Skip to main content

<p>This strategy addresses the strong influence of plant community structure and composition on wetland ecological integrity and function, and outlines approaches that managers can take to resist climate change influences and build resilience into the sites that they manage through purposeful vegetation management. Wetland plant communities have evolved over millennia as dynamic systems that respond to a range of natural disturbance regimes (van der Valk 1981). Changes in precipitation and temperature regimes may push these plant communities outside of their natural range of variability, resulting in changes in plant community structure and composition (Johnson et al. 2005). For example, changing precipitation patterns and evapotranspiration rates are anticipated to decrease water levels in some wetlands, favoring woody species growth (Weltzin et al. 2003, Wisconsin Initiative on Climate Change Impacts [WICCI] 2010). In fire-dependent wetlands, wetter springs and prolonged droughts may present new challenges and opportunities for conducting prescribed burns (WICCI 2017), which can further influence community composition and structure. Increasingly frequent and intense floods may scour wetland substrates and vegetation, rendering them vulnerable to non-native invasives (WICCI 2010). Early spring warming, poor synchronization between seedling emergence and precipitation, and prolonged inundation may lead to seedling mortality and exhaustion of a wetland’s soil seed bank (WDNR 2010a, Walck et al. 2011). Increasing sedimentation associated with increasing precipitation and intense storm events can also bury wetland seed banks to the extent that native species are lost (Gleason et al. 2003, Peterson and Baldwin 2004). In identifying approaches that bolster wetland plant community structure, managers will need to consider tactics that reduce imbalances in species dominance (e.g., woody or invasive species encroachment) and altered microtopography. Approaches relating to plant community composition emphasize limiting invasive species while maintaining and promoting taxonomic and functional diversity of native species and seed banks that are adapted to current and future conditions. Applying fire where appropriate will further support efforts to achieve target community structure and composition. Managing for diverse wetland plant communities with intact structure will promote resistance to invasions (Funk et al. 2008), support vegetative flexibility as environmental conditions change (van der Valk and Pederson 1989), and provide habitat for broad suites of fish and wildlife species (WDNR 2015).&nbsp;</p>

Subscribe to Maintain and restore wetland vegetation