Forest defoliator outbreaks alter nutrient cycling in northern waters
| Autor: | Erik J. S. Emilson, Andrew J. Tanentzap, Ronald E. Fournier, John M. Gunn, Sacha Khoury, James A. Rusak, Samuel G. Woodman |
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| Přispěvatelé: | Woodman, Samuel [0000-0001-9725-5867], Khoury, Sacha [0000-0002-1980-5365], Fournier, Ronald E [0000-0001-5833-4677], Emilson, Erik JS [0000-0002-1516-9728], Rusak, James A [0000-0002-4939-6478], Tanentzap, Andrew [0000-0002-2883-1901], Apollo - University of Cambridge Repository, Woodman, Samuel G [0000-0001-9725-5867], Tanentzap, Andrew J [0000-0002-2883-1901] |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Nutrient cycle Biogeochemical cycle Insecta 010504 meteorology & atmospheric sciences Ecosystem ecology Climate Change Science General Physics and Astronomy Forests 010603 evolutionary biology 01 natural sciences General Biochemistry Genetics and Molecular Biology Disease Outbreaks Element cycles Forest ecology parasitic diseases Temperate climate 631/158/2459 Animals Biomass Ecosystem 0105 earth and related environmental sciences Plant Diseases Ontario Biomass (ecology) Multidisciplinary Ecology article Boreal ecology Biogeochemistry 631/158/2454 General Chemistry Nutrients 15. Life on land 704/158/2445 6. Clean water Carbon 631/158/47/4112 Lakes Deciduous Boreal 13. Climate action 631/158/2449 Freshwater ecology Environmental science |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021) Nature Communications |
| Popis: | Insect defoliators alter biogeochemical cycles from land into receiving waters by consuming terrestrial biomass and releasing biolabile frass. Here, we related insect outbreaks to water chemistry across 12 boreal lake catchments over 32-years. We report, on average, 27% lower dissolved organic carbon (DOC) and 112% higher dissolved inorganic nitrogen (DIN) concentrations in lake waters when defoliators covered entire catchments and reduced leaf area. DOC reductions reached 32% when deciduous stands dominated. Within-year changes in DOC from insect outbreaks exceeded 86% of between-year trends across a larger dataset of 266 boreal and north temperate lakes from 1990 to 2016. Similarly, within-year increases in DIN from insect outbreaks exceeded local, between-year changes in DIN by 12-times, on average. As insect defoliator outbreaks occur at least every 5 years across a wider 439,661 km2 boreal ecozone of Ontario, we suggest they are an underappreciated driver of biogeochemical cycles in forest catchments of this region. Defoliating insects disrupt nutrient cycling of boreal catchments by redistributing carbon and nitrogen from forests to lakes. The resulting shift in lake biogeochemistry exceeds broader between-year trends observed across the boreal and north temperate region. |
| Databáze: | OpenAIRE |
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