Banca de QUALIFICAÇÃO: ADRIANO SOARES MOTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ADRIANO SOARES MOTA
DATA : 14/11/2018
HORA: 14:00
LOCAL: SALA DE REUNIÕES DO DECOL
TÍTULO:

INDIVIDUAL AND INTERACTIVE EFFECTS OF THE DIVERSITY OF DETERMINATIONS AND THE CHARACTERISTICS AND DIVERSITY OF HABITATS ON DECOMPOSITION

PALAVRAS-CHAVES:

Decomposition; ecosystem functioning; biodiversity; complementarity effects; selection effects

PÁGINAS: 21
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

An increasing number of evidences have pointed to the importance of the diversity of debris as mediating factor of the decomposition process in terrestrial ecosystems. Among these evidences, many point to the importance of functional diversity as a determining factor of the non-additive effects originated from the complementarity between different types of debris. However, the decomposition process can be affected both by the biotic components of the ecosystems, via biological decomposition, and by abiotic components such as leaching and etc ... In this way, the loss of habitat diversity may be relevant to ecosystem functioning not only for mediating the loss of species, but also for determining the loss of direct abiotic effects on some ecosystem processes. In addition, this conjecture opens the possibility for the occurrence of interactive effects between functional diversity of debris and habitat diversity on decomposition, something not yet tested in the literature. Here, we evaluated in a field experiment over 10 months the individual and interactive effects between the diversity of debris, habitat diversity and environmental context, on the decomposition. For this, the debris diversity (two levels) was factorially manipulated along the diversity of habitats (two levels). Leaf debris of five common tree species in the Potiguar restinga was used to construct treatments in monoculture and in all possible cultivations. Habitat diversity was manipulated in treatments containing two isolated habitats (litter without soil below), (soil without litter above), and litter and soil combined. In general, the diversity of debris significantly affected the decomposition, both at the level of the mixture of debris as a whole, and at the level of the component species of the particular mixtures. The diversity of habitats did not individually affect the debris decomposition, but its effects interacted significantly with the diversity of debris on the decomposition of 3 of the 5 species studied. These results expand our knowledge of the ecosystem mechanisms responsible for mediating non-additive effects of debris diversity on decomposition and indicate that the effects of diversity in a given habitat depend on environmental mechanisms or conditions originating or present in other habitats.

MEMBROS DA BANCA:
Presidente - 1714892 - ADRIANO CALIMAN FERREIRA DA SILVA
Interno - 1362202 - JOSE LUIZ DE ATTAYDE
Externo à Instituição - JOSÉ LUIZ ALVES SILVA