Biodiversity Budget. Timescale. Habitat Loss Gain Likely biodiversity outcome 14550m 2 Existing

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Merryl Fowler
5 years ago
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1 Biodiversity Budget The table below details the biodiversity budget (loss and gain) for the site. It is supported by Figure 1: Existing Biodiversity Plan and Figure 2: Proposed Biodiversity Plan in Appendix A. Habitat Loss Gain Likely biodiversity outcome Scrub 14550m 2 Existing Alder buckthorn (Frangula alnus) Blackthorn (Prunus spinosa) Bracken (Pteridium aquilinum) Bramble (Rubus fruticosus agg.) Butterfly-bush (Buddleja davidii) Cleavers (Galium aparine) Common hawthorn (Crataegus monogyna) Crab apple (Malus sylvestris) Dog rose (Rosa canina) Elder (Sambucus ebulus) European gorse (Ulex europaeus) Goat willow (Salix caprea) Hedge bindweed (Calystegia sepium) Hedge woundwort (Stachys arvensis) Pedunculate / English oak (Quercus robur) Sallow sp (Salix sp) Sycamore (Acer pseudoplatanus) Traveller s-joy (Clematis vitalba) 0m 2 Proposed Initial decrease in biodiversity. New species planted in other habitats will be beneficial for biodiversity gain. Timescale Medium term loss of habitat. 1

2 Semi-natural broad-leaved woodland trees 31600m 2 Existing Alder (Alnus glutinosa) Beech (Fagus sylvatica) Common ash (Fraxinus excelsior) Common hazel (Corylus avellana) Common hawthorn (Crataegus monogyna) English Elm (Ulmus procera) Holly (Ilex aquifolium) Pedunculate oak/english oak (Quercus robur) Sycamore (Acer pseudoplatanus) Wild cherry (Prunus avium) 31700m 2 Proposed and retained Field maple (Acer campestre) Alder (Alnus glutinosa) Silver birch (Betula pendula) Common Hazel (Corylus avellana) Common ash (Fraxinus excelsior) Common holly (Ilex aquifolium) Honeysuckle (Lonicera periclymenum) Wild cherry (Prunus avium) Blackthorn (Prunus spinosa) Pedunculate oak (Quercus robur) Goat willow (Salix caprea) Elder (Sambucus nigra) Retaining habitat, with additional planting of native species and management. Habitat to have no immediate loss or gain but in the long term, a habitat gain. Long term biodiversity increased with retained and additional planted habitat and management. Associated woodland field layer 31600m 2 Existing Alexanders (Smyrnium olusatrum) Barren brome (Anisantha sterilis) Black bryony (Tamus communis) Bluebell (Hyacinthoides non-scripta) Cotoneaster sp. (Cotoneaster sp.) Cow parsley (Anthriscus caucalis) Dog s mercury (Mercurialis perennis) Hart s-tongue fern (Phyllitis scolopendrium) Himalayan honeysuckle (Leycesteria formosa) Honeysuckle (Lonicera periclymenum) Ivy (Hedera helix) Japanese knotweed (Fallopia japonica) Lesser celandine (Ranunculus ficaria) Lesser stitchwort (Stellaria graminea) Lords-and-ladies (Arum maculatum) Navelwort (Umbilicus rupestris) Pendulous sedge (Carex pendula) Pignut (Conopodium majus) Primrose (Primula vulgaris) Ramsons (Allium ursinum) Scaly male fern (Dryopteris affinis) 31700m 2 Proposed Dogwood (Cornus sanguinea) Common hazel (Corylus avellana) Hawthorn (Crataegus monogyna) Spindle (Euonymus europaeus) Holly (Ilex aquifolium) Wild privet (Ligustrum vulgare) Crab apple (Malus sylvestris) Blackthorn (Prunus spinosa) Alder buckthorn (Rhammus frangula) Common buckthorn (Rhamnus cathartica) Wild gooseberry (Ribes hirtellum) Blackcurrant (Ribes negrum) Redcurrant (Ribes rubrum) Field rose (Rosa avensis) Dog rose (Rosa canina) Grey sallow (Salix cinerea) Guedler rose (Viburnum opulus) Retaining habitat, with additional planting of native species and associated management. Nonnative invasive species will be removed resulting in net gain. Habitat to have no immediate loss or gain but in the long term, a habitat gain. Long term biodiversity increased with retained and additional planted habitat and management. 2

3 Snowberry (Symphoricarpos albus) Spanish bluebell (Hyacinthoides hispanica) Wood avens (Geum urbanum) Wood dock (Rumex sanguineus) Semi-Improved Grassland / Meadow mix 6850m 2 Existing Bird s foot trefoil (Lotus corniculatus) Black medick (Medicago lupulina) Cock s foot (Dactylis glomerata) Common daisy (Bellis perennis) Common mouse ear (Cerastium fontanum) Common sorrel (Rumex acetosa) Creeping buttercup (Ranunculus repens) Dandelion (Taraxacum officinale) False oat-grass (Arrhenatherum elatius) Germander speedwell (Veronica chamaedrys) Hedge bedstraw (Galium mollugo) Herb-Robert (geranium robertianum) Perennial rye (Lolium perenne) Red clover (Trifolium pratense) Red fescue (Festuca rubra) Soft shield fern (Polystichum setiferum) White clover (Trifolium repens) Yarrow (Achillea millefolium) Yorkshire fog (Holcus lanatus) 10550m 2 Proposed Wildflowers: Yarrow (Achillea millefolium) Common knapweed (Centaurea nigra) Wild carrot (Daucus carota) Lady's bedstraw (Galium verum) Field scabious (Knautia arvensis) Oxeye daisy (Leucanthemum vulgare) Bird s-foot-trefoil (Lotus corniculatus) Musk mallow (Malva moschata) Ribwort plantain (Plantago lanceolata) Hoary plantain (Plantago media) Cowslip (Primula veris) Selfheal (Prunella vulgaris) Meadow buttercup (Ranunculus acris) Yellow rattle (Rhinanthus minor) Common sorrel (Rumex acetosa) Red clover (Trifolium pratense) Grasses: Common bent (Agrostis capillaries) Crested dogstail (Cynosurus cristatus) Red fescue (Festuca rubra) Sweet vernal-grass (Anthoxanthum odoratum) Timothy (Phleum pratense) Yorkshire fog (Holcus lanatus L.) Short term an area of this habitat is being created for reptile translocation. Therefore short term biodiversity gain. Medium and long term further gain to biodiversity. 3

4 Amenity Grassland 5000m 2 Existing Perennial Rye (Lolium perenne) 7900m 2 Proposed Highland bent grass (Agrostis castelanna) Raisa chewing fescue (Festuca rubra comutata ) Slender Creeping Red Fescue (Festuca Rubra Litoralis) Perennial Ryegrass spp. (Lolium perenne) No loss or gain. Habitat does not provide a biodiversity gain. Temporary disturbance of habitat, which will be replaced with a similar species. Short term loss, medium and long term gain. Formal shrub and bulb planting 700m 2 Existing Due to seasonality it was not possible to confirm whether bulbs are present on the site. General woody amenity plant species. 430m 2 Proposed General Areas: Beauty berry (Callicarpa bodinieri var. giraldii Profusion ) Clematis (Clematis armandii) New Zealand cabbage palm (Cordyline australis 'Torbay Dazzler') Flowering dogwood (Cornus florida f rubra) Sea holly (Eryngium variifolium) Hebe (Hebe pinguifolia Pagei ) Hebe (Hebe rakiensis) English ivy (Hedera helix Ivalace ) English ivy (Hedera helix Goldheart ) Lavender (Lavandula augustifolia) French lavender (Lavandula stoechas) Zebra grass (Miscanthus sinensis) Daffodils (Narcissus February Gold and Yellow Cheerfulness ) Pachysandra (Pachysandra terminalis) Virginia creeper (Parthenocissus quinquefolia) New Zealand flax (Phormium tenax) Staghorn sumac (Rhus typhina) giant feather grass (Stipa giganteum) feather grass (Stipa tenuissima) Tulips (Tulipa linifolia, Blue Heron and Ornamental Splendor ) Verbena (Verbena bonariensis) Non-native species. Non-native species, flowers may provide increased food source for invertebrate species resulting in a long term biodiversity gain. 4

5 Lesser periwinkle (pink) (Vinca minor 'Atropurpurea') Lesser periwinkle (purple) (Vinca minor 'Aureovariegata ) Crimson glory vine (Vitis coignetiae) Wisteria (Wisteria floribunda Rosea ) Roof Terrace: Red maple (Acer rubrum) Agave (Agave sp.) Bottlebrushes (Callistemon sp.) Fan palm (Chameraeops humilis) Silverbush (Convolvulus cneorum) 'Topsy Turvy' (Echeveria glauca) Spanish gorse (Genista Lydia) Common Ivy, English Ivy (Hedera helix sp.) Common sea-buckthorn (Hippophae rhamnoides) Chinese silver grass, Eulalia grass, maiden grass, zebra grass, Susuki grass, porcupine grass (Miscanthus sinensis) Russian sage (Perovskia atriplicifolia) Jerusalem sage (Phlomis fruticosa) New Zealand Flax (Phormium tenax sp.) Mountain pine or Mugo pine (Pinus mugo (+sp.)) 'Cheesewoods' (Pittosporum sp.) Dwarf White-Stripe (Pleioblastus variegata) Daisy bush (Olearia) Cotton lavender (Santolina chameacyparissus) Green santolina (Santolina virens) Stonecrops (Sedum sp.) Tamarisk (Tamarisk sp.) Lesser periwinkle and Dwarf periwinkle (Vinca minor) Adam's Needle (Yucca filamentosa) 5

6 Proposed bat boxes, bird boxes, insect boxes, reptile hibernacula 0 Existing Artificial Refugia in areas of bare ground spoil piles, waste metal and wood. 4 bird boxes 6 bat boxes 3 insect boxes 4 hibernacula To be installed on proposed and existing trees, fencing or posts. To be located by an ecologist on site. Increase to potential bird, bat and insect habitat. Loss of artificial reptile refugia, but gain in reptile hibernacula. Medium/long term gain. Devon hedgebank 0 lin.m Existing 162 lin.m Proposed Hawthorn (Crataegus monogyna) Plymouth pear (Pyrus cordata) Dog rose (Rosa canina) Hazel (Corylus avellan) Blackthorn (Prunus spinosa) Holly (Ilex aquifolium) Positive impact on biodiversity. Long term gain for biodiversity. Marginal and aquatic freshwater planting, pond and ditch 0 m 2 Existing 620m 2 Proposed total pond and ditch area Reed sweet-grass (Glyceria maxima) Flowering rush (Butomus umbellatus) Brooklime, (Veronica beccabunga) Water plantain (Alisma plantago-aquatica) Branched bur-reed (Sparganium erectum) Ivy-leaved crowfoot (Ranunculus hederaceus) Pondweed sp (native only) (Potamogeton sp) Yellow loosestrife (Lysimachia vulgaris) Purple-loosestrife (Lythrum salicaria) Meadowsweet (Filipendula ulmaria) Yellow iris (Iris pseudacorus) Positive impact on biodiversity. Long term gain for biodiversity. Ditch 210 lin.m Existing Seasonal use only often dry. 263 lin.m Proposed to contain some level of water at all times. Positive impact on biodiversity. Long term gain for biodiversity. Tidal watercourses 680m 2 Existing Waterways contain large amounts of discarded 820m 2 Retained Waterways to be cleared of existing debris and Short term disturbance to biodiversity Long term gain to biodiversity 6

7 debris and are culverted. Outside of survey area. existing culverts replaced with single bridge Saltmarsh 2260m 2 Existing Not within survey boundary. 2300m 2 Retained No change to biodiversity No change to biodiversity Avenue/Specim en trees 0 No. Existing 154 No. Proposed Californian redwood (Sequoia sempervirens) Monkey-puzzle (Auraucaria araucana) Cedar of Lebanon (Cedrus libani) Gum tree (Eucalyptus gunnii) Maidenhair tree (male only) (Ginko biloba) Wellingtonia (Sequoiadendron giganteum) Swamp cypress (Taxodium distichum) Ash (Fraxinus excelsior) Liquidambar (Liquidamber styraciflua) London plane (Platanus x hispanica) Pin oak (Quercus palustris) Common Alder (Alnus glutinosa) Non-native species, plants may provide potential habitat for faunal species resulting in a biodiversity gain. Non-native Ephemeral/ short perennial with components of tall ruderal / Unmade ground / Brown roof 29600m 2 Existing Broad-leaved dock (Rumex obtusifolius) Broad-leaved willowherb (Epilobium montanum) Colt s foot (Tussilago farfara) Common figwort (Scrophularia nodosa) Common nettle (Urtica dioica) Common ragwort (Senecio jacobaea) Creeping thistle (Cirsium arvense) Curled dock (Rumex crispus) Fennel (Foeniculum vulgare) Foxglove (Digitalis purpurea) Great mullein (Verbascum thapsus) Greater plantain (Plantago major) Hawkweeds (Hieracium agg.) Hogweed (Heracleum sphondylium) Moss (Moss sp.) 12800m 2 Proposed Including 1700m 2 [two gravel roofs, one laydown area)] No proposed planting left to self colonise Net loss The gravel roofs and laydown area will provide the replacement habitats for bird and invertebrate species in the long term. Medium term loss in habitat, however long term gain will balance it out. 7

8 Oxeye daisy (Leucanthemum vulgare) Perennial sow-thistle (Sonchus arvensis) Purple Toadflax (Linaria purpurea) Ribwort plantain (Plantago lanceolata) Rosebay willowherb (Chamerion angustifolium) Selfheal (Prunella vulgaris) Smooth sow-thistle (Sonchus oleraceus) Spear thistle (Cirsium vulgare) Teasel (Dipsacus fullonum) White melilot (Melilotus albus) Wild carrot (Daucus carota) Winter heliotrope (Petasites fragrans) Buildings and hard standing area 13100m m 2 Net gain. Minor negative impact on biodiversity. 8

9 Appendix A Figure 1: Existing Biodiversity Plan 9

11 Figure 2: Proposed Biodiversity Plan 10

Planting Strategy. Hedge. Coir roll

Planting Strategy. Hedge. Coir roll Planting Strategy The planting strategy aims to create a diverse replication of the native aquatic / marginal / terrestrial habitat typical of the River Brent, which is proposed to be implemented using