Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake
The amount of biogenic carbon that may be deposited, buried and eventually preserved (sequestered) in the sediments of a tropical, oligotrophic lake, was evaluated based on i) the temporal variation of the particulate organic carbon (POC) concentration in the superficial sediments in the deep zone o...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
PAGEPress Publications
2014-02-01
|
| Series: | Journal of Limnology |
| Subjects: | |
| Online Access: | http://www.jlimnol.it/index.php/jlimnol/article/view/783 |
| _version_ | 1828763905190526976 |
|---|---|
| author | Javier Alcocer Ana C. Ruiz-Fernández Elva Escobar Libia H. Pérez-Bernal Luis A. Oseguera Vilma Ardiles-Gloria |
| author_facet | Javier Alcocer Ana C. Ruiz-Fernández Elva Escobar Libia H. Pérez-Bernal Luis A. Oseguera Vilma Ardiles-Gloria |
| author_sort | Javier Alcocer |
| collection | DOAJ |
| description | The amount of biogenic carbon that may be deposited, buried and eventually preserved (sequestered) in the sediments of a tropical, oligotrophic lake, was evaluated based on i) the temporal variation of the particulate organic carbon (POC) concentration in the superficial sediments in the deep zone of lake Alchichica, Puebla, Mexico; and ii) the POC accumulation and preservation in a 210Pb-dated sediment core from the lake. In lake Alchichica the POC concentration in the surficial sediments ranged between 12 and 60 mg POC g-1 (25 ± 12 mg POC g-1 dry weight). The magnitude of the sedimented POC in Alchichica was high and mostly of autochthonous origin. The POC concentrations recorded in the sediment core (16.6 to 31.6 mg g-1 dry weight) were comparable to the concentration range observed in the surface sediment samples collected during the study period, which signaled a high POC preservation capacity in the sedimentary column of lake Alchichica. The POC fluxes, estimated from the 210Pb-dated sediment core, varied between 14.9 and 35.3 g m-2 year-1 within the past century; and the maximum POC losses through diagenesis during this period were estimated to be lower than 25%. This study concludes that deep tropical lakes, exemplified by lake Alchichica, accumulate and preserve most of the POC deposited, playing an important role in regional carbon balances. |
| first_indexed | 2024-12-11T02:10:22Z |
| format | Article |
| id | doaj.art-6d3bda0f53aa41caa9abea694d84b619 |
| institution | Directory Open Access Journal |
| issn | 1129-5767 1723-8633 |
| language | English |
| last_indexed | 2024-12-11T02:10:22Z |
| publishDate | 2014-02-01 |
| publisher | PAGEPress Publications |
| record_format | Article |
| series | Journal of Limnology |
| spelling | doaj.art-6d3bda0f53aa41caa9abea694d84b6192022-12-22T01:24:17ZengPAGEPress PublicationsJournal of Limnology1129-57671723-86332014-02-0173210.4081/jlimnol.2014.783610Deposition, burial and sequestration of carbon in an oligotrophic, tropical lakeJavier Alcocer0Ana C. Ruiz-Fernández1Elva Escobar2Libia H. Pérez-Bernal3Luis A. Oseguera4Vilma Ardiles-Gloria5Universidad Nacional Autónoma de México. Facultad de Estudios Superiores Iztacala. Proyecto de Investigación en Limnología TropicalUniversidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología. Unidad Académica MazatlánUniversidad Nacional Autónoma de México; Instituto de Ciencias del Mar y Limnología; Ecología Marina y Biodiversidad; Laboratorio de Biodiversidad y MacroecologíaUniversidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología. Unidad Académica MazatlánUniversidad Nacional Autónoma de México. Facultad de Estudios Superiores Iztacala. Proyecto de Investigación en Limnología TropicalUniversidad Nacional Autónoma de México. Facultad de Estudios Superiores Iztacala. Proyecto de Investigación en Limnología TropicalThe amount of biogenic carbon that may be deposited, buried and eventually preserved (sequestered) in the sediments of a tropical, oligotrophic lake, was evaluated based on i) the temporal variation of the particulate organic carbon (POC) concentration in the superficial sediments in the deep zone of lake Alchichica, Puebla, Mexico; and ii) the POC accumulation and preservation in a 210Pb-dated sediment core from the lake. In lake Alchichica the POC concentration in the surficial sediments ranged between 12 and 60 mg POC g-1 (25 ± 12 mg POC g-1 dry weight). The magnitude of the sedimented POC in Alchichica was high and mostly of autochthonous origin. The POC concentrations recorded in the sediment core (16.6 to 31.6 mg g-1 dry weight) were comparable to the concentration range observed in the surface sediment samples collected during the study period, which signaled a high POC preservation capacity in the sedimentary column of lake Alchichica. The POC fluxes, estimated from the 210Pb-dated sediment core, varied between 14.9 and 35.3 g m-2 year-1 within the past century; and the maximum POC losses through diagenesis during this period were estimated to be lower than 25%. This study concludes that deep tropical lakes, exemplified by lake Alchichica, accumulate and preserve most of the POC deposited, playing an important role in regional carbon balances.http://www.jlimnol.it/index.php/jlimnol/article/view/783Alchichicabiogenic carbonPOCchlorophyll atropical lakeMexico |
| spellingShingle | Javier Alcocer Ana C. Ruiz-Fernández Elva Escobar Libia H. Pérez-Bernal Luis A. Oseguera Vilma Ardiles-Gloria Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake Journal of Limnology Alchichica biogenic carbon POC chlorophyll a tropical lake Mexico |
| title | Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake |
| title_full | Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake |
| title_fullStr | Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake |
| title_full_unstemmed | Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake |
| title_short | Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake |
| title_sort | deposition burial and sequestration of carbon in an oligotrophic tropical lake |
| topic | Alchichica biogenic carbon POC chlorophyll a tropical lake Mexico |
| url | http://www.jlimnol.it/index.php/jlimnol/article/view/783 |
| work_keys_str_mv | AT javieralcocer depositionburialandsequestrationofcarboninanoligotrophictropicallake AT anacruizfernandez depositionburialandsequestrationofcarboninanoligotrophictropicallake AT elvaescobar depositionburialandsequestrationofcarboninanoligotrophictropicallake AT libiahperezbernal depositionburialandsequestrationofcarboninanoligotrophictropicallake AT luisaoseguera depositionburialandsequestrationofcarboninanoligotrophictropicallake AT vilmaardilesgloria depositionburialandsequestrationofcarboninanoligotrophictropicallake |