Additional file 1 of Linkages among leaf nutrient concentration, resorption efficiency, litter decomposition and their stoichiometry to canopy nitrogen addition and understory removal in subtropical plantation
Creators: name: Shah, Jawad Ali
name: Liu, Wenfei
name: Ullah, Saif
name: Duan, Honglang
name: Shen, Fangfang
name: Liao, Yingchun
name: Huang, Guomin
name: Wu, Jianping
Publisher: name: figshare
Year: 2024
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. A schematic diagram showing various leaf nutrient resorption control strategies under different nutrient limitation scenarios and litter decomposition processes in response to canopy nitrogen (CN) addition and understory ermoval (UR) in Cunninghamia lanceolata plantation. In the uppermost panel, (a) nutrient concentration control, the role of foliar nutrients in influencing resorption patterns is depicted. In the middle panel, (b) nutrient limitation control, certain nutrient restriction has the potential to influence resorption patterns. (c) stoichiometry control, this panel emphasizes the role of foliar N:P ratios in determining how much N versus P are resorbed during senescence. The CN addition follows the nutrient concentration control whereas UR follows the nutrient limitation control. The stoichiometric control is proposed for various relationships of leaf nutrient contents, nutrient resorption and litter decomposition. The CN addition accelerates litter decomposition process by boosting substrate availability for soil biota which in turn results in higher litter nutrient release in soil ecosystem. By contrast UR slows down the process of litter decomposition by decreasing the availability of substrate for soil biota and hence results in slow nutrient release into the soil ecosystem. Figure S2. Relationships between resorption efficiencies of N and P with leaf and litter nutrient contents in Chinese fir plantations. Figure S3. Relationships between N and P concentrations in green leaves ([N]g and [P]g), senesced leaves ([N]s and [P]s), with litter nutrient contents in Chinese fir plantations. Table S1. Results of two-way ANOVAs for leaf nutrient concentrations, leaf N:P ratio, and nutrient resorption parameters sampled in April, as dependent on canopy nitrogen addition (CN), understory removal (UR), and their interaction (CN × UR). Table S2. Results of two-way ANOVAs for leaf nutrient concentrations, leaf N:P ratio, and nutrient resorption parameters sampled in December, as depended on canopy nitrogen addition (CN), understory removal (UR), and their interaction (CN × UR). Table S3. Results of four-way ANOVAs showing the effects of canopy nitrogen addition (CN), understory removal (UR), leaf types {(LT) (Green vs Senesced)}, seasons {(S) (April and December)} and their interactions on N, P concentrations and N:P ratios in a Chinese fir plantation. Table S4. Effects of canopy nitrogen addition (CN), understory removal (UR), season {S (April and December)} and their interactions on leaf nutrient resorption parameters (NRE, and PRE) in a Chinese fir plantation. Table S5. Results of repeated measures ANOVA showing the effects of canopy nitrogen addition (CN), understory removal (UR), sampling dates (T), and their interactions on leaf litter nutrient content of N, P and N:P during 2016–2017.