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Ecological Intelligence

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Ecological Intelligence / Subject

Landscape ecology

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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Latin America & Caribbean

Forest configuration may change zoonotic risk in ways forest area alone does not

Evidence
Peer-reviewed observational landscape epidemiology
Geography
Brazilian Atlantic Forest municipalities
System
Atlantic Forest / agricultural mosaics

WHAT THE EVIDENCE SAYS

Using municipality-level Brazilian spotted-fever incidence from 2001–2019 with landscape and climate variables, mixed models found higher incidence in less fragmented landscapes when riparian forests were embedded in pastoral and agricultural mosaics. Cases also tended to be higher in cooler municipalities. The study treats landscape structure as part of the host–vector–human exposure system rather than assuming forest amount has one-directional effects.

WHY IT MATTERS / OUR READ

Restoration design can change exposure pathways as well as habitat. In disease-sensitive landscapes, where forest is placed and how it connects to old-growth forest, farms and people may matter as much as total restored area. The practical lesson is to integrate disease surveillance and landscape history into restoration planning instead of treating riparian planting as ecologically context-free.

CAVEATS / UNCERTAINTY

This is an observational municipality-level study and does not show that riparian restoration itself causes Brazilian spotted fever. Tick, host and human-exposure processes vary locally, and the policy implications require site-specific epidemiological and ecological validation.

SOURCE

Journal of Applied Ecology — primary study
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Brazilian spotted-fever incidence was highest in less fragmented Atlantic Forest landscapes where riparian forest sat inside pasture–agriculture mosaics—complicating simple “restore more riparian forest” prescriptions.

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Peer-reviewed Europe

For stump-dwelling beetles, where the clearcut sits mattered more than whether the spruce stand was uniform

Evidence
Peer-reviewed
Geography
Boreonemoral forest zone, Sweden
System
Managed spruce forest / clearcuts

WHAT THE EVIDENCE SAYS

Beetles were sampled from 150 spruce stumps across five paired locations comparing fast-growing spruce monocultures on former arable land with structurally varied stands. Researchers found 1,378 beetles representing 67 species. Species richness differed by site location but not significantly by stand type; variation partitioning showed location explained about three times more species-composition variation than stand type.

WHY IT MATTERS / OUR READ

A stand label is a weak substitute for landscape context. For decisions such as stump harvesting, the surrounding species pool and configuration may matter enough that managers need landscape-scale screening rather than assuming monoculture stumps are low conservation value.

CAVEATS / UNCERTAINTY

Only five site pairs were studied, the analysis sampled one substrate type with bark sieving, and the study did not directly model which surrounding landscape features caused the site effect. Most recorded species were common rather than currently red-listed.

SOURCE

Journal of Insect Conservation — primary study
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Across five Swedish site pairs, landscape location explained about three times more community variation than stand type, and spruce monocultures were not significantly poorer in stump-associated species richness.

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Peer-reviewed North America

Urban connectivity may work differently once organisms are allowed to evolve

Evidence
Peer-reviewed
Geography
100 metropolitan areas, United States
System
Urban landscapes and plant–pollinator metacommunities

WHAT THE EVIDENCE SAYS

Across 100 U.S. metropolitan regions, urban landscapes had lower heterogeneity and forest aggregation and higher aggregation of developed land than non-urban landscapes. A proof-of-concept spatial eco-evolutionary plant–pollinator model then showed that heterogeneity and connectivity can delay extinction, but trait evolution and mutualistic feedbacks change the size of those benefits.

WHY IT MATTERS / OUR READ

Green corridors and habitat networks are not static plumbing. If species interactions and traits change in fragmented urban landscapes, design performance may depend on how connectivity shapes both movement and adaptation over time.

CAVEATS / UNCERTAINTY

The empirical landscape analysis does not measure observed extinction outcomes, and the eco-evolutionary result comes from a proof-of-concept model rather than a post-occupancy design experiment. The 100-city U.S. sample may not generalize to other urban forms.

SOURCE

Landscape Ecology
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A 100-city landscape analysis paired with a plant–pollinator model suggests that heterogeneity and connectivity can delay extinction, while evolutionary feedbacks can erode some of that benefit.

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Peer-reviewed Africa

Intensive cropland is showing up as a connectivity barrier for Guinea baboons

Evidence
Peer-reviewed
Geography
West Africa; Guinea baboon range
System
Savanna, forest–agriculture mosaics and riverine corridors

WHAT THE EVIDENCE SAYS

Researchers genotyped 243 non-invasively collected fecal samples across the Guinea baboon range. Genetic diversity was positively associated with shrublands and forest–savanna mosaics; rivers, grasslands and shrublands were associated with functional connectivity, while intensive cropland and large water bodies acted as stronger resistance. Forest–cropland mosaics were more permeable than strict monocultures.

WHY IT MATTERS / OUR READ

The useful conservation unit is the landscape matrix, not simply the amount of habitat left. In a species able to use human-modified landscapes, heterogeneous working lands and riverine corridors may retain connectivity that intensive monocultures do not.

CAVEATS / UNCERTAINTY

Landscape-genetic resistance models infer potential connectivity rather than observing contemporary dispersal directly. Genetic structure also integrates historical demography and past landscapes, and the diversity–environment analysis had limited power across only ten geographic demes; the study does not prove that converting an individual farm to agroforestry will restore gene flow.

SOURCE

Heredity
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Range-wide landscape genetics found heterogeneous savanna–forest mosaics and river systems more permeable than intensive agriculture, with the Gambian populations carrying the lowest diversity and highest inbreeding.

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Peer-reviewed

Change the map scale and Hangzhou Bay’s ecological trend changes with it

Evidence
Peer-reviewed
Geography
Hangzhou Bay Urban Agglomeration, China
System
Urban / coastal metropolitan landscape

WHAT THE EVIDENCE SAYS

A Google Earth Engine analysis tracked a remote-sensing ecological index from 2000–2024 at 1-, 3-, 5- and 10-km grids and county scale. The regional RSEI increased by about 0.0423 overall, but the share classified as improving rose from 75.34% at 1 km to 84.25% at county scale, demonstrating how aggregation can hide opposing local trajectories. Land-use intensity was the strongest SHAP contributor in the explanatory model.

WHY IT MATTERS / OUR READ

For metropolitan ecological planning, scale is part of the result. County or city averages can be useful for screening, but site and corridor decisions need nested spatial analysis so local degradation is not erased by improvement elsewhere.

CAVEATS / UNCERTAINTY

RSEI combines greenness, wetness, dryness and surface temperature; it is not a direct biodiversity or ecosystem-integrity measure. The study is observational and cannot assign causal effects to land use or policy, and its machine-learning validation was not designed as a strict spatial or temporal holdout test.

SOURCE

Frontiers in Ecology and Evolution
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A 25-year remote-sensing analysis found coarse administrative units made improvement look more widespread while hiding local opposing trends along urban corridors and the bay.

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Peer-reviewed Latin America & Caribbean

Eucalyptus cover filtered bat communities toward fewer functional roles in Brazil’s Atlantic Forest

Evidence
Peer-reviewed
Geography
Minas Gerais, Brazil
System
Atlantic Forest fragments in agricultural / plantation matrix

WHAT THE EVIDENCE SAYS

Mist-net and acoustic surveys detected 34 species/sonotypes. Across a 0–68% Eucalyptus-cover gradient, predicted functional richness and dissimilarity fell while functional redundancy rose; unique larger-bodied and diverse dietary guilds were less associated with Eucalyptus-dominated landscapes.

WHY IT MATTERS / OUR READ

Species counts alone can miss functional homogenization in production landscapes. Plantation extent and landscape composition may matter even when bats remain present.

CAVEATS / UNCERTAINTY

The study is observational across 12 fragments in one heavily altered landscape, so it cannot isolate plantation cover from every correlated land-use process or establish a universal plantation threshold.

SOURCE

Biodiversity and Conservation
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Across 12 forest fragments, Eucalyptus cover was the strongest landscape predictor of bat functional structure.

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