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Element Occurrence Concepts Part 1

Element Occurrence Concepts Part 1. Jennifer Nichols Natural Heritage Methodology Training February 26, 2008. Element Occurrence Concepts Part 1. Definition, Relationships, Labels, and Specifications. Jennifer Nichols Natural Heritage Methodology Training February 26, 2008. Session Topics.

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Element Occurrence Concepts Part 1

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  1. Element Occurrence Concepts Part 1 Jennifer NicholsNatural Heritage Methodology TrainingFebruary 26, 2008

  2. Element Occurrence Concepts Part 1 Definition, Relationships, Labels, and Specifications Jennifer NicholsNatural Heritage Methodology TrainingFebruary 26, 2008

  3. Session Topics 1. Background and context 2. Definition of an EO 3. Relationships between EOs 4. Labels for EOs 5. EO specifications

  4. 1. Background and Context

  5. EO Data Standard • Methodology developed through the EO Design Project • Collaborative effort by a team comprised of central and heritage program staff • Project was established to improve the consistency and accuracy of EO data throughout the NatureServe network

  6. Is this an EO? • Red-cockaded woodpecker nesting in a tree on the edge of a golf course • Sighting of a black bear in suburban area • Dead black swamp snake • Deserted nest How many EOs are there? • Marshallia patches on different gravel bars along a river

  7. Issues with EO Delineation

  8. Importance of EOs • NatureServe uses Element Occurrences to define meaningful conservation units (e.g., populations, ecological assemblage) • To insure valid aggregation and analyses of EOs, information must be accurate and consistent • Accomplished through the use of standards for collecting and managing EO data

  9. 2. Definition of an EO

  10. Definition of an EO An Element Occurrence (EO) is an area of land and/or water in which a species or natural community is, or was present. An EO should have practical conservation value for the Element as evidenced by potential continued (or historical) presence and/or regular recurrence at a given location.

  11. Complete EO Definition 2.1 Principal EOs 2.2 Sub-EOs 2.3 Feature Descriptors 2.4 Location Use Classes 2.5 Persistence & Practical Conservation Value 2.6 Captivity / Cultivation 2.7 Anthropogenic Habitat 2.8 Reintroduction / Restoration 2.9 Introduction / Exotics 2.10 Historical EOs 2.11 Extirpation 2.12 Recordation and Representation

  12. 3. Relationships between EOs

  13. Principal EO • Developed from observations • SPECIES: Habitat or area observed to be occupied • ECOLOGICAL ELEMENTS: Observed area that contains a characteristic species composition and structure • Defined according to EO specs • Can contain other EOs

  14. But what if the principal EO is just a…? Indication whether the EO represents the full extent of area occupied by the Element at that location: CONFIDENCE EXTENT Y = Confident that EO represents the full extent N = Confident that EO does not represent the full extent ? = Uncertain whether EO represents the full extent

  15. Sub-EO • Located within a principal EO • Optional • Represents an area within the principal EO defined for some purpose: • Specific behavior or life history function • Differing composition, density, or quality • Discrete area based on significant data • Non-biological division

  16. EO record with Sub-EOs

  17. Sub-EO Record

  18. Ursus americanus – Black Bear Example: Using Principal and Sub-EOs

  19. Using Principal and Sub-EOs

  20. Using Principal and Sub-EOs

  21. Using Principal and Sub-EOs

  22. Using Principal and Sub-EOs

  23. Multi-jurisdictional EOs Management using principal and sub-EOs • Principal EO: • Use to represent entire extent • Record maintained by lead program • Sub-EOs: • Use to represent area within each jurisdiction • Records maintained by individual programs

  24. 4. Labels for EOs

  25. Source Feature Descriptor • Label describing what the EO is (e.g., nest, east patch, 10/2006 survey) • Optional • Very useful for • Principal EOs that do not represent the full extent of the Element (Confidence Extent = N or ?) • Sub-EOs

  26. Use of Source Feature Descriptor

  27. Location Use Class • Label used for EOs of migratory animals that occupy disjunct locations by season • Required • Identifies EOs by season of use • Used to insure that locations utilized at different seasons are considered for conservation

  28. breeding nonbreeding nesting area migratory stopover migratory corridor staging hibernaculum maternity colony bachelor colony freshwater estuarine marine adult foraging area juvenile foraging area calving area nursery area nonmigratory undetermined Recognized Classes

  29. Source Feature Descriptor Location Use Class

  30. Aimophila aestivalis – Bachman’s Sparrow Use of Location Use Class Labels

  31. Location Use Class?

  32. Location Use Classes

  33. 5. EO Specifications

  34. Purpose of EO Specifications Define and delineate valid EOs • Define what evidence constitutes valid EOs • SPECIES: Minimum size, quality, or persistence • ECOLOGICAL ELEMENTS: Minimum size • Delineate and differentiate EOs using: • Separation distances • Other factors (e.g., use of habitat, system characteristics)

  35. EO Specifications • Used to define principal EOs • Specs can be developed for groups of Elements: • SPECIES: Taxonomically related and/or ecologically similar species • ECOLOGICAL ELEMENTS: Elements related through classification and/or common occurrence pattern characteristics

  36. Basis for Separation Criteria • Dispersal distance • Home range • Spatial patterns of occurrence • Temporal patterns of occurrence

  37. Animal EO Specs Record Different specs written for different location use classes

  38. Plant EO Specs Record See Biotics Online Help file for documentation referenced in plant EO Specs record

  39. Ecology EO Specs Record

  40. Delineation of Species EOs • EOs are effectively separated by obstacles to movement or dispersal • ANIMALS: • Separation distance criteria provided for: • Unsuitable habitat • Suitable habitat not known to be occupied • Separate criteria are required for each location use class • PLANTS: Habitat-based delimitation guidance

  41. Animal EO Definition/Delineation • Data meet criteria for a valid EO • Separation distance for intervening area applied • 2 principal EOs • Physical barrier acts as separation • 3 principal EOs

  42. Habitat-based Plant EO Delimitation Guidance • Most plants utilize a decision tree based on habitat characteristics and distances between locations

  43. Delineation of Ecological EOs • EOs are effectively separated by areas that limit expansion of component species, or alter the function of processes within the occurrence • Separation guidance based on the characteristics of intervening areas and distances between locations will be used for most ecological Element occurrences

  44. Ecological Element Occurrence Delimitation Guidance (Currently under review)

  45. EOs: Learning More Summary version of methodology: http://www.natureserve.org/prodServices/biotics/BioticsDoc/Documents/Prep_for_Biotics.PDF Full version of methodology:http://www.natureserve.org/prodServices/eodata.jsp EO Concepts presentations: http://www.natureserve.org/prodServices/biotics/biotics-learn-more.jsp Contact: jennifer_nichols@natureserve.org Listserves: http://lists.natureserve.org/mailman/listinfo

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