Appendix A. A list of the names of the community types used in the selection of occurrences of highly ranked communities in Michigan, USA.

A list of the names of the community types used in the selection of occurrences of highly ranked communities in Michigan, USA

Appendix C. A map of Michigan's land cover ca. 1800.

A map of Michigan's land cover ca. 1800

Appendix E. A table showing the results of two correlation analyses of conservation value across 1900 Michigan townships, determined using the species richness and species occurrences in five groups of potential indicators.

A table showing the results of two correlation analyses of conservation value across 1900 Michigan townships, determined using the species richness and species occurrences in five groups of potential indicators

Appendix F. A table of results from a principal-components analysis of the number of occurrences of potential indicator species in 924 townships in Michigan.

A table of results from a principal-components analysis of the number of occurrences of potential indicator species in 924 townships in Michigan

Appendix B. A table of land and vegetation cover types used in creating geographic information system data layers of Michigan's land cover ca. 1800 and a coverage of unchanged vegetation.

A table of land and vegetation cover types used in creating geographic information system data layers of Michigan's land cover ca. 1800 and a coverage of unchanged vegetation

Appendix D. A map of Michigan's unchanged land cover ca. 1800.

A map of Michigan's unchanged land cover ca. 1800

Supplement 2. Five geographic information system layers specifying the size and location of areas of high conservation value that were used in this study.

<h2>File List</h2><blockquote> <p><a href="supplement2.zip">supplement2.zip</a> </p> </blockquote><h2>Description</h2><blockquote> <p>supplement2.zip<br> Compressed archive file containing five GIS datasets, unch_wetland.e00, unch_forest.e00, natareas24_p.e00, nat_comm.e00, all_areas.e00</p> <p>unch_wetland.e00<br> Contiguous wetlands in Michigan that are larger than 100 hectares and are of the same wetland type present in the Government Land Office surveys of the 1800s. Data format is ESRI polygon coverage in an ESRI interchange file. Geographic projection is Michigan Georef, NAD 83, meters.</p> <p>unch_forest.e00<br> Contiguous forests in Michigan that are larger than 100 hectares and are of the same forest type present in the Government Land Office surveys of the 1800s. Data format is ESRI polygon coverage in an ESRI interchange file. Geographic projection is Michigan Georef, NAD 83, meters.</p> <p>natareas24_p.e00<br> State of Michigan designated State Natural Areas. Data format is ESRI polygon coverage in an ESRI interchange file. Geographic projection is Michigan Georef, NAD 83, meters.</p> <p>nat_comm.e00<br> Natural communities from the Michigan Natural Features Inventory natural heritage database. Data format is ESRI polygon coverage in an ESRI interchange file. Geographic projection is Michigan Georef, NAD 83, meters. </p> <p>all_areas.e00<br> All preceding data sets, unch_wetland.e00, unch_forest.e00, natareas24_p.e00 and nat_comm.e00 merged into one data set. Data format is ESRI polygon coverage in an ESRI interchange file. Geographic projection is Michigan Georef, NAD 83, meters.</p> </blockquote

Supplement 1. Two geographic information system data layers showing Michigan's land cover ca. 1800 and unchanged land cover ca. 1980.

<h2>File List</h2><blockquote> <p><a href="supplement1.zip">supplement1.zip</a></p> <p> </p> </blockquote><h2>Description</h2><blockquote> <p>Supplement1.zip is the compressed archival file containing two GIS data sets, lu1800.e00 and unch_veg.e00. </p> <p> lu1800 is the land cover of Michigan as interpreted from the survey notes of the Government Land Office (GLO) surveys of the 1800s. Data format is an ESRI polygon coverage in interchange format. Geographic projection is Michigan Georef, NAD 83, meters. </p> <p> unch_veg.e00 is the current Michigan vegetation that is of a similar vegetation type as present in the same location during the GLO surveys of the 1800s. Data type is an ESRI polygon coverage in interchange format. Geographic projection is Michigan Georef, NAD 83, meters.</p> </blockquote