Warming stimulates mangrove carbon sequestration in rising sea-level at their northern limit: an in situ simulation

Global warming and sea-level rise are directly influencing the growth, distribution, and greenhouse gas emissions of mangrove forests. However, mangrove forests growing at their latitudinal limits are relatively susceptible to warming; nevertheless, few studies have focused on GHG emissions of latitudinal limits mangrove forests as related to global climate change. To address this knowledge gap, a multi-year in situ control experiment was established in a restored plantation at the northern distribution limit of Kandelia obovata, the most cold-tolerant mangrove species in China, to simulate both warming and sea-level rise. We investigated the growth patterns and sediment greenhouse gas emissions of a K. obovata population and identified the primary factors contributing to these changes. The results showed that warming and moderate sea-level rise enhanced biomass by more than 18%, indicating that warming stimulated plant growth while excessive sea-level rise inhibited it. The sediment gr..., Greenhouse gases sampling, flux measurements, and global warming potential analysis
In this experiment, sediment greenhouse gases were collected using a Closed Static Chamber. The chamber covered 0.013 m2 of sediment surface with a headspace volume of 4.5 liters. The chamber was placed on the sediment surface with the edge inserted 2 cm into the sediment; the round hole channel at the top was plugged with a soft rubber plug, and a syringe needle was inserted into the rubber plug to maintain the air pressure balance inside and outside the chamber. The pressure was controlled in the chambers with a small vent on the chamber top. Chambers were sampled between 09:00 and 15:00 h after 2 h of an ebb tide. Air temperature (Ta) and sediment surface temperature at a depth of 0–5 cm (Ts) inside chambers at the beginning and end of the gas sampling process were measured using a HOBO MX2202 air temperature sensor and a sediment thermometer. For each gas sample, a 0.5# needle was connected to a 60 m..., , # Warming stimulates mangrove carbon sequestration in rising sea-level at their northern limit: an in situ simulation in China

[https://doi.org/10.5061/dryad.bnzs7h4hd](https://doi.org/10.5061/dryad.bnzs7h4hd)

## Description of the data and file structure

Sheet 1 is the legend of the dataset, explaining all the abbreviations and units in this dataset.
Data showed in different sheets matching with different figures.

## Code/Software

Data analysis by using R verson 4. 1 .3, detail infromation could avaliable from article.

**Fig. 1.** Location of study site (a, b), open-top chambers setup (c), field images at before and last sampling time (d, e), and air temperature differences between control and warming plots in 1st and 3rd years (f, g).

**Fig. 2.** The response of height and basal diameter of Kandelia obovata to warming in low-tidal zone (a–f), medium-tidal zone (g–l), and high-tidal zone (m–r), respectively.

**Fig. 3.** The response of sediment CO2 (a, b), CH4 (c, d), and N2O (...,