Metadata: DNR Hydrography - Lakes with Fish-based IBI Scores (Most Recent IBI Survey)

DNR Hydrography - Lakes with Fish-based IBI Scores (Most Recent IBI Survey)

This page last updated: 08/18/2017
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
  1. Overview
  2. Data Quality
  3. Data Organization
  4. Coordinate System
  5. Attributes
  6. Distribution - Get Data
  7. Metadata Reference

Section 1: Overview

Originator:DNR Division of Fish & Wildlife - Fisheries Unit

Title: DNR Hydrography - Lakes with Fish-based IBI Scores (Most Recent IBI Survey)

Abstract: This layer shows the Fish IBI (Index of Biotic Integrity) Scores for MN lakes as calculated by DNR Fisheries. Scores range from 0-100, with higher scores indicating higher biotic integrity. Attributes correspond to the most recent IBI survey for each lake.

An IBI (Index of Biotic Integrity) is a biologically-based, multi-metric method for measuring the integrity of aquatic systems. Minnesota DNR Fisheries Research has developed a fish-based lake IBI that incorporates fish data collected by various methods (trap nets, gill nets, shoreline seines, and backpack electrofishing units) into 8-15 metrics in three categories: species richness, community assemblage, and trophic composition (see Section 5: Attributes). Each metric represents an aspect of the biological assemblage structure, function, or other measurable characteristic that changes in some predictable way with increased human-induced stress. Fish IBI scores respond to differences in land use patterns, trophic state, and aquatic vegetation.

Validation studies indicate that the fish-based lake IBI scores function as a measure of fish community response to human disturbance across a gradient of lakes. Continuing work by DNR Fisheries will expand the application of this IBI to more lake types and will validate this tool as a viable method for assessing lake impairment as part of Minnesota's 303(d) Impaired Waters assessments. These scores should be considered as 'preliminary' and are subject to change as the IBI tools are further developed and refined. This dataset only includes lakes over 100 acres and within lake classes 20-43, with few exceptions for lakes very close to 100 acres. Additional scores will be added to this dataset annually.

For more reference information, see (Section 5: Attributes -- Detailed Citation).

Related table: fsh_ibi_all_surveys
IBI scores for additional years can be found in this table.

To access related table records:
  • Open the layer attribute table and select a lake polygon record

  • From the Related Table dropdown (2nd icon on bar just above table), choose table Lake IBI Scores: To IBI Scores - All Surveys

  • The related table will open and the corresponding records for the selected lake will be highlighted.

  • Note: You can also select records from the related table and find the lakes that correspond to those records by reversing the process above (i.e., Choose Related Tables dropdown (2nd icon), choose table Lake IBI Scores: Back to IBI Lakes)


  • You can also access scores from all years by clicking on the lake of interest with the Identify Tool and expanding the related tabular information.

    Purpose: This layer provides a visual representation of Fish IBI scores to help assess and monitor the condition of Minnesota lakes, and for the purposes of planning, mapping and spatial/temporal analysis. For each lake, the status of the most recent Fish IBI score is displayed by color; scores from previous years can be accessed through the related table (see tips above).

    Time Period of Content Date: 05/16/2019

    Currentness Reference: Re-delineations and edits are frequent and occur as needed.

    Progress: In work

    Maintenance and Update Frequency: Annually

    Spatial Extent of Data: Statewide

    Bounding Coordinates: -97.23
    -89.53
    49.37
    43.5

    Place Keywords: Minnesota, border waters

    Theme Keywords: Hydrography, Water, Lakes, Inland Waters, IBI, Index of Biotic Integrity, metrics, clean water, WRAPS

    Theme Keyword Thesaurus:

    Access Constraints: None

    Use Constraints: None

    Contact Person Information: Lyn Bergquist, GIS Data Contact
    Minnesota DNR - Fisheries Unit
    500 Lafayette Rd
    Saint Paul, MN  55155
    Phone: 651-259-5189
    Email: lyn.bergquist@state.mn.us

    Browse Graphic: Click to view a data sample.


    Associated Data Sets: DNR Lakes and Open Water

    Section 2: Data Quality

    Attribute Accuracy:

    Logical Consistency:

    Completeness: Data exist statewide, excluding lake classes 1-19 in far northeastern MN. Lakes < 100 acres are also excluded.

    Horizontal Positional Accuracy: Polygons have been improved by on-screen digitizing over DOQ and FSA imagery.

    Vertical Positional Accuracy: N/A

    Lineage: The lake polygons are derived from the Open Water feature class of the DNR Hydrography SDE Dataset. See metadata for DNR Water Features for more detail.

    Section 3: Spatial Data Organization (not used in this metadata)


    Section 4: Coordinate System

    Horizontal Coordinate Scheme: Universal Transverse Mercator

    UTM Zone Number: 15

    Horizontal Datum: NAD83

    Horizontal Units: meters

    Vertical Datum: not applicable

    Vertical Units: Not Applicable

    Depth Datum: not applicable

    Depth Units: Not Applicable

    Section 5: Attributes

    Overview: env_ibi_lakes_fisheries (feature class attribute table): The first set of attributes (DNR_HYDRO_ID through WATERSHED) are derived from and consistent with the Open Water feature class of the DNR Hydrography SDE Dataset. See DNR Hydrography - All Water Features The remaining attributes are specific to this layer. This layer shows the most recent IBI score for each lake

    fsh_ibi_all_surveys (related table):
    Attributes are the same as for the GIS polygon layer, except that the related table shows all IBI scores(all years) for each lake

    Detailed Citation: For more detailed information about the fish-based IBI and IBI metrics, consult the following sources:

    Bacigalupi, Jacquelyn, 2014. Fish-Based IBI Development for Minnesota Lakes & Use in the Watershed Assessment Process – Status Report. Minnesota Department of Natural Resources Report
    Contact: Jacquelyn Bacigalupi, MNDNR Lake IBI Coordinator, Jacquelyn.bacigalupi@state.mn.us, 218-833-8613


    Drake M. T. and D.L. Pereira, 2002. Development of a Fish-Based Index of Biotic Integrity for Small Inland Lakes in Central Minnesota. North American Journal of Fisheries Management 22:1105-1123.
    Contact: Melissa Drake, MNDNR Fisheries Research Supervisor, melissa.drake@state.mn.us (651)259-5246

    Drake, M., and R. Valley. 2005. Validation and Application of a Fish-based Index of Biotic Integrity for Small Central Minnesota lakes. North American Journal of Fisheries Management 25:1095-1111.

    Schupp D.H. 1992. An Ecological Classification of Minnesota Lakes with Associated Fish Communities. Minnesota Department of Natural Resources Investigational Report 417: 27pp.
    http://files.dnr.state.mn.us/publications/fisheries/investigational_reports/417.pdf

    Table Detail:
    env_ibi_lakes_fisheries - feature class table (DNR Fisheries)
    Field NameValid ValuesDefinitionDefinition Source
    DNR_HYDRO_ID1 to 35000Unique GIS record number of waterbody features in DNR Hydrography SDE - Open Water FeaturesDNR Fisheries
    FW_IDenumeratedA unique Fisheries Waterbody ID for joining/linking polygons to DNR Fisheries Lake Survey DB (Oracle). FW_IDs are assigned based on how the waterbody is managed by DNR Fisheries (i.e., an FW_ID may correspond to an entire basin '00' or to a specific sub-basin '01','02',etc.DNR Fisheries
    1-18000A valid Fisheries Waterbody IDDNR FIsheries Lake Survey DB
    88888A "dummy" Fisheries Waterbody ID representing an alternate representation of a basin (implemented in SDE Dataset only)
    99999A "dummy" Fisheries Waterbody ID representing a non-MN portion of a border water
    DOWLKNUM
    -
    Waterbody ID per DNR Ecological and Water Resources (EWR) Division's LAKESDB database; the DOWLKNUM may end in"00" (entire basin) or "01","02", etc. (sub-basin)DNR EWR LAKESDB
    PW_BASIN_NAME
    -
    Public Water (Lake) Name per DNR Ecological and Water Resources Division's LAKESDB databaseDNR EWR LAKESDB
    WATERSHED
    -
    The Major Watershed (HUC 8) name for the given waterbody
    ACRES
    -
    Surface area of waterbody in acresESRI auto-calculated
    SHORE_MI
    -
    Perimeter of shoreline in miles (includes island shoreline)ESRI auto-calculated
    CENTER_UTM_X
    -
    UTM Easting (X) of waterbody centerESRI auto-calculated
    CENTER_UTM_Y
    -
    UTM Northing (Y) of waterbody centerESRI auto-calculated
    DNR_REGIONenumeratedDNR Administrative Regionbdry_dnr_admin_regions.gdb\dnr_admin_regions
    1Northwest Region (Bemidji)
    2Northeast Region (Grand Rapids)
    3Central Region (St. Paul)
    4Southern Region (New Ulm)
    FSH_OFFICE
    -
    DNR Fisheries Administrative Areas (Fisheries Office)bdry_dnr_fisheries_admin.gdb\dnr_fisheries_admin
    ID
    -
    A unique ID for each IBI survey (matches original IBI database)DNR Fisheries IBI Database (J. Bacigalupi)
    SOURCEenumeratedSource of IBI Survey (DNR Unit that performed the Nearshore components of the FIBI survey)DNR Fisheries IBI Database (J. Bacigalupi)
    EWRDNR Ecological and Water Resources DivisionDNR Fisheries IBI Database (J. Bacigalupi)
    FisheriesDNR Ecological and Water Resources DivDNR Fisheries SectionDNR Fisheries IBI Database (J. Bacigalupi)
    YEARenumeratedYear of IBI SurveyDNR Fisheries IBI Database (J. Bacigalupi)
    1997-PresentNote: There were no IBI surveys in 2000, 2004
    SURVEY_DATEenumeratedDate of IBI SurveyDNR Fisheries IBI Database (J. Bacigalupi)
    6/6/1997 - present
    IBI_SCORE0 to 100A total score based on summation of 8 - 15 metrics (dependent upon FIBI Tool used). Higher IBI scores indicate better lake quality (as determined by watershed land use, trophic state and aquatic vegetation). Lake characteristics associated with higher IBI scores are low percent littoral area, high maximum depth, high Secchi depth transparency and high latitude.DNR Fisheries IBI Database (J. Bacigalupi)
    IBI_Tool
    -
    Indicates which IBI Tool was used to generate a score for the lake. The Tool is based on lake class and some are adjusted for lake size.DNR Fisheries IBI Database (J. Bacigalupi)
    Statusenumerated
    Below Impairment ThresholdBelow the Impairment Threshold for the FIBI Tool
    At or Above Impairment ThresholdAt or Above the Impairment Threshold for the FIBI Tool
    ExceptionalAbove an FIBI score such that the fish community is considered exceptional
    IBI_Score_ConditionsenumeratedFlag describing the double-checked accuracy of the FIBI scoreDNR Fisheries IBI Database (J. Bacigalupi)
    PreliminaryThis score has not been checked by multiple staff to confirm accuracy
    ConfirmedThis score has been checked by multiple staff to confirm accuracy
    Final for AssessmentThis score has been checked by multiple staff to confirm accuracy and has been considered during assessment
    Impairment_tresholdenumeratedThe impairment threshold value of the FIBI scoreDNR Fisheries IBI Database (J. Bacigalupi)
    45Impairment threshold for lakes scored with FIBI Tool 2
    38Impairment threshold for lakes scored with FIBI Tool 4
    24Impairment threshold for lakes scored with FIBI Tool 5
    36Impairment threshold for lakes scored with FIBI Tool 7
    Confidence_IntervalenumeratedThe 90% confidence interval determined using repeated surveysDNR Fisheries IBI Database (J. Bacigalupi)
    36-5490% Confidence Interval for lakes scored with FIBI Tool 2
    30-4690% Confidence Interval for lakes scored with FIBI Tool 4
    9-3990% Confidence Interval for lakes scored with FIBI Tool 5
    27-4590% Confidence Interval for lakes scored with FIBI Tool 7
    Percent_Diff_from_Impairment_Threshold-100 to 316.66666666The percent deviation from the impairment threshold value for that FIBI Tool (negitive indicates the score is below the threshold)DNR Fisheries IBI Database (J. Bacigalupi)
    Exceptional_FIBI_scoreenumeratedWhen the FIBI score is above this value the fish community is considered exceptionalDNR Fisheries IBI Database (J. Bacigalupi)
    64The exceptional value for lakes scored with FIBI Tool 2
    59The exceptional value for lakes scored with FIBI Tool 4
    NAThe FIBI score has not been determined where a fish community is considered exceptional for lakes scored with FIBI Tools 5 and 7
    Data_conditions
    -
    Describes any conditions with data quality or quantity, or limitations for useDNR Fisheries IBI Database (J. Bacigalupi)
    NUM_NAT_SP_RAW
    -
    Raw value: Number of Native Species. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_INT_SP_RAW
    -
    Raw value: Number of Intolerant Species. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_TOL_SP_RAW
    -
    Raw value: Number of Tolerant Species. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_INSTVR_RAW
    -
    Raw value: Number of Insectivores. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_OMNIV_RAW
    -
    Raw value: Number of Omnivores. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_CYPR_RAW
    -
    Raw value: Number of Cyprinids. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_SBD_RAW
    -
    Raw value: Number of Small Benthic Dwellers. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_VEGDW_RAW
    -
    Raw value: Number of Vegetation Dwellers. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_INT_NS_RAW
    -
    Raw value: Proportion of Intolerants in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_SBD_NS_RAW
    -
    Raw value: Proportion of Small Benthic Dwellers in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_VGD_NS_RAW
    -
    Raw value: Proportion of Vegetation Dwellers in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_INS_BM_RAW
    -
    Raw value: Proportion of Insectivore Biomass in Trapnet. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_OMV_BM_RAW
    -
    Raw value: Proportion of Omnivore Biomass in Trapnet. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_TOL_BM_RAW
    -
    Raw value: Proportion of Tolerant Biomass in Trapnet. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_CRV_BM_RAW
    -
    Raw value: Proportion of Carnivore Biomass in Gillnet. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_INT_BM_RAW
    -
    Raw value: Proportion of Intolerant fish species biomass in the Gillnet. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_NAT_SP
    -
    Metric Score: Number of Native Species. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_INT_SP
    -
    Metric Score: Number of Intolerant Species. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_TOL_SP
    -
    Metric Score: Number of Tolerant Species. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_INSTVR
    -
    Metric Score: Number of Insectivores. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_OMNIV
    -
    Metric Score: Number of Omnivores. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_CYPR
    -
    Metric Score: Number of Cyprinids. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_SBD
    -
    Metric Score: Number of Small Benthic Dwellers. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_VEGDW
    -
    Metric Score: Number of Vegetation Dwellers. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_INT_NS
    -
    Metric Score: Proportion of Intolerants in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_SBD_NS
    -
    Metric Score: Proportion of Small Benthic Dwellers in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_VGD_NS
    -
    Metric Score: Proportion of Vegetation Dwellers in Nearshore. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_INS_BM
    -
    Metric Score: Proportion of Insectivore Biomass in Trapnet This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_OMV_BM
    -
    Metric Score: Proportion of Omnivore Biomass in Trapnet. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_TOL_BM
    -
    Metric Score: Proportion of Tolerant Biomass in Trapnet. This metric is (-) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PROP_CRV_BM
    -
    Metric Score: Proportion of Carnivore Biomass in Gillnet. This metric is (+) correlated with lake quality.DNR Fisheries IBI Database (J. Bacigalupi)
    PA_INT_BM
    -
    Metric Score: Presence or absence of intolerant fish species in the Gillnet. This metric is (+) correlated with lake quality. A two (2) indicates that intolerant species were sampled in the gill net. A zero (0) indicates that no intolerants were sampled, but there wasn't an expectation for them to be sampled. A negative one (-1) indicates that no intolerants were sampled and there was an expectation for them to have been sampled.DNR Fisheries IBI Database (J. Bacigalupi)
    NUM_IBI
    -
    Number of IBI surveys performed on this lake and in this layerDNR Fisheries IBI Database (J. Bacigalupi)
    MAX_DATEenumeratedFlag denoting whether an IBI survey is the most recent for a lake
    YIBI survey is the most recent survey
    NIBI survey is not the most recent survey
    MULT_IBI
    -
    An * indicates whether the lake has more than one IBI score. In ArcMap, click on a lake with the Identify Tool to access records from all years (related table).
    CONTENT_DATE
    -
    Date the layer-specific attributes were last updated
    DisplayenumeratedFlag denoting whether an IBI survey is the most recent or best survey data to display for a lakeDNR Fisheries IBI Database (J. Bacigalupi)
    NIBI survey is not the most recent or best survey data to display
    YIBI survey is the most recent or best survey data to display
    fsh_ibi_all_surveys - related table -- same attributes as above (DNR Fisheries)

    Section 6: Distribution

    Publisher: Minnesota DNR - Division of Fisheries

    Publication Date: 08/18/2017

    Contact Person Information: Zeb Thomas, GIS Data Systems Coordinator
    Minnesota Department of Natural Resources
    500 Lafayette Rd
    Saint Paul, MN  55155
    Phone: 651-259-5637
    Email: zeb.thomas@state.mn.us

    Distributor's Data Set Identifier: env_ibi_lakes_fisheries.gdb\env_ibi_lakes_fisheries

    Distribution Liability: Please read accompanying document: Minnesota DNR Data and Software License Agreement.pdf

    Ordering Instructions: Please visit the download page for this dataset on the Minnesota Geospatial Commons website using the web link below (Online Linkage).

    Online Linkage: I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

    Section 7: Metadata Reference

    Metadata Date: 08/18/2017

    Contact Person Information: Lyn Bergquist, GIS Data Contact
    Minnesota DNR - Fisheries Unit
    500 Lafayette Rd
    Saint Paul, MN  55155
    Phone: 651-259-5189
    Email: lyn.bergquist@state.mn.us

    Metadata Standard Name: Minnesota Geographic Metadata Guidelines

    Metadata Standard Version: 1.2



    This page last updated: 08/18/2017
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