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Patterns in nematode community during and after experimentally induced anoxia in the northern Adriatic SeaTaheri, Mehrshad ...The effect of short and long-term induced anoxia on a benthic nematode community and its potential for recovery after reoxygenation were investigated in an in situ experiment on a silty-sand bottom ... in the Gulf of Trieste, the northern Adriatic Sea. Anoxia was created artificially by three underwater benthic Plexiglas chambers at a depth of 24 m. Treatments lasted for 2, 23 and 307 days. Control samples (Normoxia) were taken on 3 (Normoxia 1) and 25 (Normoxia 2) August 2010 outside the chambers (4 e5 m further). After opening the chambers, recovery cores were taken after 7 days (Anoxia 2D), 30 days (Anoxia 23D) and 90 days (Anoxia 307D). Our results revealed that short-term anoxia (Anoxia 2D) did not affect nematode total density and diversity, community structure and their vertical distribution in the sediment. However, total and vertical nematode density, species richness and diversity decreased at 23 days and decreased further at 307 days anoxia. Some nematode species like Metalinhomoeus effilatus, Paralinhomoeus caxinus and Terschellingia longicaudata even survived at 307 days anoxia treatment. Our results also demonstrated that nematode community exposed to 23 days anoxia did not recover after 30 days sediment reoxygenation but, a full recovery was observed after 90 days for nematode community exposed to 307 days anoxia. Feeding type contribution (functional aspect) of the nematode community also changed at the anoxia treatments and during the recovery process. This change was most drastic at the Anoxia 23D and 307D treatments. At both Normoxia and Anoxia 2D treatments, selective deposit feeders (1A), non-selective deposit feeders (1B) and epistrate (diatom) feeders (2A) nematodes were observed in the dominant nematode community. Epistrate feeders disappeared from in the Anoxia 23D treatment epistrate and also selective deposit feeders did not belong to the dominant nematode species in the Anoxia 307D treatment. After the recovery process, epistrate feeders and selective deposit feeding nematodes reappeared again amongst the dominant nematode species after 30 and 90 days of recovery, respectively.Source: Marine environmental research. - ISSN 0141-1136 (Vol. 110, 2015, str. 110-123)Type of material - article, component partPublish date - 2015Language - englishCOBISS.SI-ID - 3560783
Author
Taheri, Mehrshad |
Grego, Mateja |
Riedel, Bettina |
Vincx, Magda |
Vanaverbeke, Jan
Topics
morje |
biotski indeksi |
bentos |
nematode |
obalno morje |
okoljski kazalci |
anoksija |
coastal waters |
marine nematodes |
nematodes |
anoxia |
Adriatic sea |
Gulf of Trieste |
Nematoda
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Taheri, Mehrshad | |
Grego, Mateja | 26087 |
Riedel, Bettina | |
Vincx, Magda | |
Vanaverbeke, Jan |
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