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Since the “Talling integral” was not directly applicable, alternative models based on subsurface productivity maxima position and height were assessed; one predicted Lp within 10% of planimetric measurements in all cases.",{"@graph":14,"@context":65},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/coastal-lagoons-radiocarbon-uptake-productivity-calculation-models/316586/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/coastal-lagoons-radiocarbon-uptake-productivity-calculation-models/316586.png","ImageObject",300,407,{"name":42,"@type":43},"Ivy","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-04","2026-09-20",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",5,{"@type":57,"mainEntity":58},"FAQPage",[59],{"name":60,"@type":61,"acceptedAnswer":62},"What level of predictive accuracy did the best model achieve?","Question",{"text":63,"@type":64},"One model predicted total daily 14C productivity (Lp) to within 10% of planimetric measurements across all cases in the study.","Answer","https://schema.org",{"og:url":32,"og:type":67,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":69,"canonical":32},"index,follow",{"doc_id":71,"site_id":7},316586,1791701391,{"code":4,"msg":74,"data":75},"success",[76,80,84,88,92,97,102,106,111,114,118],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":77,"show_sort_weight":78,"slug":79},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":81,"show_sort_weight":82,"slug":83},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Exam",70,"exam",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Comic",60,"comic",{"id":93,"doc_module":4,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},6,"Technology",50,"technology",{"id":98,"doc_module":4,"doc_module_name":25,"category_name":99,"show_sort_weight":100,"slug":101},7,"Healthcare",40,"healthcare",{"id":103,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":104,"slug":105},8,30,"research-report",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":108,"show_sort_weight":109,"slug":110},9,"Religion & Spirituality",20,"religion-spirituality",{"id":109,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":109,"slug":113},"World Cup","world-cup",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":115,"slug":117},10,"Lifestyle","lifestyle",{"id":119,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":55,"slug":121},19,"General","general",{"code":4,"msg":74,"data":123},{"doc_id":71,"user_id":124,"nickname":42,"user_avatar":125,"doc_module":4,"category_id":103,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":126,"file_id":127,"file_url":128,"file_type":129,"file_size":130,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":131,"language":132,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":133,"faqs":134,"seo_title":135,"seo_description":12,"update_tm":136,"read_time":137,"preview_page_count":4},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","Rev. Biol. Trop. , 35(2): 183-193, 1987.  \nThe application of calculation models for estimating primary productivity in two topical Mexican coastal lagoons  \nLaurence D. Mee  \nInstituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apdo. Postal 70-305, 045 10-México, D . F . MEXICO.  \nPresent addres: International Laboratory of Marine Radioaetivity, IAEA, Musée Oeeanographique. Mónaco.  \n(Reeeived January 10, 1986)  \nAbstraet: Data from detailed radioearbon uptake studies of two turbid and highly productive Mexican tropical coastal lagoons with distinct ecological environments were used to evaluate and adapt calculation models for the integration of total daily 14 C productivity (Lp). For such environments, the precision of the conventional methodology does not permit reliable estimates of Ik from the low light regions of p/I curves. Sinee the widely used \"Talling integral\" was thus not directly applicable, alternative solutions which only require knowledge of the position and height of the subsurfaee productivity maximum were evaluated.One of these models was found to predict Lp to within 10% of planimetric measurements in all cases. Suggestions are given for practical application of this model and for its future development in association with the assimilation number concept.  \nRadiocarbon uptake experiments are widely employed for the estimation of primary productivity in the marine environment. Much attention has been given to the refinement of experimental details and assay techniques, particularly in the ocean and lake environments. The LB.P. program handbook (Vollenweider 1974) provides an excellent practical résumé of these.  \nIn order to apply conventional 14C methods to highly productive and turbid environments such as coastal lagoons, sorne difficulties are encountered. The most significant of these result from the use of long incubation periods which give low estimates of productivity and from clogging of ftlters with suspended particulate material, making impracticable the use of Geiger-Müller counters. The refmements introduced by Fernández et al. (l 979) avoid these pitfalls by employing several l-hour incubation periods and utilizing the scintillation counting of small samples. Though this technique gives reliable in-situ estimates of daily productivity, it limits these measurements to one per day and requires a considerable effort in the field and an  \nabundant supply of materials. The present study evaluates the use of productivity models in order to reduce to a minimun the time required for estimating 14 C productivity in highly productive and turbid environments.  \nMETHODS  \nAll radiocarbon uptake experiments were made in 1976 as part of a wider study of the chemistry and hydrography of the tropical coastal lagoons of Guerrero State , Mexico (Mee 1977) . The data were obtained from centrally located stations in the Chautengo lagoon (station 3, Mee 1977) and the Mitla lagoon (Camelote basin) . Full descriptions of these lagoons are given by Mee (l977 , 1978) .  \nRESULTS  \nMost productivity curves show significant surface mid-day light inhibition (Figures 1,2) . The curves tend to be roughly symmetrical and any assymetry can usually be explained by one or more of the following criteria:  \n184  \n.  \n.J;  \n..,  \nI  \nE U  \nO>  \nE  \nCl:  \n.c  \n..,  \nI  \nE U  \nO>  \nE  \nCl:  \nREVISTA DE BIOLOGIA TROPICAL  \n700  \n8 Moy ' 9 76 z. = 0. 30m  \n600  \n500  \n400  \n300  \n=-  \n.  \n.J;  \n..,  \n.  \nE U  \nO>  \nE  \nCl:  \n200  \n100  \n1.5 m  \nO  \n06°0 09°° 12 ° ° 150 ° 180 °  \nTi m e  \n600  \n5 November ' 9 76 Zs = 0. 50 m  \n500  \n400  \n300  \n200  \n.,  \n.J;  \n..,  \n,  \nE  \nU  \nO>  \nE  \nCl:  \nO. 􀀿m  \n100  \n1. 0 m  \nO  \n06 °° 09°° 12 ° ° 15 °0 1800  \nT i m e  \n700  \n9 September '976 z . = 0. 3 0 m  \n600  \n500  \n400  \n30 0  \n20 0  \n100  \n1.0 m  \nO  \n06 ° · O g oo 12 o o 15 °° 18 0 °  \nT i m e  \n600  \n7 December ' 9 76 Z  \n500  \n40 0  \n300  \n200  \n100  \nO  \ns  \n= 0. 3 8 m  \n06 0 o Og oo 12 00 150 • 18·•  \nT","cbCaipF8IXKHQ4su","https://ap.wps.com/l/cbCaipF8IXKHQ4su","pdf",1980535,11,"English","# Methods\n## Radiocarbon uptake experiments and study sites\n# Results\n## Light inhibition and explanations\n# Productivity model framework\n## Instantaneous production rate and integrated productivity\n## Optimum production and extinction coefficient","[{\"question\":\"What level of predictive accuracy did the best model achieve?\",\"answer\":\"One model predicted total daily 14C productivity (Lp) to within 10% of planimetric measurements across all cases in the study.\"}]","Coastal lagoons radiocarbon uptake productivity calculation models | PDF",1789919118,28]