Comparative analysis of nutrient concentrations in generalist and specialist tree species and soils, Manaus, Brazil

Author(s): Gimenez B; Bomfim B; Camelo S; Oliveira R; Chambers J; Higuchi N; Lima A

Site ID: BR-Ma2

Site Name: Manaus - ZF2 K34

Variables: Leaf chemistry; Other; Soil chemical composition; Soil types (or soil order); Wood density

Date Range: Oct. 11, 2022 - Oct. 20, 2022

Description: This dataset was collected near Manaus, Brazil, at ZF-2 site, inside the North-South transect plots from 20221011 to 20221020. Measurements were made on specialists and generalist tree species along topographic gradient (in upland high-clay content soils of plateaus and high sandy content and partially flooded soils of valleys). We selected nine species (with four replicates each, totaling 35 individuals) occurring in different topographic positions: three plateau specialists, three valley specialists, and three generalists, where leaf and trunk samples were collected from each individual, and soil samples for carbon and nutrient analysis and quantification. Three soil pits were opened around each sample tree, about one meter apart (total of 105 soil pits each 60-cm deep), where soil samples were collected at four depths: 0-5, 5-10, 10-30 and 30-50 cm. In each of the three pits around each tree, one single sample was taken at each depth and combined to obtain a composite sample per depth per individual tree (35 trees × 4 depths = 140 soil samples). The files “Plant_Nutrient_Concentrations_NS_Transect_Manaus.csv” and “Soil_Nutrient_Concentrations_NS_Transect_Manaus.csv” contain the nutrient concentration data from plant and soil material, respectively. Additionally, the file “Sample_Info.csv” contains details about each variable including units and data type. The file “Species_Info.csv” includes information about each sampled individual, such as species, family, diameter at the breast height (DBH), and more. The dataset is ready to be used in any programming language like python or R.

QA/QC: Provisional QA-QC

Methods Description: This dataset was collected near Manaus, Brazil, at ZF-2 site, within the North-South transect plots from 20221011 to 20221020. We selected nine species occurring in different topographic positions: three plateau specialists, three valley specialists, and three generalists, where leaf and trunk samples were collected from each individual, and soil samples for carbon and nutrient analysis and quantification. Three soil pits were dug around each sample tree, about one meter apart (a total of 105 soil pits, each 60-cm deep), where soil samples were collected at four depths: 0-5, 5-10, 10-30 and 30-50 cm. In each of the three pits around each tree, one single sample was taken at each depth and combined to obtain a composite sample per depth per individual tree (35 trees × 4 depths = 140 soil samples). These samples were collected to quantify soil nutrient and carbon stocks around each sample tree. The determination of carbon and nutrients in the plant organs (leaf and stem) followed the methodology used by EMBRAPA. Carbon (C) was obtained using the Walkley-Black method, nitrogen (N) using the Kjeldahl method, phosphorus (P) using the molybdenum blue spectrophotometry method and potassium (K), calcium (Ca) and magnesium (Mg) using atomic absorption spectrometry. For K a potassium hollow cathode lamp is used and for Ca and Mg a calcium-magnesium or individual arc discharge (or hollow cathode) lamp was used. The addition of lanthanum or strontium was necessary for the determination of Ca and Mg to prevent interference caused by the presence of phosphates and aluminum.

Access Level: Public

Originating Institution(s): Instituto Nacional de Pesquisas da Amazônia (INPA); Embrapa Amazonia Ocidental; University of California - Berkeley

Sponsor Organization(s): None

Contact: Gimenez, Bruno - National Institute of Amazon Research (INPA) (bruno.oliva.gimenez@gmail.com)

Version: 1.0

Dataset Citation: Gimenez B; Bomfim B; Camelo S; Oliveira R; Chambers J; Higuchi N; Lima A (2024): Comparative analysis of nutrient concentrations in generalist and specialist tree species and soils, Manaus, Brazil. 1.0. NGEE Tropics Data Collection. (dataset). https://doi.org/10.15486/ngt/2377278

Acknowledgement: Funding for NGEE-Tropics data resources was provided by the U.S. Department of Energy Office of Science, Office of Biological and Environmental Research.

Data Link: Download Dataset

This dataset is part of the paper "Comparative analysis of nutrient concentrations in generalist and specialist tree species across diverse soil types in the Amazon Forest" by Sarah Camelo et al., under review in Plant and Soil.