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Sediment properties as important predictors of carbon storage in Zostera marina meadows: A comparison of four European areas

Artikel i vetenskaplig tidskrift
Författare M. Dahl
D. Deyanova
S. Gütschow
Maria. E. Asplund
L. D. Lyimo
V. Karamfilov
R. Santos
M. Björk
M. Gullström
Publicerad i PLoS ONE
Volym 11
Nummer/häfte 12
ISSN 1932-6203
Publiceringsår 2016
Publicerad vid Sven Lovén centrum för marina vetenskaper
Språk en
Länkar dx.doi.org/10.1371/journal.pone.016...
Ämneskategorier Marin ekologi

Sammanfattning

Seagrass ecosystems are important natural carbon sinks but their efficiency varies greatly depending on species composition and environmental conditions. What causes this variation is not fully known and could have important implications for management and protection of the seagrass habitat to continue to act as a natural carbon sink. Here, we assessed sedimentary organic carbon in Zostera marina meadows (and adjacent unvegetated sediment) in four distinct areas of Europe (Gullmar Fjord on the Swedish Skagerrak coast, Askö in the Baltic Sea, Sozopol in the Black Sea and Ria Formosa in southern Portugal) down to ∼35 cm depth. We also tested how sedimentary organic carbon in Z. marina meadows relates to different sediment characteristics, a range of seagrass-associated variables and water depth. The seagrass carbon storage varied greatly among areas, with an average organic carbon content ranging from 2.79 ± 0.50% in the Gullmar Fjord to 0.17 ± 0.02% in the area of Sozopol. We found that a high proportion of fine grain size, high porosity and low density of the sediment is strongly related to high carbon content in Z. marina sediment. We suggest that sediment properties should be included as an important factor when evaluating high priority areas in management of Z. marina generated carbon sinks. © 2016 Dahl et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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