Areas with controlled access, as Marine Protected Areas (MPAs) and Territorial Use Rights for Fisheries (TURF), are conceived as tools to contribute to the ecosystem conservation and fisheries sustainability. Management and Exploitation Areas for Benthic Resources (MEABR), a TURF system implemented in Chile, offers the opportunity to test this hypothesis. The management in these areas is based mainly on the assessment of the resources population status, with low or no consideration of the ecological - environmental effects that condition their productivity. In this study, we evaluate ecological trophic dynamics of the rocky subtidal community configuration in four periods along 20 years of the highly productive Choros Island MEABR – MPA, including one pre-implementation period. In this TURF, the carnivore gastropod Concholepas concholepas (locally known as “loco”) is the main targeted resource. The performance of ecosystem indexes of this TURF increased during the MEABR regime as compared with the pre MEABR implementation. Nevertheless, the most conspicuous increase occurred in 2013, primarily in response to changes in environmental conditions and their direct and indirect effects on community interactions. The analysis of interactions between guilds indicated that the main drivers were the interaction between the primary productivity, prey abundance and the top predator loco. This produces a long-term dynamic of the system modulated by the interplay of environmental variability, which at benthic community level increases prey populations thus sustaining increased loco productivity. In turn, intensified predation of loco reduces its prey. This produces natural productivity fluctuations, which counteract the expected outcome of management actions, impeding to achieve stable landings in the long term.

被认为是海洋保护区（MPA）和渔业领土使用权（TURF）等受控通道的区域被视为有助于生态系统保护和渔业可持续发展的工具。底特律资源管理和开发区（MEABR）是智利实施的TURF系统，为检验这一假设提供了机会。这些地区的管理主要基于对资源人口状况的评估，很少或根本没有考虑限制其生产力的生态-环境影响。在这项研究中，我们评估了高产的Choros Island MEABR – MPA沿20年的四个时期（包括一个预实施时期）的四个阶段的岩石潮下群落结构的生态营养动力学。在这个TURF中，食肉动物腹足动物孔雀草（在当地称为“火车头”）是主要的目标资源。与之前的MEABR实施相比，该TURF的生态系统指标的性能在MEABR制度期间有所提高。然而，最明显的增长发生在2013年，主要是由于环境条件的变化及其对社区互动的直接和间接影响。对行会之间互动的分析表明，主要驱动力是主要生产力，猎物数量和顶级捕食者机车之间的相互作用。这产生了由环境可变性相互作用调节的系统的长期动态，在底栖群落水平上增加了猎物种群，从而维持了机车生产率的提高。反过来，机车的强化捕食会减少其猎物。