Photosynthetic traits and water use of tree species growing on abandoned pasture in different periods of precipitation in Amazonia

Title:

Photosynthetic traits and water use of tree species growing on abandoned pasture in different periods of precipitation in Amazonia

Creator:

Silva, C. E. M., Gonçalves, J. F. C., and Alves, E. G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:cc746e9c-4467-4f0a-a1a0-8f30cf4f86be
uuid:cc746e9c-4467-4f0a-a1a0-8f30cf4f86be
issn:0300-3604
doi:10.1007/s11099-011-0033-z

Subject:

botanika, botany, chronosequence, light-response curve, photosynthesis, secondary succession, and stomatal conductance

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Pasture soils in the Amazon become unsustainable after a short period of use, typically being replaced by emergent secondary vegetation (capoeira). The aim of this research was to investigate the photosynthetic capacity and water use in the most common tree species (Vismia japurensis, Vismia cayennensis, Bellucia grossularioides, Laetia procera, and Goupia glabra) in successional chronosequence. This study was carried out in secondary vegetation area with ages that vary between 1 and 19 years. Responses of gas exchange were determined during different periods of precipitation. The gas exchange decreased with advancing age of the vegetation (1-19 years), except for G. glabra. Negative relationships of PNmax as a function of aging observed for V. japurensis, V. cayennensis, B. grossularioides, and L. procera exhibited r2 equal to 0.59, 0.42, 0.33, and 0.58, respectively. The species of Vismia showed higher values for photosynthetic parameters in relation to other species across the chronosequence. Overall, there were differences in gas exchange only for some species between the different periods of precipitation. Therefore, our results suggest a distinct pattern of photosynthetic responses to species in early succession. Light decrease can exert a decisive role to reduce the photosynthetic rates in secondary succession species. On the other hand, the results of WUE showed weak evidence of changes for the species during dry and rainy periods in the abandoned pasture in central Amazonia. and C. E. M. Silva, J. F. C. Goncalves, E. G. Alves.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

246-252

Source:

Photosynthetica | 2011 Volume:49 | Number:2

Harvested from:

CDK

Metadata only:

false