Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean
<p dir="ltr">The study evaluated concentration, vertical distribution, and bioavailability of phosphorus fractions in the Indian Ocean core sediments. Sediment samples were collected from two sites in the Indian Ocean during January–February 2010 using gravity corer. Phosphorus fract...
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2022
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| _version_ | 1864513547874074624 |
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| author | Muhammed Nayeem Mullungal (21385463) |
| author2 | Sruthi Thalayappil (21385466) Sajna Peediyakkathodi (21385469) Palliparambil Michael Salas (21385472) Chenicherry House Sujatha (21385475) Chelakkal Sukumaran Ratheesh Kumar (21385478) |
| author2_role | author author author author author |
| author_facet | Muhammed Nayeem Mullungal (21385463) Sruthi Thalayappil (21385466) Sajna Peediyakkathodi (21385469) Palliparambil Michael Salas (21385472) Chenicherry House Sujatha (21385475) Chelakkal Sukumaran Ratheesh Kumar (21385478) |
| author_role | author |
| dc.creator.none.fl_str_mv | Muhammed Nayeem Mullungal (21385463) Sruthi Thalayappil (21385466) Sajna Peediyakkathodi (21385469) Palliparambil Michael Salas (21385472) Chenicherry House Sujatha (21385475) Chelakkal Sukumaran Ratheesh Kumar (21385478) |
| dc.date.none.fl_str_mv | 2022-08-24T09:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1007/s41742-022-00448-z |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Vertical_Distribution_of_Phosphorous_Fractions_and_Bioavailability_of_the_Nutrient_in_the_Southern_Indian_Ocean/29098436 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Earth sciences Oceanography Environmental sciences Soil sciences Phosphorous fractions Core sediments SEDEX method Bioavailability Indian Ocean |
| dc.title.none.fl_str_mv | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">The study evaluated concentration, vertical distribution, and bioavailability of phosphorus fractions in the Indian Ocean core sediments. Sediment samples were collected from two sites in the Indian Ocean during January–February 2010 using gravity corer. Phosphorus fractions in sediments were analyzed by a modified sequential extraction procedure (SEDEX). The vertical profile revealed silt and clay as dominant grain size fractions in both cores. The enriched levels of organic carbon were observed in samples due to adsorption on fine grained sediments. Loosely bound P was the most dominant fraction, and its higher concentration in sediments was due to increased productivity and subsequent inputs of biogenic components. Detritus from marine organisms and lower oxygen concentrations (depleted E<sup>h </sup>values) enhanced the production of authigenic P. The lower iron bound P fraction at specific depths was attributed to the nature of Fe minerals present within sediments. Decreased level of organic phosphate fraction was due to mineralization. The presence of Detrital P, the diagenetically stable form of P, might be due to inputs from the Himalayan, peninsular Indian, and Sri Lankan regions. The biogenic form was the dominant phosphate fraction throughout the cores suggesting the dissolution of fish debris. Estimated bioavailable phosphorous (BAP) ranged from 82.2 to 98.7% in Core I and from 90.21 to 92.98% in Core II, suggesting the fact that a major portion of the phosphate was bioavailable and hence the alterations in environmental conditions can release the BAP to water column resulting in nutrient enrichment.</p><h2>Other Information</h2><p dir="ltr">Published in: International Journal of Environmental Research<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1007/s41742-022-00448-z" target="_blank">https://dx.doi.org/10.1007/s41742-022-00448-z</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_4426e967791b8fc1417b60b67fc1d522 |
| identifier_str_mv | 10.1007/s41742-022-00448-z |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/29098436 |
| publishDate | 2022 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian OceanMuhammed Nayeem Mullungal (21385463)Sruthi Thalayappil (21385466)Sajna Peediyakkathodi (21385469)Palliparambil Michael Salas (21385472)Chenicherry House Sujatha (21385475)Chelakkal Sukumaran Ratheesh Kumar (21385478)Earth sciencesOceanographyEnvironmental sciencesSoil sciencesPhosphorous fractionsCore sedimentsSEDEX methodBioavailabilityIndian Ocean<p dir="ltr">The study evaluated concentration, vertical distribution, and bioavailability of phosphorus fractions in the Indian Ocean core sediments. Sediment samples were collected from two sites in the Indian Ocean during January–February 2010 using gravity corer. Phosphorus fractions in sediments were analyzed by a modified sequential extraction procedure (SEDEX). The vertical profile revealed silt and clay as dominant grain size fractions in both cores. The enriched levels of organic carbon were observed in samples due to adsorption on fine grained sediments. Loosely bound P was the most dominant fraction, and its higher concentration in sediments was due to increased productivity and subsequent inputs of biogenic components. Detritus from marine organisms and lower oxygen concentrations (depleted E<sup>h </sup>values) enhanced the production of authigenic P. The lower iron bound P fraction at specific depths was attributed to the nature of Fe minerals present within sediments. Decreased level of organic phosphate fraction was due to mineralization. The presence of Detrital P, the diagenetically stable form of P, might be due to inputs from the Himalayan, peninsular Indian, and Sri Lankan regions. The biogenic form was the dominant phosphate fraction throughout the cores suggesting the dissolution of fish debris. Estimated bioavailable phosphorous (BAP) ranged from 82.2 to 98.7% in Core I and from 90.21 to 92.98% in Core II, suggesting the fact that a major portion of the phosphate was bioavailable and hence the alterations in environmental conditions can release the BAP to water column resulting in nutrient enrichment.</p><h2>Other Information</h2><p dir="ltr">Published in: International Journal of Environmental Research<br>License: <a href="https://creativecommons.org/licenses/by/4.0" target="_blank">https://creativecommons.org/licenses/by/4.0</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1007/s41742-022-00448-z" target="_blank">https://dx.doi.org/10.1007/s41742-022-00448-z</a></p>2022-08-24T09:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1007/s41742-022-00448-zhttps://figshare.com/articles/journal_contribution/Vertical_Distribution_of_Phosphorous_Fractions_and_Bioavailability_of_the_Nutrient_in_the_Southern_Indian_Ocean/29098436CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/290984362022-08-24T09:00:00Z |
| spellingShingle | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean Muhammed Nayeem Mullungal (21385463) Earth sciences Oceanography Environmental sciences Soil sciences Phosphorous fractions Core sediments SEDEX method Bioavailability Indian Ocean |
| status_str | publishedVersion |
| title | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| title_full | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| title_fullStr | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| title_full_unstemmed | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| title_short | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| title_sort | Vertical Distribution of Phosphorous Fractions and Bioavailability of the Nutrient in the Southern Indian Ocean |
| topic | Earth sciences Oceanography Environmental sciences Soil sciences Phosphorous fractions Core sediments SEDEX method Bioavailability Indian Ocean |