GCN - Strategic Opportunity Areas (Hertfordshire)

This dataset identifies areas where the addition of new ponds would benefit Great Crested Newt populations.

The core areas contain a pond density of 2+ (i.e. there are 2+ ponds within 250m of any 25m square) where great crested newt presence has been predicted.

Fringe areas contain a pond density of <2 (i.e. there are fewer than 2 ponds within 250m of any 25m square) where great crested newt presence has been predicted or are within a 250m of a Core Area.

Higher scores are associated with darker colouration and represent a greater presence of suitable habitat features:

distance from rivers 50 - 1000m
arable density 50 - 100%
urban denity 40 - 100%
grassland density 5 - 50%
distrance from woodland < 100m
distance to nearest pond 0 - 150m

These suitable habitat features have been given a score of ‘1’.

distance from rivers 50 - 1000m
grassland density 5 - 50%
distrance from woodland < 100m
distance to nearest pond 0 - 150m

These suitable habitat features have been given a score of ‘-1’.

arable density 50 - 100%
urban denity 40 - 100%
Urban areas greater than 2ha (+400m buffer), roads (7.5m), rivers (7.5m) and Environment Agency Flood Zone 2 have been excluded. Attribution statement: © Natural England, 2023
Based upon LCM2015 © NERC (CEH) 2011. Contains Ordnance Survey data © Crown Copyright 2007.
Based upon LCM2015 © NERC (CEH) 2017. Contains Ordnance Survey data © Crown Copyright 2007, Licence number 100017572.
Contains data supplied by Natural Environment Research Council © NERC (Centre for Ecology & Hydrology) and © Natural England.
Soils Data © Cranfield University (NSRI) and for the Controller of HMSO 2019. Based upon LCM2007 © NERC (CEH) 2011. Contains Ordnance Survey data © Crown Copyright 2007. © third party licensors. Contains, or is derived from, information supplied by the Ordnance Survey and Rural Payments Agency. © Crown copyright and database rights 2019.
© Freshwater Habitats Trust, PondNet monitoring scheme 2018
© Contains Ordnance Survey data © Crown copyright and database right, 2020 © Hertfordshire County Council © Crown copyright and database rights 2020 Ordnance Survey
100019606 © St Albans City & District Council © Crown copyright and database rights 2021 Ordnance Survey
100018953 © Three Rivers District Council © Crown copyright and database rights 2021 Ordnance Survey
100018686 © Welwyn Hatfield Borough Council © Crown copyright and database rights 2021 Ordnance Survey
100019547 © Broxbourne Borough Council © Crown copyright and database rights 2021 © Dacorum Borough Council, 2021; © East Herts Council, 2021; © Hertsmere Borough Council, 2021; © Stevenage Borough Council, 2021; © Watford Borough Council, 2021
Contains, or is derived from, information supplied by Ordnance Survey. © Crown copyright and database rights 2020 Ordnance Survey 100022021.
Contains Ordnance Survey data © Crown copyright and database right, 2020

本数据集旨在识别增设新池塘将对大斑蟾蜍种群有益的区域。核心区域内的池塘密度为2+（即任意25平方米方格内距离不超过250米处均有2个或以上池塘），其中大斑蟾蜍的存在已被预测。边缘区域内的池塘密度小于2（即任意25平方米方格内距离不超过250米处少于2个池塘），其中大斑蟾蜍的存在已被预测或位于核心区域250米范围内。更高的评分与更深的颜色相关联，代表着适宜栖息地特征的更高密集度：
- 离河流距离50 - 1000米
- 耕地密度50 - 100%
- 城市密度40 - 100%
- 草地密度5 - 50%
- 离林地距离 < 100米
- 离最近池塘的距离 0 - 150米
上述适宜栖息地特征被赋予评分‘1’。
- 离河流距离50 - 1000米
- 草地密度5 - 50%
- 离林地距离 < 100米
- 离最近池塘的距离 0 - 150米
上述适宜栖息地特征被赋予评分‘-1’。
耕地密度50 - 100%，城市密度40 - 100%，面积大于2公顷的城市地区（+400米缓冲区）、道路（7.5米）、河流（7.5米）以及环境署洪水区2已被排除。版权声明：© 英国自然英格兰，2023。基于LCM2015 © NERC（CEH）2011。包含测量局数据 © 英国王室版权2007。基于LCM2015 © NERC（CEH）2017。包含测量局数据 © 英国王室版权2007，许可证号100017572。包含由自然环境研究委员会 © NERC（生态与水文中心）和 © 英国自然英格兰提供的数据。土壤数据 © 克兰菲尔德大学（NSRI）和 © 英国政府出版物监管局2019。基于LCM2007 © NERC（CEH）2011。包含测量局数据 © 英国王室版权2007。© 第三方许可商。包含或源自测量局和乡村支付署提供的信息。© 英国王室版权和数据库权利2019。© 淡水生境信托，PondNet 监测计划2018。© 包含测量局数据 © 英国王室版权和数据库权利，2020 © 赫特福德郡议会 © 英国王室版权和数据库权利2020测量局。100019606 © 斯特奥尔班斯市及地区议会 © 英国王室版权和数据库权利2021测量局。100018953 © 三河地区议会 © 英国王室版权和数据库权利2021测量局。100018686 © 韦林汉普顿自治市议会 © 英国王室版权和数据库权利2021测量局。100019547 © 布罗克斯伯恩自治市议会 © 英王国版权和数据库权利2021 © 达科姆自治市议会，2021；© 东北赫特福德郡议会，2021；© 赫特斯米尔自治市议会，2021；© 斯蒂文尼奇自治市议会，2021；© 华特福德自治市议会，2021。包含或源自测量局提供的信息。© 英国王室版权和数据库权利2020测量局100022021。包含测量局数据 © 英国王室版权和数据库权利，2020。