Biogeochemical data from surface sediments in the Porcupine Abyssal Plain
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2001
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| _version_ | 1867168863938936832 |
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| author | Danovaro, Roberto Dell'Anno, Antonio Fabiano, Mauro |
| author_facet | Danovaro, Roberto Dell'Anno, Antonio Fabiano, Mauro |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We investigated spatial and temporal changes in quantity, quality and bioavailability of organic matter in abyssal sediments of the northeastern Atlantic. Sediment samples were collected in the Porcupine Abyssal Plain (PAP, 4800 m depth) during 6 oceanographic cruises from September 1996 to October 1998 down to a depth of 15 cm. Sedimentary proteins, carbohydrates and lipids, and their enzymatically hydrolysable fractions showed significant temporal changes, but different biochemical classes displayed different temporal patterns. Total proteins, carbohydrates and lipids displayed high concentrations, whereas the potentially hydrolysable fractions accounted for only about 10% of their total pools. From September 1996 to October 1998, bioavailable organic carbon concentration in the sediments decreased about 10 gC/m**2 indicating that this benthic system was not steady state. Hydrolysed proteins and carbohydrates were characterised by different vertical patterns. Carbohydrates increased their relative significance with depth in the sediment indicating a shift of organic matter bioavailability with important trophodynamic implications for subsurface consumers. Vertical profiles of reactive and refractory organic carbon in PAP sediments indicate that organic matter bioavailability in deeper sediment layers is higher than expected from previous theoretical models. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_496681 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Biogeochemical data from surface sediments in the Porcupine Abyssal Plain Danovaro, Roberto Dell'Anno, Antonio Fabiano, Mauro Carbohydrates, hydrolyzable; Carbohydrates, hydrolyzable, standard deviation; Carbohydrates, total; Carbohydrates, total, standard deviation; Comment; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lipids, total; Lipids, total, standard deviation; MULT; Multiple investigations; PAP; Porcupine Abyssal Plain; Proteins, hydrolyzable; Proteins, hydrolyzable, standard deviation; Proteins, total; Proteins, total, standard deviation We investigated spatial and temporal changes in quantity, quality and bioavailability of organic matter in abyssal sediments of the northeastern Atlantic. Sediment samples were collected in the Porcupine Abyssal Plain (PAP, 4800 m depth) during 6 oceanographic cruises from September 1996 to October 1998 down to a depth of 15 cm. Sedimentary proteins, carbohydrates and lipids, and their enzymatically hydrolysable fractions showed significant temporal changes, but different biochemical classes displayed different temporal patterns. Total proteins, carbohydrates and lipids displayed high concentrations, whereas the potentially hydrolysable fractions accounted for only about 10% of their total pools. From September 1996 to October 1998, bioavailable organic carbon concentration in the sediments decreased about 10 gC/m**2 indicating that this benthic system was not steady state. Hydrolysed proteins and carbohydrates were characterised by different vertical patterns. Carbohydrates increased their relative significance with depth in the sediment indicating a shift of organic matter bioavailability with important trophodynamic implications for subsurface consumers. Vertical profiles of reactive and refractory organic carbon in PAP sediments indicate that organic matter bioavailability in deeper sediment layers is higher than expected from previous theoretical models. |
| title | Biogeochemical data from surface sediments in the Porcupine Abyssal Plain |
| topic | Carbohydrates, hydrolyzable; Carbohydrates, hydrolyzable, standard deviation; Carbohydrates, total; Carbohydrates, total, standard deviation; Comment; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lipids, total; Lipids, total, standard deviation; MULT; Multiple investigations; PAP; Porcupine Abyssal Plain; Proteins, hydrolyzable; Proteins, hydrolyzable, standard deviation; Proteins, total; Proteins, total, standard deviation |
| url | https://doi.org/10.1594/PANGAEA.496681 |