caa a22 4500 605517282 CHVBK 20210128100719.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10533-015-0156-6 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0156-6 Stoichiometric impact of calcium carbonate deposition on nitrogen and phosphorus supplies in three montane streams [Elektronische Daten] [Jessica Corman, Eric Moody, James Elser] The absolute concentrations of nitrogen (N) and phosphorus (P) and their relative availabilities (N:P stoichiometry) can influence numerous ecological processes. In streams, N:P stoichiometry is influenced by different hydrologic and biogeochemical processes that also affect the downstream transport of these nutrients to receiving waters. Calcium carbonate (CaCO3) deposition, a widespread geochemical process in alkaline streams and other aquatic ecosystems, can lower phosphate concentrations and, potentially, decrease P availability relative to N availability. We evaluated the effects of CaCO3 deposition on stream water stoichiometry using a 3-year dataset of stream physicochemistry and several metrics of CaCO3 deposition across three streams in the Huachuca Mountains of southern Arizona, USA. CaCO3 deposition rates varied across and within streams, with benthic coverage of travertine as high as 70% and deposition rates up to 8.3μg Ca2+ L−1 m−1. Redundancy analysis revealed a strong, negative correlation between stream water phosphate concentrations and CaCO3 deposition rates, a relationship that also extended to total P concentrations, and a strong, positive correlation between inorganic N concentrations and CaCO3 deposition rates. Furthermore, we found a significant positive relationship between CaCO3 deposition rates and N:P ratios. These results support the role of coprecipitation of phosphate with CaCO3 deposition in reducing P supply. They also suggest that reduced concentrations of P in the water column may reduce biological N uptake, amplifying the stoichiometric signal of CaCO3 deposition. Springer International Publishing Switzerland, 2015 Calcium carbonate nationallicence Nutrient cycling nationallicence Streams nationallicence Stoichiometry nationallicence Redundancy analysis nationallicence Corman Jessica School of Life Sciences, Arizona State University, Tempe, AZ, USA aut Moody Eric School of Life Sciences, Arizona State University, Tempe, AZ, USA aut Elser James School of Life Sciences, Arizona State University, Tempe, AZ, USA aut Biogeochemistry Springer International Publishing 126/3(2015-12-01), 285-300 0168-2563 126:3<285 2015 126 10533 https://doi.org/10.1007/s10533-015-0156-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0156-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Corman Jessica School of Life Sciences, Arizona State University, Tempe, AZ, USA aut NATIONALLICENCE 700 1- Moody Eric School of Life Sciences, Arizona State University, Tempe, AZ, USA aut NATIONALLICENCE 700 1- Elser James School of Life Sciences, Arizona State University, Tempe, AZ, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/3(2015-12-01), 285-300 0168-2563 126:3<285 2015 126 10533