Displaying 1 - 6 of 6 records found.
Title | Type |
|---|---|
Australian Rangelands Model | Model |
| This model tells a story of resilience of a rangeland system in Australia. Anderies et al. (2002) provides the following overview of the model. "We developed a stylized mathematical model to explore the effects of physical, ecological, and economic factors on the resilience of a managed fire-driven rangeland system. Depending on grazing pressure, the model exhibits one of three distinct configurations: a fire-dominated, grazing-dominated, or shrub-dominated rangeland system. Transaction costs... | 09 Aug 2016 |
Grazing, Fire, and Australian Rangeland Dynamics, New South Wales, Australia | Case |
| The ecology of savanna rangelands is the product of a dynamic interaction between grass, shrubs, fire and livestock, and a high variability in rainfall. Humans play an important role in these dynamics by raising livestock who graze, and by suppressing fire. The authors of this case explore the implications of these human activities for the resilience of the Australian rangelands, characterized by two main stable states. The first state is dominated by grasses with scattered trees and shrubs.... | 09 Aug 2016 |
Port Lameron Lobster Fishery II, Nova Scotia, Canada | Case |
| Since this original case, much of the Atlantic Canadian fisheries have been reduced to a fraction of historical levels. In Port Lameron, very few harvesters fish for groundfish (cod, haddock, pollock, hake), swordfish, or tuna. The collapse of the Codfishery has been attributed to many issues, including scientific uncertainty, government policies to increase employment in the area, and subsidies to increase fishing capacity, and the inability of enforcement to stop foreign trawlers from... | 09 Aug 2016 |
Pumpa Irrigation System | Model |
| In this case, the surface water level is modeled by a first order differential equation. There are six sections with equal area that are allocated water based on institutions that determine how long each sector receives water, and in what order. Water is allocated to a given sector by opening and closing gates along the irrigation canals. Based on these allocations, each sector maintains a crop yield depending on the amount of time that maintains their water level within the bounds of a desired... | 09 Aug 2016 |
Pumpa Irrigation System, Central region, Nepal | Case |
| The Pumpa Irrigation System draws water from the Pumpa river to serve approximately 120 households. It is a "north-south" system and is in an area with relatively steep terrain. This case was analyzed using a stylized dynamic model to assess its capacity to cope with new challenges from global change. The model suggested that the adaptive water allocation rules used by the community (sequential, 12 and 24 hour rotations) could significanty enhance the robustness of the system to increased... | 09 Aug 2016 |
The Alaskan Pollock Fishery, Bering Sea, USA | Case |
| The Alaskan Pollock fishery has been described as a management success, largery attributed to the adoption of ITQs, with allocations to catchers, processers, and to Alaskan communities. The processor-fisher relationship seems key to the current success at reducing effort in the fishery. Quota is split among catcher-vessels (45%), catcher processer vessels (36%), motherships (9%), and community development quota groups (10%). There is a much smaller number of boats fishing than before... | 09 Aug 2016 |