Claim · model-written summary
The authors infer a trade-off between upper-soil nutrient access by brevi-deciduous species and reliable deep-water access by evergreens.
- Taxon
- Neotropical savanna treest0
- Material
- brevideciduous speciese0
- Outcome
- access to nutrients in the upper soil layerse0
- Direction
- greatere0
- Qualifier
- trade-offe0
- Comparator
- evergreen speciese0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValue
Verbatim
e0“There appears to be a trade-off between greater year-round access to nutrients in the upper soil layers (deciduous and brevideciduous species) and a greater access to deep and more reliable water sources during the dry season (evergreen species)”
t0“Neotropical savanna trees”
Title
Biophysical and life‐history determinants of hydraulic lift in Neotropical savanna trees
F. G. Scholz; S. J. Bucci; G. Goldstein; et al. Functional Ecology 2008. doi:10.1111/j.1365-2435.2008.01452.x
Other claims from this paper (15)
- Observation Deciduous species exhibited dry-season reverse sap flow consistent with hydraulic lift.
- Observation Brevi-deciduous species exhibited dry-season reverse sap flow consistent with hydraulic lift.
- Observation Evergreen species did not exhibit reverse flow.
- Observation Brevi-deciduous species had dimorphic shallow and tap-root systems.
- Observation Deciduous species had dimorphic shallow and tap-root systems.
- Observation Evergreen species had mostly deep monomorphic root systems.
- Association Tap-root contribution to transpiration increased as the dry season progressed in deciduous species.
- Association Tap-root contribution to transpiration increased as the dry season progressed in brevi-deciduous species.
- Observation Evergreen species showed no seasonal changes in tap-root contribution to transpiration.
- Association Reverse sap-flow rates were inversely related to seasonal loss of lateral-root hydraulic conductivity.
- Mechanism Hydraulic lift may maintain lateral-root functionality in dry nutrient-rich superficial soil without directly increasing water uptake.
- Association Deciduous lateral-root reverse sap flow increased asymptotically with the driving force for root-to-soil water movement.
- Association Brevi-deciduous lateral-root reverse sap flow increased asymptotically with the driving force for root-to-soil water movement.
- Mechanism The nonlinear relationship implies nocturnal transpiration and storage refilling may compete for internal water during the dry season.
- Association The authors infer a trade-off between upper-soil nutrient access by deciduous species and reliable deep-water access by evergreens.