Among the myriad impacts climate change is having on the world, one in particular may come as a surprise: heightened atmospheric CO2 levels might be adversely affecting the nutritional quality of the food you eat. As carbon dioxide in the atmosphere continues to increase, you could end up eating more sugar and less of important minerals such as zinc, magnesium and calcium — without even realizing it. Those effects could also be reverberating up the food chain and altering ecosystems in as yet poorly understood ways.
For plants, a rise in atmospheric carbon dioxide actually boosts productivity by stimulating photosynthesis. They make more carbohydrate and grow larger — seemingly a good thing. But because other nutrients don’t increase and can’t keep pace with the augmented carbohydrate, this potential boon to our food supply isn’t all that it seems: plants end up having a higher carbohydrate to protein ratio, and relatively lower concentrations of minerals.
Put simply: atmospheric carbon dioxide acts as a sort of fertilizer to grow bigger, leafier plants, but those larger broccolis and lettuces actually contain less nutritional value per portion than their predecessors grown in the preindustrial, pre-fossil fuel world.
And that could be a problem for the world’s already malnourished people, for bees seeking protein-rich pollen so they can safely overwinter, and for ecosystems that could be thrown out of balance by changes in plant nutrition.
The human implications of these ongoing changes to our food supply came under the spotlight in April when the US Global Change Research Program (USGCRP) published a major report on the impact of climate change on human health. One of its key findings was that rising carbon dioxide will reduce the nutritional quality of food.
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Rice fields in Kashmir, India. Staple crops such as rice and wheat are forecast to become less nutritious as a result of increasing carbon dioxide levels in the atmosphere. Photo courtesy of sandeepachetan.com travel photography on Flickr under CC BY-NC-ND 2.0 license
Imagine a fish isolated in an Amazonian lake — part of the vast freshwater ecosystem of the Amazon basin, an ever-changing network of rivers, lakes and floodplains that extends to 1 million square kilometers (386,102 square miles).
Now imagine that isolated fish as water levels rise during the wet season, and floodplains vanish beneath up to 15 meters (49 feet) of water. The fish — once restricted by the lake’s edge — swims freely into the flooded forest and mingles with others of its kind from elsewhere.
For thousands of years, isolated fish populations across the Amazon have likewise played a game of musical chairs: intermixing between flooding water bodies, migrating short and vast distances between lakes and along river channels, and then as the waters receded, forming new lake and river populations.
This connectivity — with the genetic mixing it affords — is vital for healthy fish populations, but is extremely vulnerable to changes in the annual “flood pulse” that inundates forests.
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A South American Leaf Fish (Monocirrhus polyacanthus). More than 2,000 fish species live in the Amazon, the highest fish biodiversity in the world. That diversity has been greatly enriched due to the periodic isolation and intermixing of freshwater species that occurs across the region. Photo © Rhett A. Butler/Mongabay
Latin America’s largest electrical company operates 45 hydroelectric dams, and is responsible for 34 percent of Brazil’s generating capacity. The company, Eletrobras, makes laudable claims about its corporate values, including a commitment to sustainability, and to “operating through a well-balanced environmental, social and ethical responsibility.”
But with grave concerns raised about the environmental and social impacts of hydroelectric dams in the Amazon, and with Eletrobras itself a key actor in the hugely controversial Belo Monte dam, how sustainable are dam-building companies really being? Are the business decisions they make driven by a genuine commitment to sustainability? And, perhaps more importantly, how can we pragmatically assess the true motivations behind those decisions?
Ethical analysis may hold the answers, according to a recent study published in Sustainability. An international team of researchers suggest it is possible to pinpoint what lies behind a company’s decision-making process through a rigorous ethical analysis.
Read the full article, published in May 2016 on Mongabay, here.
Researchers are using acoustic monitoring to tune into gunshots and track a most deadly predator – Africa’s wildlife poachers.
Cameroon’s Korup National Park is home to elephants, chimpanzees, red colobus monkeys, drill, and a myriad of noisy species, whose squawks, squeals and howls fill the forest air. For more than two years, twelve acoustic monitors were deployed there and recorded every sound covering a 54 square kilometer (21 square mile) area of protected tropical forest.
They were tuned to listen around the clock for just one sound: gunshots.
“Our ultimate goal is to improve the effectiveness of anti-poaching patrols in African tropical forest protected areas,” Joshua Linder, one of the lead scientists working on the acoustic monitoring project, told Mongabay.
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Climate change health effects are wide ranging and include negative impacts on air quality, mental health, nutrition, and insect and microbe transmitted diseases.
- A Climate and Health Assessment presented at the White House by the US Global Change Research Program revealed wide-ranging climate change health impacts.
- Every American is vulnerable, but low income people, certain ethnicities, Indigenous people, the young, elderly, and pregnant women are disproportionately at risk.
- The report is meant to help policymakers generate and implement a proactive response to the many escalating and evolving health impacts due to climate change.
First published on Mongabay in April this year, you can read the full article here.
Scientists have discovered at least 500 Critically Endangered grey-shanked doucs in Vietnam — their only home — boosting species estimates to up to 1,500 animals
Photo copyright: Nguyen Van Truong/Fauna & Flora International
Grey-shanked doucs live in the forest canopy of the Central Highlands of Vietnam. Their numbers have been severely reduced by habitat loss and fragmentation, along with hunting for food and the pet trade.
Fauna & Flora International (FFI) researchers located the 500+ animals in several subpopulations within the Kon Tum forest, which provides important connectivity to protected areas to the south and north, and across the border into Cambodia.
FFI Vietnam is now developing a conservation strategy which may include ecotourism and forest patrols for the newly discovered population. Vietnam is home to 11 Critically Endangered primate species, and a priority for primate conservation in Southeast Asia and the world.
Read the full article on Mongabay.