The study, published in Frontiers in Sustainable Cities, was led by Xiaoyan Ye, Yian Xu, and Jinyuan Tu of Shaoxing University in China. The team conducted a structured evidence synthesis of 62 peer-reviewed publications drawn exclusively from high-impact, Q1 journals, selected through a PRISMA-guided screening process that began with 2,842 records from the Web of Science and Scopus databases. After removing duplicates and screening titles, abstracts, and full texts, the researchers coded each publication across five critical stewardship dimensions: funding and costs, governance and institutions, aesthetics and perception, space and equity, and technology and data. Their central finding is stark: post-construction stewardship challenges almost never appear in isolation. Instead, they cluster and compound, forming systemic patterns of degradation that the authors trace back to a single structural fault line.

That fault line is what the researchers call the CAPEX-OPEX divide. Capital expenditure, or CAPEX, refers to the highly visible money spent designing and building green infrastructure, while operational expenditure, or OPEX, covers the chronic, less glamorous costs of watering, pruning, monitoring, repairing, and engaging communities over decades. The synthesis shows that CAPEX is politically and administratively far easier to authorize than OPEX. Politicians and city agencies gravitate toward the photogenic moment of planting, while the unglamorous work of keeping trees alive and rain gardens functioning remains chronically underfunded. Drawing on the lens of urban political ecology, the authors argue this is not a mere budgeting technicality but a structural driver of socio-ecological outcomes, one that determines which neighborhoods keep their green assets and which watch them decay.

The evidence for this divide is remarkably concrete. Within the analyzed corpus, the most frequent co-occurrence of challenges was the triple intersection of governance, funding, and technology deficits, appearing in 14 publications. Studies in this cluster documented municipalities that lacked both the capital and the monitoring tools to sustain their greening programs. One frequently cited case found that certain United States tree-planting initiatives allocated as little as five percent of total budgets to watering, a figure that bodes poorly for sapling survival in a warming climate. Other records documented systematic budget cuts across United Kingdom parks and chronic institutionalization gaps that leave nationwide planting programs structurally precarious. The message across these cases is consistent: installation without institutional commitment is a recipe for premature ecological decline.

But the synthesis goes further, revealing a striking structural paradox in how design choices shape stewardship outcomes. Capital-intensive, conventional designs, such as manicured lawns, engineered sky gardens, and formal plazas, were most frequently linked with governance challenges (21 publications) and funding challenges (18 publications). These high-cost landscapes routinely outpace municipal operational capacities, generating institutional friction and unfunded maintenance mandates. Conversely, naturalized or wild designs, which embrace spontaneous vegetation and ecological succession, ran into an entirely different obstacle: public and administrative resistance. These projects were strongly associated with aesthetic and perception challenges, appearing in 16 publications, as residents and officials reacted to long grass and untidy-looking plantings with complaints about neglect, pests, and safety.

The aesthetic backlash, as the authors term it, turns out to be deeply institutionalized rather than merely a matter of public taste. The synthesis documents French public administrators who feared that pesticide-free green spaces would make their municipalities appear poorly managed, and punitive regimes in Xi’an, China, where the mere presence of spontaneous vegetation in lawns triggered wage deductions for frontline maintenance workers. These cases illustrate that landscape preferences are shaped by cultural expectations, perceived safety, and ingrained maintenance norms, not simply by ecological knowledge. Without deliberate design cues that signal intentional care, such as mown edges or flowering borders framing wilder interiors, top-down ecological designs remain vulnerable to societal rejection, administrative suppression, and eventual regression back to conventional, resource-hungry management.

Perhaps the most troubling pattern involves equity. Distributed green infrastructure such as street trees and pocket parks was strongly associated with space and equity challenges, appearing in 14 publications, and with governance challenges in 11. The recurring theme is the offloading of stewardship responsibilities onto residents, and disproportionately onto marginalized communities, without adequate financial or technical support. The corpus documents park development fees accumulating in wealthy Los Angeles districts while disadvantaged areas remain capital-starved, tree watering outsourced to unpaid residents in semi-arid regions, physical fences excluding marginalized users from restored water commons in Bengaluru, and the structural exclusion of Indigenous communities from collaborative forest governance in New Zealand. The authors warn that devolving maintenance labor without legal recognition, compensation, or support risks accelerating green gentrification and exclusionary spatial practices.

From these systemic associations, the researchers advance three interpretive propositions that map distinct pathways of stewardship degradation. The first, bureaucratic starvation and technocratic blindness, describes the direct administrative manifestation of the CAPEX-OPEX divide, where visible capital investments are decoupled from stable operational budgets and monitoring capacity. The second, the aesthetic backlash, captures how naturalized designs face socio-cultural resistance and punitive administrative regimes when cues to care are absent. The third, systemic marginalization, describes how limited municipal capacity systematically transfers maintenance burdens onto residents, reinforcing spatial inequities and environmental injustice. The authors are careful to frame these as heuristic explanations grounded in co-occurrence patterns rather than proven causal chains, positioning them as hypotheses for future comparative testing rather than deterministic predictions.

The study is candid about its own boundaries. Because the search was confined to English-language literature in two databases and filtered to Q1 journals, the corpus is geographically skewed: roughly 68 percent of the analyzed publications focus on the Global North, with Europe alone accounting for 25 studies, while South America and Africa together represent just 8 percent. The authors acknowledge that journal impact factor is not a valid proxy for study quality and that their threshold-based selection may overlook innovative grassroots governance models in the Global South. They also note a prevailing publication bias toward deficit narratives, meaning the literature they synthesized documents failures far more often than successes, so the frequency of these challenges in the corpus cannot be read as a global failure rate. Emerging counter-models, including endowed maintenance funds, community land trusts, and legally binding co-management agreements, do show the divide can be bridged.

The practical prescription the authors offer is a paradigm they call collaborative stewardship capacity: the durable legal, financial, technical, and participatory ability of public agencies and communities to care for ecological assets, shielded from the volatility of short-term funding cycles. They propose concrete mechanisms, including zoning ordinances requiring fully capitalized operational trust funds before building permits are issued, legally binding community co-management charters, and long-term ecological performance metrics embedded in annual municipal budget audits. The underlying argument is deceptively simple and potentially transformative: sustainable urban greening is not achieved on the day of planting but is a continuous socio-ecological contract. Cities that fail to secure the legal, financial, and participatory machinery of long-term care, the authors conclude, risk watching their flagship climate adaptation projects become what they memorably call exclusionary green ruins, monuments to ambition that outlived its maintenance budget.

Subject of Research: The governance disconnect between urban green infrastructure design and long-term stewardship

Article Title: The design–stewardship disconnect in urban greening governance: a structured evidence synthesis

Article References: Ye, X., Xu, Y., & Tu, J. (2026). The design–stewardship disconnect in urban greening governance: a structured evidence synthesis. Frontiers in Sustainable Cities, 8, Article 1956151. https://doi.org/10.3389/frsc.2026.1956151

Image Credits: AI Generated

DOI: 10.3389/frsc.2026.1956151

Keywords: urban green infrastructure, stewardship, CAPEX-OPEX divide, urban governance, nature-based solutions, environmental equity, urban political ecology, green gentrification, landscape maintenance, evidence synthesis, urban forestry, climate adaptation