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M.L. 2013 Project Abstract for the Period Ending June 30, 2016 PROJECT TITLE: Sustaining Lakes in a Changing Environment - Phase II PROJECT MANAGER: Jeffrey R

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M.L. 2013 Project Abstract for the Period Ending June 30, 2016 PROJECT TITLE: Sustaining Lakes in a Changing Environment - Phase II PROJECT MANAGER: Jeffrey R M.L. 2013 Project Abstract For the Period Ending June 30, 2016 PROJECT TITLE: Sustaining Lakes in a Changing Environment - Phase II PROJECT MANAGER: Jeffrey R. Reed, Research Scientist II AFFILIATION: Minnesota Dept. Natural Resources, Division of Fish and Wildlife, Fisheries Research & Policy Unit MAILING ADDRESS: 23070 North Lakeshore Drive CITY/STATE/ZIP: Glenwood, MN, 56334 PHONE: 320-634-7330 E‐MAIL: [email protected] WEBSITE: http://www.dnr.state.mn.us/fisheries/management/research.html FUNDING SOURCE: Environment and Natural Resources Trust Fund LEGAL CITATION: M.L. 2013, Chp. 52, Sec. 2, Subd. 05a APPROPRIATION AMOUNT: $1,200,000 Overall Project Outcome and Results Phase 2 of the Sentinel Lakes Long-Term Monitoring Program comprised a wide variety of monitoring and research activities on the 25 Sentinel Lakes selected to provide representation of Minnesota’s major lake-types. During 2013-2016, the Sentinel Lakes Program continued to integrate the activities of key, collaborative agencies and partners (e.g. DNR, MPCA, USGS, and universities) which focus on determining the effects of large-scale ecological stressors (e.g., eutrophication, invasive species, and climate changes) on lake ecosystems. Highlights include: Detailed summaries of fish and aquatic plant sampling activities were prepared to guide future data analyses and monitoring activities. High-resolution water column temperature and dissolved oxygen tracking reveals progression of oxythermal-habitat changes for important fish species in Elk Lake. Continuation of specialized sampling of Cisco population in 3 Sentinel Lakes further enhanced our understanding of the relationships between Cisco and climate change and the presence of invasive species. Evaluations of biological indicators of lake status including pupal skins of aquatic midges, and White Sucker biology. Results indicate aquatic fly composition reflects lake nutrient status, while assessing White Sucker biology proved difficult. At least 141 species of midge were detected. A detailed report of phytoplankton and zooplankton composition, seasonal cycling, and interactions in 13 Sentinel Lakes was completed. Food web research conducted to understand impacts of zebra mussels finds that lake biota (insects and fish) shifted to alternative food sources. Long-term water quality and baseline aquatic plant surveys at Shaokotan Lake detected a major shift in 2015 from algae-dominance to clear water, aquatic plant-dominance due to watershed restoration and BMP implementation. New biophysical lake models were developed Pearl and Madison lakes, while previous models were used to simulate impacts of future climate conditions in Elk and Trout lakes. Surface water temperatures increase dramatically under future climate scenarios and oxygen depletion dynamics differed between lakes. Project Results Use and Dissemination The information gathered during the second phase of Sentinel Lakes sampling continues to provide insights useful to lake managers. The continued ability to collect water quality, zooplankton, fisheries, aquatic vegetation, and land use data over consecutive years from a set suite of lakes has added to the strong foundation of long-term monitoring that was established during the first phase of the project (2009 to 2013). Refining metrics and more fully developing our understanding of how they react to specific ecological stressors will continue to assist managers faced with developing management strategies and practices in lakes. The value to fisheries and lake managers is perhaps most evident in the Department of Natural Resource’s commitment to hire and fund a full-time Sentinel Lakes coordinator position. That internally funded position was filled in May of 2016 and will provide project continuity going forward. As was the case in Phase 1 we again included partner institutions with different areas of expertise, thus the project was able to gain valuable insights into 1) how lake systems in agricultural zones function (USGS), 2) how Chironomid (midge) populations may serve as important indicators of trophic status (University of Minnesota), and 3) how stable isotope analysis can lead to fuller understanding of the effects invasive species such as zebra mussels have on lake food webs (University of St. Thomas). The techniques developed by partners as well as their final results should provide valuable tools and information for some time to come. Continued, consecutive, sampling of Cisco populations has not only furthered our understanding of their population dynamics and their vulnerability to climate change and invasive species but has also added to the development of specific methods for monitoring this important climate- and land-use sensitive species in lakes across the state. Finally, the project has become an excellent training tool for undergraduates, graduate students, and professionals. More than a dozen undergraduates have been able to gain valuable field experience and mentoring from research staff over the course of the project. The project has also served as a valuable entry point into fisheries for early-career professionals. Much of the focus of disseminating information gathered during the project has been focused on a scientific audience but with an emphasis on making that information relevant to lake and fisheries managers. To that end, all collaborators past and present were invited to attend and present their findings at a Sentinel Lakes Summit which was held in Brainerd in 2015. Over 50 managers from DNR and PCA attended the event. A similar event is being planned for 2017. Additionally, a number of manuscripts covering a wide variety of topics are currently being prepared for submission to peer- reviewed publications. Already a number of presentations have been made at national, regional, and state-level professional meetings. For general audiences the Department of Natural Resources maintains a series of Sentinel Lakes-related pages on their website (http://www.dnr.state.mn.us/fisheries/slice/index.html) and the Pollution Control Agency hosts Sentinel Lake Assessment reports on their website (https://www.pca.state.mn.us/water/sentinel-lakes). Sustaining Lakes in a Changing Environment (SLICE): Phase 2 Trust Fund 2013 Work Program Final Report Date of Status Update: September 8, 2016 Date of Next Status Update Report: Final Report Date of Work Plan Approval: June 25, 2013 Project Completion Date: June 30, 2016 PROJECT TITLE: Sustaining Lakes in a Changing Environment (SLICE): Phase 2 Project Manager: Jeffrey R. Reed, Research Scientist II Affiliation: Minnesota Dept. Natural Resources, Division of Fish and Wildlife, Fisheries Research & Policy Unit Mailing Address: 23070 North Lakeshore Drive City/State/Zip Code: Glenwood, MN, 56334 Telephone Number: (320) 634‐7330 Email Address: [email protected] Web Address: http://www.dnr.state.mn.us/fisheries/management/research.html Location: Statewide. See map in Section IX. Total ENRTF Project Budget: ENRTF Appropriation: $1,200,000 Amount Spent: $1,197,454 Balance: $2,546 Legal Citation: M.L. 2013, Chp. 52, Sec. 2, Subd. 05a Appropriation Language: $1,200,000 the first year is from the trust fund to the commissioner of natural resources in cooperation with the United States Geological Survey, the University of Minnesota, and the University of St. Thomas to continue development and implementation of monitoring, modeling, and reporting protocols for Minnesota lakes to be used in water and fisheries management. This appropriation is available until June 30, 2016, by which time the project must be completed and final products delivered. 1 Sustaining Lakes in a Changing Environment (SLICE): Phase 2 I. PROJECT TITLE: Sustaining Lakes in a Changing Environment (SLICE): Phase 2 II. PROJECT STATEMENT: As Minnesota’s population grows, increased demands are being placed on our resources. Hunting and fishing related activities fuel $3.6 billion in annual expenditures and a vibrant Minnesota economy demands on effective and efficient lake habitat and fisheries conservation. Thanks to the initial investments from the ENTF, multiple partners’ in‐kind contributions, and motivated citizen volunteers, DNR Fisheries successfully launched and is near completion of a 4‐yr pilot effort in 24 sentinel lakes (SLICE Phase 1). Sentinel systems are specific ecosystems (in this case lakes) chosen for focused monitoring in order to better capture important changes or trends through time, and to give us the information to better understand the mechanisms to explain those changes. Thus, in Phase 1, we have established a suite of 24 lakes across Minnesota that capture the full breadth of the basic conditions (e.g. fertility, climate) that shape our lake resources, and in large part determine the goods and services (e.g. fishing and water recreation) that our lakes provide for our citizenry. Phase 1 identified baseline conditions in a wide variety of Minnesota lake types, their initial responses to various environmental stressors, and outlined some expectations for future conditions given various changing scenarios. Phase 1 also fortuitously (and perhaps unfortunately) gave us the opportunity to set up a rigorous system to understand pending impacts from zebra mussels following the invasion of this pest in Lake Carlos, near Alexandria, in 2009. Phase 1 will be completed in June 2013. Phase 2 (2013 ‐ 2016), proposed here, will take lessons learned from the first phase to develop and implement rigorous monitoring, modeling, and reporting protocols
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