2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 11:15 AM - 11:30 AM | GLOBAL PATTERNS AND CONTROLS OF ORGANIC-MATTER DECOMPOSITION IN STREAMS AND RIPARIAN ZONES REVEALED THROUGH CROWDSOURCING | 410 B
GLOBAL PATTERNS AND CONTROLS OF ORGANIC-MATTER DECOMPOSITION IN STREAMS AND RIPARIAN ZONES REVEALED THROUGH CROWDSOURCING
Organic-matter decomposition is a central process in streams and riparian ecosystems, yet large-scale patterns and controls of this process are poorly known. Adopting a crowdsourcing approach, we deployed a standardized decomposition assay in over 500 streams and their riparian zones. Sites spanned 140 degrees of latitude, and were located on each continent and in each major biome. We observed global-scale patterns in decay rates, including stark differences among biomes, and negative relationships with latitude. Decay is particularly rapid in tropical forests (wet and dry) and slow in tundra and boreal forests; other biomes are bracketed by these extremes. Variability increases towards the equator, suggesting temperature limitation at high latitudes and greater scope for other environmental factors to influence decay at lower latitudes. The ratio of riparian to instream decomposition rates ranges widely among riparian-stream pairs and biomes. Activation energy is greater in streams than riparian zones, suggesting different factors govern decay. These findings are a step towards establishing baseline data to track global change, and providing a process-based tool for emerging international assessment programs (e.g., Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, Convention on Biological Diversity).
- Allochthonous
- Aquatic-terrestrial Linkage
- Detritus
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Presenters/Authors
Scott Tiegs
(), Dept. of Biological Sciences, Oakland University, tiegs@oakland.edu;
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David Costello
(), Kent State University, dcostel3@kent.edu;
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Mark Isken
(), Dept. of Decision and Information Sciences, School of Business Administration, Oakland University, isken@oakland.edu;
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Guy Woodward
(), Imperial College London, gu.woodward@imperial.ac.uk;
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Peter B. McIntyre
(), Cornell University, pbm3@cornell.ecu;
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Eric Chauvet
(), EcoLab, Université de Toulouse, CNRS, France, eric.chauvet@univ-tlse3.fr;
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Alexander Flecker
(), Cornell University, Ithaca, NY, USA, asf3@cornell.edu;
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Mark Gessner
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries / Berlin Institute of Technology , gessner@igb-berlin.de;
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Natalie A. Griffiths
(), Oak Ridge National Laboratory, griffithsna@ornl.gov;
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the CELLDEX Consortium
(), Multiple Institutions, CELLDEX.consortium@gmail.com;
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