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Impacts of Climate Change on Blue Carbon Stocks and Fluxes in Mangrove Forests
| Content Provider | MDPI |
|---|---|
| Author | Alongi, Daniel Michael |
| Copyright Year | 2022 |
| Description | Mangroves store blue carbon (693 Mg $C_{ORG}$ $ha^{−1}$) disproportionate to their small area, mainly (74%) in deep soil horizons. Global stock estimates for mangroves (5.23–8.63 Pg $C_{ORG}$) are equivalent to 15–24% of those in the tropical coastal ocean. Carbon burial in mangrove soils averages 184 g $C_{ORG}$ $m^{−2}$ $a^{−1}$ with global estimates (9.6–15.8 Tg $C_{ORG}$ $a^{−1}$) reflecting their importance in carbon sequestration. Extreme weather events result in carbon stock losses and declines in carbon cycling and export. Increased frequency and ferocity of storms result in increasingly negative responses with increasing strength. Increasing temperatures result in increases in carbon stocks and cycling up to a critical threshold, while positive/negative responses will likely result from increases/decreases in rainfall. Forest responses to sea-level rise (SLR) and rising $CO_{2}$ are species- and site-specific and complex due to interactive effects with other drivers (e.g., temperature, salinity). The SLR critical threshold is ≈ 6 mm $a^{−1}$ indicating survival only under very low-low $CO_{2}$ emissions scenarios. Under low coastal squeeze, landward migration could result in sequestration and $CO_{2}$ losses of 1.5 and −1.1 Pg C with net stock gains and losses (−0.3 to +0.5 Pg C) and $CO_{2}$ losses (−3.4 Pg) under high coastal squeeze. |
| Starting Page | 149 |
| e-ISSN | 19994907 |
| DOI | 10.3390/f13020149 |
| Journal | Forests |
| Issue Number | 2 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-19 |
| Access Restriction | Open |
| Subject Keyword | Forests Blue Carbon Carbon Co2 Climate Change Mangrove Sea-level Rise Sequestration |
| Content Type | Text |
| Resource Type | Article |
