Methane emissions in a subtropical mangrove forest (Ishikaki Island, Japan)

The data set provides CH4 flux from buttress roots and stems of individuals of Bruguiera gymnorrhiza of different sizes in Ishigaki Island, Japan. It also provides CH4 flux from trees and sediments over a 24-hour cycle., , Any program that can read .csv files, # Data used in: Variability in methane emissions from stems and buttress roots of Bruguiera gymnorrhiza trees in a subtropical mangrove forest

Daniel Epron, Takumi Mochidome, A.T.M. Zinnatul Bassar, Rempei Suwa

CH4 fluxes were measured using a cavity-enhanced absorption spectroscopy gas analyser (Li 7810, Li-Cor; Lincoln, USA) with two 6 mm diameter 2 m long PTFE tubes.

Changes in the CH4 and CO2 concentrations in the stem chamber were recorded for 4 min at a frequency of 1 Hz.
For buttress roots and stem, a polypropylene chamber bases were affixed to the bark surface with neutral seal putty, covering an area of 45 cm2.

The stem chambers were closed by affixing a polypropylene lid lined with a silicone rubber gasket.
For sediment, a circular chamber made of clear acrylic resin (diameter, 32 cm; height, 14.6 cm) was affixed to PVC collars inserted 10 cm into the sediment.

The slopes of the linear variations in CH4 concentration in the chambers over time were used to calculate CH4 em...