Fine root production in a chronosequence of mature reforested mangroves
| Type | Article | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | 2021-11 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Arnaud Marie1, 2, 3, Morris Paul J.2, Baird Andy J.2, Dang Huyen4, Nguyen Tai Tue5 | ||||||||||||
| Affiliation(s) | 1 : IFREMER, Laboratoire Environnement et Ressources des Pertuis Charentais (LER‐PC) La Tremblade BP133, France 2 : School of Geography University of Leeds Leeds LS2 9JT, UK 3 : School of Geography, Earth and Environmental Sciences University of Birmingham Edgbaston Birmingham B15 2TT ,UK 4 : Faculty of Geology and Petroleum Engineering Ho Chí Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet St., Dist. 10 Ho Chí Minh ,Vietnam 5 : VNU‐University of Science, ‐ 334 Nguyen Trai Thanh Xuan Hanoi, Vietnam |
||||||||||||
| Source | New Phytologist (0028-646X) (Wiley), 2021-11 , Vol. 232 , N. 4 , P. 1591-1602 | ||||||||||||
| DOI | 10.1111/nph.17480 | ||||||||||||
| WOS© Times Cited | 19 | ||||||||||||
| Keyword(s) | belowground carbon, blue carbon, coastal wetland, EnRoot minirhizotron, fine root production, reforestation, restoration, root trait | ||||||||||||
| Abstract | Mangroves are among the world’s most carbon-dense ecosystems, but have suffered extensive deforestation, prompting reforestation projects. The effects of mangrove reforestation on belowground carbon dynamics are poorly understood. In particular, we do not know how fine root production develops following mangrove reforestation, despite fine root production being a major carbon sink and an important control of mangrove soil accretion. Using minirhizotrons, we investigated fine root production and its depth-variation along a chronosequence of mature Vietnamese mangroves. Our results show that fine root production decreases strongly with stand age in the uppermost 32 cm of our soil profiles. In younger mangrove stands, fine root production declines with depth, possibly due to a vertical gradient in soil nutrient availability; while root production in the oldest stand is low at all depths and exhibits no clear vertical pattern. A major fraction of fine root production occurs deeper than 30 cm, depths that are commonly omitted from calculations of mangrove carbon budgets. Younger mangroves may accrue shallow soil organic matter faster than oldermangroves. Therefore, root productivity and forest stand age should be accounted for when forecasting mangrove carbon budgets and resistance to sea level rise. |
||||||||||||
| Full Text |
|