Effects of nutrient additions on plant biomass and diversity of the herbaceous-subshrub layer of a Brazilian savanna (Cerrado).

dc.contributor.authorBustamante, Mercedes Maria da Cunha
dc.contributor.authorBrito, Darlan Quinta de
dc.contributor.authorKozovits, Alessandra Rodrigues
dc.contributor.authorLuedemann, Gustavo
dc.contributor.authorMello, Thiago de Roure Bandeira de
dc.contributor.authorPinto, Alexandre de Siqueira
dc.contributor.authorMunhoz, Cássia Beatriz Rodrigues
dc.contributor.authorTakahashi, Frederico Scherr Caldeira
dc.date.accessioned2017-08-01T14:53:19Z
dc.date.available2017-08-01T14:53:19Z
dc.date.issued2012
dc.description.abstractThe Brazilian Cerrado is a diversity hotspot due to its high level of endemism and rapid loss of habitats. It is estimated that the number of herbaceous species is four times higher than that of woody species. Increasing levels of nitrogen additions to natural ecosystems have been indicated as a determinant of biodiversity loss. We investigated the effects of nutrient additions on the productivity (aboveground and belowground) and on diversity of the herbaceoussubshrub layer of a Brazilian savanna (cerrado stricto sensu). The experiment was carried out in the IBGE Ecological Reserve, near Brası´lia, Brazil. Between 1998 and 2006, N, P, N plus P, or Ca were applied to sixteen 225 m2 plots, arranged in a completely randomized design. Aboveground biomass was compared 1 year after the first fertilization and 10 years later. Floristic diversity was significantly different (P\0.01) between the treatments. The highest and lowest species richness were presented in control and NP, respectively. The addition of P alone or in combination with N induced invasion by Melinis minutiflora (exotic C4 grass). The aboveground biomass of this species was higher in NP and P plots. In the N treatment, Echinolaena inflexa (native C3 grass) presented elevated cover and biomass but M. minutiflora was absent. The invasion by alien species resulted in negative impacts on native grass species. Besides changes in aboveground biomass, addition of N and P also led, although to a lesser extent, to changes in the root morphology and biomass, but these responses were modulated by seasonal variation in soil moisture. The results suggest that environmental changes in nutrient availability can lead to important consequences for diversity and functioning of this savanna where the numerous rare species have more chance to persist under dystrophic conditions as some species that tend to be dominant would be less competitive.pt_BR
dc.identifier.citationBUSTAMANTE, M. M. da C. et al. Effects of nutrient additions on plant biomass and diversity of the herbaceous-subshrub layer of a Brazilian savanna (Cerrado). Plant Ecology, Dordrecht, v. 213, p. 795-808, 2012. Disponível em: <https://link.springer.com/article/10.1007/s11258-012-0042-4>. Acesso em: 20 de jul. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1007/s11258-012-0042-4
dc.identifier.issn1573-5052
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/8396
dc.identifier.uri2https://link.springer.com/article/10.1007/s11258-012-0042-4pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectBiological invasionpt_BR
dc.subjectNitrogenpt_BR
dc.subjectPhosphoruspt_BR
dc.subjectProductivitypt_BR
dc.titleEffects of nutrient additions on plant biomass and diversity of the herbaceous-subshrub layer of a Brazilian savanna (Cerrado).pt_BR
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