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In addition to supporting microbial and metazoan production, the process of leaf litter decomposition can alter the chemical and physical environment of aquatic systems \cite{Gessner_1999}. Leaf leachates provide bioavailable organic nutrients \cite{McConnell_1968,Duan_2014} and have been shown to increase total phosphorus \cite{Feh_2015b}, and total nitrogen \cite{Feh_2015} concentration in overlying water. Mineralization of leaf organic matter by microbial or animal consumers, will result in the release of inorganic nutrients and CO\textsubscript{2} \cite{CITE}. Typically, however, the stoichometric imbalance between microbial consumers and detritus means that leaves are sites of net immobilization of inorganic nitrogen and phosphorus \cite{CITE}. The mineralization of organic carbon in the leaves creates a demand for oxygen \cite{CITE} that can lower dissolved oxygen concentrations in water overlying decomposing leaf litter \cite{Hodkinson_1975,Rubbo_2008,Mehring_2014,Feh_2015b}.  In this study we evaluate the effect that leaf litter subsidies have on nutrient cycling and sediment oxygen demand in the sediments of a small man--made pond.\blindtext  We hypothesize that leaf litter will \begin{enumerate*} \item 1)  increase sediment oxygen demand, \item 2)  increase DOC concentration and bioavaliablity, and \item 3)  decrease the flux of DIN and DIP from the sediments.\end{enumerate*} \blindtext