Cornwall's Biodiversity Action Plan - Cornwall Wildlife Trust

Cornwall's Biodiversity Action Plan - Cornwall Wildlife Trust


Within this document it has been decided to set targets for

the county rather than each individual project. This will allow

monitoring and reporting to be consistent with Regional and

National BAP targets as there will be direct comparison to

methodologies used in defining the targets.

At each project development stage realistic targets should be

set for habitat maintenance and restoration/expansion. These

will then feed into the county targets, i.e. the Wild Penwith

Project has contributed x amount to the county targets, y

amount to regional and z to the National targets.

Maintenance target

Data from ERCCIS and Cornwall’s Landcover 1995-2005

(2010) 8 report have been used to establish the baseline

figures for each BAP habitat where information is available.

Baseline figures are not available for some BAP habitats as

insufficient survey work has been undertaken. Different levels

of confidence for these figures have been applied, the lack of

certainty derives both from the lack of clarity in the habitat

definition and incompleteness of fieldwork data in the county.

The figures for extent have been used to indicate the

maintenance target for each of these BAP habitats. The

habitats which have no maintenance figures are due to the

fact that these areas of habitat cannot be quantified; however

it is important that the current extents of these habitats are

maintained. Once these habitats have been surveyed and

mapped then numerical targets can be set.

Expansion/restoration target

The methodologies used to define the expansion/restoration

targets vary depending on data available. Three methods have

been used and these are summarised below.

Method 1

All habitats mapped on South West Nature Map have the

expansion/restoration figures for 2050 calculated using the

same methodology as that in Review of the South West

Biodiversity, BRERC, March 2006 9 , a full description of the

methodology can be found in this document. The 2015 figure

is derived by assuming a linear rate of increase and dividing the

2050 figure by 8.

Method 2

The Review of the South West Biodiversity gives restoration/

expansion targets for both 2015 and 2030 for the region

for habitats not mapped on South West Nature Map. The

percentage of habitat occurring in Cornwall was calculated

and the 2030 aspirational target was calculated using the same

proportion as for the region. The target for 2015 was created

by averaging the 2010 target and the 2020 aspirational target

Method 3

No relevant data exists to produce targets for these habitats.

Therefore it should be ensured that these BAP habitats are

maintained until further information is available and future

targets can be set.

It should be noted that these targets are not prescriptive; they

are an indication of the scale of local contributions that are

needed to deliver regional and national targets. No targets

have been set for marine habitats or habitats without any

current baseline data; this is something that will need to be

addressed at the next 5 year review using the information

gained from the mapping projects outlined in this document.



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