Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Response of Meiofauna to Immediate Benthic Disturbance in the Central Indian Ocean Basin
Twenty-four stations (12 each, during pre- and postdisturbance studies) 5300 to 5330 m deep between 10°01' and 10°03'S latitude and between 75°59' and 76°02'E longitude were sampled to study the effect of benthic disturbance on the distribution of meiofauna in the Central Indian Ocean. Bottom-sampling was conducted with a box corer. Total meiofauna density ranged from 35 to 45 organisms per 10 cm2 of bottom area during the predisturbance period and 21 to 32 organisms per 10 cm2 during the postdisturbance period in the test and reference sites. Differences between pre- and postdisturbance study results were statistically significant (P < 0.05). Nematoda was the most abundant meta-zoan group, on an average representing >55% of the meiofaunal population. The abundance of nematodes and harpacticoid copepods as well as total meiofauna showed marked decreases during postdisturbance sampling. Vertical distribution of meiofauna in the sediment cores revealed that 75% to 90% of the metazoan population was confined to the top 2-cm layer of the sediment. Recolonization experiments suggest that harpacticoid copepods may take more time for recolonization than the nematodes and are more sensitive to the physical disturbance. These findings suggest that nematodes and harpacticoid copepods can be used as indicator organisms in recolonization experiments.
Response of Meiofauna to Immediate Benthic Disturbance in the Central Indian Ocean Basin
Twenty-four stations (12 each, during pre- and postdisturbance studies) 5300 to 5330 m deep between 10°01' and 10°03'S latitude and between 75°59' and 76°02'E longitude were sampled to study the effect of benthic disturbance on the distribution of meiofauna in the Central Indian Ocean. Bottom-sampling was conducted with a box corer. Total meiofauna density ranged from 35 to 45 organisms per 10 cm2 of bottom area during the predisturbance period and 21 to 32 organisms per 10 cm2 during the postdisturbance period in the test and reference sites. Differences between pre- and postdisturbance study results were statistically significant (P < 0.05). Nematoda was the most abundant meta-zoan group, on an average representing >55% of the meiofaunal population. The abundance of nematodes and harpacticoid copepods as well as total meiofauna showed marked decreases during postdisturbance sampling. Vertical distribution of meiofauna in the sediment cores revealed that 75% to 90% of the metazoan population was confined to the top 2-cm layer of the sediment. Recolonization experiments suggest that harpacticoid copepods may take more time for recolonization than the nematodes and are more sensitive to the physical disturbance. These findings suggest that nematodes and harpacticoid copepods can be used as indicator organisms in recolonization experiments.
Response of Meiofauna to Immediate Benthic Disturbance in the Central Indian Ocean Basin
Ingole, B. S. (Autor:in) / Ansari, Z. A. (Autor:in) / Rathod, V. (Autor:in) / Rodrigues, N. (Autor:in)
Marine Georesources & Geotechnology ; 18 ; 263-272
01.07.2000
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Response of Meiofauna to Immediate Benthic Disturbance in the Central Indian Ocean Basin
| Online Contents | 2000
Benthic Disturbance and Impact Experiments in the Central Indian Ocean Basin
| Online Contents | 2000
Benthic Disturbance and Impact Experiments in the Central Indian Ocean Basin
| Taylor & Francis Verlag | 2000
Microscale Response of Sediment Variables to Benthic Disturbance in the Central Indian Ocean Basin
| Taylor & Francis Verlag | 2000
Microscale Response of Sediment Variables to Benthic Disturbance in the Central Indian Ocean Basin
| Online Contents | 2000