Remove vegetation that could compete with planted non-woody plants: brackish/saline wetlands
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Overall effectiveness category Unknown effectiveness (limited evidence)
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Number of studies: 1
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Supporting evidence from individual studies
A replicated, randomized, paired, controlled study in 2006 in an estuarine salt marsh in California, USA (Varty & Zedler 2008) found that thinning dominant pickleweed Salicornia virginica before sowing/planting dwarf saltwort Salicornia bigelovii did not significantly affect the density of saltwort seedlings, but did increase survival of planted saltwort. Two months after sowing/planting, the total density of saltwort seedlings did not significantly differ between thinned and unthinned plots (data not reported). However, after six months, the survival rate of planted saltwort seedlings was 2.4 times greater in thinned than unthinned plots (further data not reported). Methods: In March 2006, dwarf saltwort was planted and sown into seventy-two 0.25-m2 plots (three sets of 24) on a pickleweed-dominated salt marsh. Four seedlings and 1.25 ml of seed were added to each plot. In 36 plots (12 random plots/set), pickleweed had been thinned (stems cut and removed) to leave roughly 50% cover. The other plots were left unthinned (>75% pickleweed cover). Pickleweed cover remained lower in thinned than unthinned plots throughout the growing season. Half of the plots had also been lowered slightly (5–10 cm). Vegetation was surveyed between May and September 2006.
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This Action forms part of the Action Synopsis:
Marsh and Swamp ConservationMarsh and Swamp Conservation - Published 2021
Marsh and Swamp Synopsis