Displaying 106 - 120 of 261 records found.
| Title | Type Created |
|---|---|
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... | 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 |
robustness and resilience across scales: migration and resource degradation in the prehistoric u.s. southwest | Case |
| migration is arguably one of the most important processes that link ecological and social systems across scales. humans (and other organisms) tend to move in pursuit of better resources (both social and environmental). such mobility may serve as a coping mechanism for short-term local-scale dilemmas and as a means of distributing organisms in relation to resources. movement also may be viewed as a shift to a larger scale; that is, while it may solve short-term local problems, it may... | 09 Aug 2016 |
the evolution of social norms in common property resource use | Case |
| the problem of extracting commonly owned renewable resources is examined within an evolutionary-game-theoretic framework. it is shown that cooperative behavior guided by norms of restraint and punishment may be stable in a well-defined sense against invasion by narrowly self-interested behavior. the resource-stock dynamics are integrated with the evolutionary-game dynamics. effects of changes in prices, technology, and social cohesion on extraction behavior and the long-run stock are analyzed.... | 09 Aug 2016 |
regime shifts in a socio-ecological model of farmland abandonment | Case |
| figueiredo & pereira (2011) developed a mathematical model with two-way linked socio-ecological dynamics to study farmland abandonment and to understand the regimes shifts of this socio-ecological system. the model considers that migration is a collective behavior socio-economically driven and that the ecosystem is dynamic. the model identifies equilibria that vary from mass migration, farmland abandonment, and forest regeneration, to no migration and forest eradication; partial migration... | 09 Aug 2016 |
the coupled dynamics of human socio-economic choice and lake water system: the interaction of two sources of nonlinearity | Case |
| suzuki & iwasa (2009) study a mathematical model for the coupled dynamics of human socio-economic choice and lake water system. in the model, many players choose one of the two options: a cooperative and costly option with low phosphorus discharge, and an economical option with high phosphorus discharge. the choice is affected by an economic cost, a social concern about water pollution, and a conformist tendency. the pollution level in the lake is determined by total phosphorus discharge by... | 09 Aug 2016 |
conflict between groups of players in coupled socio-economic and ecological dynamics | Case |
| conflict among multiple groups is a major source of difficulty in environmental conservation. people are often divided into various groups that have different social factors, sometimes leading to differences in the degree to which they cooperate in environmental conservation. this obstructs the social consensus needed to solve the environmental problems. here we study the coupled dynamics of human socio-economic choice and lake water pollution, and examine the magnitude of the difference in... | 09 Aug 2016 |
paradox of marine protected areas: suppression of fishing may cause species loss | Case |
| this is a placeholder case for the model for the same name. please revise case information to reflect the case study represented in the model. | 09 Aug 2016 |
tourists and traditional divers in a common fishing ground | Case |
| lee & iwasa (2011) study socio-ecological models for a fishing ground open to tourists. on jeju island, korea, women traditional divers called "haenyeo" harvest resources in a common fishing ground. to investigate the impact of introducing tourists on the benefit to the fishing association and the resource level, we examine two models that differ in the way the number of tourists is controlled. in the first model, the fishing association charges an entrance fee to tourists and the... | 09 Aug 2016 |
subtle global bifurcation with dramatic ecological consequences in a simple population model | Case |
| numerous situations exist in which a consumer uses two different kinds of resources, one fixed, the other renewable, e.g., nesting resources and food resources. with an elementary modification of the basic lotka-volterra consumer resource equations, we investigate the population dynamics of a consumer dependent on two resources, one fixed, the other renewable. emerging from this structure is a situation of alternative attractors that remain qualitatively robust over a significant range of... | 09 Aug 2016 |
the inevitability of surprise in agroecosystems | Case |
| many critical transformations of ecosystems contain advanced signals of their imminence, but it is also true that many critical transformations can be shown to contain no such signal, at least with the sorts of data normally available to field workers. this paper explores some generalized theoretical structures and distinguishes between those that may provide a signal that could be used to predict a critical transformation and those that, by their very nature, do not provide such a clue. i... | 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 |
kurnool-cuddapah canal large-scale irrigation system in andhra pradesh, south india | Case |
| the kurnool-cuddapah (kc) canal irrigation system draws water from tungabhadra river through the sunkesula dam on flows through cuddapah and kurnool districts in state of andhra pradesh in south india providing water to around 120,000 hectares and servicing around 250,000 farm households (check). it was originally built by the dutch for navigation purposes and later sold to the british and used for irrigation purposes. it was modernized somewhat around 1950s. the main canal is largely a "... | 09 Aug 2016 |
deulgaon forest community, gadchiroli district, maharashtra, india | Case |
| the deulgaon forest community is located approximately 18 km from the town of dhanora in the gadchiroli district of maharashtra, india. it encompasses a geographical area of 718.48 ha of which 601.37 ha are community forest. the case study involves an undetermined snapshot in time and catalogues an action situation involving 173 community members organized in 33 households which are dependent on the forest for fuelwood, fodder, timber, and wildlife resources. timber and forest products are the... | 09 Aug 2016 |
efficacy of consultation procedure as conflict management tool in northern sweden | Case |
| this forest resource is located in northern sweden and is used by two different user groups. the case study involves a snapshot in time and catalogues an action situation involving the native sami and their reindeer herding communities, and private logging compaines. the swedish parliament mandated that consultation meetings be held between a logging company and the effected sami group before forest logging commence, in an attempt to mitigate conflict. the institutional analysis document... | 09 Aug 2016 |