PICES Symposium brought together science from all around the world

PICES Symposium brought together science from all around the world

We are well into the United Nations’ Decade of Ocean Science for Sustainable Development, and a symposium held by the North Pacific Marine Science Organization (PICES) brought scientists from all around the world to Seattle, Washington in late October took a look at how far we have come and how far we still have to go.

Several members from the Institute for the Oceans and Fisheries presented at the symposium with the IOF’s own Anna McLaskey, who won the best oral presentation in the Biological Oceanography Committee section.

Dr. Anna McLaskey presents at PICES

“At PICES, I presented data on the prey consumed by dominant zooplankton in the Strait of Georgia over a seasonal cycle,” said McLaskey, a research associate at the Pelagic Ecosystems Lab at the IOF. “As the prey field changes over the year, so too do the prey consumed by zooplankton, which influences their populations as well as higher trophic levels.”

Zooplankton are critical to their ecosystems for many reasons, one being that they are vital prey to many marine animals, including being the sole food source for the gigantic baleen whale. These tiny organisms also eat much of the carbon dioxide fixed by phytoplankton, causing the carbon dioxide to sink to the seabed, taking it out of our atmosphere. McLaskey’s work complements an ongoing time series project maintained at the same location in British Columbia by the Hakai Institute, and was done in collaboration with Fisheries and Oceans Canada. It involved the work of many members of the Pelagic Ecosystems Lab.

Sustainable seas and healthy ecosystems truly does take a village, and the PICES Symposium focused on connecting scientists and communities together to foster ideas for a healthy future. The organization itself was established in 1992 with present member states being Canada, Japan, People’s Republic of China, Republic of Korea, the Russian Federation, and the United States of America.

Jacob Lerner discusses his poster with an attendee

The symposium brought together 672 people from 22 countries, in-person and online, with 244 Early Career Ocean Professionals among the people in Seattle. Twenty international and regional organizations were represented, with eleven workshops, 293 oral presentations and 126 poster presentations.

“Attending PICES was a great experience and the first time I presented my postdoctoral work in person,” said McLaskey. “In addition to my talk and being able to discuss the role of diverse prey sources with other zooplankton ecologists, a highlight of the conference for me was the workshop our group led on developing a conceptual framework to investigate and address urban impacts in coastal seas.”

The symposium focused on climate change, fisheries and ecosystem-based management, along with the social, ecological and environmental dynamics of marine systems, coastal communities and traditional ecological knowledge. The priority was to engage with one another and learn from different pools of knowledge, all united by the common goal of saving our oceans.

IOF attendees also included Dr. Brian Hunt, Jacob Lerner, Dilan Sunthareswaran, Sadie Lye, and Dr. Loïc Jacquemot from the Pelagic Ecosystems Lab; Dr. Juan Jose Alava, Dr. Zeinab Zoveidadianpour, and Kiah Lee from the Ocean Pollution Research Unit, as well as Dana Price who is cross appointed in OPRU and the Marine Mammal Research Unit, and IOF Adjunct professor, Dr. Stephen Raverty; Aleah Wong from the Changing Ocean Research Unit; and, Dr. Szymon Surma from the Marine Zooplankton and Micronekton Laboratory.

IOF students Sadie Lye and Dilan Sunthareswaran

“The PICES symposium was my first conference experience on the North Pacific Coast and it proved to be a great opportunity for me to explore local ongoing research and engage with stakeholders actively involved in studying North Pacific marine ecosystems,” said Jacquemot, a postdoctoral research fellow at the Pelagic Ecosystems Lab. “This event significantly broadened my understanding of the ecology and environmental factors affecting the distribution of various forage fish species, which aligns with the focus of my current postdoctoral project.”

Jacquemot’s current project focuses on using eDNA to map fish distribution in British Columbia’s fjords, and the symposium presented several opportunities to integrate new knowledge into his coming research. The symposium also allowed researchers to expand their topics of interest, with different projects taking center field, including one on European green crab invasion and ecosystem-based management exploration with Indigenous communities, NGOs, and government agencies.

PICES 2024 will be held on October 26th, 2024 in Honolulu, USA. The topic will be “The FUTURE of PICES: Science for Sustainability in 2030.”

Photos provided by Dr. Brian Hunt.

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All-woman crew of marine scientists rowing 5,000 km non-stop for ocean conservation

Four marine scientists are rowing 5,000 kilometres across the Atlantic to raise half a million dollars for ocean conservation.

The all-woman ‘Salty Science’ crew is taking part in the World’s Toughest Row – Atlantic 2023, where teams row without stopping and without support from San Sebastian de La Gomera in The Canary Islands to Nelson’s Dockyard in Antigua. They’ll set out on Dec. 12, weather dependent, and the voyage can take anywhere from 40 to 55 days depending on factors such as weather, the crew’s physical state and more.

They’ll take it in two-person shifts, sleeping two hours before taking the oars again for two hours, and spending 24 hours a day on the 28-foot rowboat. That means eating, sleeping and rowing in all weather—and they’ve got a bucket onboard for bathroom breaks.

Talisker Whisky Atlantic Challenge,rowing,Atlantic Ocean,ocean conservation,World’s Toughest Row

Lauren Shea

“We’re feeling ready. While there are a lot of nerves and buildup, we had a good time this summer training every day in Florida for two months. We have been prepping for nearly three years at this point,” said Salty Science member Lauren Shea, a master’s student in the UBC Institute for the Oceans and Fisheries.

Her crewmates are another B.C. resident, Dr. Isabelle Côté, professor of marine biology at Simon Fraser University, as well as Dr. Côté’s former PhD student Dr. Chantale Bégin, now a professor at the University of South Florida, and Noelle Helder, Shea’s friend from undergraduate studies in Florida now working for the University of Alaska Fairbanks.

“We are four women, four marine biologists, three academic generations, and we are very aware that we are acting as role models,” said Dr. Côté. “We want girls who are interested in marine biology to know that anything is possible.”

The team aims to raise USD$500,000 for marine science and conservation through three organizations: GreenWave, focused on sustainable seafood production; Shellback Expeditions, which supports marine research, conservation and education in the eastern Caribbean; and the Bamfield Marine Science Centre, which will use the team’s funds to create a scholarship for students of underrepresented minorities to help train the next generation of marine conservationists.

Infographic outlining the numbers involved with their journey to row 5,000 kilometres from La Gomera in Spain to Nelson's Dockyard in Antigua.There'll be 1.5 million oar strokes as a team over the course of 40-60 days. The team will burn over 5,000 calories per person per day. The team aims to raise USD$500,000 for marine science and conservation through three organizations. They'll be on the 28-foot rowboat rowing 24 hours.

Photo credit: Alex Walls/UBC Media Relations

The crew will take more than 1.5 million oar strokes, requiring they eat at least 4,000 calories a day. Their personal belongings are limited to one 40-litre dry bag not due to weight limitations, but space, as the boat is packed stem to stern with food. They’ll even be rowing on Christmas Day, when they’ll share small gifts, and when, the team has agreed, Christmas tunes will be allowed onboard.

It will be an arduous trip, aside from the sheer physical requirements. While the team are experienced on the water, with Shea having served as chief mate aboard a sailing school ship in Antigua, they will be self-reliant when at sea, carrying three satellite phones, emergency beacons, a medical kit and handheld radios. And then there’s the weather.

“The boat is self-righting, so if it capsizes it will roll back over. Every team prepares to capsize at some point and you can deploy various tools to slow yourself down and decrease this risk, but really it comes down to preparing for different emergency scenarios and working together when issues occur,” said Shea.

“It feels a lot more real now. It’s very exciting, and every time I spend time with my team I’m that much more excited, because they’re a pretty remarkable group of people.”

Follow Salty Science during the race via this tracking app and clicking “Add Race” and typing “World’s Toughest Row – Atlantic 2023”, or via their Instagram account. Find out more on their website.

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Your local sea snail might not make it in warmer oceans – but oysters will

Nucella lamellosa or frilled dogwinkles. Photo credit: Dr. Christopher Harley

The frilled dog winkle may sound like a complex knot for a tie, but this local sea snail holds clues to our warmer future, including a dire outlook for species that can’t move, adapt, or acclimate as fast as their environment heats up.

Strait of Georgia hotspot

To figure out how location affects vulnerability to a changing climate, UBC zoology researchers Drs. Fiona Beaty and Chris Harley collected marine snails from the Strait of Georgia, a potential hot spot of climate risk, and the Central Coast, where waters are cooler and warming more slowly.

They monitored snails in the lab, in water heated to current and future projected sea temperatures, and in the field along shorelines.

Infographic that shows the warming rate and thermal sensitivity shape climate change vulnerability. It has a aerial view of BC, from the central coast to the Strait of Georgia. It explains how field experiments were done to show that the snails from the Strait was 50% more vulnerable to ocean warming that the populations on the Central Coast of BC because seawater temperatures exceed stressful levels in the summer and local warming rates may be faster than rates of adaptation. Seawater temperatures in the Strait of Georgia are increasing at double the global rate of ocean warming.

Credit: Rush Dhillon

Movement and snails don’t go together

They found Strait of Georgia snails were 50 per cent more vulnerable to ocean warming, experiencing current seawater temperatures much closer to the upper limits of what they can tolerate than snails on the Central Coast. Indeed, up to a third more snails perished when kept on the Strait shoreline over summer than those kept on the Central Coast.

“These creatures are already experiencing temperatures beyond their comfort zone in the Strait, and they’re unlikely to keep up with warming oceans because they can’t move very far,” says Dr. Beaty, who completed the research during her PhD at UBC.

She says the work highlights that climate risk can be tied to location, even for people. If a species can’t move from an environment that is changing faster than the species can adapt, it could be in trouble.

Oysters, anchovies and whales, oh my!

The Strait could represent a dead zone in the species’ future. Meanwhile, species that will survive in a warmer future are likely those more tolerant of heat with shorter life spans, such as oysters and northern anchovy, as well as those that feed on them, such as whales.

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UN climate conference should not be ‘business as usual’, say climate experts

Photo by United Nations Framework Convention on Climate Change on Flickr

Climate experts are looking for action on finance and renewable energy goals at the United Nations climate change conference, including the 28th Conference of Parties (COP).

We spoke to four experts including current and former COP delegates to ask what the world, and Canada, needs to see come out of the conference, which will be held from Nov. 30 to Dec. 12 in Dubai.

Dr. William Cheung: The oceans must be part of the discussions

Dr. Cheung is a professor and the director of the Institute for the Oceans and Fisheries, a UBC COP 28 delegate and co-author of the IPCC 2023 report.

The oceans must be considered part of the discussions—they host a vast diversity of life, provide renewable energy through offshore windfarms, feed or employ a good portion of the world, serve as carbon sinks and offer a potential low-carbon pantry and economy through sustainable fishing and aquaculture.

Even if the world successfully limits global warming to 1.5 C, tropical areas, small islands, and developing states will continue to see a substantial decrease in catches and seafood availability, as well as sea level rise in the near term. We need to see the loss and damages fund used to support these actors.

Not achieving the warming limit doesn’t mean we should give up. Every degree of warming avoided helps. This requires further emissions cuts than those to which countries have already committed. Making meaningful progress in this conference is very important for addressing other global challenges including biodiversity conservation and food security.

Dr. Kathryn Harrison: Countries need to up their game

Dr. Harrison is a professor in the department of political science and a UBC COP 26 delegate.

The world isn’t on track to meet the Paris Agreement goal to limit warming to 1.5 to 2 C, and so, the most fundamental thing we need is greater ambition to reduce emissions, both in terms of national targets and domestic policies to meet them.

Wealthy countries that disproportionately caused climate change must provide greater financial support to low-income countries that disproportionately suffer its impacts. I’m also hoping to see acknowledgement of the need to phase out both consumption and production of fossil fuels.

Canada must demonstrate our word can be trusted by implementing policies needed to meet our targets, and acknowledging the need to wind down fossil fuel production. And Canada can lead in committing greater climate finance for developing countries

It’s easy to be cynical about UN climate conferences, but I’m stubbornly hopeful, because I have never been surrounded by so many people deeply committed to eliminating climate change.

Fabiola Melchior: Strengthening youth participation

Fabiola Melchior is a master’s student in Interdisciplinary Graduate Studies at UBC Okanagan, a COP 28 delegate and a climate activist.

I hope to see the parties strengthen meaningful youth participation at key decision-making events, which is crucial not only because youth are at the forefront of climate justice organizing in their communities, but especially because we continually confront the roots of capitalist and colonial structures that have led to the climate crisis. This could include the institutionalization of the Youth Climate Champion within the COP Presidency.

Going into this conference, we need to amplify calls for the implementation of a robust conflict-of-interests policy within the UN Framework Convention on Climate Change. This would require the parties to maintain separation from corporate entities and limit sponsorships by polluting entities that may impact the focus, progress and outcomes of COPs. Last year 636 representatives of oil and gas industries attended COP, outnumbering any one delegation of frontline communities. It is time to take action, and kick big polluters out.

Temitope Onifade: Tackle renewable energy technologies

Temitope Onifade is an affiliated research scholar in the Peter A. Allard School of Law and a UBC COP 26 delegate.

I’d like to see countries address the management of renewable energy technologies, the most widely accepted alternative to fossil fuels. These technologies require diverse minerals, metals and other materials. Efforts to find these, such as deep-sea mining, create social and environmental challenges. COP 28 should create a framework to address such implications, which can then be implemented with partners such as the International Renewable Energy Agency.

COP 28 should not be business as usual: governments, heavily lobbied by businesses, negotiating technology and market-based systems. We have done this for decades, but it has not worked. Rather, governments should be promoting the solutions that work while empowering the countries and communities that are disproportionately impacted by not only climate change but also the solutions. They should listen to what such countries and communities think about the best ways to deal with those impacts, not what powerful industries tell them.

For more delegates, and other UBC experts, available to comment on the conference, the 2023 UNEP Emissions Gap report, and other climate-related topics, click here.

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The cryptic lives of marine mammals: a century of marine mammal metabolisms

Metabolic rates determine the resources needed to maintain healthy animals and the potential impacts that these animals have on the world around them.

Bryde’s Whale by Paphop/Pixabay

The ocean is a home, playground, and hunting zone for a wide variety of creatures, including marine mammals. From dolphins and walruses to manatees and sea otters, the classification “marine mammals” umbrellas four different groups: cetaceans, pinnipeds, sirenians, and marine fissipeds. These diverse animals all have unique features that help them adapt to the watery world around them.

One of those features is their metabolic rate — the rate of energy expenditure over a specific period of time. A recent study published in Conservation Physiology, using only “gold standard” data, provided an overview of over a century’s worth of knowledge about marine mammal metabolism and the factors and behaviours that influence metabolic rates.

“We’re interested in this because we need to understand how much these animals need to survive when they are in a changing environment,” said Dr. Shawn Noren, lead author and research scientist and educator at the UC Santa Cruz. “We need to know how those calorie requirements might change with increased human disturbance or changes in the climate that makes them have to look harder for their food.”

Funded by the Office of Naval Research, Noren was tasked with reviewing the metabolism of marine mammals due to concerns with disturbances on beaked whales during routine sonar tests by the American navy. The beaked whales were observed leaving the area during these tests, often during important feeding times. These offshore, deep diving giants are elusive and mysterious, and scientists have been unable to measure their metabolic rates or gather much data on them in general. This is true for many marine mammals, especially larger species that are not easily captured or trained.

This review is particularly vital for understanding how marine mammals respond to different changes in their environment, either natural or man-made.

“There’s certainly a lot of human disturbances for a wide variety of animals,” said Noren. “For example, dolphins in the eastern tropical Pacific travel with tuna fish, but these fish are also chased by tuna fisheries. Because this disturbs the dolphins’ normal behaviours, this results in a huge energy expenditure for the mammals.”

Monica Max West/Pixabay

“In other parts, walruses are being impacted because melting ice means that they can’t use the ice as a base for their foraging,” said Noren. “They have to sit on land, and that requires them to swim further to their favorite food resource — clams. So, we are trying to figure out how much harder these animals are working, and to do that, we needed reliable data to figure out these extra costs (calories).”

Collecting metabolic data is a complicated task. There are many different ways to document marine mammal metabolism, each with varying degrees of reliability. One gold standard method measures places animals in a tent-like apparatus where their oxygen and carbon dioxide levels can be monitored. Other methods require the repeated capture and handling of individuals. This is nearly impossible to do in the wild. Marine mammals who live their entire lives at sea or remain submerged for long periods of time are almost impossible to measure, creating large gaps in the data.

“Shawn Noren was initially asked to condense what we already knew about cetaceans — whales, dolphins, and porpoises,” said David Rosen, study author and assistant professor in the Marine Mammal Research Unit at UBC’s Institute for the Oceans and Fisheries. “What she found out was that we don’t really know a whole lot because they’re extremely difficult to measure under controlled circumstances. There are whole groups of whales that we don’t have measurements for simply because, right now, it’s technologically impossible to do that.”


Pixabay

There are also different types of metabolic rates that can be measured: basal metabolic rate (BMR) which is the normal base rate of an adult animal; resting metabolic rate (RMR) which measures the rate of an animal at rest; and field metabolic rate (FMR) which measures free-living individuals. While all three rates are extremely important and all use well-defined measurement factors, FMR is considered more ecologically relevant because it includes baseline energy consumption (growing and resting) while also containing the energy expenditure as the animal moves and survives.

For applying and interpreting field metabolic rates, underlying factors become even more restricted and complex. Even within one reproductive season for one species, FMR can vary greatly depending on the behaviour performed. For example, breeding adult Antarctic fur seals rates are very different depending on if you are measuring fasting territorial males or measuring lactating females.

“When you’re talking about the metabolic rate, or daily energy expenditure, it’s hugely dependent on the life stage of the animal,” said Rosen. “For example, when you capture a female sea lion nursing a pup onshore, it’s metabolic rate will be very different if you catch it when it has been ashore for a while versus if it has just returned from a long foraging trip.”

Out in the wild, calories are what every animal is trying to collect if they are not reproducing or resting. During the colder months when food may not be as readily available, calories are even more precious as survival is dependent on how much blubber an animal can put on. What animals eat, and how they expend this energy, is essential for understanding how animals may adapt to future conditions. Metabolic rates allow scientists to measure and track the rates of calorie consumption and expenditure, allowing us to understand how climate change and other factors are currently impacting the survival of wild marine mammals.

TheOtherKev/Pixabay

But one clear result of the study is that there is no single estimate of energy expenditure for “a marine mammal”. There are significant differences among major groups (such as whales versus sea lions) and even differences between species within each group. As climate change and human impact increase, estimates of energy expenditure are crucial to marine mammal conservation efforts. Metabolic rates determine the resources needed to maintain healthy animals and the potential impacts that these animals have on the world around them.

What are the Metabolic Rates of Marine Mammals and What Factors Impact this Value: A review was published in Conservation Physiology

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Do a deep dive into… The Falkland Gentoo Penguins!

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Diving, snacking, laying eggs! What do different hemoglobin levels mean for gentoo penguins?

For gentoo penguins, hemoglobin levels in the blood are vital for efficient diving and foraging—which in turn could impact breeding success

© Sarah McComb-Turbitt

On the remote and rugged Falkland Islands in the South Atlantic, birdlife prospers. From black-browed albatross to white-chined petrel and rockhopper penguins, the beach-lined coasts teem with seabirds found in very few other places. Native to the islands, hundreds of thousands of gentoo penguins live and hunt in the Falklands, using to the islands as a breeding zone for their tiny penguin chicks.

The birth dates, and chances for survival, of these chicks are dependent on when their parents lay eggs — a factor reliant on the adults being able to forage and feed enough to have the energy to breed. A recent study published in the Marine Ecology Progress Series investigated if diving efficiency — which impacts the type and amount of food foraged — is associated with markers of oxygen storage and carrying capacities (aerobic capacities). The study then looked at if these markers are associated with pre-breeding foraging efforts and the penguins’ breeding statuses.

“We were interested in understanding how diving capacity — specifically how long gentoo penguins can stay at the bottom — is related to their aerobic condition,” said Marie Auger-Méthé, principal investigator and associate professor at the Institute for the Oceans and Fisheries. “Diving deep takes time and energy, and it’s useful only if the penguin can search and catch food at the bottom. We showed that penguins with higher aerobic capacities can spend more of their dive at depth than other penguins while still taking the same amount of time to recover.”

Diving is the key to these birds’ survival. While only 30 inches tall and 15 pounds, gentoo penguins can swim up to 22 miles an hour, the fastest of any diving bird. They exhibit a range of diving behaviours, preferring to shallow dive to preserve energy while their deep dives can reach depths of over 200 metres. They eat different types of squid, fish and krill, with larger, more energy-rich prey being found closer to the ocean floor.

While foraging is important for the survival and wellbeing of many animals, gentoo penguins have to increase their time on land to bond with their mate and maintain nesting sites before laying eggs. This means that successful food foraging during the pre-breeding season is absolutely essential for these birds as they prepare to expend energy to defend their nests and lay eggs. A penguin with plenty to eat will lay eggs sooner compared to unlucky counterparts, creating a higher survival rate for their own offspring. Gentoo penguins can lay up to two eggs per year, but some will skip a year and forage, choosing to replenish their health so they are able to better raise chicks in the future.

© Sarah McComb-Turbitt

“Animals attempt to time the birth of new offspring with an abundance of food in their environment for optimal nourishment while the chicks grow,” said Sarah McComb-Turbitt, lead author and marine biologist at the Institute for the Oceans and Fisheries. “Penguins can also lay later in the season, delaying nesting until they have recovered from the harsh winter seas. The trade-off, however, is that late chicks will be smaller when winter comes again and have a lower chance of survival. Chicks from eggs laid early have a longer period of growth before winter, increasing their chances of fledging and growing into adulthood.”

So, what exactly impacts the gentoo penguin’s ability to dive and find food before breeding?

During a dive, the penguin’s effort can be measured by the trip duration, total time spent at sea and the vertical (dive) distance traveled. With larger prey found at the bottom, penguins that can dive deeper and longer have a better chance of feeding sufficiently. Hemoglobin (Hb), the protein in red blood cells that carries oxygen to all parts of the body, is a key factor for diving penguins. Penguins with higher hemoglobin levels dive more frequently at deeper depths (more than 140 metres) and can spend more time at these extraordinary depths. These penguins also don’t need to spend more time replenishing their oxygen stores, which means they can forage for food much more efficiently. They are able to find more food — and also better and rarer food — compared to other penguins, which reduces competition and saves energy.

Hematocrit (Hct) is the percentage of red blood cells in blood. It can also be a factor for diving capacities, as sometimes, a higher percentage of hematocrit may mean a higher amount of hemoglobin, which means more oxygen carrying capacities. However, a higher hematocrit doesn’t necessarily mean a better dive — having more red blood cells thickens blood, creating lower circulation and making the heart work harder to circulate the blood.

© Sarah McComb-Turbitt

“These kinds of studies are really important because while most research still tries to describe what a typical individual of a species does, we know that individuals vary drastically in their conditions, behaviour and reproduction,” said Auger-Méthé. “In some cases, there may not be a typical individual that represents the majority in a population. These differences can have a large effect on their resilience to human stressors, as some individuals may be hit harder than others.”

With gentoo penguins, human stressors can mean anything from climate change, fishing and tourism to pollution, invasive species and human development.

“Pollution from shipping, oil spills and other maritime activities introduce contaminants that penguins ingest and carry,” said McComb-Turbitt. “Commercial fishing, particularly for squid and fish, is also a significant industry in the Falkland Islands. Overfishing could impact the food availability, and consequently, a penguin’s survival and ability to reproduce.” Additionally, different types of fisheries can have varying effects on the penguins. Inshore overfishing may disproportionally impact penguins with low aerobic capacity, as they would not be able to reach fish in offshore waters.

These penguins, however, are resilient little creatures who use their flexible diets and diving capacities to quickly adapt to changes in their environments. The Falkland gentoo penguins are genetically different to their relatives in Antarctica, making future studies vital to understanding more about these fascinating animals.

Diving efficiency at depth and pre-breeding foraging effort increase with haemoglobin levels in gentoo penguins published in the Marine Ecology Progress Series

© Sarah McComb-Turbitt

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“Who stands to benefit?” To engage in deep-sea mining or not. Not, say international scientists

Private companies may secure short-term profit, but deep sea mining comes at a major cost for humanity.

Deep sea mining boat, image compiled by Lubna

Deep sea mining will produce far too few benefits for the harm it will cause. That is the result of an analysis by marine scientists and policy experts from around the globe, led by Dr. Rashid Sumaila from the University of British Columbia.

While advocates of deep-sea mining say that the investment is needed to provide the metals needed for electric car batteries and other electronic infrastructure for a carbon neutral economy, opponents point to the irreparable damage that it would have on the environment, including delicate habitats on the seafloor, and the detrimental effect it will have on developing nations, including those that may directly benefit from deep sea mining in their area.

The researchers looked at the cost and benefits for private mining companies and their investors, developing countries, including those who could directly benefit from deep sea mining in their area, countries engaged in terrestrial mining, and ‘nature’ itself, and found that while there would be some short-term private company profits, over the longer term the benefits would dwindle. Most particularly for developing nations, the natural world and humanity as a whole.

“On a purely economic level, capital and operational costs would be very high. Approximately US$ 4-6 billion. Projected revenues are estimated to US$ 9-11 billion, however that is over a thirty-year period,” said Dr. Rashid Sumaila, lead author and professor in UBC’s Institute for the Oceans and Fisheries (IOF) and the School of Public Policy and Global Affairs. “Add to that the operational costs of refining the polymetallic nodules mined, at best the annual profit would be in the region of US$1.2 billion. Investors may like those numbers; however, they are also likely to have those profits chipped away at by both litigation and business model risks, as surges in climate change and biodiversity impacts take their toll, along with foreseeable litigation from aggrieved countries, communities and other stakeholders impacted by deep sea mining.”

Developing countries, including those who are attracted to deep sea mining for its potential to generate economic benefits such as tax revenues and jobs, will gain little, according to the commentary. “Sponsoring member states will likely benefit from a corporate tax payment of 25 per cent – approximately US$3 billion. However, it will be divided amongst the states over the same 30-year contract period,” said Dr. Lubna Alam, co-author and research scholar at the Institute for the Oceans and Fisheries. “It will deliver pittance to those countries.”

The ecological damage would be even worse. “We know so little about our oceans, and even less about the seafloor itself. The irreversible damage that it is going to do to very delicate ecosystems is horrific,” Sumaila said. For instance, a single mining operation could release up to 80 km³ of sediment plume into the ocean every day, spreading to an area of up to 24,000 km² in the Clarion-Clipperton Zone alone. This plume is capable of reducing light penetration and water oxygenation while at the same time dispersing toxins and radioactivity.

Dr. Sumaila does point to some international movement on this issue. The International Seabed Authority (ISA), an intergovernmental organization established under the United Nations Convention on the Law of the Sea (UNCLOS), to regulate the exploration of minerals found on the international seafloor, began its most recent round of meeting on the subject on October 30th, and already 23 countries, including many small island developing states who would be directly affected by deep-sea mining, as well as large developed countries including Canada and the United Kingdom have asked for a moratorium, or ban on deep sea mining.

“At the time when safeguarding biodiversity and ecosystems is paramount, this analysis of deep-sea mining’s economics is timely,” said Dona Bertarelli, philanthropist and ocean advocate who funded this research. “Highlighting short-term gains for a few, but enduring costs for coastal communities and states most reliant on a thriving, healthy ocean. I hope this study will prompt International Seabed Authority member states to stop and reflect.”

“The minerals on the international seafloor are humanity’s common heritage,” said Dr. Rashid Sumaila, lead author and professor in UBC’s Institute for the Oceans and Fisheries. “However, our analysis shows that while deep sea mining may provide short-term profits for mining companies and marginal benefits to developing countries, long term benefits will be minimal due to anticipated business model and litigation risks, public opposition, and competition from land-based mining. In fact, this action could come with dire, irreparable loss to nature and humanity as a whole.”

Twenty-three countries who have joined the ‘Global Tide of Opposition to Deep Sea Mining’

2022: Chile, Costa Rica, Ecuador, Fiji, France, FSM, Germany, New Zealand, Panama, Paulau, Samoa, Spain

2023: Brazil, Canada, Dominican Republic, Finland, Ireland, Monaco, Portugal, Sweden, Switzerland, United Kingdom, Vanuatu

To engage in deep-sea mining or not to engage: what do full net cost analyses tell us? was published in Nature

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AI-powered data-limited stock assessment method more accurate than ‘gold standard’ in predicting sustainable fisheries catches

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Low-income countries could lose 30% of nutrients like protein and omega-3 from seafood due to climate change

The nutrients available from seafood could drop by 30 per cent for low-income countries by the end of the century due to climate change, suggests new UBC research.

That’s in a high carbon emissions and low mitigation scenario, according to the study published today in Nature Climate Change. This could be reduced to a roughly 10 per cent decline if the world were to meet the Paris Agreement targets of limiting global warming to 1.5 to 2 degrees Celsius – which recent reports have shown we’re not on track to achieve.

“Low-income countries and the global south, where seafood is central to diets and has the potential to help address malnutrition, are the hardest hit by the effects of climate change,” said first author Dr. William Cheung, professor and director of the UBC Institute for the Oceans and Fisheries (IOF). “For many, seafood is an irreplaceable and affordable source of nutrients.”

The researchers examined historical fisheries and seafood farming, or mariculture, databases including data from UBC’s Sea Around Us to find out quantities of key nutrients that were available through fisheries and seafood farming in the past, and used predictive climate models to project these into the future. They focused on four nutrients that are plentiful in seafood and important to human health: calcium, iron, protein and omega-3 fatty acids, the latter of which is not readily available in other food sources.

They found that the availability of these nutrients peaked in the 1990s and stagnated to the 2010s, despite increases provided by farming seafood, and from fishing for invertebrates such as shrimp and oysters.

Calcium sees biggest decline

Looking to the future, the availability of all four nutrients from catches is projected to decrease, with calcium the hardest hit at a projected decline of about 15 to 40 per cent by 2100 under a low and high emissions scenario, respectively. Omega-3 would see an approximately five to 25 per cent decrease. These declines are largely driven by decreases in the amounts of pelagic fish available for catch.

“Small pelagic fish are really rich in calcium so in areas of the world where people have intolerances to milk or where other animal-sourced foods, like meat and dairy, are much more expensive, fish is really key to people’s diets,” said senior author Dr. Christina Hicks, professor at Lancaster University. “In many parts of the world, particularly low-income countries across the tropics, fish supply nutrients that are lacking in people’s diets.”

While seafood farming will contribute more nutrients in the future compared with current levels, the researchers projected these increases would not be able to compensate for the loss from fisheries. Under a high emissions scenario, any gains in the availability of nutrients from seafood farming before 2050 would be lost by 2100.

“The primary reason for this is climate change, which is also a significant threat to seafood farming, leaving us with a growing nutritional deficit,” said co-author Dr. Muhammed Oyinlola, a postdoctoral fellow in the UBC department of zoology and the Institut national de la recherche scientifique. “Seafood farming alone cannot provide a comprehensive solution to this complex issue.”

Photo by Dương Nhân / Pexels

The availability of all four nutrients from tropical waters of generally lower income nations, such as Indonesia, the Solomon Islands and Sierra Leone, is projected to decline steeply by the end of the century under a high emissions scenario, compared with minimal declines in higher income, non-tropical waters, such as those of Canada, the U.S. and the U.K.

Globally, the researchers projected that seafood-sourced nutrient availability would decrease by about four to seven per cent per degree Celsius warming. For lower-income countries across the tropics including Nigeria, Sierra Leone, and the Solomon Islands, the projected decline was two to three times this global average at nearly 10 to 12 per cent per unit of warming.

“This research highlights the impact of every degree of warming,” said Dr. Cheung. “The more we can reduce warming, the fewer risks to marine and human life.”

Using all of a fish

Certain types of fish such as anchovies and herring are packed with nutrients but often used for fish meal and fish oil because these nutrients also promote fish growth. Similarly, many countries retain only select parts of a fish for sale. The researchers highlighted potential adaptations to increase nutrient availability from seafood, by retaining more of these nutritious fish for local human consumption, as well as reducing food waste in fisheries production and consumption by using all parts of a fish including the head and fins.

“The future development of seafood supply needs to consider the nutritional security of vulnerable groups, not just economic benefit,” said Dr. Cheung. “But there’s a limit to how effective these interventions are, so it’s important to limit global warming as much as possible.”

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