Carbon budgets for Caribbean mangrove forests of varying structure and with phosphorus enrichment

Lovelock, Catherine E., Simpson, Lorae T., Duckett, Lisa J. and Feller, Ilka C. (2015) Carbon budgets for Caribbean mangrove forests of varying structure and with phosphorus enrichment. Forests, 6 10: 3528-3546. doi:10.3390/f6103528

Author Lovelock, Catherine E.
Simpson, Lorae T.
Duckett, Lisa J.
Feller, Ilka C.
Title Carbon budgets for Caribbean mangrove forests of varying structure and with phosphorus enrichment
Journal name Forests   Check publisher's open access policy
ISSN 1999-4907
Publication date 2015-10-01
Year available 2015
Sub-type Article (original research)
DOI 10.3390/f6103528
Open Access Status DOI
Volume 6
Issue 10
Start page 3528
End page 3546
Total pages 19
Place of publication Basel, Switzerland
Publisher MDPI AG
Language eng
Abstract There are few detailed carbon (C) budgets of mangrove forests, yet these are important for understanding C sequestration in mangrove forests, how they support the productivity of the coast and their vulnerability to environmental change. Here, we develop C budgets for mangroves on the islands of Twin Cays, Belize. We consider seaward fringing forests and interior scrub forests that have been fertilized with phosphorus (P), which severely limits growth of trees in the scrub forests. We found that respiration of the aboveground biomass accounted for 60%–80% of the fixed C and that respiration of the canopy and aboveground roots were important components of respiration. Soil respiration accounted for only 7%–11% of total gross primary production (GPP) while burial of C in soils was ~4% of GPP. Respiration by roots can account for the majority of soil respiration in fringing forests, while microbial processes may account 80% of respiration in scrub forests. Fertilization of scrub forests with P enhanced GPP but the proportion of C buried declined to ~2% of GPP. Net ecosystem production was 17%–27% of GPP similar to that reported for other mangrove forests. Carbon isotope signatures of adjacent seagrass suggest that dissolved C from mangroves is exported into the adjacent ecosystems. Our data indicate that C budgets can vary among mangrove forest types and with nutrient enrichment and that low productivity mangroves provide a disproportionate share of exported C.
Keyword Rhizophora mangle
Carbon burial
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DEB-9981535
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 17 Nov 2015, 13:24:57 EST by System User on behalf of School of Biological Sciences