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Ecological Intelligence

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Ecological Intelligence / Subject

Rwanda

Peer-reviewed Africa

Rwanda's worst erosion hotspots combined bare ground and steep slopes

Evidence
Peer-reviewed
Geography
Akanyaru catchment, Rwanda
System
Agricultural watershed erosion

WHAT THE EVIDENCE SAYS

GIS/RUSLE modelling across 3,402 square kilometres estimated annual soil loss from near zero to 51.4 tonnes per hectare, with higher modelled losses on steep degraded and intensively farmed slopes.

WHY IT MATTERS / OUR READ

Spatial risk surfaces can prioritize consultations and erosion-control reconnaissance rather than assign uniform prescriptions to an entire catchment.

CAVEATS / UNCERTAINTY

RUSLE produces modeled hillslope detachment, not field-measured sediment delivered to wetlands; conservative support-practice assumptions affect estimates.

SOURCE

Discover Soil — Ntirenganya et al. (2026)
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Catchment modelling can focus field verification and conservation investment.

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Peer-reviewed Africa

In western Rwanda, connected tree cover was not the same as connected biodiversity

Evidence
Peer-reviewed
Geography
Western Province, Rwanda
System
Afromontane forest mosaic; home gardens; agroforestry

WHAT THE EVIDENCE SAYS

Researchers used Omniscape circuit-theory connectivity surfaces for trees and home gardens and compared them with woody-plant and bird richness and diversity at 91 field sites. Connectivity dominated by exotic plantations was negatively associated with these biodiversity measures; home-garden connectivity was positively associated. The analysis supports gardens as complementary stepping stones.

WHY IT MATTERS / OUR READ

Counting additional trees can be a poor proxy for habitat that animals actually use. Landscape restoration should distinguish native-forest protection, planted-canopy extent and biodiversity-supporting matrix habitat.

CAVEATS / UNCERTAINTY

These are observational associations in one Rwandan region, not proof that creating any home garden will cause equivalent biodiversity gains. Gardens do not replace primary native forest or the habitat requirements of forest specialists.

SOURCE

Landscape Ecology — primary field and connectivity study
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Bird and woody-plant surveys at 91 sites favored connected traditional home gardens over connectivity dominated by exotic tree plantations.

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