Articles | Volume 18, issue 10
Biogeosciences, 18, 3029–3052, 2021
https://doi.org/10.5194/bg-18-3029-2021
Biogeosciences, 18, 3029–3052, 2021
https://doi.org/10.5194/bg-18-3029-2021
Research article
20 May 2021
Research article | 20 May 2021

Rain-fed streams dilute inorganic nutrients but subsidise organic-matter-associated nutrients in coastal waters of the northeast Pacific Ocean

Kyra A. St. Pierre et al.

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Cited articles

Alaback, P. B.: Biodiversity Patterns in Relation to Climate: The Coastal Temperate Rainforests of North America, in: High-Latitude Rainforests and Associated Ecosystems of the West Coast of the Americas: Climate, Hydrology, Ecology, and Conservation, edited by: Lawford, R. G., Fuentes, E., and Alaback, P. B., Springer New York, New York, USA, 105–133, 1996. 
Alvarez-Cobelas, M., Angeler, D. G., and Sánchez-Carrillo, S.: Export of nitrogen from catchments: A worldwide analysis, Environ. Pollut., 156, 261–269, https://doi.org/10.1016/j.envpol.2008.02.016, 2008. 
Analytical Methods Committee: What should be done with results below the detection limit? Mentioning the unmentionable, AMC Technical Brief, Royal Society of Chemistry, available at: https://www.rsc.org/images/results-below-detection-limit-technical-brief-5_tcm18-214854.pdf (last access: 17 January 2021), London, UK, 2001. 
Arimitsu, M. L., Hobson, K. A., Webber, D. A. N., Piatt, J. F., Hood, E. W., and Fellman, J. B.: Tracing biogeochemical subsidies from glacier runoff into Alaska's coastal marine food webs, Global Change Biol., 24, 387–398, https://doi.org/10.1111/gcb.13875, 2018. 
Batchelli, S., Muller, F. L. L., Chang, K.-C., and Lee, C.-L.: Evidence for Strong but Dynamic Iron-Humic Colloidal Associations in Humic-Rich Coastal Waters, Environ. Sci. Technol., 44, 8485–8490, https://doi.org/10.1021/es101081c, 2010. 
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Using 4 years of paired freshwater and marine water chemistry from the Central Coast of British Columbia (Canada), we show that coastal temperate rainforest streams are sources of organic nitrogen, iron, and carbon to the Pacific Ocean but not the inorganic nutrients easily used by marine phytoplankton. This distinction may have important implications for coastal food webs and highlights the need to sample all nutrients in fresh and marine waters year-round to fully understand coastal dynamics.
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