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Ecological Intelligence / Subject

plankton

Peer-reviewed Global

Coastal browning changed plankton succession, then grazing erased much of the early signal

Evidence
Peer-reviewed
Geography
Controlled coastal mesocosm experiment
System
Coastal plankton food web

WHAT THE EVIDENCE SAYS

A 22-day mesocosm experiment manipulating colored dissolved organic matter and iron availability initially increased small phytoplankton despite lower light, but later treatment differences weakened after phytoplankton and microzooplankton declined under mesozooplankton grazing.

WHY IT MATTERS / OUR READ

Browning and micronutrient chemistry can alter early plankton succession without determining the final community trajectory; food-web interactions can override a strong bottom-up signal.

CAVEATS / UNCERTAINTY

This was a short controlled mesocosm experiment. The treatment chemistry simplifies natural catchment inputs, and the inferred food-web mechanism needs field validation across seasons and coastal systems.

SOURCE

Microbial Ecology
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EvidencePeer-reviewedGeographyControlled coastal mesocosm experimentSystemCoastal plankton food web WHAT THE EVIDENCE SAYS A 22-day mesocosm experiment manipulating colored dissolved organic matter and iron availability initially increased small phytoplankton despite

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Peer-reviewed Europe

New plankton imaging did not reproduce the old recorder’s numbers—and that is the point

Evidence
Peer-reviewed
Geography
North Sea
System
Marine plankton monitoring

WHAT THE EVIDENCE SAYS

The Pi-10 produced mean copepod abundances roughly 36 times higher than the Continuous Plankton Recorder and the datasets were not significantly correlated. The CPR better resolved taxonomic and latitudinal community structure, while imaging captured finer-scale abundance and size variation.

WHY IT MATTERS / OUR READ

Modern sensors can add information without being interchangeable with legacy monitoring. Overlapping deployments are essential when new technology could otherwise create a false ecological trend at the moment the instrument changes.

CAVEATS / UNCERTAINTY

The comparison covered two transects and device-specific catchability strongly shapes abundance. The imaging classifier exceeded 90% accuracy but still carries classification error, and biomass estimates rely on generalized allometry.

SOURCE

ICES Journal of Marine Science
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On two North Sea transects, a high-resolution Plankton Imager counted far more copepods than the Continuous Plankton Recorder while the two methods captured different spatial signals.

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Peer-reviewed Europe

Operational wind-farm noise changed plankton physiology in a 22-hour field microcosm

Evidence
Peer-reviewed
Geography
Norwegian coastal waters
System
Coastal plankton exposed to offshore-wind operational sound

WHAT THE EVIDENCE SAYS

A field microcosm experiment exposed natural plankton communities to recordings of operational offshore-wind-farm sound for about 22 hours. Phytoplankton growth and net oxygen balance were higher in sound-exposed bottles, while zooplankton grazing did not differ significantly. The study demonstrates a short-term physiological response under controlled exposure rather than a population- or ecosystem-level effect.

WHY IT MATTERS / OUR READ

The weak signal is that operational sound may interact with lower trophic levels in ways that conventional marine-noise assessments rarely measure. That deserves replication because plankton effects, if real at field scale, would sit far below the vertebrate endpoints that dominate current monitoring.

CAVEATS / UNCERTAINTY

This was a short bottle-scale experiment with one exposure regime. The direction of the response should not be labeled beneficial or harmful, and it does not establish effects on plankton populations, food webs or whole ecosystems around operating wind farms.

SOURCE

Scientific Reports · Original evidence
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Real offshore-wind recordings increased phytoplankton growth and net oxygen balance in short incubations, a result too small and short-term to classify as benefit or harm but difficult to ignore.

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