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\begin{document}

%-------------------------------------------------------------------

\section*{Overexploitation}

\hypertarget{contents}{}\section*{{Contents}}\label{contents}

\noindent\hyperlink{contents}{Contents}\dotfill \pageref*{contents} \linebreak
\noindent\hyperlink{idea}{Idea}\dotfill \pageref*{idea} \linebreak
\noindent\hyperlink{details}{Details}\dotfill \pageref*{details} \linebreak
\noindent\hyperlink{references}{References}\dotfill \pageref*{references} \linebreak


\hypertarget{idea}{}\subsection*{{Idea}}\label{idea}

\textbf{Overexploitation}, also called \textbf{overharvesting}, occurs when a renewable resource is exploited to the point of diminishing returns. Examples include wild plants, grazing pastures, fish stocks, forests and water aquifers. Sustained overexploitation can lead to the destruction of the resource. In particular, species may be driven to [[extinction]].

\hypertarget{details}{}\subsection*{{Details}}\label{details}

Scheffer writes that:

\begin{quote}%
Consumption can lead to alternative \href{Attractor}{attractors} in a plant population (or more generally, exploited population). As more food is available, animals may respond numerically (by reproducing more) but also functionally (by eating more).


\end{quote}
where the consumption can be modeled by the Monod equation,

\begin{displaymath}
cons = g\frac{A}{A+H}
\end{displaymath}
where $g$ food consumption and $A$ is food density, $H$ the half-saturation constant. Or the sigmoidal Hill equation for more intense consumption, $p$ is an integer and $p \ge 1$:

\begin{displaymath}
cons = g\frac{A^p}{A^p+H^p}
\end{displaymath}
\hypertarget{references}{}\section*{{References}}\label{references}

\begin{itemize}%
\item \href{http://en.wikipedia.org/wiki/Overexploitation}{Overexploitation}, Wikipedia.


\item Marten Scheffer, \emph{Critical Transitions in Nature and Society}, ch.2.2 and appendix A.3



\end{itemize}
category: ecology

[[!redirects overexploitation]] [[!redirects overharvesting]]



\end{document}