Datasets and R code for Hwang, B. et al. (2024)<i>The impact of insect herbivory on biogeochemical cycling in broadleaved forests varies with temperature</i>

We established a global network of 74 plots within 40 mature, undisturbed broadleaved forests located across tropical, temperate, and boreal zones to investigate the impact and drivers of insect herbivory on element cycling. Using standardized methods, we analyzed freshly senesced and green leaves from these plots to estimate foliar production and herbivory, carbon, nitrogen, phosphorus and silica concentrations, and stand-level nutrient fluxes as deposited by insect herbivores. We then compared insect-mediated element fluxes to other sources of labile nutrients such as atmospheric deposition and bedrock weathering. We also investigated potential abiotic (mean annual temperature, evapotranspiration : mean annual precipitation, soil nutrient concentrations) and biotic (foliar biomass production, leaf-level herbivory, foliar nutrient concentrations) as potential drivers of these fluxes. All annual data by litter trap (herblat.xls), by plot means (herblatmeans.xls), and code for analysis (herblatcode.R) found in this folder were used for the following manuscript:Hwang, B. et al. (2024) The impact of insect herbivory on biogeochemical cycling in broadleaved forests varies with temperature. Nature Communications, <i>Accepted</i>.我们在热带、温带与寒带的40片成熟未受干扰的阔叶林中建立了包含74个样地的全球样地网络，以探究昆虫植食作用（insect herbivory）对元素循环的影响及其驱动因子。本研究采用标准化方法，对上述样地内的新鲜衰老叶片与鲜绿叶片开展分析，以估算叶片生产量、昆虫植食作用程度、碳、氮、磷及硅的浓度，以及昆虫植食者介导的林分尺度养分通量。随后，我们将昆虫介导的元素通量与大气沉降、基岩风化等其他活性养分来源进行了对比。此外，我们还探究了潜在的非生物因子（年平均温度、蒸散量与年降水量的比值、土壤养分浓度）与生物因子（叶片生物量生产量、叶片尺度植食作用、叶片养分浓度）作为这些通量驱动因子的可能性。本文件夹中收录的所有基于凋落物收集器（litter trap）的年度数据（herblat.xls）、样地均值数据（herblatmeans.xls）以及分析代码（herblatcode.R），均用于以下论文：Hwang, B. 等（2024）《昆虫植食作用对阔叶林生物地球化学循环的影响随温度变化》，《自然-通讯（Nature Communications）》，已接收。