There is growing interest in the scientific community and private sector in biological approaches to marine carbon dioxide removal, strategies designed to enhance the ocean’s natural ability to absorb carbon from the atmosphere. However, a study led by Megan Sullivan, a postdoctoral researcher in the University of Rhode Island’s Graduate School of Oceanography (GSO), suggests that some proposals may overlook an important factor.

“Most conversations only focus on how much carbon sinks out of the surface ocean,” said Sullivan. “We show that it’s just as important to consider how nutrients cycle through the system. Understanding these differences will help scientists better predict how effective ocean-based climate interventions might be over decades or centuries.”

One widely discussed carbon removal approach is ocean fertilization, particularly adding iron to certain regions of the ocean to stimulate phytoplankton growth. Like planting trees on land, the idea is that increased growth will pull more carbon dioxide from the atmosphere. This biologically captured carbon then sinks to the deep ocean, where it can remain stored for decades to centuries.

Sullivan and her colleagues developed a modeling framework to run large-scale ocean simulations on high-performance computing systems. Their model tracked how both carbon and phosphorus, a key nutrient required for phytoplankton growth, move through the ocean over time. Because carbon uptake is tightly linked to nutrient availability, the simulations helped the researchers understand how carbon and nutrient cycles interact.

They found that carbon and nutrients do not follow the same timeline. Biologically captured carbon may return to the surface ocean relatively quickly, while nutrients such as phosphorus remain trapped in the deep ocean for much longer.

“This mismatch matters,” Sullivan explained. “If nutrients like phosphorus are locked away in the deep ocean, phytoplankton growth is suppressed, reducing the ocean’s ability to continue absorbing carbon dioxide.” The team describes this as a potential “productivity hangover,” where an initial boost in carbon uptake is followed by a longer-term slowdown. In other words, an intervention that appears successful in the short term may not deliver sustained climate benefits.

The findings suggest that some proposed marine carbon removal strategies, including iron fertilization, could overestimate their long-term impact if they focus only on carbon export without accounting for nutrient redistribution. As interest grows in ocean-based carbon removal projects, understanding these long-term nutrient feedbacks will be critical for accurately assessing climate benefits.

Sullivan’s research, which began as part of her Ph.D. dissertation at the University of California, Irvine and has continued at URI as a postdoctoral fellow, was published in the journal PNAS in February. At UC Irvine, Sullivan worked closely with her advisors, François Primeau and Adam Martiny. At URI, Sullivan worked with Keisuke Inomura, an assistant professor of oceanography, to further develop and refine her manuscript.

Source: University of Rhode Island | Original Press Release

Study: Sullivan, M.R., Primeau, F.W., Seo, H., Camps-Castellà, J., Inomura, K., Martiny, A.C. (2026). Decoupled timescales of organic carbon and phosphorus recycling in the global ocean. Proceedings of the National Academy of Sciences, 123(8), e2514991123. https://doi.org/10.1073/pnas.2514991123

Editor’s Note: Why We Are Featuring Iran Now

Iran is once again dominating headlines.

From widespread public demonstrations that surged across Iran in late 2025 into early this year, to the current escalation and the breaking of war, the country is being discussed globally in the context of politics, conflict, and human suffering. The loss of life and instability unfolding are real and devastating. Nothing in this feature is intended to diminish that reality.

But there is something else that often goes unspoken.

For years, inside and outside of environmental circles, people have quietly asked me a question. Sometimes with curiosity. Sometimes with hesitation. Sometimes almost with guilt.

“What is actually there?”

They were referring to biodiversity.

In today’s world, there is pressure to already know. When the breadth of human knowledge appears to sit at our fingertips, asking basic questions can feel uncomfortable. If a place overlaps with your professional field or your moral concern, you are expected to understand it fully.

Curiosity, however, should never carry shame.

At SEVENSEAS Media, we see questions as bridges. When a region becomes defined only by conflict, it becomes even more important to remember that it is also defined by landscapes, species, ecosystems, culture, and people who have lived in relationship with nature for millennia.

Iran is not only a geopolitical flashpoint. It is a country of vast mountain ranges, ancient forests, wetlands, deserts, coral communities, migratory flyways, and one of the most strategically significant marine corridors in the world. It sits at the intersection of terrestrial and marine biodiversity, connecting ecosystems across Central Asia, the Caucasus, the Arabian Peninsula, and the Indian Ocean.

It is home to coastal communities whose fishing traditions stretch back centuries, to wetlands that host migratory birds crossing continents, and to marine systems that sustain life far beyond their shorelines.

This feature has been in development for some time. In light of current events, we believe it is important to move forward thoughtfully and with care.

Education is not a distraction from suffering. It is part of long term resilience.

At SEVENSEAS Media, we promote education and peace across cultures and living in harmony with nature. We believe that understanding biodiversity can humanize places that are otherwise reduced to headlines. Conservation, at its best, transcends politics and builds shared responsibility for the natural world.

In the articles that follow, we explore the geography of Iran, its terrestrial biodiversity, its migratory importance, and its ocean and coastal ecosystems. We touch on traditional fishing cultures, current pressures, conservation challenges, and the organizations working to protect what remains.

As always, we are not here to simplify complexity. We are here to make space for informed curiosity and careful understanding.

In moments of conflict, it can feel easier to look away. We choose instead to look closer, and to recognize that ecological systems persist regardless of political borders.

This story is developing rapidly. Details may shift as the situation evolves. Last verified: March 3, 2026.

The headlines are dominated by oil prices, geopolitical brinkmanship, and military escalation. But below the waterline of the Persian Gulf, a quieter catastrophe is taking shape, one that will outlast any ceasefire.

The Persian Gulf is not the barren petrochemical corridor that its reputation might suggest. It is a semi-enclosed sea of roughly 241,000 square kilometres, averaging just 35 metres in depth, connected to the wider Indian Ocean only through the 56-kilometre-wide Strait of Hormuz. Within this shallow, hypersaline basin lives a marine community that has adapted to conditions most ocean species could not survive: summer surface temperatures regularly exceeding 35°C, salinity levels above 45 PSU, and winter cooling that can plunge below 18°C. The organisms that thrive here are not merely surviving. They are demonstrating resilience strategies that climate scientists around the world are studying with increasing urgency.

Approximately 60 species of reef-building coral have been documented in the Gulf, including the endemic Acropora arabensis, found nowhere else on Earth. These corals withstand water temperatures of up to 36°C, well beyond the 32°C threshold that triggers bleaching in most tropical reefs. Researchers have increasingly turned to Persian Gulf coral populations as living laboratories for understanding how reef organisms might adapt to a warming planet. The Gulf also supports the world’s second-largest population of dugongs, after northern Australia, with an estimated 7,500 individuals grazing on seagrass beds along the coasts of Qatar, Bahrain, the UAE, and Saudi Arabia. Over 700 species of fish, populations of hawksbill and green sea turtles, Indo-Pacific humpback dolphins, whale sharks, and migratory seabird colonies all depend on this ecosystem.

The Immediate Threats

The environmental risks now facing this ecosystem are layered and compounding.

Oil contamination is the most visible concern. At least three commercial tankers have been struck by projectiles, with one confirmed ablaze and producing thick plumes of black smoke near Omani waters. A burning tanker does not simply release crude oil; it generates a toxic cocktail of partially combusted hydrocarbons, heavy metals, and particulate matter that settles across surrounding waters. With more than 150 laden tankers now anchored in open Gulf waters, the risk of collision, grounding, or further military targeting grows with each passing day. The shallow depth of the Gulf, averaging just 36 metres, means that spilled oil reaches the seafloor and coastal habitats far more quickly than in open ocean environments.

The sinking of at least nine Iranian warships introduces a different category of pollution. Sunken military vessels carry bunker fuel, hydraulic oils, lubricants, and munitions, all of which corrode and leach into surrounding waters over years and decades. A 2023 IUCN brief estimated that globally, over 8,500 shipwrecks are at risk of leaking approximately six billion gallons of oil. The Persian Gulf’s warm, shallow conditions accelerate corrosion, meaning these newly sunken warships could begin releasing contaminants faster than wrecks in colder, deeper waters.

Underwater noise pollution from military operations, including sonar, detonations, and sustained engine activity from hundreds of anchored vessels, adds biological stress. Marine mammals such as dugongs and dolphins rely on acoustic communication for feeding, mating, and navigation. Prolonged noise disruption can displace populations from critical habitats, with consequences that persist long after the sound stops.

Reports of potential mine-laying by Iranian forces introduce yet another dimension. Naval mines are indiscriminate by design; they threaten not only vessels but also the seabed itself, disturbing sediment and destroying benthic habitats when detonated. GPS jamming, confirmed across the region, increases the likelihood of navigational accidents among the hundreds of ships now attempting to shelter in place.

History’s Warning

The Persian Gulf carries the scars of previous conflicts. During the 1991 Gulf War, an estimated 4 to 11 million barrels of crude oil were deliberately released into its waters, covering more than 600 kilometres of Saudi coastline. Research conducted by Jacqueline Michel in 2010 found that oil had penetrated up to 50 centimetres into Gulf sediments and remained detectable 12 years after the spill. A 2017 study by Joydas et al. found “alarming levels” of hydrocarbons persisting in secluded bay areas more than 25 years later. While fish and bird populations showed encouraging recovery by 1994, the long-term contamination of sediments and coastal habitats tells a more complicated story.

The Gulf ecosystem did recover from 1991, a testament to its remarkable resilience. But it recovered into a world with fewer stressors. Today, the same ecosystem faces compounding pressures from coastal development, desalination plant discharge, climate-driven temperature extremes, and chronic oil pollution from routine shipping. A 2024 review published in Marine Pollution Bulletin found that 63.5% of the Gulf’s key habitats and species remain “data-deficient,” while 21.2% show documented decline. The margin for absorbing another major environmental shock has narrowed considerably.

What Comes Next

The environmental consequences of this crisis will not be determined by the conflict’s duration alone, but by what happens when it ends. After 1991, clean-up efforts focused almost exclusively on oil recovery from the water’s surface, while coastal habitats were largely neglected. If history offers any instruction, it is that the environmental response must begin alongside the military and diplomatic response, not after it.

International bodies, including the Regional Organization for the Protection of the Marine Environment (ROPME) and the International Maritime Organization, will need to coordinate rapid environmental assessment once conditions allow. Monitoring of coral communities, seagrass beds, and dugong populations should be prioritized, alongside sediment sampling near tanker anchorage sites and sunken vessel locations.

The Persian Gulf’s marine life has survived environmental extremes that would have destroyed ecosystems elsewhere. It has endured the largest deliberate oil spill in history and emerged, battered but functional. Whether it can absorb another round of military trauma on top of everything the 21st century has already thrown at it is a question that marine scientists are watching with deep concern, and one that the rest of us should be paying attention to as well.

Written by: Junior Thanong Aiamkhophueng

Attribution: This article draws on marine biodiversity research published in Marine Pollution Bulletin (2024) on habitat status across the Persian Gulf; peer-reviewed ecological analysis from PMC on critical research needs for Gulf coral reef ecosystems (Feary et al., 2014); EBSCO Research’s overview of the Persian Gulf ecosystem including dugong populations and endemic coral species; the IUCN’s 2023 issues brief on marine pollution from sunken vessels; ScienceDirect review of habitat and organism status across six Gulf countries; gCaptain and Windward Maritime Intelligence reporting on vessel attacks and anchorage patterns; France 24 and Al Jazeera coverage of mine-laying risks and GPS jamming; historical oil spill research by Jacqueline Michel (2010) on sediment penetration and Joydas et al. (2017) on long-term hydrocarbon persistence; CNN’s 2010 retrospective on 1991 Gulf War oil spill recovery; Wikipedia’s compiled entry on the Gulf War oil spill; and Maritime Education’s profile of Persian Gulf marine habitats and biodiversity. Persian Gulf coral reef satellite image by NASA Earth Observatory. For further reading, visit the IUCN Marine Programme, the Regional Organization for the Protection of the Marine Environment (ROPME), and NASA Earth Observatory.

Editor’s Note: Why We Are Featuring Iran Now

Iran is once again dominating headlines.

From widespread public demonstrations that surged across Iran in late 2025 into early this year, to the current escalation and the breaking of war, the country is being discussed globally in the context of politics, conflict, and human suffering. The loss of life and instability unfolding are real and devastating. Nothing in this feature is intended to diminish that reality.

But there is something else that often goes unspoken.

For years, inside and outside of environmental circles, people have quietly asked me a question. Sometimes with curiosity. Sometimes with hesitation. Sometimes almost with guilt.

“What is actually there?”

They were referring to biodiversity.

In today’s world, there is pressure to already know. When the breadth of human knowledge appears to sit at our fingertips, asking basic questions can feel uncomfortable. If a place overlaps with your professional field or your moral concern, you are expected to understand it fully.

Curiosity, however, should never carry shame.

At SEVENSEAS Media, we see questions as bridges. When a region becomes defined only by conflict, it becomes even more important to remember that it is also defined by landscapes, species, ecosystems, culture, and people who have lived in relationship with nature for millennia.

Iran is not only a geopolitical flashpoint. It is a country of vast mountain ranges, ancient forests, wetlands, deserts, coral communities, migratory flyways, and one of the most strategically significant marine corridors in the world. It sits at the intersection of terrestrial and marine biodiversity, connecting ecosystems across Central Asia, the Caucasus, the Arabian Peninsula, and the Indian Ocean.

It is home to coastal communities whose fishing traditions stretch back centuries, to wetlands that host migratory birds crossing continents, and to marine systems that sustain life far beyond their shorelines.

This feature has been in development for some time. In light of current events, we believe it is important to move forward thoughtfully and with care.

Education is not a distraction from suffering. It is part of long term resilience.

At SEVENSEAS Media, we promote education and peace across cultures and living in harmony with nature. We believe that understanding biodiversity can humanize places that are otherwise reduced to headlines. Conservation, at its best, transcends politics and builds shared responsibility for the natural world.

In the articles that follow, we explore the geography of Iran, its terrestrial biodiversity, its migratory importance, and its ocean and coastal ecosystems. We touch on traditional fishing cultures, current pressures, conservation challenges, and the organizations working to protect what remains.

As always, we are not here to simplify complexity. We are here to make space for informed curiosity and careful understanding.

In moments of conflict, it can feel easier to look away. We choose instead to look closer, and to recognize that ecological systems persist regardless of political borders.

This story is developing rapidly. Details may shift as the situation evolves. Last verified: March 3, 2026.

The images of burning tankers and military strikes feel distant when you are reading them on your phone over morning coffee. But the Strait of Hormuz crisis is not a story that will stay overseas. It is already in motion toward your fuel pump, your grocery store, and your electricity bill. The question is not whether you will feel its effects, but when, and how significantly.

This is not a call to panic. It is a call to understand. Here is what is happening, what it means for daily life, and what you can do about it.

Understanding the Ripple

The Strait of Hormuz handles approximately 20 million barrels of oil per day, representing roughly one-fifth of global supply. It also carries nearly 20% of the world’s liquefied natural gas trade, with the vast majority originating from Qatar. When this corridor shuts down, even partially, the consequences cascade through interconnected systems in ways that are not always immediately obvious.

Fuel prices are the most visible and fastest-moving consequence. Brent crude has already jumped approximately 10%, and analysts warn that sustained disruption could push prices above $100 per barrel, levels not seen since the aftermath of Russia’s invasion of Ukraine in 2022. For consumers, this translates to higher prices at the pump, typically with a short delay as wholesale costs filter through to retail. Countries that adjust fuel prices monthly may see a lag of weeks; those with market-based pricing will feel it sooner.

Shipping costs follow closely behind. CMA CGM has already imposed an Emergency Conflict Surcharge ranging from $2,000 to $4,000 per container, effective March 2. Rerouting vessels around the Cape of Good Hope adds 15 to 20 days to transit times between Asia and Europe, driving up fuel consumption, insurance premiums, and operational costs for every carrier on those routes. Freight rate increases of 25% to 30% are being projected for companies dealing in international trade. With both the Strait of Hormuz and the Red Sea now under simultaneous pressure, there is no quick alternative.

Food prices will be the slowest to move but potentially the most deeply felt. Higher energy costs raise the price of fertilizer production, which relies on natural gas as both an energy source and a chemical feedstock. That cost increase works its way into agricultural inputs, then into food processing, packaging (which depends on petroleum-based plastics), refrigerated transport, and finally retail pricing. Import-dependent economies will feel this most acutely. For nations in the Gulf region that rely heavily on imported food, the disruption is doubly compounded: both the energy to produce food and the shipping routes to deliver it are under pressure simultaneously.

What This Actually Means for You

We could list the usual advice here: drive less, buy local, keep some extra staples on hand. Some of that is reasonable enough if you are already headed to the shops. But we think it is more useful to be direct about what this kind of crisis actually looks like from a household perspective, because the biggest risk is not running out of anything. It is making bad decisions based on bad information.

Most of the cost increases heading your way are not something you can opt out of. When Brent crude moves, fuel prices follow. When container surcharges jump $2,000 to $4,000 per unit, those costs get passed along through supply chains that touch everything from packaging plastics to refrigerated transport. The question is not whether prices will rise but how quickly, how steeply, and for how long, and those answers depend on how the military and diplomatic situation evolves in the coming weeks, not on anything happening in your kitchen.

What you can do is calibrate your expectations. Fuel costs will move first, likely within days. Food prices will lag by weeks or months, and any dramatic grocery increases in the first week of this crisis almost certainly reflect opportunistic repricing rather than genuine cost transmission. Knowing that difference protects you from panic and from accepting inflated prices as inevitable when they may not be.

You can also be disciplined about your information sources. The Joint Maritime Information Center, Lloyd’s List, and established international wire services are reporting verified data. Social media is generating speculation at industrial scale. The gap between the two will widen as this crisis continues, and the most regrettable financial decisions, whether personal or political, tend to get made in the fog of the first 72 hours.

Finally, and this matters to us as an ocean publication, pay attention to who is most exposed. It is not the consumer adjusting a commute. It is the fishing communities along the Persian Gulf whose fuel, bait, and export markets are all disrupted at once. It is the populations in Gulf states that import the vast majority of their food through the very shipping lanes now under threat. It is the seafarers on 150-plus tankers anchored in a conflict zone with no departure date. Their story is the full story of what a maritime crisis costs, and it is the story we will keep covering.

The Ocean Connection

At SEVENSEAS, we believe that every geopolitical crisis carries an environmental dimension that too often gets buried beneath the economic and security headlines. The Persian Gulf is not just an energy corridor. It is a living marine ecosystem that supports endangered species, sustains fishing communities, and holds scientific secrets about how coral reefs might survive a warming planet. The decisions being made in the Strait of Hormuz this week will shape the health of that ecosystem for decades to come.

We will continue following this story not only because of its implications for oil markets and global shipping, but because the ocean always pays a price in wartime, and someone needs to be watching.

Written by: Junior Thanong Aiamkhophueng

Attribution: This article draws on economic analysis from Kpler’s market intelligence report on Strait of Hormuz supply disruption and commodity pricing; Gulf News reporting on projected impacts to UAE fuel, grocery, and consumer prices, including commentary from economists on inflationary transmission; Al Jazeera’s analysis of EIA data on daily oil transit volumes and Asian market dependency; SpecialEurasia’s assessment of maritime blockade economics and LNG supply disruption; ESM Magazine’s analysis of European grocery retail and FMCG supply chain vulnerability; The Conversation’s academic perspective on chokepoint economics; Automotive Manufacturing Solutions’ reporting on global logistics rerouting and container surcharge impacts; the Cyprus Mail’s coverage of consumer preparedness and profiteering warnings; gCaptain’s operational data on CMA CGM Emergency Conflict Surcharges and shipping line suspensions; and the Middle East Briefing’s historical comparison of energy crisis pricing patterns. Container ship photo via Wikimedia Commons. For further reading, visit Kpler, the U.S. Energy Information Administration (EIA), and the International Energy Agency (IEA).