MCZ

Devon Avon Estuary designated as a Marine Conservation Zone

June 1st, 2019 | Author: Stuart Watts

Defra has announced (31 May 2019) the designation of the third tranche of Marine Conservation Zones (MCZs). All 41 new sites and the addition of new features to 12 existing MCZs proposed during last summer’s consultation are now designated.

I am sure you will be pleased to know that the Avon Estuary has been included in the designation in order to protect the features summarised below. Thank goodness for the Tentacled Lagoon Worm, which you – like me – had probably never encountered! I can’t help feeling that the entire exercise is a damp squib but time and future planning applications may prove me wrong.

The designation is described and briefly reviewed in the following document:-

DEVON_AVON MCZ

The government’s response to the consultation, outlining the evidence received and explaining the decisions taken on each site, can be found at: https://www.gov.uk/government/consultations/marine-conservation-zones-third-tranche-of-designations and full details of all sites are available at: https://www.gov.uk/government/collections/marine-conservation-zone-designations-in-england.

Consultation about designating the Devon Avon Estuary as a new Marine Conservation Zone

June 12th, 2018 | Author: Stuart Watts

DEFRA is consulting until 20th July 2018 about designating new Marine Conservation Zones, seeking any fresh information that might influence the decision. The summary sheet for the Avon Estuary proposal is available here – Devon Avon Estuary Factsheet

At present, the proposal does not include South Efford Marsh or the full extension of the Bass Nursery Zone out to Burgh Island.

The ACA, unsurprisingly, fully supports such a designation and our suggested modifications as a means of protecting the marine life of the estuary from unwarranted change, development or exploitation.

Our formal response is available for inspection here :- MCZ – Devon Avon Estuary

DEFRA reply – All responses will be considered before Ministers make their final decisions on which sites will be designated in the third tranche. We aim to designated this tranche within 12 months. Final decisions on which sites will be designated will take into account any relevant information submitted as part of this consultation. We will publish details of evidence received and a full Government response to these together with the final decisions on each site within 12 months. This will be placed on the consultations section of the Government web site.

An additional rationale for designating the estuary as an MCZ was sent to Natural England in early November 2018, as follows:-

Further to my original submission about designating the Avon Estuary in South Devon as a Marine Conservation Zone or MCZ (response I.D. = ANON- PGP8-UYCU-5), I hope it is not too late in the decision-making process to draw your attention to a feature of the estuary which I overlooked and which also was not mentioned explicitly in DEFRA’s Factsheet, although others may have mentioned it in their submissions.

This feature concerns the role of the inter-tidal salt marshes and mudflats of the estuary as important stores of ‘blue carbon’. As I’m sure your scientists at NE will readily acknowledge, these habitats are under constant threat from sea level rise, on the one hand, and development ’squeeze’, on the other. It becomes particularly important to conserve such carbon ’sinks’ in the face of climate change, irrespective of what individual species may dwell there. The following, italicised, passage succinctly presents the argument for conservation; it is taken from the website of BlueCarbonPortal.org.

‘Blue carbon’ is the carbon stored and sequestered in coastal ecosystems such as mangrove forests, seagrass meadows or inter-tidal salt marshes. These valuable ecosystems hold vast carbon reservoirs; they sequester atmospheric CO₂ through primary production, and then deposit it in their sediments. In fact, most blue carbon is found in the soils or sediments beneath the vegetation.

The rates of carbon sequestration and storage are comparable to (and often higher than) the sequestration rates in carbon-rich terrestrial ecosystems such as tropical rainforests or peatlands. Unlike most terrestrial systems, which reach soil carbon equilibrium within decades, deposition of carbon dioxide in coastal ecosystem sediment can continue over millennia. However, when these coastal ecosystems are degraded or destroyed they can become carbon dioxide sources due to the oxidization of biomass and organic soil.

Because coastal ecosystems do contain substantial amounts of carbon, and because this carbon is in danger of being released, they are important in mitigating climate change. Unfortunately, however, the rate of loss of mangroves, seagrasses and saltmarshes (driven mostly by human activities) is estimated to be among the highest of any ecosystem on the planet, prompting international interest in managing them more effectively for their carbon benefits.

Although the Avon Estuary’s contribution to carbon sequestration may be small on a planetary scale, that contribution strengthens the argument for its designation as a MCZ and for the inclusion of South Efford Marsh.

Posted in Main | Tags: blue carbon, environment, habitat, MCZ, salt marsh, South Efford marsh |

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Devon Avon Estuary designated as a Marine Conservation Zone

Glorious mud!

Consultation about designating the Devon Avon Estuary as a new Marine Conservation Zone