| Full text | |
| Author(s): |
Gerolamo, Caian Souza
[1]
;
Nogueira, Anselmo
[2]
;
Capellotto Costa, Flavia Regina
[3, 4]
;
de Castilho, Carolina V.
[5]
;
Angyalossy, Veronica
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Inst Biociencias, Dept Bot, Rua Matao 277, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Fed ABC, CCNH, Sao Bernardo Do Campo - Brazil
[3] Univ Fed Amazonas, INPA, Manaus, Amazonas - Brazil
[4] Programa Posgrad Ecol, Manaus, Amazonas - Brazil
[5] Ctr Pesquisa Agroflorestal Roraima, Empresa Brasileira Pesquisa Agr EMBRAPA, Boa Vista - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF VEGETATION SCIENCE; v. 29, n. 4, p. 651-661, JUL 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
QuestionHave liana density and biomass increased in central Amazonia over the last 10years? Can a spatially explicit consideration of liana mortality and recruitment rates across hydro-edaphic and tree turnover gradients at the landscape scale explain changes in liana density and biomass? LocationDucke Forest Reserve, 26km north of Manaus, Amazonas, Brazil. MethodsData were collected on 30-1ha permanent plots in a central Amazonia undisturbed old-growth rain forest 10years after the first census. We measured lianas at 1.3cm above their rooting point, with a diameter (D)5cm and subsampled lianas 1cm diameter in 0.25ha per plot. We estimated above-ground density and biomass changes, mortality rate, recruitment and diameter increase. Soil cations and available P were reduced to two dimensions with PCA and the first axis used as the descriptor of soil fertility. Height above the nearest drainage, a proxy for water availability, tree turnover (D10cm) and soil fertility were used as predictors of liana dynamics. ResultsNo significant change in liana density and biomass, averaged over the 30-km(2) landscape, was observed over the last 10years. In 2014, liana density was generally higher in more fertile soils, and it increased in areas closer to the water table and with higher tree turnover in the valleys. This pattern resulted from the higher liana recruitment rates in valley plots closer to the water table. Liana mortality rates were uniform across plots, similar among the diameter classes and, on average, higher than recruitment. ConclusionWe did not find any evidence that liana density and biomass have been increasing in this Neotropical site over the last 10years. These findings suggest that the current knowledge on liana increase trends in the Neotropics should be reviewed if supported by further tropical studies. (AU) | |
| FAPESP's process: | 13/10679-0 - Ontogenetic, functional and evolutionary aspects of the cambial variants in tracheophytes |
| Grantee: | Veronica Angyalossy |
| Support Opportunities: | BIOTA-FAPESP Program - Regular Research Grants |