Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic
In a midoceanic region of the northeast Atlantic, patches of freshly deposited phytodetritus were discovered on the sea floor at a 4500 m depth in July/August 1986. The color of phytodetritus was variable and was obviously related to the degree of degradation. Microscopic analyses showed the presenc...
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Taylor & Francis
1989
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Online Access: | https://oceanrep.geomar.de/id/eprint/5942/ https://oceanrep.geomar.de/id/eprint/5942/1/01965581.1988.10749527.pdf https://doi.org/10.1080/01965581.1988.10749527 |
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ftoceanrep:oai:oceanrep.geomar.de:5942 2023-05-15T17:41:19+02:00 Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic Thiel, H. Pfannkuche, Olaf Schriever, G. Lochte, Karin Gooday, A.J. Hemleben, C. Mantoura, R.F.G. Turley, C.M. Patching, J.W. Riemann, F. 1989 text https://oceanrep.geomar.de/id/eprint/5942/ https://oceanrep.geomar.de/id/eprint/5942/1/01965581.1988.10749527.pdf https://doi.org/10.1080/01965581.1988.10749527 en eng Taylor & Francis https://oceanrep.geomar.de/id/eprint/5942/1/01965581.1988.10749527.pdf Thiel, H., Pfannkuche, O., Schriever, G., Lochte, K., Gooday, A. J., Hemleben, C., Mantoura, R. F. G., Turley, C. M., Patching, J. W. and Riemann, F. (1989) Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic. Open Access Biological Oceanography, 6 (2). pp. 203-239. DOI 10.1080/01965581.1988.10749527 <https://doi.org/10.1080/01965581.1988.10749527>. doi:10.1080/01965581.1988.10749527 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 1989 ftoceanrep https://doi.org/10.1080/01965581.1988.10749527 2023-04-07T14:51:58Z In a midoceanic region of the northeast Atlantic, patches of freshly deposited phytodetritus were discovered on the sea floor at a 4500 m depth in July/August 1986. The color of phytodetritus was variable and was obviously related to the degree of degradation. Microscopic analyses showed the presence of planktonic organisms from the euphotic zone, e.g., cyanobacteria, small chlorophytes, diatoms, coccolithophorids, silicoflagellates, dinoflagellates, tintinnids, radiolarians, and foraminifers. Additionally, crustacean exuviae and a great number of small fecal pellets, “minipellets,” were found. Although bacteria were abundant in phytodetritus, their number was not as high as in the sediment. Phytodetrital aggregates also contained a considerable number of benthic organisms such as nematodes and special assemblages of benthic foraminifers. Pigment analyses and the high content of particulate organic carbon indicated that the phytodetritus was relatively undegraded. Concentrations of proteins, carbohydrates, chloroplastic pigments, total adenylates, and bacteria were found to be significantly higher in sediment surface samples when phytodetritus was present than in equivalent samples collected at the same stations in early spring prior to phytodetritus deposition. Only the electron transport system activity showed no significant difference between the two sets of samples, which may be caused by physiological stress during sampling (decompression, warming). The chemical data of phytodetritus samples displayed a great variability indicative of the heterogeneous nature of the detrital material. The gut contents of various megafauna (holothurians, asteroids, sipunculids, and actiniarians) included phytodetritus showing that the detrital material is utilized as a food source by a wide range of benthic organisms. Our data suggest that the detrital material is partly rapidly consumed and remineralized at the sediment surface and partly incorporated into the sediment. Incubations of phytodetritus under simulated in situ ... Article in Journal/Newspaper Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
In a midoceanic region of the northeast Atlantic, patches of freshly deposited phytodetritus were discovered on the sea floor at a 4500 m depth in July/August 1986. The color of phytodetritus was variable and was obviously related to the degree of degradation. Microscopic analyses showed the presence of planktonic organisms from the euphotic zone, e.g., cyanobacteria, small chlorophytes, diatoms, coccolithophorids, silicoflagellates, dinoflagellates, tintinnids, radiolarians, and foraminifers. Additionally, crustacean exuviae and a great number of small fecal pellets, “minipellets,” were found. Although bacteria were abundant in phytodetritus, their number was not as high as in the sediment. Phytodetrital aggregates also contained a considerable number of benthic organisms such as nematodes and special assemblages of benthic foraminifers. Pigment analyses and the high content of particulate organic carbon indicated that the phytodetritus was relatively undegraded. Concentrations of proteins, carbohydrates, chloroplastic pigments, total adenylates, and bacteria were found to be significantly higher in sediment surface samples when phytodetritus was present than in equivalent samples collected at the same stations in early spring prior to phytodetritus deposition. Only the electron transport system activity showed no significant difference between the two sets of samples, which may be caused by physiological stress during sampling (decompression, warming). The chemical data of phytodetritus samples displayed a great variability indicative of the heterogeneous nature of the detrital material. The gut contents of various megafauna (holothurians, asteroids, sipunculids, and actiniarians) included phytodetritus showing that the detrital material is utilized as a food source by a wide range of benthic organisms. Our data suggest that the detrital material is partly rapidly consumed and remineralized at the sediment surface and partly incorporated into the sediment. Incubations of phytodetritus under simulated in situ ... |
format |
Article in Journal/Newspaper |
author |
Thiel, H. Pfannkuche, Olaf Schriever, G. Lochte, Karin Gooday, A.J. Hemleben, C. Mantoura, R.F.G. Turley, C.M. Patching, J.W. Riemann, F. |
spellingShingle |
Thiel, H. Pfannkuche, Olaf Schriever, G. Lochte, Karin Gooday, A.J. Hemleben, C. Mantoura, R.F.G. Turley, C.M. Patching, J.W. Riemann, F. Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
author_facet |
Thiel, H. Pfannkuche, Olaf Schriever, G. Lochte, Karin Gooday, A.J. Hemleben, C. Mantoura, R.F.G. Turley, C.M. Patching, J.W. Riemann, F. |
author_sort |
Thiel, H. |
title |
Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
title_short |
Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
title_full |
Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
title_fullStr |
Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
title_full_unstemmed |
Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic |
title_sort |
phytodetritus on the deep-sea floor in a central oceanic region of the northeast atlantic |
publisher |
Taylor & Francis |
publishDate |
1989 |
url |
https://oceanrep.geomar.de/id/eprint/5942/ https://oceanrep.geomar.de/id/eprint/5942/1/01965581.1988.10749527.pdf https://doi.org/10.1080/01965581.1988.10749527 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/5942/1/01965581.1988.10749527.pdf Thiel, H., Pfannkuche, O., Schriever, G., Lochte, K., Gooday, A. J., Hemleben, C., Mantoura, R. F. G., Turley, C. M., Patching, J. W. and Riemann, F. (1989) Phytodetritus on the deep-sea floor in a central oceanic region of the Northeast Atlantic. Open Access Biological Oceanography, 6 (2). pp. 203-239. DOI 10.1080/01965581.1988.10749527 <https://doi.org/10.1080/01965581.1988.10749527>. doi:10.1080/01965581.1988.10749527 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/01965581.1988.10749527 |
_version_ |
1766142800983752704 |