Explainers on the physics, chemistry and biology of temperate seas — marine heatwaves, upwelling, holdfast biology, trophic cascades, eDNA.
213 articles
ENSO forecasts steer decisions on kelp coasts months ahead. Here's how they're made, how far ahead they're skilled, and what they can't tell you.
Dr. Lena Fischer ·
Estuaries layer fresh water over salt in shifting gradients. How estuarine circulation works, where kelp's brackish limit lies, and why the river–sea edge matters.
Dr. Theo Nakamura ·
The euphotic zone is the sunlit skin of the sea where photosynthesis powers nearly all marine life. What defines it, how deep it runs, and why it matters.
Dr. Theo Nakamura ·
Fjords are drowned glacial valleys with a rock sill at the door. How that sill shapes circulation, deep-water renewal, anoxia risk — and why fjords shelter rich kelp.
Dr. Mara Ellison ·
Kelp survives storm forces that would snap rigid structures. The biomechanics of the holdfast, flexible stipes and drag-reducing blades — nature's offshore engineering.
Dr. Theo Nakamura ·
Beneath the surface tide runs a hidden one, pulsing cold nutrient-rich water onto reefs on a fortnightly beat. How the internal tide keeps kelp forests fed.
Dr. Lena Fischer ·
Internal waves arrive in packets of solitary giants, break underwater, and flood reefs with cold, nitrate-rich water. A field guide to the surf no one sees.
Dr. Lena Fischer ·
The ocean's biggest waves never break the surface. How internal waves ride the hidden boundary between water layers and deliver cold nutrients to kelp forests.
Dr. Lena Fischer ·
Kelp forests release iodine gases that seed coastal aerosol particles and change air chemistry. Here's what that really means for clouds — and what it doesn't.
Dr. Lena Fischer ·
Those bulbs along a kelp frond are gas bladders called pneumatocysts. Here's what's inside them, how kelp inflates them, and why a forest floats.
Dr. Theo Nakamura ·
Kelp doesn't just grow — it builds. As an ecosystem engineer, kelp reshapes light, flow, chemistry and shelter to create habitat for thousands of species.
Dr. Mara Ellison ·
Marine biogeography splits kelp coasts into distinct provinces, each with its own species and history. A tour of the regions — and the barriers that made them.
Dr. Mara Ellison ·
Kelp survives storms not by being strong but by being soft. How flexible stipes, streamlined blades and smart materials let kelp cheat drag — and where the design fails.
Dr. Lena Fischer ·
A kelp canopy is a living skylight — filtering intensity, colour and flicker for everything beneath it. How that sculpted light builds the understorey.
Dr. Mara Ellison ·
Kelp grows fast and dies young. Follow its carbon from sunlit blade to beach wrack, deep-sea fall and seafloor sediment — the full journey of kelp detritus.
Dr. Lena Fischer ·
Inside kelp tissue: alginate cell walls, laminarin energy stores, mannitol, iodine and pigments — the chemistry that feeds kitchens, clinics and industry.
Dr. Theo Nakamura ·
Kelp blades are packed with food — so why don't grazers eat them all? Inside the chemical arms race between brown algae and the herbivores that hunt them.
Dr. Theo Nakamura ·
Most kelp is never grazed standing. Here's how blades become crumbs, crumbs become food, and how detritus quietly powers reefs, canyons and the carbon ledger.
Dr. Mara Ellison ·
A full catalogue of kelp forest ecosystem services — fisheries, coastal protection, carbon, water quality, culture — and an honest look at valuation's limits.
Dr. Mara Ellison ·
Kelp endures waves that would snap a rigid mast by going with the flow. The biomechanics of flexibility, reconfiguration and drag trade-offs in storm survival.
Dr. Theo Nakamura ·
At dusk the kelp forest changes shifts: plankton rises, fish reposition, predators hunt the borders. The daily migrations that run the reef's nightly economy.
Dr. Mara Ellison ·
Kelp forests fix carbon at rates rivalling tropical rainforests. What primary production means, how fast kelp really grows, and how scientists measure it.
Dr. Theo Nakamura ·
Recruitment, grazer pressure, genetic diversity, canopy continuity: the measurable indicators ecologists use to predict whether a kelp forest will recover.
Dr. Mara Ellison ·
A kelp forest has a 24-hour soundtrack built by shrimp, rasping urchins and singing fish. Learn who the voices are and how scientists read health by ear.
Dr. Mara Ellison ·