CO2 Supersaturation in Low-Latitude Lakes

The work presented on this page brings together results of several projects conducted by the Limnology Laboratory and the Aquatic Ecology Working Group of the Universidade Federal do Rio Grande do Norte (Natal-RN, Brazil).

Contacts:

1. André M. Amado - corresponding author andre.amado@gmail.com
2. Adriano Caliman - project coordinator caliman21@gmail.com
3. Pedro C. Junger - first author and responsible for this repo pedro.junger@gmail.com

When using the data available in this repository, please cite the original publication and the dataset.

About this manuscript:

The role of tropical lakes and reservoirs in the global carbon cycle has received increasing attention in the past decade, but our understanding of their variability is still limited. The metabolism of tropical systems may differ profoundly from temperate systems due to the higher temperatures and wider variations in precipitation. Here, we investigated the spatial and temporal patterns of the variability in the partial pressure of carbon dioxide (pCO2) and its drivers in a set of 102 low-latitude lakes and reservoirs that encompass wide gradients of precipitation, productivity and landscape properties (lake area, perimeter-to-area ratio, catchment size, catchment area-to-lake area ratio, and types of catchment land use). We used multiple regressions and structural equation modeling (SEM) to determine the direct and indirect effects of the main in-lake variables and landscape properties on the water pCO2 variance.

This repo includes:

This repo contains the R scripts and raw data used to run the analysis and figures presented in the manuscript "Effects of Seasonality, Trophic State and Landscape Properties on CO2 saturation in Low-Latitude Lakes and Reservoirs" published online in the journal Science of the Total Environment (https://doi.org/10.1016/j.scitotenv.2019.01.273):

Scripts:

• script_figs_stats.R: codes used to create the figures and run the analysis conducted throughout the main text of the manuscript
• script_suppl_mat.R: codes used to create the figures and run the analysis used in the supplementary material of the manuscript

Raw datasets:

• spatial_dataset.csv: raw spatial dataset used in this manuscript
• seasonal_dataset.csv: raw seasonal dataset used in this manucript
• mean_data.csv: mean values of the seasonal dataset used in the supplementary material of this manuscript
• surf_bottom_sup_mat.csv: surface and bottom seasonal pCO2 values from Gargalheiras and Cruzeta reservoirs used in the supplementary material of this manuscript