Wetland conservation

Threats to wetlands

According to UN Climate Change News, wetlands are disappearing three times faster than forests. Wetlands are facing growing threats that put their health at risk. Urban development, pollution, land drainage, and climate change are endangering these valuable habitats that serve as essential flood buffers and wildlife havens.

Habitat loss

Coastal wetlands are very vulnerable to habitat loss due to erosion, subsidence, sea-level rise, development, and drainage. Common direct impacts of habitat loss to wetlands include removal of vegetation, fluctuation in water levels, and building construction. The decline in wetland habitat has far-reaching economic and societal implications. The degradation and loss of these habitats have resulted in the reduction of fish populations in terms of both their size and diversity. This, in turn, has led to a decrease in the availability of opportunities for both the commercial fishing industry and recreational fishing, impacting the livelihoods and leisure activities of many individuals and communities. Not only is this habitat loss affecting the fish residing in these wetlands and the recreational activities that come from them, the reduction in fish populations resulting from habitat loss in wetlands can disrupt the delicate balance of the ecosystem. As fish play a crucial role in the food chain, their decline can lead to changes in the abundance and behavior of other species, affecting the entire wetland ecosystem. Wetland habitat loss also contributes to the increasing stress of remaining wetlands. Due to effects from habitat fragmentation, the remaining wetlands are then facing the increasing volume of pollution, surface temperatures, decreasing landscape diversity, and connectivity for marine resources including fish and other sensitive wildlife. Other factors that contribute to wetland loss are agricultural drainage, groundwater dewatering, and urban sprawl from road and rail construction.

Pollution

Wetlands are susceptible to the detrimental effects of pollution, which can undermine their ecological health and diminish their vital functions. Pollution from various sources, including agricultural runoff, industrial discharges, and urban contaminants, poses a significant threat to the delicate balance of wetland ecosystems, affecting not only their plant and animal residents but also the critical services they provide. According to an article published by NOAA Fisheries, due to high concentrations of pollution, a wetland's filtration system capacity can become overwhelmed thus allowing excess nutrients and toxic chemicals to concentrate in waterways which create dead zones that leave organisms that live in the water to be unable to survive. Not only do wetlands only serve as conduits for the passage of plastic waste but also act as sites where plastic waste accumulates over time, posing enduring challenges. Human actions, including the construction of roads and the extraction of resources, have significantly disturbed wetland ecosystems. This has made previously drained wetlands susceptible to wildfires thus increasing the chance of air pollution from the toxic metals that wetlands have absorbed and stored resting in peat that can pose health threats to people and environment. Once a drained wetland ignites, "peatland fires are difficult to contain as they can smolder for weeks, months or even years. They produce copious of smoke and ash, filling the air with microscopic particles."

Invasive species

Invasive species are causing considerable harm to wetlands by outcompeting native plants and animals, thereby disrupting the delicate balance of these ecosystems. These invaders often grow more aggressively and can change the wetland's structure and function, reducing its capacity for flood control and water purification. Additionally, invasive species can negatively impact the availability of suitable habitats for native species and contribute to the overall degradation of wetland health. An example of one of the many organisms that pose as an invasive species threat to wetlands is the Nutria. The Nutria is a semi-aquatic rodent that originated from South America but was brought to the United States in 1889 due to the popularity of its fur, but over the years has taken over wetlands due to being released or escaping ranches. Due to their high reproductive rate and lack of implemented population control, these rodents have led to crop damage, decrease of native plants due to consumption, and an increase in flood damage due to their low made burrows.

Climate change

Climate change has a significant impact on wetlands, primarily through rising temperatures and altered precipitation patterns. These changes can lead to shifts in wetland ecosystems, affecting the distribution of plant and animal species. Additionally, increased temperatures can result in the loss of wetland habitat by killing temperature and salinity sensitive organisms and contribute to sea-level rise, which can further threaten the stability and function of coastal wetlands as barriers for vulnerable communities as well as leading to altered precipitation patterns and prolonged droughts, resulting in reduced water levels and drying of wetland areas. Changes in salinity is heavily affected by changes in precipitation, storm surges, and surface temperature. As temperatures rise, wetlands are susceptible to more frequent and severe wildfires. The increased fire risk can lead to the destruction of wetland vegetation, further diminishing their capacity to support wildlife and maintain their ecological functions. As wetland habitat decreases, Greenhouse Gasses (GHG) including methane, carbon dioxide, and nitrous oxide which account for approximately 60%, 20%, and 6% of global warming contributions respectively, would not be absorbed or sequestered, thus quickening a currently increasing climate change rate.

Governance

A 2018 global study published in Nature analyzed population trends of 461 species of waterbirds from over 25,000 monitoring sites across the world to identify the drivers of population change in wetland-dependent birds. The study found that national governance quality—measured through indicators like political stability, rule of law, and effectiveness of institutions—was one of the most significant predictors of waterbird population trends. Regions with stronger governance, such as parts of Europe and North America, tended to maintain stable or growing populations of waterbirds. In contrast, regions with weaker governance—including parts of Central Asia, Sub-Saharan Africa, and South America—showed widespread declines. These findings suggest that biodiversity conservation in wetlands cannot be achieved in isolation from broader political and governance reforms.

Under the United Nations' Sustainable Development Goals, the objectives of the 1971 Ramsar Convention were upheld, augmenting a "no-net-loss' policy encouraging most nations to move away from converting wetlands to croplands. Although rates of wetland conversion had been maintain or increased in some regions like Indonesia where tropical peat swamps have ben converted for industrial and agricultural use, rates of overall wetland conversion has declined in most countries.

Restoration efforts and projects

Numerous projects and organizations are actively contributing to wetland restoration efforts. They often collaborate with government agencies, local communities, and conservationists to rehabilitate degraded wetlands by implementing restoration plans. These initiatives include activities like re-establishing water flow, controlling invasive species, and replanting native vegetation, ultimately revitalizing wetland ecosystems and safeguarding their critical ecological functions. Current United States regulations require that any degradation or "take" caused by human development or pollution activities to wetland habitats be mitigated by recreating new wetland acreage or by paying incentives to restoration projects. For example, as a requirement of the "no-net-loss" of wetlands policy adopted by the National Park Service, any construction or similar activity on park lands having significant harmful impact to wetland habitat must mitigate by restoring at east one acre of wetland per acre affected or destroyed. The following list is not comprehensive.

National Oceanic and Atmospheric Administration (NOAA; USA 2022)

In Louisiana's Barataria Basin, NOAA and partners have begun construction on one of the largest habitat restoration efforts to date in a 1,200 acre marsh in hopes to restore and create a new habitat, reduce erosion, and protect communities.

Eden Reforestation Project (USA 2022)

The Eden Reforestation Project is a non-profit organization that collaborates directly with local communities and non-government/government organizations and focuses on global reforestation efforts. They work in various countries, employing local workers to plant trees and restore damaged forests, aiming to combat deforestation, alleviate poverty, and mitigate the effects of climate change. Eden relies on data-driven strategies in its restoration efforts and maintains a strong dedication to flexible management practices. This involves integrating the latest scientific insights, adapting methods as they evolve, and implementing tailored monitoring techniques for each project to ensure their effectiveness, reliability, and repeatability.

Comprehensive Everglades Restoration Plan (CERP; USA 2000–present)

The CERP is a multi-billion-dollar plan approved by the U.S. Congress in 2000 to save the wetlands of the Everglades in southern Florida with only 50% of its natural wetlands remaining. The goal of this plan is to increase freshwater storage, improve water quality, and re-establish the natural water flow. Out of the 68 restoration components outlined in the Integrated Development Strategy, 24 had been finalized by the end of 2021. During that same year, two additional projects were successfully concluded. In 2022, one project is on track for completion, while construction is actively progressing on nine other projects.

Yellow River Wetland Conservation (China 2019)

The Yellow River Wetland Conservation Project is an initiative in China aimed at preserving and restoring the critical wetland ecosystems along the Yellow River, also known as the Huang He. The Yellow River is one of China's major rivers, and it flows through several provinces, supporting various wetland habitats and wildlife. The project focuses on a range of activities including wetland restoration, biodiversity protection, and sustainable land use.

Danube River Basin Program (Europe 2023–present)

Dunube4all is a supported effort to restore ocean and waters of Europe. The goal of this project is to restore freshwater ecosystems in the Danube River Basin by 2030. The project employs a cross-sector approach to tackle the wide range of environmental issues within the Danube River Basin. These encompass the significant loss of river connectivity, related ecosystem decline, declines in biodiversity, and the necessity for fresh approaches to nature-centered solutions that can rejuvenate our relationship with the river.

Burmese Python Management Project (Florida, USA 2024–present)

The Burmese Python Management Project in Florida's Everglades National Park addresses the ecological impact of invasive Burmese pythons, which have contributed to significant declines in local wildlife populations. These non-native snakes have established a breeding population in the Everglades, affecting species such as raccoons, opossums, and marsh rabbits. The project uses drone-based telemetry technology, including systems developed by Wildlife Drones to track and monitor multiple tagged pythons across large areas, improving data collection and supporting efforts to manage the python population and restore the Everglades ecosystem.