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educational opportunity for all users. The Minnesota Department of Natural Resources could potentially assist in reintroduction programs. The authors of this report have identified other plant species not included in "Minnesota's St. Croix River Valley and Anoka Sandplain: a Guide to Native Habitats" in the Trott Brook Corridor. These species identified are due to regional variability or human influence and shown in Appendix 1. Along with the species identified, Trott Brook also has invasive and nonnative species. . Reed canary grass (Phalaris arundinacea), a nonnative species, is prominently found in the willow swamp areas of Trott Brook. This grass, originally planted to improve the quality of forage in pasture land, indicates a disturbed site. The grass is an aggressive plant that flourishes in disturbed areas such as the Trott Brook willow swamps. Prickly ash (Zanthoxylum americanum) is an invasive species also indicative of disturbed sites (W ovcha et aI., 1995) Purple loosestrife (Lythrum salicaria), another invasive nonnative species, was not found in the Trott Brook Corridor. Soils Development of the Trott Brook Corridor will require consideration of the soil data to better use the resource. Soil characteristics indicate the suitability of the arefl for development. Other landscape factors such as depth to water table, slope, and hillslope position are important for suitability assessment. This information was adapted from the Anoka County Soil Survey, 1977. Trott Brook is located on the Anoka Sandplain, which covers over 310,000 acres in the seven county Metro Region. The Trott Brook Corridor is estimated by the authors of this report to cover 2,000 acres. Two major soil associations comprise the majority of soils found in the Trott Brook Corridor. These are the Hubbard-Nymore and Zimmerman-Isanti-Lino associations. Several additional soil series are also present. The Hubbard-Nymore association, covering approximately 309 acres, is found along each end of the Trott Brook corridor and is characterized by stratified coarse and gravely sand. The Brook is bordered by the Mississippi River on the west and the Rum River on the east. These rivers, which flow at faster rates and higher volumes than Trott Brook, transport a higher volume and larger particle size sediment. The coarse textured Hubbard-Nymore soils were formed at these locations. The Hubbard and Nymore soil series are included in this association. The Hubbard soil series is a well drained coarse sand with moderate suitability for trail development. 6 I I I I I I I I I I I I I I I I I I I