Plant Communities
Common dominant trees utilized by Indiana bat throughout its range include oaks (Quercus spp.), hickories (Carya spp.), ashes (Fraxinus spp.), elms (Ulmus spp.), eastern cottonwoods (Populus deltoides), locusts (Robinia spp.), and maples (Acer spp.). The understory may include hawthorns (Crataegus spp.), dogwoods (Cornus spp.), fragrant sumac (Rhus aromatica), giant ragweed (Ambrosia trifida), sedges (Carex spp.), Virginia creeper (Parthenocissus quinquefolia), wood nettle (Laportea canadensis), goldenrod (Solidago spp.), poison-ivy (Toxicodendron radicans), and wild grape (Vitis spp.).
Indiana bats were found in a variety of plant associations in a southern Iowa study. Riparian areas were dominated by eastern cottonwood, hackberry (Celtis occidentalis), and silver maple (Acer saccharinum). In the forested floodplains, the dominant plants included black walnut (Juglans nigra), silver maple, American elm (Ulmus americana), and eastern cottonwood. In undisturbed upland forest, the most common plants were black oak (Quercus velutina), bur oak (Q. macrocarpa), shagbark hickory (Carya ovata), and bitternut hickory (C. cordiformis). Black walnut, American basswood, American elm, and bur oak dominated other upland Indiana bat sites.
There are at least 29 tree species that Indiana bats use during the summer. The greatest number of tree species are found in the central portion of Indiana bats's range (primarily Missouri, southern Illinois, southern Indiana, and Kentucky), but this is likely because the majority of research conducted on the species has occurred in this region. Roost trees from these central states, which are mainly in the oak-hickory cover type, include silver maple, red maple (Acer rubrum), sugar maple (A. saccharum), white oak (Q. alba), red oak (Q. rubra), pin oak (Q. palustris), scarlet oak (Q. coccinea), post oak (Q. stellata), shingle oak (Q. imbricaria), eastern cottonwood, shagbark hickory, bitternut hickory, mockernut hickory (C. alba), pignut hickory (C. glabra), American elm, slippery elm (Ulmus rubra), honey locust (Gleditsia triacanthos), sourwood (Oxydendrum arboreum), green ash (Fraxinus pennsylvanica), white ash (F. americana), Virginia pine (Pinus virginiana), American sycamore (Platanus occidentalis), and sassafras (Sassafras albidum). In southern Michigan and northern Indiana, which are mainly in the oak-hickory and elm-ash-cottonwood cover types, trees utilized as roosts include green, white, and black ash (Fraxinus nigra), silver maple, shagbark hickory, and American elm. And finally, in the southern areas of the Indiana bat's range (primarily Tennessee, Arkansas, and northern Alabama), which include the oak-hickory and oak-pine cover types, Indiana bats utilize shagbark hickory, white oak, red oak, pitch pine (P. rigida), shortleaf pine (P. echinata), loblolly pine (P. taeda), sweet birch (Betula lenta), and eastern hemlock (Tsuga canadensis).
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