Your Health

Ecosystem biodiversity important to human health and nutrition

W. Gifford-Jones MD & Diana Gifford-Jones

May 8, 2023

BY W. GIFFORD- JONES MD & DIANA GIFFORD-JONES

The routine of modern-day life for most of us involves regular trips to the grocery store and three meals a day. The regular patterns of our diet can be a source of comfort or a rushed necessity, but is eating the same familiar foods – often the same recipes, products, brands, over and over, day by day – good for us?

As nutritious as a “well-balanced” diet may be, there are good reasons to strive for a more diverse diet.

Chimamanda Ngozi Adichie, the acclaimed Nigerian writer, was not referring to plant and animal ecosystems when she wrote, “Diversity is not about feeling included, it’s about feeling valued.” Yet, she’d surely agree. Unless biodiversity is valued, it will lose ground, quite literally.

Now, new research is showing that valuing diversity in the natural world has important implications for human health.

A study in the journal PNAS examines the relationship between aquatic biodiversity and human health. Researchers found that aquatic ecosystems, such as: rivers, lakes, and oceans, provide a wide range of nutritional benefits to human populations.

According to the study, consuming a diet that includes a variety of fish, seaweed, and other aquatic foods can help prevent chronic diseases such as heart disease and diabetes. Additionally, these foods are rich in important nutrients such as: omega-3 fatty acids, iodine, and iron, which are essential for human health.

The researchers also found that consuming a diverse range of aquatic foods can have positive impacts on the environment. By promoting the consumption of a wider range of fish and other aquatic foods, fisheries and aquaculture can diversify their operations and reduce pressure on overfished species.

Protecting the biodiversity of aquatic ecosystems is essential for continued access to nutritional benefits. Yet, climate change and human activities have already impacted the health of the world’s water. Conservation and sustainable use simply haven’t been the priority.

Land surfaces, where humans live, haven’t fared any better. Scientists are concerned about the health of the: soil, grasses, and forbs that many animal species depend on for their dietary nutrition.

Dr. Forest Isbell, professor of ecology at the University of Minnesota, notes, “Land use changes and overexploitation are driving changes in biodiversity and ecosystems in many parts of the world.”

Isbell has closely read the research published in PNAS and thinks the findings are likely to be replicated in other ecosystems. He’s involved in studies that test the effects of biodiversity in grasslands that provide essential forage for grazing livestock. “It’s an important question,” he says. “Due to widespread farming and overgrazing by livestock, we have seen significant biodiversity loss in many grasslands. Just as people benefit from a diverse diet, so too do our livestock. By studying how biodiversity of grasses affects nutritional content of forage for herd animals, for example, we will be better able to inform policies and practices designed to protect land-based ecosystems.”

Human health depends on a diverse diet that delivers vitamins, minerals, protein, fats, water, and carbohydrates. It’s essential to place high value on the availability and quality of these components, as demonstrated by growing evidence of a vital relationship between ecosystem biodiversity and human health.

Sadly, a study by the Food and Agriculture Organization of the United Nations reports that 95% of the calories consumed worldwide come from a mere 30 species. Farmers cultivate only about 150 of the 30,000 edible plant species, and 90% of the food from domesticated livestock comes from only 14 animals.

What can health-conscious consumers do? On the next trip to the grocery store, think about the choices and try picking out a diverse range of foods, including from aquatic sources.

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Written By W. Gifford-Jones MD & Diana Gifford-Jones

Dr. W. Gifford-Jones, MD is a graduate of the University of Toronto and the Harvard Medical School. He trained in general surgery at Strong Memorial Hospital, University of Rochester, Montreal General Hospital, McGill University and in Gynecology at Harvard. His storied medical career began as a general practitioner, ship’s surgeon, and hotel doctor. For more than 40 years, he specialized in gynecology, devoting his practice to the formative issues of women’s health. In 1975, he launched his weekly medical column that has been published by national and local Canadian and U.S. newspapers. Today, the readership remains over seven million. His advice contains a solid dose of common sense and he never sits on the fence with controversial issues. He is the author of nine books including, “The Healthy Barmaid”, his autobiography “You’re Going To Do What?”, “What I Learned as a Medical Journalist”, and “90+ How I Got There!” Many years ago, he was successful in a fight to legalize heroin to help ease the pain of terminal cancer patients. His foundation at that time donated $500,000 to establish the Gifford-Jones Professorship in Pain Control and Palliative Care at the University of Toronto Medical School. At 93 years of age he rappelled from the top of Toronto’s City Hall (30 stories) to raise funds for children with a life-threatening disease through the Make-a-Wish Foundation. Diana Gifford-Jones, the daughter of W. Gifford-Jones, MD, Diana has extensive global experience in health and healthcare policy. Diana is Special Advisor with The Aga Khan University, which operates 2 quaternary care hospitals and numerous secondary hospitals, medical centres, pharmacies, and laboratories in South Asia and Africa. She worked for ten years in the Human Development sectors at the World Bank, including health policy and economics, nutrition, and population health. For over a decade at The Conference Board of Canada, she managed four health-related executive networks, including the Roundtable on Socio-Economic Determinants of Health, the Centre for Chronic Disease Prevention and Management, the Canadian Centre for Environmental Health, and the Centre for Health System Design and Management. Her master’s degree in public policy at Harvard University’s Kennedy School of Government included coursework at Harvard Medical School. She is also a graduate of Wellesley College. She has extensive experience with Canadian universities, including at Carleton University, where she was the Executive Director of the Global Academy. She lived and worked in Japan for four years and speaks Japanese fluently. Diana has the designation as a certified Chartered Director from The Directors College, a joint venture of The Conference Board of Canada and McMaster University. She has recently published a book on the natural health philosophy of W. Gifford-Jones, called No Nonsense Health – Naturally!

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