Planting out the Lazarus Fern Babies

Seattle Parks/GSP plant ecologist Michael Yadrick found funds to hire Signature Landscape Services of Redmond Washington to do more restoration in Seward’s old-growth forest. Last year, Signature did lots of planting, and subsequent irrigation in several acres of sword fern die-off near the cisterns, at the intersection of the sqebeqsed and Hatchery trails. The crew, led by Hamilton, is skilled, industrious, committed to the forest, and a pleasure to deal with.

This year, with yet more support from Michael, Signature installed about 200 young sword ferns in depleted areas on either side of the sqebeqsed trail. Half of these young ferns are the offspring of the Lazarus Fern, so-called because it was one of the few survivors of the initial die-off at Ground Zero – and unlike most of the other survivors, is located at a distance from large trees or downed wood. Volunteer David Perasso collected spores from the Lazarus Fern, grew them out in flats, then transferred them to the Parks nursery/greenhouse (thank you Johan!).

Michael, Johan, Eric Sterner and FoSP designed a simple experiment on the hypothesis that these Lazarus offspring may have an allele protective against the (still unknown) agent of the die-off, and therefore will have better survival than generic nursery ferns planted nearby. Hamilton and the Signature crew platned the Lazarus ferns and the generic controls into the latest dramatic die-off zone, described here. FoSP will monitor survival over the next five years. Many confounding factors muddy the picture, but perhaps some useful pattern will emerge.

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