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Ecological Intelligence

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Ecological Intelligence / Subject

urban planning

Peer-reviewed Africa

Nigeria's urban expansion fragmented nature even as built-up patches joined

Evidence
Peer-reviewed
Geography
Oye-Ekiti, Nigeria
System
Urban land cover and habitat fragmentation

WHAT THE EVIDENCE SAYS

Built-up land increased from 3.12 square kilometres in 1987 to 94.23 in 2025, while forest decreased from 70.44 to 49.77. Landscape metrics reflect natural-cover fragmentation, and a cellular automata–Markov model projects additional conversion by 2065.

WHY IT MATTERS / OUR READ

Urban design needs to measure ecological patch configuration, stormwater pathways and connectivity, not only percent green cover.

CAVEATS / UNCERTAINTY

Historical maps have classification uncertainty; the 2065 results are modeled scenarios, not confirmed development or measured wildlife responses.

SOURCE

Discover Sustainability — Salau and Akinyemi (2026)
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Land-cover classifications document growth; a model explores one possible future.

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Peer-reviewed Asia

A greener urban-growth scenario still left old habitat barriers intact

Evidence
Peer-reviewed
Geography
Yangtze River Delta urban region, China
System
Urban development; ecological networks; landscape connectivity

WHAT THE EVIDENCE SAYS

A spatial scenario study of the Yangtze River Delta compared future urbanization and ecological-protection pathways through 2035. It projected major built-up expansion under a development-oriented scenario and relatively small net ecological-space gains under protection assumptions; important inherited connectivity bottlenecks persisted even in the more favorable scenario.

WHY IT MATTERS / OUR READ

A planning rule that slows habitat conversion does not necessarily restore connections already severed by infrastructure. Effective blue-green network plans should distinguish avoided loss, restored passage and feasible long-term management.

CAVEATS / UNCERTAINTY

These are model scenarios, not measured 2035 outcomes or validated animal movements. Land-cover definitions, scenario inputs and spatial resolution constrain quantitative forecasts; accepted journal version awaits final formatting.

SOURCE

Frontiers in Ecology and Evolution · Yangtze Delta urban-connectivity scenario study
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Yangtze River Delta connectivity modeling distinguishes prevented future damage from repairing existing fragmentation.

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Peer-reviewed North America

US city density did not erase consumption's ecological footprint

Evidence
Peer-reviewed
Geography
United States census tracts
System
Urban consumption; ecological footprint and spatial planning

WHAT THE EVIDENCE SAYS

Researchers estimated 2021 consumption across 52 categories in all 83,603 populated US census tracts. Per-capita ecological footprint was somewhat higher in urban tracts than suburban or rural ones; aggregate urban footprint scaled approximately linearly with population across alternative city boundaries.

WHY IT MATTERS / OUR READ

Planning debates should distinguish a city's direct spatial footprint from its indirect demand for land, materials, goods and services far outside city limits.

CAVEATS / UNCERTAINTY

Footprint estimates are model-based 2021 consumption accounting, not direct ecological condition or proof that density has no transport or habitat benefits. Average differences by settlement class were small and sensitive to definitions.

SOURCE

Nature Communications — primary urban consumption footprint analysis
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An 83,603-census-tract analysis found slightly higher per-person ecological footprints in cities and near-linear scaling with urban population.

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Urban green space is losing bird functional space before every diversity metric agrees

Evidence
Peer-reviewed urban field survey and trait analysis
Geography
Harbin, Northeast China
System
Urban green space / blue-green network

WHAT THE EVIDENCE SAYS

Bird communities across 24 urban green-space patches were analyzed against a composite urbanization gradient. Species richness declined consistently; two-dimensional functional space occupied by the community also contracted, especially for larger-bodied, higher hand-wing-index and aquatic-associated traits. Functional richness declined too, but that result was sensitive to how residual spatial structure was modeled. Water-body cover, vegetation cover and foliage-height diversity were associated with different functional groups.

WHY IT MATTERS / OUR READ

Urban biodiversity design should not treat every green polygon as equivalent. Water, vertical vegetation structure and blue–green connectivity can retain different parts of the avian trait space, while a single richness score may not reveal which ecological functions are disappearing.

CAVEATS / UNCERTAINTY

The study is cross-sectional and limited to 24 patches in one city. Trait–habitat relationships are associations rather than experimental treatment effects, and the functional-richness result is explicitly model-sensitive.

SOURCE

Journal of Applied Ecology — primary study
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Across 24 Harbin green-space patches, species richness declined with urbanization and occupied trait space contracted, while the functional-richness trend itself was sensitive to spatial modeling.

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