Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential
Carbonate-rich groundwater discharged from springs, seeps, and spring-fed rivers on carbonate platforms creates environments of potential refuge for calcifying organisms in coastal waters by supplying higher [Ca2+] and [CO32-] along with typically lower nutrient concentrations. The benefits associat...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Digital Commons @ University of South Florida
2019
|
Subjects: | |
Online Access: | https://digitalcommons.usf.edu/msc_facpub/892 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=1912&context=msc_facpub |
id |
ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-1912 |
---|---|
record_format |
openpolar |
spelling |
ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-1912 2023-05-15T17:51:51+02:00 Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential Beckwith, Sean Thomas Byrne, Robert H. Hallock, Pamela 2019-04-01T07:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/892 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=1912&context=msc_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/892 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=1912&context=msc_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY Marine Science Faculty Publications carbonate-rich groundwater first-magnitude springs ocean acidification riverine calcium seagrass west florida coastal waters Life Sciences article 2019 ftunisfloridatam 2021-10-09T07:51:26Z Carbonate-rich groundwater discharged from springs, seeps, and spring-fed rivers on carbonate platforms creates environments of potential refuge for calcifying organisms in coastal waters by supplying higher [Ca2+] and [CO32-] along with typically lower nutrient concentrations. The benefits associated with carbonate terrains are maximized in the presence of submerged aquatic vegetation (SAV), especially seagrasses. To improve the accuracy of carbonate saturation state (Ω) determinations, calculated values of [CO32-] and Ksp∗ were paired with [Ca2+] values determined using a model that incorporates directly measured riverine calcium end-members (model A). This model results in Ω values larger than those calculated by assuming that [Ca2+] is directly proportional to salinity (model B; e.g., using CO2SYS, CO2calc). As an example, for salinity (S) between 13.5 and 24, improvements in saturation states calculated as differences (ΔΩ) between model A and model B saturation states in the tidal mixing zone of the Weeki Wachee River (Florida, United States) ranged from 0.39 to 1.00 (aragonite) and 0.61–1.65 (calcite). Saturation state ratios (Ω(A)/Ω(B)) for coastal waters with enhanced [Ca2+] originating from carbonate-rich groundwater can be calculated from end-member calcium concentrations and salinity. Applied to several river systems in the conterminous United States, Ω(A)/Ω(B) values calculated at S = 20 lead to Ω(A)/Ω(B) ratios of 1.12 (Weeki Wachee), 1.09 (Anclote), 1.06 (Mississippi), and 1.03 (Columbia). These increases in saturation states can be used to identify potential calcification refugia for subsequent high resolution field studies that focus on, for example, the long-term viability of oyster communities and other calcifying organisms in brackish coastal waters. Article in Journal/Newspaper Ocean acidification Digital Commons University of South Florida (USF) Sav’ ENVELOPE(156.400,156.400,68.817,68.817) |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
carbonate-rich groundwater first-magnitude springs ocean acidification riverine calcium seagrass west florida coastal waters Life Sciences |
spellingShingle |
carbonate-rich groundwater first-magnitude springs ocean acidification riverine calcium seagrass west florida coastal waters Life Sciences Beckwith, Sean Thomas Byrne, Robert H. Hallock, Pamela Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
topic_facet |
carbonate-rich groundwater first-magnitude springs ocean acidification riverine calcium seagrass west florida coastal waters Life Sciences |
description |
Carbonate-rich groundwater discharged from springs, seeps, and spring-fed rivers on carbonate platforms creates environments of potential refuge for calcifying organisms in coastal waters by supplying higher [Ca2+] and [CO32-] along with typically lower nutrient concentrations. The benefits associated with carbonate terrains are maximized in the presence of submerged aquatic vegetation (SAV), especially seagrasses. To improve the accuracy of carbonate saturation state (Ω) determinations, calculated values of [CO32-] and Ksp∗ were paired with [Ca2+] values determined using a model that incorporates directly measured riverine calcium end-members (model A). This model results in Ω values larger than those calculated by assuming that [Ca2+] is directly proportional to salinity (model B; e.g., using CO2SYS, CO2calc). As an example, for salinity (S) between 13.5 and 24, improvements in saturation states calculated as differences (ΔΩ) between model A and model B saturation states in the tidal mixing zone of the Weeki Wachee River (Florida, United States) ranged from 0.39 to 1.00 (aragonite) and 0.61–1.65 (calcite). Saturation state ratios (Ω(A)/Ω(B)) for coastal waters with enhanced [Ca2+] originating from carbonate-rich groundwater can be calculated from end-member calcium concentrations and salinity. Applied to several river systems in the conterminous United States, Ω(A)/Ω(B) values calculated at S = 20 lead to Ω(A)/Ω(B) ratios of 1.12 (Weeki Wachee), 1.09 (Anclote), 1.06 (Mississippi), and 1.03 (Columbia). These increases in saturation states can be used to identify potential calcification refugia for subsequent high resolution field studies that focus on, for example, the long-term viability of oyster communities and other calcifying organisms in brackish coastal waters. |
format |
Article in Journal/Newspaper |
author |
Beckwith, Sean Thomas Byrne, Robert H. Hallock, Pamela |
author_facet |
Beckwith, Sean Thomas Byrne, Robert H. Hallock, Pamela |
author_sort |
Beckwith, Sean Thomas |
title |
Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
title_short |
Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
title_full |
Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
title_fullStr |
Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
title_full_unstemmed |
Riverine Calcium End-Members Improve Coastal Saturation State Calculations and Reveal Regionally Variable Calcification Potential |
title_sort |
riverine calcium end-members improve coastal saturation state calculations and reveal regionally variable calcification potential |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2019 |
url |
https://digitalcommons.usf.edu/msc_facpub/892 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=1912&context=msc_facpub |
long_lat |
ENVELOPE(156.400,156.400,68.817,68.817) |
geographic |
Sav’ |
geographic_facet |
Sav’ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/892 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=1912&context=msc_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766159130404323328 |