Coastal zones (CZ) are social-ecological systems where rapid forms of economic development are disrupting the existing patterns of relationships, raising challenges for governance. Institutional flexibility, broad participation, multilevel governance, and adaptability have been identified as critical conditions for the governance of social-ecological systems. While the importance of agency, through the substantive participation of private actors in rulemaking, has been researched, there is a need to examine the dynamics involved in, and consequence of, hybrid governance arrangements. An empirical study is presented of hybrid governance, involving federal and local government and locally based private actors from civil society organizations, environmental non-government organizations and local business interest associations, in the state of Quintana Roo, Mexico. The CZ of Quintana Roo is facing pressures from economic development, mainly tourism, with consequences for water pollution and fisheries. Through qualitative, mixed methods, we found that a thick network of private actors has mobilized to play an important role in environmental management and to act in collaboration with the State. Multiple rationales account for this development, including high levels of environmental awareness, particularly with respect to water pollution, while the lack of institutional capacity also motivates state actors to seek partnerships. While private governance is emerging, our data reveal a complex case, where private actor mobilization seeks to promote better regulations, to share data and resources, and to improve implementation capacity within the public administration. Hybrid governance contributes to effective environmental governance of the CZ. However, this can also risk state retreat from its public responsibilities.

沿海地区（CZ）是社会生态系统，经济的快速发展正在破坏现有的关系模式，给治理带来挑战。制度的灵活性，广泛的参与，多层次的治理和适应性已被确定为社会生态系统治理的关键条件。虽然已经研究了通过私人行为者的实质性参与来制定规则的重要性，但是有必要研究混合治理安排所涉及的动力及其结果。提出了关于混合治理的实证研究，涉及联邦和地方政府以及来自民间社会组织，环境非政府组织和地方企业利益协会的本地私人行为者，在墨西哥金塔纳罗奥州。金塔纳罗奥州的CZ面临着经济发展的压力，主要是旅游业，给水污染和渔业带来了后果。通过定性，混合的方法，我们发现已经动员了一个庞大的私人行为者网络，以在环境管理中发挥重要作用并与国家合作。这种发展有多种原因，包括高水平的环境意识，尤其是在水污染方面的意识，而缺乏机构能力也促使国家行为者寻求伙伴关系。在私人治理兴起的同时，我们的数据揭示了一个复杂的案例，在此案例中，动员私人行为者力求促进更好的法规，共享数据和资源以及提高公共行政部门的执行能力。混合治理有助于CZ的有效环境治理。但是，这也可能使国家有可能退出其公共责任。