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RARE SPECIES <br />According to the DNR natural heritage database, there are no rare species recorded on the <br />William H. Houlton Conservation Area. However, there were three elements recorded <br />within five miles of the site. The closest element of occurrence exists about 0.6 miles to the <br />east in the Mississippi River. There, surveys found Ligumia recta, or the black sandshell <br />mussel, a species of special concern in Minnesota. Further to the east and southeast <br />(roughly 3.5 to 4.2 miles from the property border), remnants of the native plant <br />communities Dry Sand Gravel Oak Savanna (UPs14b), a state -threaten nt community, <br />and Dry Barrens Oak Savanna (Ups14a2) occurred. The Dry Sand -G el anna was last <br />observed in 1989 and had a "fair" estimated viability, while the D ens Oak Savanna <br />was observed in 1989 and had a "poor" estimated viability. Th el read as follows: <br />"Pin and bur oak dry sand savanna. Parklike canopy do <br />and Quercus macrocarpa (DBH 2O-30cm) with occasio <br />approximately 25%: Zanthoxylum americanum, Ju <br />and Rubus occip. Ground cover dominated by dis <br />intermis, Agropyron repens and a few Linaria vulgaris, <br />and Achillea millefolium." <br />This description could be similar to the <br />land at the site - minus the non -native. - <br />historically savanna - then called "oak c <br />description as indicative of w <br />Although there may not <br />potentially be harbore4 <br />nature and disturbed hi <br />Habitat loss and d ad, <br />the subsectio <br />species aff ed. The p <br />it an im nt potentia <br />recomme bilizing <br />by managing i*ne <br />savanna and pr <br />native prairie to <br />opportunities to i <br />rub layer <br />9-Poa <br />na, Corylus+fimericana, <br />pratensis, Bromus <br />incana, Verbena stricta <br />is now agricultural <br />ies within what was <br />- lending support to this <br />ed on the property. <br />Conservation Need (SGCN) that could <br />Conservation Area, due to its more urban <br />i habitat is still a priority for this plan. <br />m the primary causes of problems for SGCN species in <br />.a, and grassland currently containing the most <br />on at the confluence of two water bodies also makes <br />itat For myriad plant and animal species. The DNR <br />increasing SGCN populations in oak savanna and prairie areas <br />s, using prescribed fire and other practices to maintain <br />courage restoration efforts, to manage grasslands adjacent to <br />habitat, and to provide technical assistance and protection <br />A individuals and organizations. <br />Friends of the Mississippi <br />NEI <br />W.H. Houlton Conservation Area NRMP <br />