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Full Name
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CLOCA Natural Heritage System
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Abstract
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The Natural Heritage System (NHS) for the watersheds within the Central Lake Ontario Conservation Authority (CLOCA) jurisdiction has been developed in three parts. The first part is referred to as the Functional Natural Heritage System (FNHS) is a series of shapefile overlays, as developed in ArcGIS, of valued natural system components. Those components are described in detail in Part 1. Many of these components have been derived from CLOCA's Ecological Land Classification (ELC) mapping, a provincial standard in classifying and mapping natural communities, developed by the Ministry of Natural Resources & Forestry (MNRF) in 1998. CLOCA's ELC mapping has been completed to the Community Series level of detail, which is defined as the smallest ecological unit of mapping (0.5 ha) that can be interpreted from aerial photography at a scale of 1:10 000. For the purposes of ELC mapping and subsequently the development of a Natural Heritage System, polygons under 0.5 ha have not been mapped unless they have been ground-truthed and have been included as a rare community type (i.e. Old Growth Forest, Fen). Occasional gaps within the corridors that do not represent existing natural heritage features, are necessary to connect habitat patches, which are required to support and maintain a connected natural system.
The second part in developing the Natural Heritage System is determining where additional natural cover should occur adjacent to the FNHS, in order to achieve watershed health targets. CLOCA adapted the Targeted Terrestrial Natural Heritage System (TTNHS) as developed by the Toronto Region Conservation Authority (TRCA), to reflect local conditions for CLOCA watersheds. The methodology for the TTNHS is appended and includes the methodology for Landscape Analysis Model (LAM) which evaluates habitat patches based on their size, shape, and proximity to other natural features. The information presented from the LAM, forms the basis of the TTNHS. In addition to generating a TTNHS for the CLOCA jurisdiction, additional manual edits are considered (Part 3); edits include the removal of small stand alone features with little functional value (i.e. small hedgerows). These edits can be assisted by Greenbelt and Recharge/Discharge mapping. The final product of this exercise is the NHS.
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Feature Type
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Polygon
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Location
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CLOCA_INFO
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Feature Dataset
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CLOCA_INFO.PREVIEW.NHS_Ultimate
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Geographic Extent
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CLOCA Watershed
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Maintenance Status
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As Needed
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Horizontal Datum
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North American Datum 1983
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Vertical Datum
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Spatial Projection
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NAD83/UTM Zone 17N
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Access Constraint
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CLOCA Open Data Licence v1
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Use Constraint
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None - in accordance with licence agreement
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Citation
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Produced using information under License with the Central Lake Ontario Conservation Authority, © Central Lake Ontario Conservation Authority, 20** (**Insert year of publication of IP)
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Agency Originator
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Central Lake Ontario Conservation Authority
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Agency Distributor
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Central Lake Ontario Conservation Authority
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Online Linkage
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https://open-data.cloca.com/datasets/d7df0dacba2849c6b75b149a5d35356b_14
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Methodology
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See Related Documents
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Supplimental Info
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Related Documents
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Related Records
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