This layer represents <b>24 Sentinel Lakes</b> that are being used for long-term monitoring under the<b> Sustaining Lakes in a Changing Environment (SLICE)</b> Program. Beginning in 2013 (Phase 2), lakes are classified into two tiers representing two levels of monitoring intensity: Tier 1 (intensive) and Tier 2 (reduced). Lake polygons are linked to Fact Sheets (all lakes) and Status Reports (some lakes). In ArcMap, select a lake using the Identify tool to display hotlinks to these PDFs. , The purpose of the SLICE program is to monitor and model Minnesota lake ecosystems for the detection and better understanding of the effects of environmental stressors in order to guide management that sustains fisheries and water resources for future generations. For more information, status/trend plots, and related partner investigations, see the <b>SLICE website</b> at: http://www.dnr.state.mn.us/fisheries/slice/index.html, Re-delineations and edits are frequent and occur as needed. See the attributes DELINEATON_DATE and DELINEATION_SRC for date and source of each polygon. See CONTENT_DATE for last date of attribute updates.