21/08/2018

Bonanza of Butterflies


Bonanza of butterflies in Ness Gardens meadow

The hot sunny weather during May, June and July apparently has boosted the abundance of many butterfly species monitored regularly by the wildlife volunteers, at Ness over a period of ten years.







The species-rich meadow was created eleven years ago following the habitat creation plan provided by Dr Phil Putwain. It is now a vibrant assemblage of meadow plants (see ERS May Blog post featuring cowslips), bees, butterflies and numerous other insects.



This summer there were record numbers of Common Blue butterflies (46 in 30 minute count) and also Small and Large whites. Possibly the very hot May and June enhanced survival of larvae for the second summer emergence of Common Blue adults. The grassland species Small Skipper and Small Copper were much more abundant than in previous years whilst Meadow Brown was abundant but substantially less than in 2013 and 2014. 


Other pleasing sightings were Painted Lady, Ringlet and Brimstone. In contrast species in Tribe Nymphalini (Peacock, Red Admiral and Small Tortoishell) have been much less abundant so far this year. The species richness of native perennials is an important element in habitat provision for butterflies.

20/06/2018

Silver Studded Butterfly Conservation

June 2018
Safeguarding the Silver-studded Blue butterfly: restoration of its heathland habitat at Prees Heath Common Reserve, Shropshire eleven years after kick-off.




Prees Heath Common in Shropshire has supported the last population of the butterfly in the English Midlands since the 1970s on small areas of relict heathland. 

Butterfly Conservation purchased part of the Common to safeguard this population and to undertake re-creation of lowland heathland in an attempt to ensure the butterfly’s persistence due to a very increased area of suitable habitat for the population. Dr Phil Putwain originally advised Butterfly Conservation on the method for creation of heathland 5 areas previously used for arable agriculture.

The method included deep ploughing for soil profile inversion to 900mm and incorporation of pelletised sulphur to reduce substrate pH from around 7.0 to 4.0. It was hoped the acid soil pH would persist for many years. The sulphur was incorporated in summer 2007. Each year since then numerous soil samples have been tested annually for pH.  Phil Putwain  tested samples collected in mid-June. Soil pH remains low at 4.5 eleven years later. The graph below shows the timeline of pH values. To date pH remains suitable for heathland habitat. 



13/05/2018

Record Cowslip Survey




This April and May more cowslips than ever are flowering in the Wilderness Meadow at Ness Botanic Gardens. There is a host of more than 35,000 cowslips creating a dense splash of yellow across the field. The meadow was designed by Dr Phil Putwain and sprang into life 9 years ago when when an area of species-poor rough grassland overlooking the Dee Estuary, almost two hectares in area, was ploughed to a depth of up to one metre (inverting the whole soil profile) bringing infertile sandy subsoil to the surface. Seed of 23 species of traditional hay meadow forbs (including cowslip) and grasses was sown in 2009. Spontaneous colonisation by just over 100 plant species also occurred over the subsequent 10 growing seasons. Please visit Ness Gardens if you can and experience the magnificant meadow.

20/04/2018

Bolton Fell Moss Cumbria

 
Restoring degraded former raised bog at Bolton Fell Moss Cumbria

Dr Phil Putwain organised the first Joint ERHC-SIG and NW member network site visit hosted by Natural England north Cumbria and led by Deborah Land (NE) and Keeley Spate (NE), 23rd March 2018.


Nineteen enthusiastic CIEEM members assembled at Bolton Fell Moss on a rare warm March day to discuss and assess the progress of raised bog restoration. The field site visit to Bolton Fell Moss SSSI involved seeing ‘first hand’ the degraded state of a significant proportion of this cut over, former raised peat bog, after many years of commercial peat extraction.

The Cumbria BogLIFE project (EU and DEFRA funded) is undertaking largescale restoration works, using specialist contractors and innovative techniques.  The project will directly restore 507 hectares (ha) of degraded bog habitat.

The focus of the site visit was to discuss the restoration challenges, the restoration and habitat creation techniques, ongoing management and the strategic development of the restoration process in the long-term.

Deborah stressed the importance of intervention to modify site hydrology so that it is a close to optimum as possible.  This involved re-creating wetter, boggier ground – by blocking drainage ditches and creating ‘bunds’ (small walls of undamaged, wet peat) that will hold water within the bog, but avoiding retention of large permanent areas of pooled water.

Bonanza of Butterflies

Bonanza of butterflies in Ness Gardens meadow The hot sunny weather during May, June and July apparently has boosted the abundance o...