Monday, 31 August 2015 Login Register

Welcome to the North Cave Wetlands

We will be publishing a Report on the last 5 years of the Reserve & are appealing for any pictures of birds, butterflies, dragonflies, insects, mammals or scenic images taken over this period. Please send the images to mikeashforth@btinternet.com
Thank you

Welcome to our Wetlands, a Yorkshire Wildlife Trust Reserve of regional importance for birds, run by the Trust in partnership with our dedicated team of local volunteers and developed in partnership with Humberside Aggregates (H. Agg)

Seating arena

The new seating area is now open, and gives good views of the Village Lake & the feeding station


Scene from the new viewing point

North Cave Wetlands would like to thank Johnson & Jeff for their kind sponsorship of the reserve feeding stations



Work parties

Regular work days have started on the reserve and everyone is more than welcome, they are held on the 2nd and 4th Thursday of every month. Please contact Tony Martin 07825668420 if interested


We have recently identified two highly invasive plant species within the Dragonfly ponds, these are Australian Swamp Stonecrop (Crassula helmsii) and Parrots feather (Myriophyllum aquaticum). Both of these species are non-native and extremely invasive, the plants grow around the margins of ponds and in water up to 3m deep. Crassula helmsii forms very dense stands, it appears as a small tussock and then spreads rapidly to form a dense mat of vegetation. This mat then out-competes all other aquatic vegetation, eliminates native flora and creates a poorer ecosystem for invertebrates. Severe oxygen depletion can then occur. The plant assimilates CO2 for 20 hours of the day when submerged due to the possession of crassulacean acid metabolism and grows throughout the year, there is no dormant period.

 Control and eradication of these plants is very difficult and the first priority is to contain them to avoid further infestations and encroachment into surrounding water bodies. We have used chemical control to eradicate the plant but with minimal success.

 As you can see we have netted the pond to ensure the plant cannot be transported to other water bodies and an eradication programme is underway with guidance from Natural England. 


History

 The 40 ha. original Reserve to the north of Dryham Lane includes some 20 ha. of water, following extraction of sand and gravel by H. Agg over the 20 years leading up to acquisition of the site by the Trust in 2000. 

 We inherited 6 deep and bare holes. Over the next 3½ years H. Agg made a wonderful job of moving some 250,000 tonnes of material into, out of, or around the site to our specification, with considerable design assistance from Roger Mitchell of Potteric Carr.    The 10m deep Reedbed Lake was infilled with inert material to make a shallow lake with islands and reedbeds.  The 1½ ha. Island Lake was made into a 3 ha. shallow lake with numerous islands.  The water level in Village Lake was reduced to expose gravel beds.  All the lakes were connected underground with a gravity driven water level management system and with the overflow taken into Black Dyke to the north.  We now submerge shallow gravel islands in the winter with rain ground and spring water, to limit vegetation.  We expose them in the spring for passage and breeding waders and ducks. 

 The infrastructure was completed with 3 large hides (2 with disabled access), paths, rafts, interpretation boards, seats, screens and bird tables.  The perimeter path  and hides were positioned to give optimum viewing for serious birders, novice naturalists and photographers alike.   The eastern boundary was planted up with winter berry-bearing bushes to create a visual and noise screen from the main road and to add habitat.   Wader scrapes and small dragonfly ponds extended site biodiversity.  Dryham Lane was surfaced, a car park created, and from 2008 Angela Brown’s Wild Bird Cafe has been dispensing hospitality 7 days a week. 

 In 2004 H. Agg bought 42 ha. of farmland to the south of Dryham Lane and to the west of our original boundary, and asked us to partner them in a planning application for a Phase 2 development.  Planning approval was subsequently granted to “extend North Cave Wetlands by the extraction of 3.4 million tonnes of sand and gravel”.  Quarrying of the 17 ha. Dryham Ings started in 2008 and was completed in 2011.  By 2013 restoration work had been largely finished, creating three flat interlinked cells of flood meadowland to the design of Phil Fermor of Middlemarch Environmental.   YWT staff specified the splendid 60 sq.m. Crosslands Hide, built of timber frame with straw bale infill, to overlook the new meadowland to the east, H. Agg’s silt pond and future extensions to the west. 

 The Future – the Western Extension

 By 2013 the original Reserve plus Dryham Ings and the silt pond extended to some 60 ha.   The remaining 20 ha. of Phase 2 will be excavated and restored up to 2016 as deep water lakes;  this is the area of deepest aggregate deposit.  But expansion won’t stop there, for in 2008 we partnered H. Agg in a successful planning application again to quarry a further 57 ha. of farmland to the south and west of Phase 2.  The aggregate deposits to the west are shallower, enabling H. Agg to restore this land for us to a mixture of shallow water, more flood meadowland and reedbeds over the next 12 years.


 

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