The relationship between various experimental concentrations of CO2 and calcification was studied by measuring Ca-45 incorporation into the crystalline matrix. Air containing CO2 at partial pressures (Pc02) of 0.04% to 5.5% was bubbled through synthetic sea water in incubation vessels. The resultant pH values ranged from 8.7 to 6.5. The relative concentrations ofCO2, HCO3 , and CO2— 3 were calculated from the measured ' pH—PCO2 combinations. Calcification was correlated positively with HCO expressed as percent of total carbon. Maximum calcification of about one—third above normal occurred between 0.1% and 1.0% P CCOO22 At 0.26% P calcification increased as increments of NaHCO3 in the range from CO2' 1 to 8 mM were added; this increase did not occur in the killed controls. The data suggest that calcification is controlled by a biological process that may be sensitive to pH and/or to the HCO3 concentration. The data also suggest that an increase in CO2 over the present atmospheric level would significantly increase calcification in this marine alga.
","abstract_html":"<p>The relationship between various experimental concentrations of CO2 and calcification was studied by measuring Ca-45 incorporation into the crystalline matrix. Air containing CO2 at partial pressures (Pc02) of 0.04% to 5.5% was bubbled through synthetic sea water in incubation vessels. The resultant pH values ranged from 8.7 to 6.5. The relative concentrations ofCO2, HCO3 , and CO2— 3 were calculated from the measured ' pH—PCO2 combinations. Calcification was correlated positively with HCO expressed as percent of total carbon. Maximum calcification of about one—third above normal occurred between 0.1% and 1.0% P CCOO22 At 0.26% P calcification increased as increments of NaHCO3 in the range from CO2' 1 to 8 mM were added; this increase did not occur in the killed controls. The data suggest that calcification is controlled by a biological process that may be sensitive to pH and/or to the HCO3 concentration. The data also suggest that an increase in CO2 over the present atmospheric level would significantly increase calcification in this marine alga.</p>","abstract_has_math":false,"creators":["Smith, A. Dwight"],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":["Ariel A. Roth","Arthur V. Chadwick","Conrad D. Clausen","Ivan G. Holmes","Elwood S. McCluskey"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1977,"date_issued":"1977-06-01T07:00:00Z","date_published":"1977-06-01T07:00:00Z","updated_at":"2026-07-24T02:53:20Z","subjects":["Biology","Botany","Coralline Algae; Calcification; Carbon Dioxide"],"languages":["English"],"rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsrepository.llu.edu/etd/947","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ariel A. Roth","Arthur V. Chadwick","Conrad D. Clausen","Ivan G. Holmes","Elwood S. McCluskey"]},{"key":"dc:creator","label":"Author","values":["Smith, A. Dwight"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology","Botany","Coralline Algae; Calcification; Carbon Dioxide"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsrepository.llu.edu/etd/947"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The relationship between various experimental concentrations of CO2 and calcification was studied by measuring Ca-45 incorporation into the crystalline matrix. Air containing CO2 at partial pressures (Pc02) of 0.04% to 5.5% was bubbled through synthetic sea water in incubation vessels. The resultant pH values ranged from 8.7 to 6.5. The relative concentrations ofCO2, HCO3 , and CO2— 3 were calculated from the measured ' pH—PCO2 combinations. Calcification was correlated positively with HCO expressed as percent of total carbon. Maximum calcification of about one—third above normal occurred between 0.1% and 1.0% P CCOO22 At 0.26% P calcification increased as increments of NaHCO3 in the range from CO2' 1 to 8 mM were added; this increase did not occur in the killed controls. The data suggest that calcification is controlled by a biological process that may be sensitive to pH and/or to the HCO3 concentration. The data also suggest that an increase in CO2 over the present atmospheric level would significantly increase calcification in this marine alga.
"]},{"key":"dc:title","label":"Title","values":["The Effect of Carbon Dioxide Concentration on Calcification in the Red Coralline Alga BOSSIELLA ORBIGNIANA"]}]}],"canonical_facts":{"dc:contributor":["Ariel A. Roth","Arthur V. Chadwick","Conrad D. Clausen","Ivan G. Holmes","Elwood S. McCluskey"],"dc:creator":["Smith, A. Dwight"],"dc:description.abstract":["The relationship between various experimental concentrations of CO2 and calcification was studied by measuring Ca-45 incorporation into the crystalline matrix. Air containing CO2 at partial pressures (Pc02) of 0.04% to 5.5% was bubbled through synthetic sea water in incubation vessels. The resultant pH values ranged from 8.7 to 6.5. The relative concentrations ofCO2, HCO3 , and CO2— 3 were calculated from the measured ' pH—PCO2 combinations. Calcification was correlated positively with HCO expressed as percent of total carbon. Maximum calcification of about one—third above normal occurred between 0.1% and 1.0% P CCOO22 At 0.26% P calcification increased as increments of NaHCO3 in the range from CO2' 1 to 8 mM were added; this increase did not occur in the killed controls. The data suggest that calcification is controlled by a biological process that may be sensitive to pH and/or to the HCO3 concentration. The data also suggest that an increase in CO2 over the present atmospheric level would significantly increase calcification in this marine alga.
"],"dc:identifier":["https://scholarsrepository.llu.edu/etd/947"],"dc:language":["English"],"dc:rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"dc:subject":["Biology","Botany","Coralline Algae; Calcification; Carbon Dioxide"],"dc:title":["The Effect of Carbon Dioxide Concentration on Calcification in the Red Coralline Alga BOSSIELLA ORBIGNIANA"],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T02:53:20Z"}