Category: Water

What is a wetland? An ecologist explains

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Photo by Tyler Butler on Unsplash
Photo by Tyler Butler on Unsplash

By Jon Sweetman, The Conversation US CC BY-NC-ND 4.0)

Wetlands are areas of land that are covered by water, or have flooded or waterlogged soils. They can have water on them either permanently or for just part of the year.

Whether it’s year-round or seasonal, this period of water saturation produces hydric soils, which contain little or no oxygen. But this doesn’t mean that they are lifeless: Wetlands are full of unique water-loving plants and wildlife that have adapted to wet environments.

Wetlands can take many different forms, depending on the local climate, water conditions and land forms and features. For example, swamps are dominated by woody trees or shrubs. Marshes often have more grasslike plants, such as cattails and bulrushes. Bogs and fens are areas that accumulate peat – deposits of dead and partly decomposed plant materials that form organic-rich soil.

Trillions of dollars in ecological benefits

Wetlands are important environments for many reasons. They provide ecological services whose value has been estimated to be worth more than US$47 trillion per year.

For example, wetlands support very high levels of biodiversity. Scientists estimate that 40% of all species on Earth live or breed in wetlands.

Wetlands are critical homes or stopovers for many species of migratory birds. In the central U.S. and Canada, for example, wetlands in the so-called prairie pothole region on the Great Plains support up to three-quarters of North America’s breeding ducks.

The hunting and conservation group Ducks Unlimited works to conserve prairie pothole wetlands on North America’s Great Plains.

Along with providing important habitat for everything from microbes to frogs to waterfowl, wetlands also work to improve water quality. They can capture surface runoff from cities and farmlands and work as natural water filters, trapping excess nutrients that otherwise might create dead zones in lakes and bays. Wetlands can also help remove other pollutants and trap suspended sediments that cloud water bodies, which can kill aquatic plants and animals.

Because wetlands are often in low-lying areas of the landscape, they can store and slowly release surface water. Wetlands can be extremely important for reducing the impacts of flooding. In some places, water entering wetlands can also recharge groundwater aquifers that are important for irrigation and drinking water.

Wetlands also act as important carbon sinks. As wetland plants grow, they remove carbon dioxide from the atmosphere. They they die, sink to the bottom of the wetland and decompose very slowly.

Over time, the carbon they contain accumulates in wetland soils, where it can be stored for hundreds of years. Conserving and restoring wetlands is an important strategy for regulating greenhouse gases and mitigating the impacts of climate change.

Resources at risk

Despite the many valuable services they provide, wetlands are constantly being destroyed by draining them or filling them in, mainly for farming and development. Since 1970, the planet has lost 35% of its wetlands, a rate three times faster than the loss of forests.

Destruction and degradation of wetlands has led to the loss of many organisms that rely on wetland habitat, including birds, amphibians, fish, mammals and many insects. As one example, many dragonfly and damselfly species are declining worldwide as the freshwater wetlands where they breed are drained and filled in. A marsh or bog may not look like a productive place, but wetlands teem with life and are critically important parts of our environment.

Disclosure statement
Jon Sweetman receives funding from the US EPA for work on wetland restoration. He is affiliated with the Society for Freshwater Science, the Ecological Society of America, and the Society of Wetland Scientists

Inside global water-conflict hotspots

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Water in well. Source: Suhasajgaonkar, CC BY-SA 4.0, via Wikimedia Commons
Water in well. Source: Suhasajgaonkar, CC BY-SA 4.0, via Wikimedia Commons

By Bob Koigi, FairPlanet (CC BY-NC-ND 4.0).

For thousands of years, bodies of water have been attractions around which the very first civilizations formed, offering people fresh drinking and irrigation water; however, due to their high value and scarcity, they have also been sources of contention, creating competition among communities and countries. Today, as climate change threatens the global supply of water, these conflicts are more pronounced in certain areas, escalating in disunity and violence.

As global water supplies dwindle, occasioned by unprecedented population growth, poor governance, weak infrastructure, climate change and pollution, among other factors, nations and citizens are rising against each other in the fight for the scarce and necessary resource, inducing experts, including UN Secretary Generals, to posit that future wars will be fought over water rather than oil.

Transboundary water conflagrations have redefined foreign relations in the 20th century: from Iran, which has for years been engaged in protracted clashes with Afghanistan over the sharing of the Helmand River’s waters, to Pakistan’s conflict with India that dates back to the 1960s due to the waters of the Indus River – used as a weapon of war in the dispute over Kashmir -, as well as the clash between Egypt, Ethiopia and Sudan over the construction of the Grand Renaissance Dam that will store 10 million cubic metres of water, and the intermittent clashes between muslim Fulani herders and christian farmers in Nigeria over lack of rain and pasture. 

Indeed, in 2017, water was attributed as a key factor in conflicts in over 45 countries. 

Water-conflict hotspots

There are an estimated 260 transboundary bodies of waters – lakes, rivers and aquifers that are shared by two or more nations – which supply water to over 2 billion people. They have been sources of livelihood, but have also had large roles in shaping inter-state and global geopolitics. 

According to a water conflict chronology, a breakdown of the 925 water conflicts that go back 5,000 years, a large share of water wars are related to agriculture due to the fact that the sector accounts for 70 percent of freshwater use. 

“The instability and conflicts associated with water have ripple effects that have shaped international relations and altered how we live. Key among them are migration and the emergence of water refugees,” said Fatma Abdalla, a water and environmental activist. “These developments are likely to become more pronounced going forward as the effects of climate change become more intense and supplies dwindle. It is a nightmare that governments and the international community haven’t given much thought to, but urgently should.”

Sustainable water agreements

However, even with water’s destabilising potential, there have been concerted efforts to arrest the runaway situation. From 1948, over 200 international water agreements have been negotiated and signed, among them the UNECE Water Convention, which spells out the framework for transboundary water cooperation globally. Others include the Indus Waters Treaty of 1960 between Pakistan and India and the Global Water Convention on Transboundary Rivers and Lakes, chaperoned by the United Nations, which includes the commitments of 43 countries.  

“Now more than ever, there needs to be cooperation and a shared framework among sectors that are heavily dependent on water, such as energy, sanitation, agriculture, navigation and industry in order to have a harmonised and sustainable approach to address the biting water shortage,” argues Jessica Rotich, a Water, Sanitation and Hygiene (WASH) expert. “Governments, private sectors and development agencies must therefore work together to streamline a workable formula.” 

It is a statement corroborated by the Water, Peace and Security Partnership, WRI and the Pacific Institute who, through a report dubbed Ending Conflicts over Water: Solutions to Water and Security Challenges, highlighted a series of strategies that are crucial to taming water-based conflicts – among them political and legal implementations, policy and governance strategies, economic and financial tools and science and engineering approaches. 

Tech to the rescue

Technology has also been at the forefront of tackling water-related conflicts with great results. The Water, Peace and Security (WPS) partnership, a coalition of six European and American NGOs, has come up with Global Early Warning Tool, that bets on machine learning to predict conflicts before they arise by combining data on population density, droughts, flooding, crop failure, and rainfall among other data sources to highlight conflict warnings. The hotspots are displayed in a red-and-orange Mercator projection and are narrowed down to the administrative districts. The tool has identified 2,000 prospective conflict zones with an accuracy rate of 86 percent. 

“As factors that drive instability and conflict become more pronounced and water now starts being used as a tool of war and terrorism, which may ultimately create failed states, there has to be a change in our way of doing things,” Abdalla advocated. “We have to bring everyone onboard in conservation efforts, boosting investment in water initiatives, embracing innovations that deliver payoffs and supporting entrepreneurs who have dedicated themselves to saving our planet thanks to their innovative initiatives.”

 

Natural Resources Necessary to Feed World Are at a ‘Breaking Point,’ Warns FAO

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Photo by Tim Mossholder on Unsplash
Photo by Tim Mossholder on Unsplash

“Taking care of land, water, and particularly the long-term health of soils is fundamental to accessing food in an ever-demanding food chain.”

By Jessica Corbett, Common Dreams (CC BY-NC-ND 3.0).

A United Nations report released Thursday detailing humanity’s degradation of natural resources warns swift and sweeping reforms are needed to keep feeding the growing global population.

“The pressures on land and water ecosystems are now intense, and many are stressed to a critical point.”

The new U.N. Food and Agriculture Organization (FAO) report argues that “a sense of urgency needs to prevail over a hitherto neglected area of public policy and human welfare, that of caring for the long-term future of land, soil, and water.”

“Taking care of land, water, and particularly the long-term health of soils,” the publication explains, “is fundamental to accessing food in an ever-demanding food chain, guaranteeing nature-positive production, advancing equitable livelihoods, and building resilience to shocks and stresses arising from natural disasters and pandemics.”

Entitled The State of the World’s Land and Water Resources for Food and Agriculture: Systems at breaking point (SOLAW 2021), the report declares that “time is of the essence.”

That tone is echoed by FAO Director-General Qu Dongyu in a foreword to the report, which he says provides “evidence of the changing and alarming trends in resource use.”

“The pressures on land and water ecosystems are now intense, and many are stressed to a critical point,” Qu writes. “It is clear our future food security will depend on safeguarding our land, soil, and water resources.”

Already, human-induced soil degradation affects 34% of land used for food while water scarcity threatens 3.2 billion people—nearly half the total human population—in agricultural areas, according to SOLAW 2021.

Alongside its broad warning that “the interconnected systems of land, soil, and water are stretched to the limit,” the report emphasizes that “current patterns of agricultural intensification are not proving sustainable,” and “farming systems are becoming polarized,” with an “increasing concentration of land under a relatively small number of large commercial farming enterprises.”

Recognizing the need to better manage and safeguard land and water resources essential for food production, the report offers four key takeaways:

  • Land and water governance has to be more inclusive and adaptive;
  • Integrated solutions need to be planned at all levels if they are to be taken to scale;
  • Technical and managerial innovation can be targeted to address priorities and accelerate transformation; and
  • Agricultural support and investment can be redirected towards social and environmental gains derived from land and water management.

“Current patterns of agrifood production are not proving sustainable,” Qu said Thursday at the report’s launch event. “Yet, agrifood systems can play a major role in alleviating these pressures and contributing positively to climate and development goals.”

In his foreword, Qu notes that “a meaningful engagement with the key stakeholders—farmers, pastoralists, foresters, and smallholders—directly involved in managing soils and conserving water in agricultural landscapes is central.”

“These are nature’s stewards and the best agents of change to adopt, adapt, and embrace the innovation we need to secure a sustainable future,” he adds.

Some of those same stakeholders have been critical of the U.N. agency in recent months.

A coalition of food justice advocates last week sent a letter to Qu calling on the FAO to cut ties with CropLife International, warning that any collaboration with the agrochemical trade association “undercuts your agency’s critical—and urgently needed—support for agroecology, which FAO itself notes ‘can support food production and food security and nutrition while restoring the ecosystem services and biodiversity that are essential for sustainable agriculture.'”

Earlier this year, the FAO leader’s remarks at the U.N. Food Systems Summit were among those flagged by justice campaigners as evidence that the September event was “paving the way for greater control of big corporations over global food systems and misleading the people through corporate-led false solutions.”

Just before the summit, during a counter-mobilization, Razan Zuayter of the People’s Coalition on Food Sovereignty had said that “food systems can be transformed through the respect of food sovereignty via the will of landless peasants, small farmers, and fishers.”

“We have shown that the people are hungry for real change,” Zuayter added, “and are willing to do whatever it takes to fight for and reclaim their land, their rights, and the future of food systems.”