In Kakamega Forest, the season changed the butterfly community more than the habitat label did
WHAT THE EVIDENCE SAYS
Weekly surveys from January through June 2024 recorded 10,334 butterflies representing 146 species across six cover types. Abundance, richness and Shannon diversity rose in the wet season, community composition separated by season, and one-month-lagged rainfall was the strongest abundance predictor. Natural and secondary forest still supported the highest abundance and diversity, but season explained more overall community variation than habitat type.
WHY IT MATTERS / OUR READ
Biodiversity monitoring can misread habitat differences when sampling windows do not span seasonal transitions. For tropical insects especially, timing is part of the survey design—not background noise.
CAVEATS / UNCERTAINTY
This is one six-month study in one rainforest fragment. It does not establish a long-term climate trend, and seasonal dominance in this system should not be generalized to other taxa, years or tropical forests.
SOURCE
Journal of Tropical Ecology
View original evidence ↗
Six months of weekly surveys across six forest-cover types found wet–dry transitions explaining more community variation than habitat type, with lagged rainfall the strongest abundance predictor.
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