SUFFOLK BIODIVERSITY ACTION PLAN:

Report by Rob Parker


This report comprises the following sections, click on the bullet to choose ...

DETAILS OF THE SECOND SET OF PLANS
REEDBEDS
BITTERN

Maps and information on recording some of Suffolk's BAP species are available on the Suffolk Biological Records Centre website: Click here to go to main SBRC site


SUFFOLK BIODIVERSITY ACTION PLANS (second set)

The first set of Suffolk Biodiversity Action Plans (comprising 8 Habitats and 27 Species) was published in June 1998, and examples selected from these have been reproduced in earlier Newsletters. Action Plans for Reedbeds and Bittern, taken from the first set and reproduced here, continue this ongoing series.
The publication of the second set of Suffolk Local Biodiversity Action Plans in June of this year represents a significant step in the production of plans for the majority of the national priority habitats and species that occur in the county. It now remains to publish plans for coastal habitats and a number of the relevant remaining species. All of the national priority mammal, butterfly, moth and plant species occurring in Suffolk now have action plans along with a number of invertebrates and lower plants. The next step is to consider if there are any further plans that warrant a full Suffolk plan or whether the remaining species are best covered by existing habitat plans.
In addition to the national priority habitats and species, the second set of plans also includes habitats and species that are special to Suffolk. These have been termed "Suffolk Character Plans". They include an urban habitat plan and, amongst the species, barn owl, adder and native black poplar for which Suffolk is one of the strongholds. It is hoped in the near future to produce further Suffolk Character Plans for butterflies and moths in conjunction with Butterfly Conservation, and for the ant-lion, Euroleon nostras, an important invertebrate found on the Suffolk coast.
Details of selected examples from the second set of plans (listed below) will be included in future issues of the Newsletter.

Return to top of page

Habitat Action Plans

Wet woodlands

Lowland wood pastures and parkland

Lowland hay meadows

Lowland dry acid grassland

Eutrophic open water (includes ponds)

 

 

Suffolk character habitats

Urban

Species Action Plans

Barbastelle bat

Barbastella barbastellus

Lesser Horseshoe bat

Rhinolophus hipposideros

Nightjar

Caprimulgus europaeus

Linnet

Carduelis cannabina

Woodlark

Lullula arborea

Reed Bunting

Emberiza scheniclus

Corn Bunting

Miliaria calandra

Spotted Flycatcher

Muscicapa striata

Tree Sparrow

Passer montanus

Bullfinch

Pyrrhula pyrrhula

Turtle Dove

Streptopelia turtur

Tassel Stonewort

Tolypella intricata

Silver-studded Blue

Plebejus argus

Oak polypore

Buglossoporus pulvinus

Tower Mustard

Arabis glabra

Cornflower

Centaurea cyanus

Red-tipped Cudweed

Filago lutescens

Pillwort

Pilularia globulifera

Shepherd’s-needle

Scandix pecten-veneris

Small-flowered Catch fly

Silene gallica

Great Water-parsnip

Sium latifolia

Spreading Hedge-parsley

Torilis arvensis

Suffolk character species

Native Black Poplar

Populus nigra ssp. Betulifolia

Barn Owl

Tyto alba

Adder

Vipera alba

Water Shrew

Neomys fodiens

Unspotted Lungwort

Pulmonaria obscura

Return to top of page


REEDBEDS

Return to top of page

Reedbeds are a type of fen community dominated by reeds that primarily occur in the coastal regions of Suffolk. They provide breeding habitats for many rare, migratory birds and invertebrates and important wintering habitats for birds from elsewhere in the UK. East Anglia contains the majority of the reedbeds that remain in the UK.

1     Definition

Reedbeds are characterised by a dominance of Reeds Phragmites australis and occur in a wide range of permanently and periodically waterlogged habitats. Stands usually occur around lakes and ponds, in estuaries and on saltmarsh, and along dykes and canals. Other communities not dominated by reed are included in the fen action plan.

2     Current status

2.1     Local

Reedbeds are a rare habitat. The RSPB Reedbed Inventory suggests over 840 ha in Suffolk -almost 15% of the UK resource. However, the definition of reedbed used for this inventory was wider than that proposed here. There are five sites over 20ha, totalling 430ha (51% of the Suffolk total) (Benacre Broad, Easton Broad, Minsmere, Shottisham & Ramsholt and Walberswick).
Some 56 species of conservation concern (which meet the criteria for the UK Biodiversity Action Plan) in Suffolk depend fully or partly on reedbeds and associated fens. However, further research is necessary to fully identify the status of many species. In particular, the following are likely to provide the main focus: birds (Bittern, Bearded tit, Marsh harrier, Savi's warbler), moths and mammals.

2.2     Natural areas

Suffolk Coast Maritime, Suffolk Coast and Heaths, The Fens, The Broads, East Anglian Plain, Breckland.

3     Current factors affecting the habitat in Suffolk

  • The three largest reedbeds are threatened by coastal erosion and increasingly frequent saline incursion. In the case of some, such as Benacre Broad, this has already led to a substantial reduction in the size and quality of the reedbed.
  • Lack of biological information, particularly concerning reed bed invertebrates, hinders adoption of appropriate management.
  • Lack of appropriate management of some existing reedbeds leading to dehydration and scrub encroachment.
  • Lack of hydrological information.
  • Water abstraction leading to concern over freshwater supplies.
  • Inappropriate water level management.

4     Current action

  • Of the 12 largest sites all but two are within SSSls and most are under sympathetic management (eg, EN, RSPB reserves).

  • EN has management agreements with the owners of several sites.
  • The Suffolk River Valleys ESA offers incentives to landowners to maintain and manage reedbeds. Capital grants are available for restoration work.
  • Minsmere, Norman Gwatkin reserve (SWT) and Easton Valley will benefit from a three year EU-funded LIFE project for reed bed management for Bitterns.
  • RSPB are creating 200 ha of new reedbed on ex-arable land at Lakenheath.
  • WLMPs prepared or in preparation for major sites.

5     Action plan objectives and targets

1     Maintain existing overall area and quality as a minimum.
2     Enhance by managing for key species where requirements are known.
3     Audit existing reedbed resource, particularly for priority species.
4     Research habitat requirements for priority species.
5     Recreate, in advance of losses through coastal erosion, 200 hectares to maintain the current area. This will be as near as possible to existing sites on areas of low current nature conservation interest.
6     Recreate a further 600 hectares of new reedbed safe from future threat of sea level rise within Norfolk and Suffolk. This will be on areas of low current nature conservation interest.

Return to top of page


Bittern (Botaurus stellaris)

Return to top of page

The Bittern is confined almost entirely to wetlands dominated by reeds, where it feeds on fish, amphibians and other small water animals. The bird re-colonised the UK after extinction last century but has declined steadily in the last 30 years due to degradation of its habitat through lack of appropriate management as well as eutrophication.

1     Current status

1.1     National

Declining, localised and rare in the UK, confined almost entirely to lowland marshes in Norfolk, Suffolk and Lancashire. The UK population has declined to about 11 booming males in 1997 from a peak of c.80 in 1954. Numbers are boosted in winter by continental immigrants. It is a red list species having declined by over 50% in the last 25 years.

1.2     Local

The Bittern breeds only in two reedbeds on the Suffolk coast. Only four booming males were heard in 1997. It is more widespread in winter when even small reedbeds may be used.

1.3     Natural Areas

Suffolk Coast and Heaths

1.4     Protection

The Bittern is listed on Annex I of the EC Birds Directive and Appendix II of the Berne Convention. It is protected in the UK under Schedule 1 of the WCA 1981.

2   Current factors causing loss or decline

  • Loss of suitable breeding areas in fens and reed beds through natural succession and lack of appropriate management (particularly cutting and water management).

  • Degradation of habitat through eutrophication.
  • Food availability, especially eels, affected by inappropriate management.
  • Salt water intrusion into coastal reedbeds.
  • Vulnerability of species to severe winter weather.

3   Current action

  • All remaining Bitterns breed on SSSIs which are managed as nature reserves.

  • RSPB continues to carry out detailed ecological studies of Bitterns.
  • Management work has been carried out by EN and NGOs to benefit Bittern.
  • EN has operated a Bittern Recovery Project and LIFE funding has been granted for three years to support management for Bitterns at four sites in Suffolk.
  • The RSPB is creating a large new reedbed to benefit Bittern at Lakenheath in the Suffolk Fens.

4    Action plan objectives and targets

1    Arrest the decline of the Bittern, maintaining at least four booming birds over the present range and start to increase the population and range before the year 2000.

2   Increase the population to about 15 booming males by 2010 by ensuring appropriate management of the existing large reedbeds where Bittern once occurred.
3   Initiate work to secure the long-term future of Bitterns in Suffolk by providing suitable habitat for a population of not less than 25 booming males by 2020.

Return to top of page