This article reviews and analyzes the issues related to worldwide hypoxic zones and the
range of economic questions sorely in need of answers. We begin by describing the extent …

Currently, groundwater resources are under anthropogenic and natural pressures.
Depending on various factors, aquifers have diverse responses toward stresses. Resilience …

We analyze how the threat of a potential future regime shift affects optimal management. We
use a simple general growth model to analyze four cases that involve combinations of stock …

We study here optimal management of dynamic ecological systemsthat exhibit a
destabilizing positive feedback. The prototypeexample is that of a shallow lake in which …

Maintaining safe operating spaces for exploited natural systems in the face of uncertainty is
a key sustainability challenge. This challenge can be viewed as a problem in which human …

The purpose of this paper is to derive necessary conditions for optimal control in the
presence of threshold effects when the threshold is a curve in n-dimensional space of …

We consider a discrete-time version of the fish war model, where a regulator imposes a
moratorium on fishing activities whenever the stock reaches a predetermined critical low …

The purpose of this article is to contribute to the exploration of non-convex dynamics in
coupled human-nature systems. We study welfare issues associated with the management …

Eutrophication of water bodies is a common problem in many countries. Eutrophication
processes are guided by thresholds, which must be taken into account in the formulation of …

Nine planetary boundaries have been proposed, capturing essential biophysical processes
that sustain the Earth System and its biosphere in an accommodating state for humanity …