Carbon fixation rates in groundwater similar to those in oligotrophic marine systems

WA Overholt, S Trumbore, X Xu, TLV Bornemann… - Nature …, 2022 - nature.com
The terrestrial subsurface contains nearly all of Earth's freshwater reserves and harbours the
majority of our planet's total prokaryotic biomass. Although genetic surveys suggest these …

Viruses affect picocyanobacterial abundance and biogeography in the North Pacific Ocean

MCG Carlson, F Ribalet, I Maidanik, BP Durham… - Nature …, 2022 - nature.com
The photosynthetic picocyanobacteria Prochlorococcus and Synechococcus are models for
dissecting how ecological niches are defined by environmental conditions, but how …

[HTML][HTML] Seasonal-to-decadal scale variability in primary production and particulate matter export at Station ALOHA

DM Karl, RM Letelier, RR Bidigare, KM Björkman… - Progress in …, 2021 - Elsevier
Abstract Station ALOHA (A Long-term Oligotrophic Habitat Assessment) was established in
the North Pacific Subtropical Gyre (22° 45′ N, 158° W) as an oligotrophic ocean …

Phycosphere pH of unicellular nano-and micro-phytoplankton cells and consequences for iron speciation

F Liu, M Gledhill, QG Tan, K Zhu, Q Zhang… - The ISME …, 2022 - academic.oup.com
Surface ocean pH is declining due to anthropogenic atmospheric CO2 uptake with a global
decline of~ 0.3 possible by 2100. Extracellular pH influences a range of biological …

Combined pigment and metatranscriptomic analysis reveals highly synchronized diel patterns of phenotypic light response across domains in the open oligotrophic …

KW Becker, MJ Harke, DR Mende, D Muratore… - The ISME …, 2021 - academic.oup.com
Sunlight is the most important environmental control on diel fluctuations in phytoplankton
activity, and understanding diel microbial processes is essential to the study of oceanic …

Temporal and vertical variability in picophytoplankton primary productivity in the North Pacific Subtropical Gyre

YM Rii, DM Karl, MJ Church - Marine Ecology Progress Series, 2016 - int-res.com
Picophytoplankton (≤ 3 µm) are major contributors to plankton biomass and primary
productivity in the subtropical oceans. We examined vertical and temporal variability of …

Temporal dynamics of total microbial biomass and particulate detritus at Station ALOHA

DM Karl, KM Björkman, MJ Church, LA Fujieki… - Progress in …, 2022 - Elsevier
Abstract Particulate adenosine-5′-triphosphate (P-ATP) and particulate carbon (PC)
concentrations were measured on approximately monthly intervals throughout the upper …

A year in the life of the Eastern Mediterranean: Monthly dynamics of phytoplankton and bacterioplankton in an ultra-oligotrophic sea

T Reich, T Ben-Ezra, N Belkin, A Tsemel… - Deep Sea Research …, 2022 - Elsevier
Abstract The Eastern Mediterranean Sea (EMS) is a poorly studied ultra-oligotrophic marine
environment, dominated by small-size phyto-and bacterioplankton. Here, we describe the …

Productivity diagnosed from the diel cycle of particulate carbon in the North Pacific Subtropical Gyre

AE White, B Barone, RM Letelier… - Geophysical Research …, 2017 - Wiley Online Library
The rate of primary production (PP) in the ocean is a critical ecosystem function that
contributes to the regulation of air‐sea CO2 exchange. Historically, oceanographers have …

Mixotrophic metabolism by natural communities of unicellular cyanobacteria in the western tropical South Pacific Ocean

S Duhamel, F Van Wambeke, D Lefevre… - Environmental …, 2018 - Wiley Online Library
Cyanobacteria are major contributors to ocean biogeochemical cycling. However,
mixotrophic metabolism and the relative importance of inorganic and organic carbon …