f16589a9-1c6e-4e91-b683-d5018aed4b81 https://bison.usgs.gov/ipt/resource?r=indianauniv-hemlocks-under1000m2-2005-2013 F. Collin Hobbs Huntington University Assistant Professor

2303 College Avenue Huntington Indiana 46750 US

+1(260) 359-4201 chobbs@huntington.edu http://www.huntington.edu/Biology/Faculty/Collin-Hobbs/?terms=hobbs Annie Simpson US Geological Survey biologist & information scientist

12201 Sunrise Valley Drive, Mailstop 302 Reston Virginia 20192 US

+1(703)648-4281 asimpson@usgs.gov http://www.usgs.gov F. Collin Hobbs Huntington University Assistant Professor

2303 College Avenue Huntington Indiana 46750 US

+1(260) 359-4201 chobbs@huntington.edu http://www.huntington.edu/Biology/Faculty/Collin-Hobbs/?terms=hobbs 2019-12-04 eng As part of a research thesis, aerial imagery for the state of Indiana was examined for evidence of eastern hemlock occurrences. The distribution of Tsuga canadensis in Indiana was reviewed using aerial imagery and followed up by selected ground truthing. This dataset shows locations of less than 1000m2 (non-solid stands). Based on images from 2005, locations randomly selected were visited on foot to verify the presence of the species, through 2013. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml plants Biocomplexity Thesaurus species land cover and land use null data.gov ecosystems community Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. The distribution of all smaller plots of hemlock within the state of Indiana in the United States. -87.301 -85.528 40.022 38.242 2005 2013 Tsuga canadensis (L.) Carrière -- eastern hemlock species Tsuga canadensis eastern hemlock notPlanned F. Collin Hobbs Huntington University Assistant Professor

2303 College Avenue Huntington Indiana 46750 US

+1(260) 359-4201 chobbs@huntington.edu http://www.huntington.edu/Biology/Faculty/Collin-Hobbs/?terms=hobbs visual analysis of shp files from 2005 aerial imagery determined the distribution of eastern hemlock in the state of Indiana. Field trips were taken to verify predicted presence of the trees in randomly selected areas throughout the state. Where polygons were less than 1000m2, a centroid was calculated and is represented in this dataset. A sister dataset of grids for hemlock tree distribution for polygons greater than 1000m2 is included separately. The study area was the entire state of Indiana, initially performed by referencing aerial imagery from 2005. The study included ground truthing visits and collecting samples from random plots through 2013. Some localities include a name of a DNR reference coordinate, collected by Hank Huffmann around 2007 (Consists of the county followed by a unique name for the site. Ex: "Lawrence-GuthieCreek"). All sites with "basis_of_record" as "specimen" will have a herbarium sample collected by F. Collin Hobbs associated with it. The majority of Charles Deam's historic herbarium samples are housed at Indiana University. Records that could be matched up with a degree of certainty to present day stands are referenced with the corresponding catalog number. R. R. Van Stockum's 1979 dissertation includes a record of his visits to eight sites in Indiana where Tsuga canadensis was found, and are referenced where applicable. The analysis of the aerial imagery for presence/absence of eastern hemlock was followed by physical visits to sites where hemlocks were expected. F. Collin Hobbs author State of Indiana, from aerial imagery and ground truthing. Aerial imagery for the state of Indiana was examined for evidence of eastern hemlock occurrences. Based on images from 2005, locations randomly selected were visited on foot to verify the presence of the species, through 2013. 2015-04-21T11:20:37.555-06:00 dataset Hobbs, F. Collin. 2013. The biogeography and phylogeography of disjunct eastern hemlock (Tsuga canadensis) populations. Indiana University Doctoral Thesis. Hobbs, F.C., Clay, K. 2015? Mapping plant distributions with multispectral aerial imagery: Tsuga canadensis as a case study. submitted. https://bison.usgs.gov/ipt/logo.do?r=indianauniv-hemlocks-under1000m2-2005-2013 not applicable http://www.bio.indiana.edu/faculty/facilities/herbarium.shtml Charles Deam driedAndPressed f16589a9-1c6e-4e91-b683-d5018aed4b81/v1.4.xml