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3 results on '"Red Sea plankton"'

1. Vertical distribution of zooplankton in the epipelagic zone off Sharm El-Sheikh, Red Sea, Egypt

Author

Mahnoud Hassan Hanafi, Mohsen Mohamed Elsherbiny, and Mohamed Moussa Dorgham

Subjects
Hydrography, Copepods, Red Sea plankton, Sharm EL-Sheikh plankton, Zooplankton dynamics, Epipelagic zone, Vertical plankton, Chaetognatha, Appendicularia, Oceanography, GC1-1581
Abstract

The purpose of the present study was to track the seasonal vertical distribution of zooplankton abundance in the epipelagic zone off Sharm El-Sheikh, Red Sea. Zooplankton samples were collected seasonally within the depth ranges of 0-25, 25-50, 50-75, 75-100 m at a single station off Sharm El-Sheikh City. The present study is a trial to expand knowledge about the structure as well as the vertical distribution of the epipelagic zooplankton community in the Gulf of Aqaba in general and in its southern part in particular. The results indicate the occurrence of 52 copepod species and several species of other planktonic groups in the study area; the zooplankton standing crop fluctuated between 1124 and 4952 organisms m-3. Copepods appeared to be the predominant component, forming an average of 86.5% of the total zooplankton count, and with other groups demonstrated a markedly different seasonal vertical distribution. Twelve bathypelagic copepod species were reported during the present study, and five species were new to the area, having migrated northwards from the main basin of the Red Sea.

Published
2012

2. Sequencing effort dictates gene discovery in marine microbial metagenomes

Author

Duarte, Carlos M., Ngugi, David K., Alam, Intikhab, Pearman, John, Kamau, Allan, Eguiluz, Victor M., Gojobori, Takashi, Acinas, Silvia G., Gasol, Josep M., Bajic, Vladimir, Irigoien, Xabier, Duarte, Carlos M., Ngugi, David K., Alam, Intikhab, Pearman, John, Kamau, Allan, Eguiluz, Victor M., Gojobori, Takashi, Acinas, Silvia G., Gasol, Josep M., Bajic, Vladimir, and Irigoien, Xabier

Abstract

© 2020 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. Massive metagenomic sequencing combined with gene prediction methods were previously used to compile the gene catalogue of the ocean and host-associated microbes. Global expeditions conducted over the past 15 years have sampled the ocean to build a catalogue of genes from pelagic microbes. Here we undertook a large sequencing effort of a perturbed Red Sea plankton community to uncover that the rate of gene discovery increases continuously with sequencing effort, with no indication that the retrieved 2.83 million non-redundant (complete) genes predicted from the experiment represented a nearly complete inventory of the genes present in the sampled community (i.e., no evidence of saturation). The underlying reason is the Pareto-like distribution of the abundance of genes in the plankton community, resulting in a very long tail of millions of genes present at remarkably low abundances, which can only be retrieved through massive sequencing. Microbial metagenomic projects retrieve a variable number of unique genes per Tera base-pair (Tbp), with a median value of 14.7 million unique genes per Tbp sequenced across projects. The increase in the rate of gene discovery in microbial metagenomes with sequencing effort implies that there is ample room for new gene discovery in further ocean and holobiont sequencing studies.

Published
2020

3. Sequencing effort dictates gene discovery in marine microbial metagenomes

Author

<p>King Abdullah University of Science and Technology National Institutes of Health Spanish Ministry of Science and Innovation</p>, Duarte, Carlos M., Ngugi, David K., Alam, Intikhab, Pearman, John, Kamau, Allan, Eguiluz, Victor M., Gojobori, Takashi, Acinas, Silvia G., Gasol, Josep M., Bajic, Vladimir, Irigoien, Xabier, <p>King Abdullah University of Science and Technology National Institutes of Health Spanish Ministry of Science and Innovation</p>, Duarte, Carlos M., Ngugi, David K., Alam, Intikhab, Pearman, John, Kamau, Allan, Eguiluz, Victor M., Gojobori, Takashi, Acinas, Silvia G., Gasol, Josep M., Bajic, Vladimir, and Irigoien, Xabier

Abstract

Duarte, C. M., Ngugi, D. K., Alam, I., Pearman, J., Kamau, A., Eguiluz, V. M., ... Irigoien, X. (2020). Sequencing effort dictates gene discovery in marine microbial metagenomes. Environmental Microbiology, 22(11), 4589-4603. https://doi.org/10.1111/1462-2920.15182

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