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Leslie K. Lueckenhoff

Publications and source records attributed to Leslie K. Lueckenhoff.

2 recordsLinked to original sources

A template for integrated ecological restoration planning, implementation, and monitoring: Case study from the Little Saint Francis River Chat Pile mining site

We present here a template for integrated ecological restoration planning and monitoring, using a case study from the Little Saint Francis River chat pile restoration site in Madison County, Missouri, USA. We used US Department of Agriculture Ecological Site Descriptions (ESDs) to identify a range of potential target vegetation communities given the site's biophysical setting. Preliminary site inspection allowed qualitative assessment of current vegetation condition in relation to potential ESD community types and identification of broad restoration goals (for example, “restore woodlands”). By examining the results of the site assessment with ESD descriptions, we identified specific and achievable objectives for those goals as well as relevant metrics for monitoring vegetation change through time. Pre-restoration vegetation sampling enabled refinement of objectives and quantified conditions against which to assess change as restorations mature. Because the sampling methods were adopted to address the specific objectives for the restoration, they continue to provide the framework for monitoring vegetation changes following restoration implementation. Herein we describe how this approach was applied in each of the broad community types encountered at the Little Saint Francis River site, relating pre-restoration species abundance measures to abundance values typical of community types associated with each ESD. In so doing, we demonstrate an iterative, data-driven process that can be applied to restoration planning and monitoring in many ecological systems and restoration contexts.

Missouri↗

Chronic effects of metal releases from historical mining on threatened crayfish in Madison County Missouri, USA

The Little St. Francis River and its tributaries drain metals-contaminated areas of the Madison County Mines National Priority List Superfund site (MCM) which was designated in 2003 to facilitate remediation of metals contamination within the MCM. One concern for natural resource trustees in the MCM is the potential effects of elevated metals concentrations on the federally threatened St. Francis River crayfish, Faxonius quadruncus , which has a geographic range that is limited to the St. Francis River watershed. A survey of riffle-dwelling crayfish, in-situ cage study, and laboratory toxicity tests were conducted to assess the effects of mining-derived metals on F. quadruncus and other crayfish species in the MCM. Crayfish densities were significantly greater at sites upstream of metals releases from historical mining (henceforth mining releases) compared to densities at sites downstream of mining releases, and metals concentrations in whole-body crayfish, surface water, sediments, macroinvertebrates, fish, and plant material were greater at sites downstream of mining releases compared to sites upstream of mining releases. Crayfish densities were also negatively correlated with consensus-based adverse effects indices, expressed as surface-water toxic units and sediment probable effects quotients. Decreased growth and increased mortality during cage and laboratory studies were likely due to exposure to, and subsequently uptake of, elevated concentrations of metals. Crayfish in all studies were found to bioaccumulate metals, which supports their utility as bioindicators of metals contamination. Study results show that elevated metals concentrations associated with mining releases in the MCM continue to adversely affect biota, including the federally threatened F. quadruncus .

Missouri↗