Description: Ranking of Lakes for the purpose of enabling the prioritisation of resources to manage the current ecological values. This featureclass should be used in conjunction with other Northland Biodiversity Ranking data and in consultation with the Spatial data notes for Northland Biodiversity Ranking August 2018 (Obj Ref A1105191), Soil Types lris data dictionary (Obj Ref A1105672) and associated report "A classification of New Zealands terrestrial ecosystems by N J Singers and G M Rogers (Obj Ref A1105681).Rankings for lakes are described in a polygon shapefile (NorthlandLakeRanks.shp) that wascreated by overlaying a polygon layer delineating lakes greater than 1 ha in extent onto thelake ranking raster layer (NorthlandLakeRanks.tif) and calculating summary statistics for gridcells falling within each lake. Fields within the associated data table are as follows:a. ObjectID – a unique numeric identifier;b. LID – the lake identifier derived from the FENZ lake dataset;c. Name – the lake name where available;d. LakeAreaHa – the lake extent in ha;e. Geomorphic – the FENZ geomorphic classification group to which the lake isassigned;f. Condition – the estimated lake condition (from FENZ) with values ranging between 0(very poor condition) and 1 (very high condition);g. EcolRegion – the Ecological Region within which the lake is predominantly located –note that a small area near Mangawhai, located within the Auckland ER, wasamalgamated with the Eastern Northland ER for this analysis;h. RankMean – the average ranking, calculated by overlaying the polygons onto thecontinuous lake ranking layer;i. RankMin – the minimum (or highest) ranking occurring within the polygon,calculated as for RankMean;j. RankMax – the maximum (or lowest) ranking occurring within the polygon,calculated as for RankMean;k. RankOrder – the integer numerical rank of lakes, with values ranking from 1 (highestrank) to 295 (lowest rank);l. CumArea – the cumulative area of lakes (ha) when sorted into rank order;m. CumAreaPC – cumulative area of lakes when sorted into rank order, expressed as apercentage of all lakes.
Service Item Id: 3ef13dfaabdc4d19a913a07e7aa89d96
Copyright Text: Under contract to Northland Regional Council:
John Leathwick DSc
Conservation Science Consultant
Date: 24 August 2018
Description: Ranking of rivers and streams for the purpose of enabling the prioritisation of resources to manage the current ecological values. This featureclass should be used in conjunction with other Northland Biodiversity Ranking data and in consultation with the Spatial data notes for Northland Biodiversity Ranking August 2018 (Obj Ref A1105191), Soil Types lris data dictionary (Obj Ref A1105672) and associated report "A classification of New Zealands terrestrial ecosystems by N J Singers and G M Rogers (Obj Ref A1105681).Rankings for all river and stream segments were created by overlaying a buffered set of river network lineworkonto the river ranking raster layer(Northland Biodiversity Ranking - River Ranks)and calculating summarystatistics for grid cells located along each river segment. Fields within the associated datatable are as follows:a. Objectid – a unique numeric indicator;b. NZSegment – a unique numeric indicator derived from NIWA’s REC2 database;c. NZReach_re – a unique numeric indicator derived from NIWA’s older REC database;d. RiverClass – the river ecosystem type, derived from the FENZ level 2 classification;e. Condition – the estimated ecological integrity or condition, with values rangingbetween 0 (very poor condition) and 1 (very high condition);f. LengthKm – the river or stream segment length in km;g. RankMean – the mean rank for the river or stream segment, with values rangingbetween 0 (highly ranked) and 1 (low ranked); the value for a particular riversegment indicates the proportion of all river segments by lengththat would need to be selected for that particular river segment to be included.
Service Item Id: 3ef13dfaabdc4d19a913a07e7aa89d96
Copyright Text: Under contract to Northland Regional Council:
John Leathwick DSc
Conservation Science Consultant
Date: 24 August 2018
Description: The top 5% of additional sites identified from the hierarchical ranking, i.e., those that would make the largest additional gains, if managed, assuming that management is also applied to the top30% polygons from the fully integrated ranking. This featureclass should be used in conjunction with other Northland Biodiversity Ranking data and in consultation with the Spatial data notes for Northland Biodiversity Ranking August 2018 (Obj Ref A1105191), Soil Types lris data dictionary (Obj Ref A1105672) and associated report "A classification of New Zealands terrestrial ecosystems by N J Singers and G M Rogers (Obj Ref A1105681).Fields within the associated data table areas follows:o Id – a unique numeric identifier with values ranging between 1 and 2370;o ExentHa – the polygon extent in hectares;o RankMean – the average ranking, calculated by overlaying the polygons onto theraster layer from the additional terrestrial ranking analysis and calculating summarystatistics for grid cells falling within each polygon; values range between 0.3 and0.35 and indicate for any particular site the total proportion of all terrestrial sitesthat would be included for that site to be selected, assuming that the top 30% ofsites are also selected;o RankMin – the minimum (or highest) ranking occurring within the polygon,calculated as for RankMean;o RankMax – the maximum (or lowest) ranking occurring within the polygon,calculated as for RankMean.
Service Item Id: 3ef13dfaabdc4d19a913a07e7aa89d96
Copyright Text: Under contract to Northland Regional Council:
John Leathwick DSc
Conservation Science Consultant
Date: 24 August 2018
Description: This layer describes terrestrial habitat values and identifies the High priority terrestrial sites, i.e., those comprising 30% of surviving indigenous-dominatedecosystems or 10.6% of the Northland Region.This was generated by identifying all rastercells in NorthlandTerrestrialRanks.tif having values in the range 0–0.3, and delineating theseinto polygons. Polygons lying within 250 m of each other were amalgamated to form multipartpolygons, and any polygons of less than 1 ha in extent were deleted. This featureclass should be used in conjunction with other Northland Biodiversity Ranking data and in consultation with the Spatial data notes for Northland Biodiversity Ranking August 2018 (Obj Ref A1105191), Soil Types lris data dictionary (Obj Ref A1105672) and associated report "A classification of New Zealands terrestrial ecosystems by N J Singers and G M Rogers (Obj Ref A1105681).Fields within theassociated data table are as follows:a. Id – a unique numerical identifier in the range 1–1293;b. AreaHa – the polygon extent in hectares;c. RankMean – the average ranking, calculated by overlaying the polygons onto thecontinuous terrestrial ranking layer and calculating summary statistics for grid cellsfalling within each polygon;d. RankMin – the minimum (orhighest) ranking occurring within the polygon,calculated as for RankMean;e. RankMax – the maximum (or lowest) ranking occurring within the polygon,calculated as for RankMean;f. Name – a text name – these are provided only for polygons with an extent greaterthan 1000 ha, or for those having mean rankings that place them within the top 10%of sites and an extent greater than 100 ha.
Service Item Id: 3ef13dfaabdc4d19a913a07e7aa89d96
Copyright Text: Under contract to Northland Regional Council:
John Leathwick DSc
Conservation Science Consultant
Date: 24 August 2018