Water-Quality Impacts from Climate-Induced Forest Die-Off. Mikkelson, K. M., Dickenson, E. R. V., Maxwell, R. M., McCray, J. E., & Sharp, J. O. 3(3):218–222. ![Water-Quality Impacts from Climate-Induced Forest Die-Off [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Increased ecosystem susceptibility to pests and other stressors has been attributed to climate change, resulting in unprecedented tree mortality from insect infestations. In turn, large-scale tree die-off alters physical and biogeochemical processes, such as organic matter decay and hydrologic flow paths, that could enhance leaching of natural organic matter to soil and surface waters and increase potential formation of harmful drinking water disinfection by-products (DBPs). Whereas previous studies have investigated water-quantity alterations due to climate-induced, forest die-off, impacts on water quality are unclear. Here, water-quality data sets from water-treatment facilities in Colorado were analysed to determine whether the municipal water supply has been perturbed by tree mortality. Results demonstrate higher total organic carbon concentrations along with significantly more DBPs at water-treatment facilities using mountain-pine-beetle-infested source waters when contrasted with those using water from control watersheds. In addition to this differentiation between watersheds, DBP concentrations demonstrated an increase within mountain pine beetle watersheds related to the degree of infestation. Disproportionate DBP increases and seasonal decoupling of peak DBP and total organic carbon concentrations further suggest that the total organic carbon composition is being altered in these systems. [Excerpt] [...] Changes in hydrology following bark-beetle infestation such as decreased interception, increased erosion and particulate transport, increased soil moisture and increased radiation to the forest floor can lead to altered degradation and transport of soil organic matter in both particulate and dissolved forms. Total organic carbon (TOC, which comprises particulate and dissolved organic carbon) increases have been observed across large areas of the Northern Hemisphere, and although there is no scientific consensus on the driving mechanisms of increased TOC a number of different factors have been proposed including changes in acid deposition, variability in climate and land-use changes. We propose that the recent bark-beetle epidemic is another mechanism that may alter TOC loading and composition in surface and groundwaters. Changes in TOC characteristics and increased loading can lead to human health concerns as humic and fulvic fractions of natural organic matter (NOM) have been correlated with the formation of DBPs, such as trihalomethanes (THMs, known carcinogens), during chlorination. Hence, the potential for exceedance of regulatory limits, human health impacts and increased treatment costs are potential concerns for water-treatment facilities associated with bark-beetle-infested watersheds [...]
@article{mikkelsonWaterqualityImpactsClimateinduced2012,
title = {Water-Quality Impacts from Climate-Induced Forest Die-Off},
author = {Mikkelson, Kristin M. and Dickenson, Eric R. V. and Maxwell, Reed M. and McCray, John E. and Sharp, Jonathan O.},
date = {2012-10},
journaltitle = {Nature Climate Change},
volume = {3},
pages = {218--222},
issn = {1758-678X},
doi = {10.1038/nclimate1724},
url = {https://doi.org/10.1038/nclimate1724},
abstract = {Increased ecosystem susceptibility to pests and other stressors has been attributed to climate change, resulting in unprecedented tree mortality from insect infestations. In turn, large-scale tree die-off alters physical and biogeochemical processes, such as organic matter decay and hydrologic flow paths, that could enhance leaching of natural organic matter to soil and surface waters and increase potential formation of harmful drinking water disinfection by-products (DBPs). Whereas previous studies have investigated water-quantity alterations due to climate-induced, forest die-off, impacts on water quality are unclear. Here, water-quality data sets from water-treatment facilities in Colorado were analysed to determine whether the municipal water supply has been perturbed by tree mortality. Results demonstrate higher total organic carbon concentrations along with significantly more DBPs at water-treatment facilities using mountain-pine-beetle-infested source waters when contrasted with those using water from control watersheds. In addition to this differentiation between watersheds, DBP concentrations demonstrated an increase within mountain pine beetle watersheds related to the degree of infestation. Disproportionate DBP increases and seasonal decoupling of peak DBP and total organic carbon concentrations further suggest that the total organic carbon composition is being altered in these systems.
[Excerpt] [...] Changes in hydrology following bark-beetle infestation such as decreased interception, increased erosion and particulate transport, increased soil moisture and increased radiation to the forest floor can lead to altered degradation and transport of soil organic matter in both particulate and dissolved forms. Total organic carbon (TOC, which comprises particulate and dissolved organic carbon) increases have been observed across large areas of the Northern Hemisphere, and although there is no scientific consensus on the driving mechanisms of increased TOC a number of different factors have been proposed including changes in acid deposition, variability in climate and land-use changes. We propose that the recent bark-beetle epidemic is another mechanism that may alter TOC loading and composition in surface and groundwaters. Changes in TOC characteristics and increased loading can lead to human health concerns as humic and fulvic fractions of natural organic matter (NOM) have been correlated with the formation of DBPs, such as trihalomethanes (THMs, known carcinogens), during chlorination. Hence, the potential for exceedance of regulatory limits, human health impacts and increased treatment costs are potential concerns for water-treatment facilities associated with bark-beetle-infested watersheds [...]},
keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-12305779,~to-add-doi-URL,climate-change,dendroctonus-ponderosae,die-off,forest-pests,forest-resources,human-health,integrated-natural-resources-modelling-and-management,organic-carbon,soil-erosion,soil-resources,water-quality,water-resources},
number = {3}
}
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O."],"bibdata":{"bibtype":"article","type":"article","title":"Water-Quality Impacts from Climate-Induced Forest Die-Off","author":[{"propositions":[],"lastnames":["Mikkelson"],"firstnames":["Kristin","M."],"suffixes":[]},{"propositions":[],"lastnames":["Dickenson"],"firstnames":["Eric","R.","V."],"suffixes":[]},{"propositions":[],"lastnames":["Maxwell"],"firstnames":["Reed","M."],"suffixes":[]},{"propositions":[],"lastnames":["McCray"],"firstnames":["John","E."],"suffixes":[]},{"propositions":[],"lastnames":["Sharp"],"firstnames":["Jonathan","O."],"suffixes":[]}],"date":"2012-10","journaltitle":"Nature Climate Change","volume":"3","pages":"218–222","issn":"1758-678X","doi":"10.1038/nclimate1724","url":"https://doi.org/10.1038/nclimate1724","abstract":"Increased ecosystem susceptibility to pests and other stressors has been attributed to climate change, resulting in unprecedented tree mortality from insect infestations. 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In addition to this differentiation between watersheds, DBP concentrations demonstrated an increase within mountain pine beetle watersheds related to the degree of infestation. Disproportionate DBP increases and seasonal decoupling of peak DBP and total organic carbon concentrations further suggest that the total organic carbon composition is being altered in these systems. [Excerpt] [...] Changes in hydrology following bark-beetle infestation such as decreased interception, increased erosion and particulate transport, increased soil moisture and increased radiation to the forest floor can lead to altered degradation and transport of soil organic matter in both particulate and dissolved forms. Total organic carbon (TOC, which comprises particulate and dissolved organic carbon) increases have been observed across large areas of the Northern Hemisphere, and although there is no scientific consensus on the driving mechanisms of increased TOC a number of different factors have been proposed including changes in acid deposition, variability in climate and land-use changes. We propose that the recent bark-beetle epidemic is another mechanism that may alter TOC loading and composition in surface and groundwaters. Changes in TOC characteristics and increased loading can lead to human health concerns as humic and fulvic fractions of natural organic matter (NOM) have been correlated with the formation of DBPs, such as trihalomethanes (THMs, known carcinogens), during chlorination. 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Here, water-quality data sets from water-treatment facilities in Colorado were analysed to determine whether the municipal water supply has been perturbed by tree mortality. Results demonstrate higher total organic carbon concentrations along with significantly more DBPs at water-treatment facilities using mountain-pine-beetle-infested source waters when contrasted with those using water from control watersheds. In addition to this differentiation between watersheds, DBP concentrations demonstrated an increase within mountain pine beetle watersheds related to the degree of infestation. 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