首页|Soil inoculation changed soil microbial communities,but did not accelerate the decomposition of European Beachgrass (Ammophila arenaria) in Point Reyes National Seashore

Soil inoculation changed soil microbial communities,but did not accelerate the decomposition of European Beachgrass (Ammophila arenaria) in Point Reyes National Seashore

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  • NSTL
  • Wiley
Legacy effects after the removal of invasive plants present significant challenges to restoration. The pivotal role of soilmicrobial communities in shaping these legacy effects is increasingly recognized, yet there is a lack of effectivemethods to mitigate alteredmicrobial communities. In Point Reyes National Seashore (California), although the invaded European beachgrass (Ammophila arenaria [L.] Link) was successfully controlled by herbicide treatment, beachgrass litter remained undecomposed for over 5 years, leaving pronounced legacy effects on soil organic matter and microbial community composition. We hypothesized that soil inoculation from uninvaded dune scrub can accelerate the decomposition of beachgrass litter in herbicide-treated sites by restoring the soil microbial communities and the abundance ofmicrobial decomposers. Three litterbags containing European beachgrass litter or litter from two common shrubs at dune scrub were deployed into each plot to assess the impact of soil inoculation on litter decomposition rates.Our results revealed that soil inoculation, regardless of the inoculation level, did not accelerate the decomposition of European beachgrass. Only the decomposition of bush lupine litter, which had the highest litter quality among three types of litter, was accelerated at the highest inoculation level (approximately 11,880 g/m~2). Additionally, soil inoculation increased the richness and compositional homogeneity of soil microbial communities, along with the relative abundances of wood saprotrophic fungi, soil saprotrophic fungi, and lichenized fungi. Although these findings demonstrate the potential of soil inoculation, the cost-effectiveness of soil inoculation limits its feasibility in accelerating the delayed decomposition of European beachgrass litter in Point Reyes.

coastal dunedecompositionlegacy effectsmicrobialsaprotrophssoil translocation

Ben Yang、Michael K. Spaeth、Lorraine S. Parsons、Albert Barberan

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Department of Environmental Science, University of Arizona, Tucson, AZ 85721,U.S.A.

School of Natural Resources and Environment, University of Arizona, Tucson, AZ 85721, U.S.A.

Point Reyes National Seashore, National Park Service, Berkeley, CA 94956, U.S.A.

2025

10.1111/rec.14344

Restoration ecology

Restoration ecology

ISSN：1061-2971
年,卷(期)：2025.33(3)
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