In Tucson, Arizona, a profound ecological shift has been quietly unfolding for decades, moving beyond traditional habitat restoration to foster a deeper reconnection with local landscapes, embracing their imperfections. This innovative approach, known as reconciliation ecology, champions the idea of increasing biodiversity within human-dominated environments, offering a vital conservation strategy for the Anthropocene. It represents a departure from older models, transforming how communities engage with both the land and each other.

The roots of this movement can be traced back to the burgeoning environmental awareness of the 1960s, which spurred significant conservation and ecological restoration efforts throughout the following decades. However, the contemporary discourse has evolved. Instead of solely focusing on "restoring" a degraded urban riparian corridor, the emphasis has shifted to "reconciliation." This term, coined in 2003, signifies a more nuanced understanding of our role in shaping ecosystems.

Angelantonio Breault, a lifelong Tucsonan, embodies this evolving perspective. Growing up near the Santa Cruz River’s floodplain, he initially perceived it as little more than a ditch. His journey into ecology and his regular visits to the river for birdwatching and wildflower identification ignited a sense of stewardship and fostered a personal connection to this vital watercourse. This personal awakening led him to establish the Reconciliación en el Río Santa Cruz community initiative. Unlike earlier environmental campaigns that often sought to return landscapes to a pristine, idealized state, Breault’s project prioritizes reimagining human engagement with the land, emphasizing shared responsibility and reciprocal relationships.

The historical context for Tucson’s environmental consciousness is deeply intertwined with the challenges of unchecked development and resource depletion. As urban expansion accelerated in the early 20th century, exacerbated by overgrazing, unsustainable groundwater pumping, and the construction of infrastructure, the Santa Cruz River, a vital artery stretching 200 miles from northern Mexico, began to suffer. By the mid-20th century, Tucson’s section of the river had completely dried up, a stark illustration of the ecological toll.

While cities like Phoenix, a mere two hours north, pursued rapid growth and extensive new housing developments, Tucson embarked on a different path. Local environmentalists, recognizing the critical need to curb development, formed coalitions and successfully lobbied the city government. Within a decade, Tucson made a significant commitment by purchasing farmlands west of the city limits, a strategic move to alleviate pressure on groundwater resources. Simultaneously, smaller water systems were consolidated under the unified management of Tucson Water, establishing a valley-wide infrastructure with a clear agenda focused on the responsible stewardship of precious water resources.

This proactive approach extended to public awareness campaigns and innovative water management practices. In 1977, Tucson launched its first "Beat the Peak" campaign, aiming to educate residents about water consumption during peak demand periods and promote the use of wastewater for landscape irrigation. By 1984, Tucson had become a pioneer in water recycling, becoming one of the first cities in the nation to utilize treated wastewater for irrigating parks and golf courses.

The dedicated activists who had long advocated for slower growth successfully built a broad coalition that championed the protection of habitats for numerous vulnerable, threatened, and endangered species. Their persistent efforts led to the establishment of bond-funded land conservation programs, the creation of a robust system for preserving open spaces, and the implementation of measures to mitigate the impact of development on critical riparian habitats. This sustained advocacy culminated in the adoption of the Sonoran Desert Conservation Plan by the Pima County Board of Supervisors in October 1998. Initially designed with two primary objectives – protecting endangered species and imposing significant development restrictions – the plan has since expanded its scope to encompass a wide range of environmental initiatives, including habitat restoration and the implementation of stormwater harvesting systems.

The Santa Cruz River, flowing through Tucson, serves as a powerful emblem of the city’s leadership in urban conservation. Its transformation from a parched, trash-strewn channel to a revitalized ecosystem underscores the success of the reconciliation ecology approach. Breault and his contemporaries recognized that a complete "restoration" to a pre-development state might be unattainable for the Santa Cruz, given its historical degradation. Instead, they embraced a vision of "reconciliation," seeking to foster a new equilibrium between human activity and ecological health.

"I see the Santa Cruz as a portal," Breault explained, articulating his philosophy. "It’s a way for people to explore the authentic relationships they already have with the natural world." He emphasizes the power of participatory stewardship programs, stating, "We know the best way to engage people is through participatory stewardship programming. People don’t need to have their hand held." Breault firmly believes that individuals can forge their own connections to nature, regardless of past human impacts, and that even seemingly damaged ecosystems possess the inherent capacity to support life and thrive.

This philosophy found practical application in late 2017 when the endangered Gila topminnow was rediscovered downstream of the Nogales International Wastewater Treatment Plant. To bolster the aquifer and its surrounding riparian habitat, Tucson Water began channeling up to 2.8 million gallons of treated recycled water daily into the river, south of downtown. A collaborative effort involving scientists from the Arizona Game and Fish Department and the University of Arizona ensued, where over 700 Gila topminnows were carefully collected upstream and relocated to a release point near downtown Tucson, a stark contrast to the river’s previously entirely dry state.

As of today, the Santa Cruz River flows intermittently for approximately a mile near downtown Tucson. While some sections remain ephemeral, others are perennial, creating a dynamic and ever-changing landscape. Even without the benefit of monsoon rains, the consistent supply of treated effluent is sufficient to nurture the resurgence of wetlands and marshes. Cottonwood trees, which had vanished over six decades ago, are reappearing, the Gila topminnow is successfully reproducing, and an impressive 40 other native plant and animal species have returned to the area. This ecological revival has also drawn people back to the riverbanks, whether for organized trash cleanups, impromptu invasive plant removal sessions, or simply for the quiet enjoyment of wildlife observation.

Breault encourages active participation, inviting individuals to contribute in their own unique ways. "Get in line," he advises. "Do what you do best; tell stories." He envisions a vibrant calendar of river-focused events, including storytelling workshops, art-making meetups, and interpretive nature walks, while also acknowledging the organic emergence of other community-led initiatives. "We don’t have to do everything," he muses. "The river knows. We just have to be down there together." This sentiment encapsulates the essence of reconciliation ecology: a collaborative, community-driven effort to foster coexistence and mutual respect between humans and the natural world, recognizing the inherent value and resilience of even the most challenged landscapes. This evolving paradigm offers a hopeful blueprint for navigating the complexities of the Anthropocene, demonstrating that vibrant ecosystems can indeed flourish in the heart of human activity.