A Restoration Effort in Southcentral Chile Aims to Renew a Damaged Wetland

Luisa Valenzuela, an environmental advocate in southcentral Chile, vividly recollects the second she discovered her calling. It was a spring day 18 years in the past when, from the doorstep of her residence in Hualpén, she watched a pair of geese flap their wings desperately at a truck illegally dumping particles into the Vasco Da Gama-Chimalfe, a wetland that abuts her neighborhood. She suspected the birds had been defending their eggs or chicks. “That day I promised the wetland that I’d grow to be the voice for the species that stay there,” she says. 

Valenzuela based the Vasco Da Gama-Chimalfe Wetland Protection Committee and devoted her life to safeguarding the habitat, which is an element of a bigger community of coastal wetlands in and round Concepción, Chile’s second-largest metropolis after Santiago. The Rocuant-Andalién–Vasco Da Gama–Paicaví–Tucapel Bajo Wetland System spans 11 sq. miles and is underneath menace from industrial growth, city growth, and air pollution, all of which have drastically decreased its dimension. “What we see at present is only a remnant of a once-vast wetland,” says Heraldo Norambuena, a biologist specializing in pure useful resource administration on the Universidad Santo Tomás. 

Consequently, there’s much less habitat out there for birds which have lengthy relied on the wetlands, from residents like Yellow-billed Pintails to susceptible Lesser Yellowlegs that fly right here from northern Alaska. “Returning to those websites is a part of their historic reminiscence,” Norambuena says.

This habitat loss has additionally undermined the ecosystem’s position as a pure buffer in opposition to floods, says Octavio Rojas, a catastrophe threat administration skilled at Universidad de Concepción. At this time, city infrastructure prevents rainwater from seeping out throughout the panorama and being absorbed. This has left metropolitan areas susceptible to flooding, a hazard that’s doubtless turning into extra frequent and intense as a result of local weather change—with lethal penalties. Swollen rivers from heavy rainfall in June 2023, as an example, pressured the evacuation of 1000’s of residents in south and central Chile and killed two individuals. 

A brand new $147 million wetland revitalization venture goals to show issues round. The venture is a pilot of the Americas Flyways Initiative (AFI), a collaboration between Audubon, BirdLife Worldwide, and the Improvement Financial institution of Latin America and the Caribbean. Harnessing a mixture of funding and dealing with communities, AFI has got down to facilitate 30 nature-based financial growth tasks that defend and restore crucial ecosystems by 2050.

Beginning with southcentral Chile, the initiative goals to improve the connectivity and conservation of websites essential to migratory birds, that are experiencing widespread inhabitants declines. Renewing the wetland system’s pure capacity to mitigate flooding may also profit residents. “It’s a win-win,” says Santiago Aparicio, director on the Americas Flyways Initiative for Audubon. “By defending birds, we guarantee higher circumstances for different species—together with ourselves.”

New Appreciation for an Undervalued Panorama

For many years, wetlands within the communities of Hualpén, Concepción, Talcahuano, and Penco had been thought of nugatory land. Improvement superior over them, filling them in to make means for roads, ports, Carriel Sur Worldwide Airport, and industrial zones.

But these ecosystems play essential roles. They assist mitigate local weather change by storing carbon. They regulate ecological steadiness: After Chile’s devastating 2010 earthquake, the Rocuant-Andalién wetland in Talcahuano buffered the influence of the ensuing tsunami, some researchers keep. And despite the fact that they’re diminished, their various habitats—which incorporates marshes, swamps, riparian zones, and estuaries—help an array of coastal and marshland fowl species. The Rocuant-Andalién wetland, residence to American Oystercatchers and 150 different birds, is of such significance to avian conservation that BirdLife Worldwide designated it a worldwide Essential Chook and Biodiversity Space in 2021.

With out authorized safety, city planning has lengthy ignored the area’s wetlands—however native communities haven’t. For years, neighborhood teams, together with Valenzuela’s, have been clamoring for better habitat safety. They’ve promoted neighborhood science to observe the ecosystems, filed environmental complaints, and raised consciousness by means of neighborhood excursions and college workshops.

In 2019, a regional municipal coalition succeeded in having the wetland system declared a precedence web site for conservation—a designation that promotes protecting measures however doesn’t preclude growth. The next 12 months, boosted by widespread public help, Chile enacted the City Wetlands Regulation, which permits the nationwide authorities to designate wetlands inside metropolis limits. The regulation goals to cease indiscriminate actual property growth in these habitats and combine them into metropolis planning for flood mitigation, recreation, biodiversity, and different elements. 

In opposition to this backdrop the Americas Flyways Initiative assembled a consulting crew to determine which interventions would have the best profit. The group included hydrologists, catastrophe threat specialists like Rojas, biologists like Norambuena, and neighborhood leaders comparable to Valenzuela. They knew, says crew chief Carolina Rojas, that to get buy-in from locals and personal landowners, they must combine the wetlands into the city matrix in ways in which balanced neighborhood wants, together with further housing and entry to public area. “AFI doesn’t search to impose restrictive obstacles,” says Rojas, who’s a geographer with the Centre for Sustainable Urban Development, a Chilean analysis group. 

On the identical time, Octavio Rojas says, the first purpose is to revive the system’s water flows “to present again its sponge-like capability.”

In weighing their choices for doing so, the crew drew largely on two research by Chile’s Ministry of the Atmosphere: one which identified zones most in want of restoration, and one other that outlined a land-use plan to construct system-wide resilience. 

Finally they proposed three floodable parks throughout the wetland system. To gradual runoff and permit water to extra readily soak into the bottom, every space will comprise inexperienced infrastructure comparable to rebuilt pure contours and native vegetation. A mixture of restored habitats will help resident and migratory birds alike. Folks, in the meantime, will get pleasure from new open areas and trails—and better security from excessive flooding amid an more and more chaotic local weather.

Whereas not all the areas recognized are at the moment protected underneath the city wetland regulation, the AFI crew hopes that the ecological and societal advantages that restoration guarantees will encourage their designation.

Loretto Arriagada, coastal resilience conservation supervisor in Chile for Audubon’s Latin America and the Caribbean program, is fast to level out that restoring wetlands gives financial advantages, too: decreased flood harm, extra fowl tourism, and carbon offsets generated by pure storage of CO2. Such advantages are important—and so is the work that it’ll take to realize them. 

A Higher Residence for Birds

In early March, Arriagada and wildlife conservationist and photographer Katherine Sanhueza Bravo drive to one of the vital threatened areas that migratory birds depend on, in line with AFI’s evaluation. The Rocuant-Andalién wetland comprises a few of the healthiest intact habitat, however many years of neglect and abuse have considerably degraded the pure panorama in a portion referred to as Carriel Norte, the place Better Concepción is encroaching. But it surely’s not simply city development threatening this sector. An lively industrial zone brings persistent issues: rubbish accumulation, stray canine that prey on birds, poor waste administration.

“Have a look at how the wetland has been crammed in,” says Arriagada. Forward lies a maze of landfills which have multiplied over time, forming as much as 15-foot-high mounds of sand over what had been as soon as reedbeds.  

Even amongst these synthetic hills, amid piles of dust and cement, birds persist. Southern Lapwings, with white chests and black crowns, wander unfazed by the fixed truck site visitors. Lesser and Better Yellowlegs feed on macroinvertebrates within the riverbed, fattening up in preparation for his or her impending journey north. Within the distance, canals linked to marshland play seasonal host to Hudsonian Godwits and Whimbrels. Their calls, says Sanhueza, are just like the soundtrack of the wetland system.

Like many individuals within the area, Sanhueza didn’t know she lived on a wetland—till she learn an indication whereas biking by means of Rocuant-Andalién on her solution to college. “When individuals’s properties flood in winter, they see it as an issue,” she says. “However as soon as they perceive the wetland, they notice restoring it truly helps scale back flooding.”

Sanhueza has made it her mission to assist others uncover these hidden ecosystems. She based a fowl information firm, Chile Birds, to unfold enthusiasm for the wetland and the birds it helps—even in a diminished state. “Birds are cussed,” she says. People are too, she provides—many stay within the neighborhoods surrounding Carriel Norte regardless of the flooding and air pollution. 

Arriagada nods, then notes there’s a key distinction. Birds are resilient, however they’ll’t tackle the threats to the habitat they rely on. “It’s our accountability to handle and scale back them—to cease degrading these ecosystems,” she says.

As AFI restores essential wetland habitat within the coming years, it might mark a significant turning level in bringing about that change.

This story initially ran within the Fall 2025 challenge as “Pure Allies.” To obtain our print journal, grow to be a member by making a donation today.