English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Two Amazonian floodplain trees react differently to periodical flooding

Parolin, P., Armbrüster, N., & Junk, W. J. (2006). Two Amazonian floodplain trees react differently to periodical flooding. Tropical Ecology, 47(2), 243-250.

Item is

Files

show Files
hide Files
:
Parolin Armbrüster Junk 2006 Tropical Ecology.pdf (Publisher version), 2MB
 
File Permalink:
-
Name:
Parolin Armbrüster Junk 2006 Tropical Ecology.pdf
Description:
-
OA-Status:
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, MPLM; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Parolin, Pia1, Author           
Armbrüster, Nicole1, Author           
Junk, W. J.1, Author           
Affiliations:
1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976549              

Content

show
hide
Free keywords: biocoenotic extreme-site rule; flood gradient; flood pulse concept; life strategies; whitewater floodplain forest; zonation
 Abstract: We tested if two Amazonian floodplain tree species, , Laetia corymbulosa (Flacourtiaceae) and Pouteria glomerata (Sapotaceae), react in a similar way to the extreme changes of hydrologic conditions. They have several features in common and both belong to the "alternative energy metabolism" strategy. A strong leaf loss and significant reduction of new leaf production was observed in L. corymbulosa in a period of unusually strong drought, accompanied by a significant decrease in predawn leaf water potential. P. glomerata was not affected by drought, but showed a complete inhibition of new leaf production in the period of highest water levels. Photosynthetic activity in L. corymbulosa was highest in the terrestrial phase (13 µmol CO2 m-2 s-1). In the first week after inundation net CO2-exchange rates were comparable to those of the terrestrial phase, but dropped drastically to 3 µmol CO2 m-2 s-1 after approx. six months of waterlogging. In contrast, assimilation rates of P. glomerata were nearly constant during the whole annual cycle, ranging between 8 and 12 µmol CO2 m-2 s-1. The results show that L. corymbulosa reacts more sensitively to both drought and long-term waterlogging than P. glomerata. Both species which belong to the same strategy group as defined by root metabolism show predictable reactions to the changing hydrological conditions, and the reactions are linked to the hydric environment. On the other hand, they show very different phenological and physiological patterns and thus stand for the high diversity of species and of strategies of trees of Várzea floodplains.

Details

show
hide
Language(s): eng - English
 Dates: 2006
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 321535
Other: 2571/S 38725
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Tropical Ecology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 47 (2) Sequence Number: - Start / End Page: 243 - 250 Identifier: ISSN: 0564-3295