HomeMy WebLinkAboutDocumentation_Environmental Advisory Committee_Tab 10_8/14/2024 Agenda Item #10.
Environmental Advisory Committee (EAC)
STAFF MEMO �
Meeting: Environmental Advisory Committee (EAC) - Aug 14 2024
Staff Contact: Brad Freese Department: Environmental Advisory
Committee
Blue Carbon: Mangrove Restoration Efforts for GHG Reduction, Shoreline Protection, and Healthy
Habitats.
Attached is a memo from Chair Brad Freese highlighting the benefits of mangrove restoration, along
with a presentation from the DEP about grant opportunities. Further information can also be found at
the below links.
Florida's Mangroves I Florida Department of Environmental Protection
Resilience and Coastal Protection Project Funding Sources I Florida Department of Environmental
Protection
This document and any attachments may be reproduced upon request in an alternative format by
completing our Accessibility Feedback Form, sending an e-mail to the Village Clerk or calling 561-
768-0443.
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Blue Carbon Memo-Chair Freese
Florida Coastal Management Program Grants
Page 102 of 124
Agenda Item #10.
V *111age of T
345 Tequesta Drive 561-768-0700
Tequesta, FL 33469 www.tequesta.org
TO: Environmental Advisory Committee
FROM: Brad Freese, Chair EAC
DATE: 8/14/2024
SUBJECT: Blue Carbon: Mangrove restoration efforts for GHG reduction, shoreline protect,
healthy habitats
Mangroves are one of the most effective ecosystems at capturing and storing blue
carbon, which is the term given to carbon captured by our oceans and coastal
ecosystems. Mangroves capture carbon dioxide (CO2) from the atmosphere through the
process of photosynthesis, and use this carbon to produce organic matter,which is then
stored in their biomass and sediments. Mangroves and wetlands store 3 to 5 times more
carbon and sequester or capture up to to times more carbon per equivalent area than
rainforests. The National Oceanographic and Atmospheric Agency(NOAA) has dated
carbon back thousands of years in sediment samples. Coastal blue carbon is stored in
the soil, not in above-ground plant materials as with tropical forests.
Mangroves, tidal marshes, and seagrasses have been recognized as blue carbon coastal
ecosystems as they accommodate large carbon stocks, enable long-term carbon storage,
have the capacity to control greenhouse gas emissions and possess the potential to
reduce the rise in atmospheric CO,levels. In the tropical and subtropical intertidal
zones, mangroves show significant productivity and rapid deposition rates. Mangroves
play an important role in capturing, transforming, and storing CO2 in the atmosphere
into coastal sediments for a long time, displacing organic carbon from the coastal zone
to the offshores and the ocean. Mangroves also help in preventing storms,
hurricanes, coastal erosion, and tidal waves. Recently, mangroves have been threatened
by natural and anthropogenic activities such as urbanization, pollution, aquaculture and
tourism. They are expected to hamper their essential services, such as coastal
defense, breeding grounds for aquatic organisms' seafood supply, etc. Despite the
importance of mangrove forests in carbon sequestration and the numerous goods and
services they offer humans, wood and non-wood forest products, food, fisheries,
medicines, eco-tourism, and recreation. These mangrove ecosystems are deteriorating at
alarming rates, necessitating immediate intervention. Thus, the protection, restoration
and conservation of this ecosystem are gaining considerable attention from researchers
across the globe.
This document may be reproduced upon request in an alternative format by contacting the Village
Clerk's Office at 561-768-0440 or by completing our accessibility form: https://bit.ly/3mnfeU4
Page 103 of 124
Agenda Item #10.
(Choudhary B. et al,June 2024. Blue carbon and the role of mangroves in carbon
sequestration:Its mechanisms, estimation, human impacts and conservation
strategies for economic incentives. Journal of Sea Research. Abstract)
Significant efforts have been invested to restore mangrove forests worldwide through
reforestation and afforestation. However, blue carbon benefit has not been compared
between these two silvicultural pathways at the global scale. Here,we integrated results
from direct field measurements of over 37o restoration sites around the world to show
that mangrove reforestation (reestablishing mangroves where they previously
colonized) had a greater carbon storage potential per hectare than afforestation
(establishing mangroves where not previously mangrove). Greater carbon accumulation
was mainly attributed to favorable intertidal positioning,higher nitrogen availability,
and lower salinity at most reforestation sites. Reforestation of all physically feasible
areas in the deforested mangrove regions of the world could promote the uptake of
671.5-688.8 Tg CO2-eq globally over a 40-year period, 60% more than afforesting the
same global area on tidal flats (more marginal sites).Along with avoiding conflicts of
habitat conversion, mangrove reforestation should be given priority when designing
nature-based solutions for mitigating global climate change.
(Song, S., Ding, Y., Li, W. et al.Mangrove reforestation provides greater blue carbon
benefit than afforestation for mitigating global climate change.Nat Commun 14, 756
(2023). https://doi.orp/lo.1038/s41467 023-364=-1)
There is an abundant amount of data supporting the benefits of mangroves to the
overall environment:
• GHG reduction through carbon sequestering and storage
• Shoreline protection and resiliency
• Marine life habitat
Page 2 of 2
Page 104 of 124
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