The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Micha Ilan - One of the best experts on this subject based on the ideXlab platform.
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Marine-Based Cultivation of Diacarnus Sponges and the Bacterial Community Composition of Wild and Maricultured Sponges and Their Larvae
Marine Biotechnology, 2011Co-Authors: Oded Bergman, Markus Haber, Boaz Mayzel, Matthew A. Anderson, Muki Shpigel, Russell T. Hill, Micha IlanAbstract:Marine organisms including sponges ( Porifera ) contain many structurally diverse bioactive compounds, frequently in a low concentration that hampers their commercial production. Two solutions to this problem are: culturing sponge explants for harvesting the desired compound and cultivation of sponge-associated bacteria. These bacteria (often considered the source of the desired compounds) include the Actinobacteria, from which many novel drugs were developed. In a long-term experiment (lasting 767 days), we evaluated the culture amenability of the sponge Diacarnus erythraenus in a Mariculture system, placed at 10- and 20-m depths. The growth and survival rates of sponge fragments were monitored. Wild and Maricultured sponges from both depths and their larvae were sampled at different time intervals for denaturing gradient gel electrophoresis (DGGE) profiling of the bacterial community residing within them. 16S rRNA gene sequences of both cultured bacterial isolates and clone libraries of unculturable bacteria were composed and compared, focusing on Actinobacteria. Sponges from both depths did not differ significantly either in mean growth rates (percent weight change year^−1 ± S.E.) (64.5% ± 21% at 10 m and 79.3% ± 19.1% at 20 m) or in seasonal growth rates. Survival was also very similar (72% at 10 m and 70% at 20 m). There were 88 isolates identified from adults and 40 from their larvae. The isolates and clone libraries showed diverse bacterial communities. The DGGE profiles of wild and Maricultured sponges differed only slightly, without a significant effect of depths or dates of sampling. This long-term experiment suggests that D. erythraenus probably remained healthy and indicates its Mariculture suitability.
Bin Yang - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal variations of biogenic elements and sources of sedimentary organic matter in the largest oyster Mariculture bay maowei sea southwest china
Science of The Total Environment, 2020Co-Authors: Bin Yang, Solomon Felix Dan, Dong Zhang, Riquan Liao, Zhiming Ning, Shiqiu PengAbstract:Abstract China is the largest Mariculture producer in the world, but detailed information on the spatiotemporal variations of biogenic elements and sources of sedimentary organic matter (SOM) via Mariculture is limited. The primary objective of this study was to assess the influence of Mariculture on the origin of SOM in relation with biogenic elements and geochemical paramaters due to the importance of SOM as a potential source of nutrients and energy in coastal marine environments. Surface sediments from the Maowei Sea were collected in August (summer) and December (winter), 2016 for grain size, total organic carbon (TOC), total nitrogen (TN), organic phosphorus (OP), biogenic silica (BSi), δ13C and δ15N analyses. Significant correlation (p 40% of the deposited SOM originates from terrestrial source during two seasons. The SOM from shellfish Mariculture was seasonal, mainly deposited in the intensive Mariculture areas, and its proportions were only higher than contributions from marine plankton in summer. Generally, this study indicates that shellfish biodepositions can significantly influence the cycle of carbon and other biogenic elements in the intensive Mariculture areas. Nevertheless, the overall dominance of terrestrial and marine SOM suggests that the sources of SOM and factors influencing carbon cycling in the Maowei Sea do not exclusively depend on the intensity of Mariculture activities.
Oded Bergman - One of the best experts on this subject based on the ideXlab platform.
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Marine-Based Cultivation of Diacarnus Sponges and the Bacterial Community Composition of Wild and Maricultured Sponges and Their Larvae
Marine Biotechnology, 2011Co-Authors: Oded Bergman, Markus Haber, Boaz Mayzel, Matthew A. Anderson, Muki Shpigel, Russell T. Hill, Micha IlanAbstract:Marine organisms including sponges ( Porifera ) contain many structurally diverse bioactive compounds, frequently in a low concentration that hampers their commercial production. Two solutions to this problem are: culturing sponge explants for harvesting the desired compound and cultivation of sponge-associated bacteria. These bacteria (often considered the source of the desired compounds) include the Actinobacteria, from which many novel drugs were developed. In a long-term experiment (lasting 767 days), we evaluated the culture amenability of the sponge Diacarnus erythraenus in a Mariculture system, placed at 10- and 20-m depths. The growth and survival rates of sponge fragments were monitored. Wild and Maricultured sponges from both depths and their larvae were sampled at different time intervals for denaturing gradient gel electrophoresis (DGGE) profiling of the bacterial community residing within them. 16S rRNA gene sequences of both cultured bacterial isolates and clone libraries of unculturable bacteria were composed and compared, focusing on Actinobacteria. Sponges from both depths did not differ significantly either in mean growth rates (percent weight change year^−1 ± S.E.) (64.5% ± 21% at 10 m and 79.3% ± 19.1% at 20 m) or in seasonal growth rates. Survival was also very similar (72% at 10 m and 70% at 20 m). There were 88 isolates identified from adults and 40 from their larvae. The isolates and clone libraries showed diverse bacterial communities. The DGGE profiles of wild and Maricultured sponges differed only slightly, without a significant effect of depths or dates of sampling. This long-term experiment suggests that D. erythraenus probably remained healthy and indicates its Mariculture suitability.
Shiqiu Peng - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal variations of biogenic elements and sources of sedimentary organic matter in the largest oyster Mariculture bay maowei sea southwest china
Science of The Total Environment, 2020Co-Authors: Bin Yang, Solomon Felix Dan, Dong Zhang, Riquan Liao, Zhiming Ning, Shiqiu PengAbstract:Abstract China is the largest Mariculture producer in the world, but detailed information on the spatiotemporal variations of biogenic elements and sources of sedimentary organic matter (SOM) via Mariculture is limited. The primary objective of this study was to assess the influence of Mariculture on the origin of SOM in relation with biogenic elements and geochemical paramaters due to the importance of SOM as a potential source of nutrients and energy in coastal marine environments. Surface sediments from the Maowei Sea were collected in August (summer) and December (winter), 2016 for grain size, total organic carbon (TOC), total nitrogen (TN), organic phosphorus (OP), biogenic silica (BSi), δ13C and δ15N analyses. Significant correlation (p 40% of the deposited SOM originates from terrestrial source during two seasons. The SOM from shellfish Mariculture was seasonal, mainly deposited in the intensive Mariculture areas, and its proportions were only higher than contributions from marine plankton in summer. Generally, this study indicates that shellfish biodepositions can significantly influence the cycle of carbon and other biogenic elements in the intensive Mariculture areas. Nevertheless, the overall dominance of terrestrial and marine SOM suggests that the sources of SOM and factors influencing carbon cycling in the Maowei Sea do not exclusively depend on the intensity of Mariculture activities.
Yang Yufeng - One of the best experts on this subject based on the ideXlab platform.
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Recruitment from an egg bank into the plankton in Baisha Bay, a Mariculture base in Southern China
Estuarine Coastal and Shelf Science, 2016Co-Authors: Qing Wang, Lei-lei Luan, Chen Liangdong, Dan-ni Yuan, Sheng Liu, Jiang-shiou Hwang, Yang YufengAbstract:Abstract The potential recruitment of resting eggs of calanoid copepods and rotifers to planktonic populations was investigated in the surface and sub-surface sediments of three Mariculture zones: an integrated seaweed Gracilaria lemaneiformis and shellfish cultivation area (G), a fish cultivation area (F), and a shellfish cultivation area (S), as well as the sediments of a nearby control sea area (C) in a Mariculture base in Southern China. The potential recruitment of copepod and rotifer eggs in the sediments of C and G was significantly higher than in F and S. Potential recruitment in the sub-surface sediments of F and S was not observed, suggesting that fish and shellfish Mariculture may be responsible for this decrease. The hatching success of resting eggs of copepods and rotifers was affected by Mariculture type, and that large-scale seaweed cultivation may offset the adverse effect of fish and shellfish cultivation on the resting eggs if integrated cultivation is adopted.