Morrow's honeysuckle (Lonicera morrowii) was dropping ripe fruit and shedding…

June 25, 2026Pittsburgh Low Plateau

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(Lonicera morrowii) was dropping ripe fruit and shedding leaves in late June while native spicebush still held its full summer canopy — a telling window. The honeysuckle ripens just as migrants and residents seek seeds, making it an efficient vector for its own spread across the landscape. But the timing reveals a deeper problem: it leafs out weeks before its native competitors in spring, shading out wildflowers and forbs before they can gain light.

This single invader is part of a much larger pattern. Over 30 introduced species were recorded here this season, each competing for space and light according to its own calendar, each disrupting the synchronized rhythms that native plants and animals have evolved together. The ecosystem we see now is no longer the one the old maples and oaks were built for.

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