Long-term declines in stream and river inorganic nitrogen (N) export correspond to forest change. Lucas, R. W., Sponseller, R. A., Gundale, M. J., Stendahl, J., Fridman, J., Högberg, P., & Laudon, H. Ecological Applications, 26(2):545–556, March, 2016. 00011![Long-term declines in stream and river inorganic nitrogen (N) export correspond to forest change [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Human activities have exerted a powerful influence on the biogeochemical cycles of nitrogen (N) and carbon (C) and drive changes that can be a challenge to predict given the influence of multiple environmental stressors. This study focused on understanding how land management and climate change have together influenced terrestrial N storage and watershed inorganic N export across boreal and sub-arctic landscapes in northern Sweden. Using long-term discharge and nutrient concentration data that have been collected continuously for over three decades, we calculated the hydrologic inorganic N export from nine watersheds in this region. We found a consistent decline in inorganic N export from 1985 to 2011 over the entire region from both small and large watersheds, despite the absence of any long-term trend in river discharge during this period. The steepest declines in inorganic N export were observed during the growing season, consistent with the hypothesis that observed changes are biologically mediated and are not the result of changes in long-term hydrology. Concurrent with the decrease in inorganic N export, we report sustained increases in terrestrial N accumulation in forest biomass and soils across northern Sweden. Given the close communication of nutrient and energy stores between plants, soils, and waters, our results indicate a regional tightening of the N cycle in an already N-limited environment as a result of changes in forest management and climate-mediated growth increases. Our results are consistent with declining inorganic N efflux previously reported from small headwater streams in other ecosystems and shed new light on the mechanisms controlling these patterns by identifying corresponding shifts in the terrestrial N balance, which have been altered by a combination of management activities and climate change.
@article{lucas_long-term_2016,
title = {Long-term declines in stream and river inorganic nitrogen ({N}) export correspond to forest change},
volume = {26},
issn = {1939-5582},
url = {http://onlinelibrary.wiley.com/doi/10.1890/14-2413/abstract},
doi = {10.1890/14-2413},
abstract = {Human activities have exerted a powerful influence on the biogeochemical cycles of nitrogen (N) and carbon (C) and drive changes that can be a challenge to predict given the influence of multiple environmental stressors. This study focused on understanding how land management and climate change have together influenced terrestrial N storage and watershed inorganic N export across boreal and sub-arctic landscapes in northern Sweden. Using long-term discharge and nutrient concentration data that have been collected continuously for over three decades, we calculated the hydrologic inorganic N export from nine watersheds in this region. We found a consistent decline in inorganic N export from 1985 to 2011 over the entire region from both small and large watersheds, despite the absence of any long-term trend in river discharge during this period. The steepest declines in inorganic N export were observed during the growing season, consistent with the hypothesis that observed changes are biologically mediated and are not the result of changes in long-term hydrology. Concurrent with the decrease in inorganic N export, we report sustained increases in terrestrial N accumulation in forest biomass and soils across northern Sweden. Given the close communication of nutrient and energy stores between plants, soils, and waters, our results indicate a regional tightening of the N cycle in an already N-limited environment as a result of changes in forest management and climate-mediated growth increases. Our results are consistent with declining inorganic N efflux previously reported from small headwater streams in other ecosystems and shed new light on the mechanisms controlling these patterns by identifying corresponding shifts in the terrestrial N balance, which have been altered by a combination of management activities and climate change.},
language = {en},
number = {2},
urldate = {2017-02-01},
journal = {Ecological Applications},
author = {Lucas, Richard W. and Sponseller, Ryan A. and Gundale, Michael J. and Stendahl, Johan and Fridman, Jonas and Högberg, Peter and Laudon, Hjalmar},
month = mar,
year = {2016},
note = {00011},
keywords = {\#nosource, Boreal forest, Sweden, climate-mediated growth increases, forest management, soil N storage, terrestrial N retention, terrestrial biogeochemistry},
pages = {545--556},
}
Downloads: 0
{"_id":"aGfSMJiaTRYJAeYp7","bibbaseid":"lucas-sponseller-gundale-stendahl-fridman-hgberg-laudon-longtermdeclinesinstreamandriverinorganicnitrogennexportcorrespondtoforestchange-2016","author_short":["Lucas, R. W.","Sponseller, R. A.","Gundale, M. J.","Stendahl, J.","Fridman, J.","Högberg, P.","Laudon, H."],"bibdata":{"bibtype":"article","type":"article","title":"Long-term declines in stream and river inorganic nitrogen (N) export correspond to forest change","volume":"26","issn":"1939-5582","url":"http://onlinelibrary.wiley.com/doi/10.1890/14-2413/abstract","doi":"10.1890/14-2413","abstract":"Human activities have exerted a powerful influence on the biogeochemical cycles of nitrogen (N) and carbon (C) and drive changes that can be a challenge to predict given the influence of multiple environmental stressors. This study focused on understanding how land management and climate change have together influenced terrestrial N storage and watershed inorganic N export across boreal and sub-arctic landscapes in northern Sweden. Using long-term discharge and nutrient concentration data that have been collected continuously for over three decades, we calculated the hydrologic inorganic N export from nine watersheds in this region. We found a consistent decline in inorganic N export from 1985 to 2011 over the entire region from both small and large watersheds, despite the absence of any long-term trend in river discharge during this period. The steepest declines in inorganic N export were observed during the growing season, consistent with the hypothesis that observed changes are biologically mediated and are not the result of changes in long-term hydrology. Concurrent with the decrease in inorganic N export, we report sustained increases in terrestrial N accumulation in forest biomass and soils across northern Sweden. Given the close communication of nutrient and energy stores between plants, soils, and waters, our results indicate a regional tightening of the N cycle in an already N-limited environment as a result of changes in forest management and climate-mediated growth increases. Our results are consistent with declining inorganic N efflux previously reported from small headwater streams in other ecosystems and shed new light on the mechanisms controlling these patterns by identifying corresponding shifts in the terrestrial N balance, which have been altered by a combination of management activities and climate change.","language":"en","number":"2","urldate":"2017-02-01","journal":"Ecological Applications","author":[{"propositions":[],"lastnames":["Lucas"],"firstnames":["Richard","W."],"suffixes":[]},{"propositions":[],"lastnames":["Sponseller"],"firstnames":["Ryan","A."],"suffixes":[]},{"propositions":[],"lastnames":["Gundale"],"firstnames":["Michael","J."],"suffixes":[]},{"propositions":[],"lastnames":["Stendahl"],"firstnames":["Johan"],"suffixes":[]},{"propositions":[],"lastnames":["Fridman"],"firstnames":["Jonas"],"suffixes":[]},{"propositions":[],"lastnames":["Högberg"],"firstnames":["Peter"],"suffixes":[]},{"propositions":[],"lastnames":["Laudon"],"firstnames":["Hjalmar"],"suffixes":[]}],"month":"March","year":"2016","note":"00011","keywords":"#nosource, Boreal forest, Sweden, climate-mediated growth increases, forest management, soil N storage, terrestrial N retention, terrestrial biogeochemistry","pages":"545–556","bibtex":"@article{lucas_long-term_2016,\n\ttitle = {Long-term declines in stream and river inorganic nitrogen ({N}) export correspond to forest change},\n\tvolume = {26},\n\tissn = {1939-5582},\n\turl = {http://onlinelibrary.wiley.com/doi/10.1890/14-2413/abstract},\n\tdoi = {10.1890/14-2413},\n\tabstract = {Human activities have exerted a powerful influence on the biogeochemical cycles of nitrogen (N) and carbon (C) and drive changes that can be a challenge to predict given the influence of multiple environmental stressors. This study focused on understanding how land management and climate change have together influenced terrestrial N storage and watershed inorganic N export across boreal and sub-arctic landscapes in northern Sweden. Using long-term discharge and nutrient concentration data that have been collected continuously for over three decades, we calculated the hydrologic inorganic N export from nine watersheds in this region. We found a consistent decline in inorganic N export from 1985 to 2011 over the entire region from both small and large watersheds, despite the absence of any long-term trend in river discharge during this period. The steepest declines in inorganic N export were observed during the growing season, consistent with the hypothesis that observed changes are biologically mediated and are not the result of changes in long-term hydrology. Concurrent with the decrease in inorganic N export, we report sustained increases in terrestrial N accumulation in forest biomass and soils across northern Sweden. Given the close communication of nutrient and energy stores between plants, soils, and waters, our results indicate a regional tightening of the N cycle in an already N-limited environment as a result of changes in forest management and climate-mediated growth increases. Our results are consistent with declining inorganic N efflux previously reported from small headwater streams in other ecosystems and shed new light on the mechanisms controlling these patterns by identifying corresponding shifts in the terrestrial N balance, which have been altered by a combination of management activities and climate change.},\n\tlanguage = {en},\n\tnumber = {2},\n\turldate = {2017-02-01},\n\tjournal = {Ecological Applications},\n\tauthor = {Lucas, Richard W. and Sponseller, Ryan A. and Gundale, Michael J. and Stendahl, Johan and Fridman, Jonas and Högberg, Peter and Laudon, Hjalmar},\n\tmonth = mar,\n\tyear = {2016},\n\tnote = {00011},\n\tkeywords = {\\#nosource, Boreal forest, Sweden, climate-mediated growth increases, forest management, soil N storage, terrestrial N retention, terrestrial biogeochemistry},\n\tpages = {545--556},\n}\n\n","author_short":["Lucas, R. W.","Sponseller, R. A.","Gundale, M. J.","Stendahl, J.","Fridman, J.","Högberg, P.","Laudon, H."],"key":"lucas_long-term_2016","id":"lucas_long-term_2016","bibbaseid":"lucas-sponseller-gundale-stendahl-fridman-hgberg-laudon-longtermdeclinesinstreamandriverinorganicnitrogennexportcorrespondtoforestchange-2016","role":"author","urls":{"Paper":"http://onlinelibrary.wiley.com/doi/10.1890/14-2413/abstract"},"keyword":["#nosource","Boreal forest","Sweden","climate-mediated growth increases","forest management","soil N storage","terrestrial N retention","terrestrial biogeochemistry"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"http://bibbase.org/zotero/circ-publications","dataSources":["nbqZWNnSmJwdJFEEB","Mdrhvw5KhxFbTbWoS","LErWk8avdgETh2iR9","Cac5nog9ND5ndLYhY","xTmt4jq9swAwpBHJB","LXbacBrgTRDPkh9C2","dLPsL5XH9N5Pjush7"],"keywords":["#nosource","boreal forest","sweden","climate-mediated growth increases","forest management","soil n storage","terrestrial n retention","terrestrial biogeochemistry"],"search_terms":["long","term","declines","stream","river","inorganic","nitrogen","export","correspond","forest","change","lucas","sponseller","gundale","stendahl","fridman","högberg","laudon"],"title":"Long-term declines in stream and river inorganic nitrogen (N) export correspond to forest change","year":2016}