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Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

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Related Experiment Video

Updated: May 21, 2025

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles

Published on: April 19, 2018

Particle-Associated Bacterioplankton Communities Across the Red Sea.

Larissa Frühe^1,2, Shannon G Klein¹, Carlos Angulo-Preckler¹

¹Marine Science Program, Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.

Environmental Microbiology

|March 18, 2025

Summary

Marine particle-associated bacterioplankton in the Red Sea show diverse communities, with distinct regional variations in the Southern Red Sea. This study reveals key microbial players in Red Sea ecosystems.

Keywords:

bacteria environmental genomics microbial communities microbial ecology

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Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology

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Published on: November 5, 2014

Area of Science:

Marine microbiology
Environmental DNA (eDNA) analysis
Red Sea ecosystems

Background:

Pelagic particle-associated bacterioplankton are vital for marine biogeochemical cycles.
Understanding Red Sea bacterioplankton diversity and dynamics is limited.
Unique environmental conditions of the Red Sea warrant specific microbial investigations.

Purpose of the Study:

To characterize bacterioplankton communities associated with pelagic particles in the Red Sea.
To assess the spatial and depth-related variability of these communities.
To provide insights into Red Sea microbial ecology.

Main Methods:

Environmental DNA (eDNA) metabarcoding was used for community characterization.
Sampling covered a 3D assessment from surface to 2300m depth.
Analysis spanned the full length of the eastern Red Sea.

Main Results:

Dominant bacterial phyla identified include Pseudomonadota, Cyanobacteriota, and Planctomycetota.
Significant spatial variability in community composition was observed across five Red Sea regions.
The Southern Red Sea exhibited a unique community composition, with a third of unique amplicon sequence variants.

Conclusions:

This study provides a comprehensive overview of Red Sea pelagic particle-associated bacterioplankton.
Spatial heterogeneity, particularly in the Southern Red Sea, is a key feature of these microbial communities.
Findings enhance understanding of microbial ecology and factors influencing Red Sea bacterioplankton.