Physiological and Stuctural Mechanisms of Niche Differentiation for Three Sky Island Oaks in Relation to Light and Temperature

Persistent Link:
http://hdl.handle.net/10150/555932
Title:
Physiological and Stuctural Mechanisms of Niche Differentiation for Three Sky Island Oaks in Relation to Light and Temperature
Author:
Poulos, Helen M.; Berlyn, Graeme P.; Goodale, Uromi M.
Affiliation:
School of Forestry and Environmental Studies, Yale University
Publisher:
University of Arizona (Tucson, AZ)
Journal:
Desert Plants
Rights:
Copyright © Arizona Board of Regents. The University of Arizona.
Collection Information:
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu.
Issue Date:
Jun-2008
Abstract:
In an effort to identify the influence of light and temperature on the physiology and leaf structural characteristics of three species of Quercus from Coahuila, Mexico, we measured a comprehensive suite of plant traits as functions of light and temperature intensity. We tested the hypotheses that 1) species' physiological responses to light and temperature were related to their distributions in their native habitats; and 2) that species' physiological responses corresponded to similar variation in leaf anatomical and morphological traits. Quercus sideroxyla was adapted to high elevation forest over stories as evidenced by its high photosynthetic rate, transpiration rate, relative water content (RWC), leaf density (LD), and thick palisade and spongy parenchyma. Quercus rugosa displayed typical characteristics of a forest understory species including a low photosynthetic rate and light saturation point, thick spongy parenchyma tissue and high RWC, leaf density, and leaf mass per unit area. Quercus laceyi was adapted to hot, dry sites based on its lower RWC and LD, intermediate photosynthetic rate, thick cuticle and upper epidermis, and low transpiration rates at high temperatures. Our results suggest that the physiological and structural adaptations of Mexican oaks to changing environmental conditions across resource gradients are key regulators of plant community structure.
Type:
Article
ISSN:
0734-3434

Full metadata record

DC FieldValue Language
dc.contributor.authorPoulos, Helen M.en
dc.contributor.authorBerlyn, Graeme P.en
dc.contributor.authorGoodale, Uromi M.en
dc.date.accessioned2015-05-27T16:52:36Zen
dc.date.available2015-05-27T16:52:36Zen
dc.date.issued2008-06en
dc.identifier.issn0734-3434en
dc.identifier.urihttp://hdl.handle.net/10150/555932en
dc.description.abstractIn an effort to identify the influence of light and temperature on the physiology and leaf structural characteristics of three species of Quercus from Coahuila, Mexico, we measured a comprehensive suite of plant traits as functions of light and temperature intensity. We tested the hypotheses that 1) species' physiological responses to light and temperature were related to their distributions in their native habitats; and 2) that species' physiological responses corresponded to similar variation in leaf anatomical and morphological traits. Quercus sideroxyla was adapted to high elevation forest over stories as evidenced by its high photosynthetic rate, transpiration rate, relative water content (RWC), leaf density (LD), and thick palisade and spongy parenchyma. Quercus rugosa displayed typical characteristics of a forest understory species including a low photosynthetic rate and light saturation point, thick spongy parenchyma tissue and high RWC, leaf density, and leaf mass per unit area. Quercus laceyi was adapted to hot, dry sites based on its lower RWC and LD, intermediate photosynthetic rate, thick cuticle and upper epidermis, and low transpiration rates at high temperatures. Our results suggest that the physiological and structural adaptations of Mexican oaks to changing environmental conditions across resource gradients are key regulators of plant community structure.en
dc.language.isoen_USen
dc.publisherUniversity of Arizona (Tucson, AZ)en
dc.rightsCopyright © Arizona Board of Regents. The University of Arizona.en_US
dc.sourceCALS Publications Archive. The University of Arizona.en_US
dc.titlePhysiological and Stuctural Mechanisms of Niche Differentiation for Three Sky Island Oaks in Relation to Light and Temperatureen_US
dc.typeArticleen
dc.contributor.departmentSchool of Forestry and Environmental Studies, Yale Universityen
dc.identifier.journalDesert Plantsen
dc.description.collectioninformationDesert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu.en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.