Exploration in Classifying Ponds and Small Lakes Into Natural Communities in Michigan
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Exploration in classifying ponds and small lakes into natural communities in Michigan Prepared by: Amy Derosier Michigan Natural Features Inventory P.O. Box 30444 Lansing, MI 48909-7944 For: Michigan Department of Natural Resources Wildlife Division Report Number 2008-20 ___________________________________________________________ Small Lakes as Natural Communities i Suggested citation: Derosier, A.L. 2008. Exploration of classifying small lakes into natural communities in Michigan. Report number MNFI 2008-20. Michigan Natural Features Inventory, Lansing MI. Copyright 2008 Michigan State Board of Trustees Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, marital status, or family status. Cover photos (by): top left Doyle Lake (Amy L. Derosier); top right, Ready Lake (Brett Alger); bottom left Condon Lake (Amy L. Derosier); bottom right Lodge Lake (Melanie Weber). Small Lakes as Natural Communities ii TABLE OF CONTENTS TABLE OF CONTENTS .........................................................................................................................................III LIST OF TABLES.................................................................................................................................................... IV LIST OF FIGURES.................................................................................................................................................. IV LIST OF APPENDICES.......................................................................................................................................... IV INTRODUCTION .......................................................................................................................................................5 SUMMARY OF OTHER STATE’S LAKE NATURAL COMMUNITY CLASSIFICATIONS.........................6 LAKE CLASSIFICATIONS PROPOSED IN MICHIGAN ......................................................................................................9 METHODS...................................................................................................................................................................9 CLASSIFICATION OF PONDS AND LAKES ..................................................................................................................10 Limitations .........................................................................................................................................................11 FIELD METHODS......................................................................................................................................................11 RESULTS...................................................................................................................................................................11 DISCUSSION.............................................................................................................................................................15 DISCUSSION.............................................................................................................................................................16 PROPOSED DRAFT FRAMEWORK FOR EO SPECIFICATIONS .................................................................16 PROPOSED DRAFT EO RANK SPECIFICATIONS...........................................................................................16 FUTURE DIRECTIONS ...............................................................................................................................................18 PROPOSED DRAFT POND AND SMALL LAKE NATURAL COMMUNITY TYPES..................................18 ECOLOGICAL DRAINAGE UNITS...............................................................................................................................18 LANDSCAPE-LEVEL TYPES .......................................................................................................................................20 NATURAL COMMUNITIES (FIELD-BASED).................................................................................................................20 GLOSSARY ...............................................................................................................................................................21 DEFINITIONS MODIFIED FROM ARMANTROUT 1998.................................................................................21 ACKNOWLEDGEMENTS ......................................................................................................................................21 REFERENCES ..........................................................................................................................................................21 Small Lakes as Natural Communities iii LIST OF TABLES Table 1. Size, location, and classification parameters of lakes sampled. Ha is size of lake in hectares. Connection denotes how the lake is connected to a stream network: headwater only has a outflow stream, riverine has an inflow and outflow stream, and unconnected doesn’t have any stream connections.........................................................................................................................................12 LIST OF FIGURES Figure 1. Locations of small lakes sampled……………………………………………………. 15 Figure 2. Variation in alkalinity; 0 = no connections, 1 = headwater lake; 2 = riverine lake….. 15 Figure 3: Ecological Drainage Units and Major Watersheds of Michigan……………………...20 LIST OF APPENDICES A. List of variables used in multivariate analysis. B. Draft EO and Rank Specifications for Lakes. C. Site descriptions of ponds and small lakes sampled in state game areas. D. Site descriptions of ponds and small lakes sampled in state park and recreation areas. E. Site descriptions of ponds and small lakes sampled in state and national forests. Small Lakes as Natural Communities iv INTRODUCTION Protecting aquatic biological diversity in Small lakes provide a variety of services towards Michigan depends heavily on our ability to the preservation of biodiversity. They are likely protect representative and unique habitats or to reflect extremes of certain key environmental ecosystems. The state is moving towards variables, such as pH and alkalinity (J. Breck, preserving ecosystem functions rather than pers. comm.), providing unique ecosystems and individual threatened or endangered species to communities. Small lakes have been shown to preserve biological diversity as seen in the act as refugia for native species susceptible to state’s Wildlife Action Plan (Eagle et al. 2005). declines from human alterations (e.g., Mwanja Currently, terrestrial and wetland natural 2001). Michigan has a variety of species that are communities are tracked in the Michigan at the edge of their range. These “edge of range” Natural Features Inventory (MNFI) Biotics populations have the potential to be genetically database, which aids in protecting high quality different than the central populations and are natural communities or ecosystems through therefore important for maintaining and environmental review and other conservation conserving the genetic diversity of species and planning efforts. However, Michigan does not providing opportunities for evolutionary yet have fully aquatic natural communities processes (Lescia and Allendorf 1995, Nielson, defined or described. To preserve the full Scott, and Aycrigg 2001). breadth of Michigan’s biodiversity, representative habitats or ecosystems need to be There is some recent evidence to show that described and located for aquatic ecosystems. small lakes, especially small isolated lakes, contribute disproportionately to biodiversity In Michigan, most of the state’s listed as (Scheffer et al. 2006) often ‘containing endangered or threatened aquatic species occur specialized flora and fauna which are not in rivers and therefore rivers are considered and represented in other habitats (Bratton 1990, protected much more than lakes in the Williams et al. 1998, Williams et al. 2003). environmental review process and other Ponds and small lakes are often dominated by conservation planning efforts. Inland lakes make vegetation and this can lead to a higher diversity up a large portion of Michigan’s water bodies in many animal groups, including use of small and biodiversity and are ecosystems that need to lakes by bird species. As mentioned previously, be highlighted as such. There are 5,356 lakes ponds and small lakes are often more subject to between 4 and 40 acres in Michigan, which winter anoxia and if isolated may be fishless. accounts for 82% of Michigan lakes; yet, only Fishless lakes support greater diversity of 0.7% of them are sampled for fish every year by zooplankton, macro-invertebrates, water birds, the MDNR (Hayes et al. 2003). Small lakes and amphibians (Hunter et al. 1986, Havas and generally do not provide significant boating Rosseland 1995, Hecnar and McLoskey 1997). opportunities or public boat launches, and can Fishless lakes also tend to be dominated by therefore often be entirely privately owned vegetation. Hence, the current conservation and/or difficult to access. As such, small lakes emphasis on ‘preserving large habitat elements are often not targeted for stocking, management, and promoting connectivity thru maintenance of or monitoring efforts. However, these habitat corridors’ may actually represent a threat characteristics