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Blue Carbon - Wiley Online Library

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Last Updated: 12 April 2022

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Beyond habitat boundaries: Organic matter cycling requires a system‐wide approach for accurate blue carbon accounting

We found low carbon content in benthic sediments of Bah's Bah etn, only marginally higher in Zostera marina beds, leading to remineralization and hydrodynamically driven export of seagrass fibers, resulting in low carbon burial rates. Compared to benthic sediments, salt marshes in San Quintn derive 40% of their organic matter from autochthonous matter, with higher carbon burial rates and sediment carbon densities. This report discusses the connectivity of blue carbon habitats with marsh plant detritus supplementing benthic carbon burial and incorporation of detrital eelgrass in marsh sediments. Our findings show the value of allochthonous organic matter for carbon sequestration in blue carbon habitats, and that standard accounting methods that exclude allochthonous organic matter would jeopardize carbon burial's full potential for carbon sequestration.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/lno.12071


Seagrass meadows mixed with calcareous algae have higher plant productivity and sedimentary blue carbon storage

Carbon sequestration rates in meadows can, among other things, differ greatly among meadows, depending on, among other things, the plant community's composition. Tropical seagrass meadows are often mixed with macroalgae, some of which are calcareous, and space can often be compared to seagrass for nutrients, light, and space. Although photonthetic CO2 uptake by both seagrasses and calcareous algae will raise the overall calcification rate in the system, the calcification process of calcareous algae can lead to the release of CO2, impacting both productivity and calcification, and eventually the meadows' carbon storage. Plant community composition in a tropical seagrass-dominated embayment influenced plant growth, CaCO3 production, and sediment carbon levels, according to this report. Lower and moderate densities of calcareous algae boosted seagrass biomass growth, while seagrass removed calcareous algae's production but raised their CaCO3 content.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/ece3.8579


Pore‐water exchange flushes blue carbon from intertidal saltmarsh sediments into the sea

During the spring tide, both crab burrow flushing and delayed seepage of surface water infiltrating sediments were allowed to surface waters. The outwelling flux of dissolving inorganic carbon exceeded that of dissolving organic carbon. Before porewater carbon is exported to the ocean, there must be some carbon deposition within the saltmarsh. Overall, pore-water exchange and outwelling are two key elements of saltmarsh carbon budgets, and should be considered when determining their carbon sequestration potential and climate change mitigation plans.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/lol2.10236


Modeled approaches to estimating blue carbon accumulation with mangrove restoration to support a blue carbon accounting method for Australia

We investigated whether carbon accumulation in natural mangroves could be used to estimate carbon accumulation during restoration; modeling mangrove biomass accumulation; and how simulated carbon accumulation could be achieved over heterogeneous locations to assist in the development of a blue carbon method for Australia under the Emission Reduction Fund scheme. We collected mangrove biomass accumulation in Australia from global chronosequence studies, which we used to develop regional models for estimating biomass accumulation with recovery using values from local natural mangroves. Estimating biomass carbon accumulation using site-based means of stand biomass yielded similar estimates as values were calculated by elevation and lowered overestimates of biomass accumulation based on regional average values. Our review provides a roadmap for modeling blue carbon pools for an Australian blue carbon method that acknowledges regional variations and is based on data from natural mangroves.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/lno.12014

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions