Institutions, the rules that govern interactions between people, evolve over time. This special issue presents a number of detailed case studies of human–environment interactions during a significant historical period. With social-ecological systems we mean a set of people, their natural and human-made resources, and the relationships among them (Anderies et al., 2004, Janssen et al., 2005).

Societies frequently generate public infrastructure and institutional arrangements in order to mediate short-term environmental fluctuations. However, the social and ecological consequences of activities dealing with short-term disturbances may increase the vulnerability of the system to infrequent events or to long-term change in patterns of short-term variability. Exploring this possibility requires the study of long-term, transformational change. The archaeological record provides many examples of long-term change, such as the Hohokam who occupied the Phoenix Basin for over a thousand years and developed a complex irrigation society. In the eleventh and fourteenth centuries, the Hohokam society experienced reductions in complexity and scale possibly associated with regional climatic events. We apply a framework designed to explore robustness in coupled social-ecological systems to the Hohokam Cultural Sequence. Based on this analysis, a stylized formal model is developed to explore the possibility that the success of the Hohokam irrigation system and associated social structure may have increased their vulnerability to rare climactic shocks.

The recent wave of subdivision of Maasai group ranches is not an isolated event, but rather part of a broader, historical process of transformation in land relations and policy development in Maasailand. Maasai have over time supported land privatization, first by formalizing collective rights in group ranches and more recently by individualizing collective land holdings. Privatization is perceived to be an effective strategy for safeguarding Maasai land claims against appropriation by non-Maasai, the government and elite Maasai. Construction of the Uganda railway in early twentieth century and the subsequent influx of European settlers who were granted individual title to secure their investments are events that began the institutional path of privatization. The persistence and dominance of individualized arrangements regardless of other more optimal property rights options is a result of the dominance of elite interests (supported by state institutions) even as state imposed institutions replaced Maasai customary systems of land allocation.

In this article, we look into the question whether the Dutch waterboards can still be considered resilient institutions, effectively adapting to changing circumstances as often described in literature. We argue that current waterboards resemble the CPR management form of old only in name. Their institutional nature has changed considerably, thus providing a challenge to the future of CPR water management in the Netherlands. We examine not only the implications for the institutional performance and future of the waterboard system but also discuss possible ways to regenerate the system. With respect to the latter (changes in), the system of governance and community base character of waterboards are examined.

The decline of agriculture in Taiwan has adversely affected the incentives of farmers and the government to engage in irrigation management. Despite that, Taiwan's irrigation systems have shown a high degree of robustness. This study seeks to understand how institutions have contributed to the robustness of Taiwanese irrigation. Conceptualizing an irrigation system as a social-ecological system (SES), this study examines the development and design of Taiwanese irrigation institutions, and how these institutions have enabled farmers and irrigation managers to cope with the dynamics in the SES, and hence contributed to the system's robustness.

The study has found that the robust systems are built upon institutions that allow effective coordination of the activities of a multitude of farmers, enhance the development and sustenance of a repertoire of ideas, and nest the problem-solving efforts of various scopes and scales in a complementary manner. The institutions enable individuals and organizations at different levels to engage in continuous learning and adaptation that, in turn, facilitates the systems' adaptation to the changing environment.

This paper examines the dynamism and robustness of two irrigation systems of the Kok River system within the Mekong River basin in northern Thailand in the context of changing governance mechanisms and evolution of technological and market forces. It analyzes both temporal and spatial dynamism of the irrigation systems. The temporal dynamism was analyzed over three phases: before intervention, initial operation, and long-term. The before intervention phase analysis examined the effect of various attributes of users on starting an irrigation system, whereas the initial operation phase inquiry included the process of development of rules and level of autonomy in developing the users' own rules over time. The long-term phase analysis focused on external factors affecting the sustainment of these irrigation systems. Spatial dynamism was examined across upstream and downstream systems and within different locations of the system. The analysis was centered on linkages and relationships between five entities: resource, resource users, public infrastructure, public infrastructure providers, and external disturbances. Both systems were still robust, owing to the sustainment of local customs and the role of local leaders still vital, albeit in different forms. The group efforts, their self-governing capabilities, and local institutions, including the changed role of leaders in dealing with external forces, have played an important role in maintaining the robustness of these systems.