Introduction
The Great Crested Newt (Triturus cristatus) is an amphibian. It is the
largest of the 3 newt species native to Britain. Adults measure between
11cm and 16cm in length. Both sexes are very dark above with
yellow-orange undersides spotted with black. They do not have any
webbing or fringes around their toes. Males in breeding condition are
very distinctive with a large indented crest running along their length
with a gap in the crest at the base of the tail. Insert picture Habitat:
Ideally ponds which support breeding populations of this species have
'no fish, little pollution, a depth of 50cm to 100cm', are medium sized,
may dry out periodically and have a 'moderate growth of aquatic
vegetation such as duckweed and water starwort'. Open areas within ponds
are also needed for displaying males and are favoured by the newt
larvae. A diverse terrestrial habitat (mixture of scrub and rough
pasture) is also required with corridors of suitable habitiat (hedges
and ditches) to aid dispersal. Great Crested Newts may move more than
200 metres from their breeding pond and juveniles may travel further.
Adults may hibernate on land under bark, in logs, piles of leaves and
disused burrows. However, larvae, juveniles and adults may hibernate
underwater in the mud at the bottom of ponds.
Current Status
Legal status:
The species is listed on Annexes II and IV of the EC
Habitats Directive and Appendix II of the Bern Convention. It is
protected under Schedule 2 of the Conservation (Natural Habitats etc)
Regulations 1994 (Regulation 38) and Schedule 5 of the Wildlife and
Countryside Act 1981. An English Nature licence is required to carry out
any work relating to the species other than observing by torchlight.
Nationally:
The species is still quite widespread across Britain
although absent from Northern Ireland. It is more common in lowland
England and Wales where it may be numerous locally. It is a priority
species within the UK BAP process having suffered a decline in recent
years (estimated at 25-49% in numbers and range since the 1970s).
Britain's population is amongst the largest in Europe where it is also
in decline so the British population is seen as important in
international terms.
Regionally:
There are 2 distinct distributions separated by the acid
gritstone moorland of the Dark Peak. One, centred around the White Peak
has been described as 'an important national stronghold' for the species
and has been surveyed on several occasions since the 1980s. Insert the
distribution map reproduced from the Sorby Reptiles and Amphibians
publication. The other distribution is centred around the area along the
Rother Valley within North East Derbyshire and South Yorkshire and
further east. There are also recent records for many of the sites here
but survey work has been more patchy.
Locally:
Occasional and single
records have been collected within Sheffield'sAP area from, for
example, Millhouses, Nether Edge, Beauchief, Norton, Frecheville and
Holbrook. It is thought that most of the records from the centre of
Sheffield may be past introductions, escaped pets and/or the Italian
Crested Newt (T.carniflex) which is similar in appearance. The only
confirmed breeding ponds in the Sheffield BAP area are within the Rother
Valley at the Woodhouse Washlands (YWT) nature reserve and Holbrook
Marsh. The Washlands site has been known for a number of years and has
been surveyed annually from the mid 1990s when the nature reserve was
declared. Fieldwork by Steve Toher in 1999 established that there is a
breeding population at Holbrook. It is possible that there are other
local populations which have not yet been identified.
Threats
The loss of suitable breeding ponds.
Nationally, a 2% decline every 5
years in the number of suitable ponds was indicated in studies
undertaken in the 1980s. Ponds may be destroyed or become neglected or
polluted. They may also be managed inappropriately, have fish introduced
into them and suffer increased pressure from wildfowl.
The loss of suitable terrestrial habitat adjacent to ponds.
Changes in
agricultural practices, increased recreational and educational uses as
well as encroachment from residential and industrial development all
contribute to the loss of suitable site.
Loss or destruction of hibernacula and refuges.
Similar factors apply
as in the case of the general loss of terrestrial habitats but there is also
the problem of inappropriate management of ponds and the surrounding areas.
Fragmentation of habitats.
There is a decrease in the potential for
colonisation or re- colonisation of suitable habitiats with the destruction
of corridors through wetlands and along hedgerows.
Current Initiatives
- JNCC
have published a 5 year framework (1994-1999) for the conservation of
amphibians at a national level. Also at national level a worker is funded to
co-ordinate surveys and publicity material has been published.
- Sorby
Natural History Society (SNHS) and Sheffield City Museum published a report
on the 'Reptiles and Amphibians of the Sheffield Area and North Derbyshire'
in 1997. This collated records of the Great Crested Newt at a regional
level.
- SNHS Amphibian Group have an ongoing programme of surveying,
recording and monitoring for amphibians within the area. They are also
hoping to re-survey old sites and do some publicity for the general public.
- Work is continuing on the Woodhouse Washlands (YWT) nature reserve to
record the species and manage the site appropriately.
Objectives
- Determine the extent and distribution of the existing population.
Target: Initial survey work to be completed and a programme of re- surveys
agreed by 2001.
- Maintain the viability and where possible expand the
existing population through conservation management and site protection.
Target: Increase the existing breeding population by 200% by 2004.
- Increase the awareness of the species and its habitat requirements amongst
land owners, land managers, voluntary organisations and the general public.
Target: All relevant land owners, land managers and voluntary organisations
to be made aware of the status and habitat requirements of the species and
general awareness amongst the public to have increased 'significantly' by
2002.
Proposed Actions
Policy and legislation
- Support the enforcement
of the current legislation.
- Ensure that all the ponds and surrounding
terrestrial habitat with viable or the potential for viable populations are
identified in part II of the Unitary Development Plan (UDP).
- Ensure that
the protection and enhancement of these ponds are taken into accountin
accordance with paragraph 24 of Planning Policy Guidance Note: PPG9.
- Support moves to create new pond protection measures to prevent
deterioration and loss of Great Crested Newt habitat.
Site Safeguard and
Management
- Ensure that the presence of Great Crested Newts are taken into
account when considering the impact of any planning or development proposals
which may threaten known or potential habitats.
- Ensure that the presence
and habitat requirements of the species are taken into account when
developing and implementing site management plans.
- Encourage the
production of management plans for all sites where breeding populations have
been identified and for potential sites which could support breeding
populations.
- Establish and maintain links with land owners and land
managers on sites where Great Crested Newts are known to occur.
Species
Management and Protection
- Ensure that the protection given by the current
legislation and policies are publicised and enforced.
- Encourage natural
dispersal to new sites through suitable habitat management.
- Consider
establishing a re-introduction/translocation programme to restore
populations at suitable sites.
Advisory
- Develop a good practice guide
on managing the species and its habitat requirements for use with land
owners, land managers and others.
- Support training on the management and
conservation of the species.
- Develop links and the exchange of
information between all interested partners.
Research and Monitoring
- Undertake a programme of regular surveys to
identify the distribution and level of the population; specifically the
number of sites with breeding populations and potential to support breeding
populations.
- Support more detailed studies of populations at key sites to
establish preferred habitat use and population dynamics.
- Contribute
towards the establishment and maintenance of national and regional databases
by sharing the results of surveys and monitoring exercises.
Communications and Publicity
- Develop a campaign to raise awareness
amongst the general public through the local media, leaflets, displays and
talks.
- Publicise the results of surveys and encourage the dissemination
of information between all interested groups, statutory bodies and the City
Council.
- Support initiatives to promote a wider and more sympathetic
understanding of amphibian conservation.
Associated Action Plans
- Ponds
- Grazing Marsh
- Wet Grassland/Wetland
- Hedgerows
- Scrub/Woodland
Edge
- References
- Reptiles and Amphibians of the Sheffield Area and North
Derbyshire, Sorby Record Special Series No.11, 1997, Derek Whiteley
- Newts
of the British Isles, Shire Publications, 1989, PJ Wiesniewski
- Biodiversity : The UK Steering Group report Vol.2 Action Plans, HMSO, 1995
- Draft SAP for the Great Crested Newt, Rotherham MBC, 1999, Jacqui North.
- Holbrook record pers. comm. from Derek Whiteley, April 1999.