Hortua, Daniel, Zimmer, Martin, Teichberg, Mirta and Gillis, Lucy (2019) Factors Affecting Seascape Carbon Dynamics: a Perspective from Zanzibar Mangrove Forests and Seagrass Beds. [Poster] In: MMM5. , 01.07.-05.07.2019, Singapore .

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Mangrove and seagrass plants take up and store carbon from the atmosphere in their biomass. Additionally, the architecture of mangrove tree roots and the shape of seagrass leaves could enhance the retention of suspended particulate matter within the ecosystems and support carbon accumulation. Most studies in mangrove forests and seagrass beds Blue carbon have been done with the focus in one ecosystem without taking into account adjacent ecosystems. Evaluating mangrove forests and seagrass beds along with adjacent ecosystems will contribute to a better knowledge of carbon dynamic at the seascape level. We selected six locations in Unguja Island of the Zanzibar archipelago, three mangrove forests adjacent to seagrass beds, one isolated mangrove forest, and two isolated seagrass beds. We quantified carbon in mangrove and seagrass biomass and the quantity of organic and inorganic carbon in the sediment across the seascape, including adjacent mud flats and terrestrial soils. We evaluated factors that could affect the sediment carbon content in the sediment, using linear and generalized linear mixed effects models with the factors biomass, species composition and functional richness (traits), sediment characteristics and area of the ecosystem as predictors. The tree community composition differed among locations, as well as the carbon content of the mangrove biomass. Seagrass species composition also varied across locations. The sediment carbon within mangrove forests exhibited a higher proportion of organic carbon, while in the sediments of seagrass beds the inorganic carbon presented a higher proportion. In mangroves forests, factors like forest area and functional richness explained the differences in sediment carbon content among sites. In seagrass beds, functional richness explained the differences in sediment carbon content among sites. The separation of organic and inorganic carbon in tropical blue carbon stock studies will help to improve our understanding of dynamics in the different carbon components.

Document Type: Conference or Workshop Item (Poster)
Research affiliation: Ecology > Mangrove Ecology
Ecology > Algae and Seagrass Ecology
Date Deposited: 21 Oct 2019 10:31
Last Modified: 01 Oct 2020 12:59
URI: http://cris.leibniz-zmt.de/id/eprint/2782

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