No dia 28 de junho de 2017, às 08:00h na sala de videoconferência da STI-UFBA, no campus de Ondina, a doutoranda do Laboratório de Ecologia Básica e Aplicada, Candelaria Estavillo, defenderá sua tese intitulada "Linking environmental change and ecosystem processes via response-and-effect functional traits".
Participam da banca: Dr. Pedro Luis Bernardo da Rocha (orientador), Universidade Federal da Bahia; Dr. Ricardo Dobrovolski, Universidade Federal da Bahia; Dra. Blandina Felipe Viana, Universidade Federal da Bahia; Dra. Maíra Benchimol de Souza, Universidade Estadual de Santa Cruz; e Dr. Julián Lescano, Universidad Nacional de Córdoba.
A tese é composta de dois manuscritos cujos resumos são transcritos abaixo.
Chapter 1: "A conceptual model of response-and-effect functional traits: from species to ecosystems via community dynamics"
Traits-based approaches are a promising line of research to understand the effects of environmental change on ecosystem functioning through changes in community dynamics. Even when this framework represents a fundamental advance in understanding natural systems, many difficulties arouse to its implementation. In this work we detailed three steps that hope will clarify the application of a response-and –effect framework. The procedure was applied to understand the response of small mammals to forest loss and the impacts that the changed community have on forest regeneration and disease spreading. Firstly, the relevant response and effect traits were identified; secondly, the degree of overlap between traits was analyzed through correlations. Finally, a conceptual model linking environmental change and ecosystem processes via overlap of response and effect trait was built. Main advances and difficulties were discussed.
Chapter 2: "Linking change and function using functional groups: the response of small mammals to forest loss and its effects on ecosystem functioning"
The current biodiversity crisis, which is mainly driven by habitat loss, raises concern about the future of ecosystems functioning and the services they provide. In this work, a response-and-effect trait framework was applied to predict the effects of forest loss on ecosystem services mediated by small mammals of the Atlantic forest. To this end, statistical procedures were used to group species with similar traits of response to forest loss, and to impact ecosystem functioning. Responses were translated into effects measuring changes in functional group representation along a gradient of habitat loss at the landscape scale. Empirical findings point to the negative effects of forest loss on response groups with certain combination of traits, with the potential of disrupting ecosystem services delivery in more degraded landscapes. The regulating role of diversity in disease transmission can be jeopardized by forest loss, as well as the contribution of the community to forest regeneration.