1998 from four Trinidadian rivers, two relatively impacted (the Arima and Guanapo Rivers), and two comparatively pristine (the Marianne and Paria Rivers), in order to assess community changes as a result of both land-use and the natural longitudinal gradient.
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