Posts Tagged ‘environment’

Avon runs low

The Environment Agency has two gauging stations for monitoring water levels on the Avon, at Didworthy and Loddiswell.  Data from both indicate a severe reduction in water flow during the current very dry spell of weather, especially in the lower reaches.

On Saturday 21st July, the depth at Didworthy was 0.35m (normal range = 0- 1.4m) and at Loddiswell was 0.19m (normal range = 0.25-1.8m).

 

 

Gravel augmentation helps salmon to breed in upper Avon

A programme of gravel augmentation has been successfully carried out on the upper Avon by the Westcountry Rivers Trust, funded by South West Water, as an extension of collaborative work to improve the riparian environment for fish.   Gravel is an essential component of the salmon breeding grounds but on the Avon these breeding areas have become depleted because the natural flow of gravel downstream is interrupted by the Avon Dam.   Details of the work are available here:-

http://wrt.org.uk/gravel-bringing-salmon-back-to-devon-river/

ACA launches its Sea Moor Lotto page to raise funds for conservation

We have launched our Sea Moor Lotto page to help raise funds in support of our work on the Devon Avon.  Please help by buying a ticket or two.  Click on the link below for more details:-

we-have-launched-on-seamoor-lotto – digital

AVON PATROL SAVED FOR 2018!

Readers may be interested in an example giving some insight into our behind-the-scenes activities – all carried out by unpaid volunteers.  On the topic of the Avon Patrol, I heard just before the Avon Estuary Forum in May that this vital service was to be withdrawn, as a cost-saving measure, on the recommendation of the former Salcombe Harbourmaster.   None of those organisations that had contributed to the patrol for many years had been informed, including the ACA; one had even been invoiced for their 2018 contribution!  After a prolonged series of email enquiries and complaints to Parish, District and County Councillors, as well as the Manager of Commercial Services at SHDC, I was informed eventually that some way would be found to resurrect the patrol for July, August and September this year but that the future of the service beyond 2018 was uncertain.   However, a new Salcombe Harbourmaster has been appointed since this story broke and, as of today, I have been told by him that the usual patrol service will be resurrected from 1st July and I sense that we can expect a more enlightened and collaborative approach towards our estuary from SHDC in the future.

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

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.