Forest mammals sort themselves by height, slope, and soil type
Gorczynski D, Alempijevic D, Amboko J, Fournier C, Balimu M
Urban Ecology
The same layered complexity that makes a Congo rainforest tick exists in any mature woodland or food forest you tend: creatures, fungi, and plants each occupy distinct vertical niches, and managing only what you see at eye level means missing most of what's actually happening.
Researchers set up camera traps at three heights in Congo rainforests, from the ground all the way up into the canopy, to see how mammals use different levels of the forest. When they looked at all three layers together, they discovered that even gentle slopes and small changes in elevation influenced which animals lived where, probably because the soil and plant life change across those gradients. Studying just the ground gave a misleading picture of the whole community.
Key Findings
Camera traps deployed at three strata (canopy, understory-midstory, ground) revealed a significant positive effect of elevation on mammal occupancy that was invisible when only ground-level data were used.
A multispecies, multi-scale occupancy model showed that vertical sampling fundamentally altered inferred relationships between mammal communities and environmental gradients.
Even small elevation gradients in lowland tropical forests shaped mammal diversity, likely through soil-mediated effects on habitat structure and resource availability.
chevron_right Technical Summary
Scientists deployed cameras at ground, mid-forest, and canopy levels across the Congo Basin and found that studying only the forest floor misses key patterns in how mammals use their habitat. Even small elevation changes shaped which species lived where, but this only became clear when all three vertical layers were analyzed together.
Abstract Preview
Original paper
Ground-to-canopy monitoring reveals hidden ecological patterns in Congo Basin mammals.
Vertical stratification has long been recognized as a key dimension of biodiversity in structurally complex ecosystems, shaping animal movement and community structure. Camera traps provide a power...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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