are the studies on the assessment of the ecological effects of MPAs, such as:
Hockings Marc, 2003. Systems for assessing the effectiveness of management in protected areas. BioScience. 53, 823-832.
Leverington Fiona, Costa Katia Lemos, Pavese Helena, Lisle Allan & Hockings Marc, 2010. A global analysis of protected area management effectiveness. Environmental Management. 46, 685-698.
but I do not know if addresses or improved ecosystem services protected by protective measures.
3 paper concerning ptrotégées areas and ecosystem services, but unfortunately not marine areas:
Hein L., 2011. Economic Benefits Generated by Protected Areas: the Case of the Hoge Veluwe Forest, the Netherlands. Ecology and Society. 16, 13.
Martín-López B., García-Llorente M., Palomo I. & Montes C., 2011. The conservation against development paradigm in protected areas: Valuation of ecosystem services in the Doñana social-ecological system (southwestern Spain). Ecological Economics.
Palomo I., Martín-López B., López-Santiago C. & Montes C., 2011. Participatory Scenario Planning for Protected Areas Management under the Ecosystem Services Framework: the Doñana Social-Ecological System in Southwestern Spain. Ecology and Society. 16, 23.
Have a look in the paper Man as a Predator in the Intertidal Zone of Southern Chile by Carlos A. Moreno; John P. Sutherland; H. Fernando Jara in Oikos, Vol. 42, No. 2. (Jan., 1984), pp. 155-160. They follow the changes of the species that dominate the landscape.