Fig. 2: Temporal response of leaf litterfall to nutrient additions in Budongo Forest Reserve, Uganda. | Nature Geoscience

Fig. 2: Temporal response of leaf litterfall to nutrient additions in Budongo Forest Reserve, Uganda.

From: Response of tropical forest productivity to seasonal drought mediated by potassium and phosphorus availability

Fig. 2

a–c, Bi-weekly leaf litter production (mean ± SEM, n = 16 plots) measured from May 2018 to April 2021, pooled for plots with or without nitrogen (+N vs −N; a), phosphorus (+P vs −P; b) and potassium (+K vs −K; c). c, The four-week delayed peak of leaf litterfall in +K treatments during the first year’s prolonged dry season and lower leaf litterfall during the dry seasons of the three years compared to −K treatments (K × season interactions; F1,48 = 4.49, P = 0.039). d, Bi-weekly rainfall corresponding to litter collection dates. Grey shades represent the dry season (≤100 mm rainfall per month), and vertical dashed lines indicate dates of fertilization.

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