Next Article in Journal
Use of Forest Residues for Building Forest Biomass Supply Chains: Technical and Economic Analysis of the Production Process
Previous Article in Journal
Forest Typification to Characterize the Structure and Composition of Old-growth Evergreen Forests on Chiloe Island, North Patagonia (Chile)
Forests 2013, 4(4), 1106-1120; doi:10.3390/f4041106
Article

Contrasting Hydraulic Strategies during Dry Soil Conditions in Quercus rubra and Acer rubrum in a Sandy Site in Michigan

1
,
2,* , 2
,
3
,
3
,
4
 and
4
Received: 13 September 2013 / Revised: 4 November 2013 / Accepted: 3 December 2013 / Published: 11 December 2013
View Full-Text   |   Download PDF [394 KB, uploaded 11 December 2013]   |   Browse Figures

Abstract

Correlation analyses were carried out for the dynamics of leaf water potential in two broad-leaf deciduous tree species in a sandy site under a range of air vapor pressure deficits and a relatively dry range of soil conditions. During nights when the soil is dry, the diffuse-porous, isohydric and shallow-rooted Acer rubrum does not recharge its xylem and leaf water storage to the same capacity that is observed during nights when the soil is moist. The ring-porous, deep-rooted Quercus rubra displays a more anisohydric behavior and appears to be capable of recharging to capacity at night-time even when soil moisture at the top 1 m is near wilting point, probably by accessing deeper soil layers than A. rubrum. Compared to A. rubrum, Q. rubra displays only a minimal level of down-regulation of stomatal conductance, which leads to a reduction of leaf water potential during times when vapor pressure deficit is high and soil moisture is limiting. We determine that the two species, despite typically being categorized by ecosystem models under the same plant functional type—mid-successional, temperate broadleaf—display different hydraulic strategies. These differences may lead to large differences between the species in water relations, transpiration and productivity under different precipitation and humidity regimes.
Keywords: ecohydrology; leaf water potential; plant functional type; stomatal conductance; succession; transpiration; water relations ecohydrology; leaf water potential; plant functional type; stomatal conductance; succession; transpiration; water relations
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Thomsen, J.E.; Bohrer, G.; Matheny, A.M.; Ivanov, V.Y.; He, L.; Renninger, H.J.; Schäfer, K.V.R. Contrasting Hydraulic Strategies during Dry Soil Conditions in Quercus rubra and Acer rubrum in a Sandy Site in Michigan. Forests 2013, 4, 1106-1120.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Forests EISSN 1999-4907 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert