Context Accurate estimates of forest seed production are central for a wide range of ecological studies. As reference methods such as litter traps (LT) are cost- and time-consuming, there is a need of fast, reliable, and low-cost tools to quantify this variable in the field.
Aims To test two indirect methods, which consist of counting the seeds fallen in quadrats.
Methods The trial was performed in three broadleaved (beech, chestnut, and Turkey oak) tree species. Seeds are either manually counted in quadrats placed at the ground (GQ) or from images acquired in the same quadrats (IQ) and then compared against LT measurements.
Conclusion Quadrat counting is a powerful tool to estimate forest seed production. We recommend using quadrats and LT to cross-calibrate the two methods in case of estimating seed biomass. Quadrats could then be used more routinely on account of their faster and simpler procedure to obtain measurements at more spatially extensive scales.
Mast seeding; Acorns; Nuts; Masting; Litter trap
Tattoni, C., Chianucci, F., Ciolli, M. et al. A comparison of ground-based count methods for quantifying seed production in temperate broadleaved tree species. Annals of Forest Science 78, 11 (2021). https://doi.org/10.1007/s13595-020-01018-z
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The dataset generated during the current study is available on Mendeley repository: https://data.mendeley.com/datasets/cc6m499bmm