Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Physiological, morphological, and environmental variation among geographically isolated cottonwood (Populus Deltoides) populations in New Mexico
Autore:
Rowland, DL; Beals, L; Chaudhry, AA; Evans, AS; Grodeska, LS;
Indirizzi:
USDA ARS, Natl Peanut Res Lab, Dawson, GA 31742 USA USDA ARS Dawson GA USA 31742 S, Natl Peanut Res Lab, Dawson, GA 31742 USA Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA Univ New Mexico Albuquerque NM USA 87131 Biol, Albuquerque, NM 87131 USA
Titolo Testata:
WESTERN NORTH AMERICAN NATURALIST
fascicolo: 4, volume: 61, anno: 2001,
pagine: 452 - 462
SICI:
1527-0904(200110)61:4<452:PMAEVA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL GENETIC-STRUCTURE; WATER-USE EFFICIENCY; DECIDUOUS FOREST; GAS-EXCHANGE; GROWTH; PHOTOSYNTHESIS; DECLINE; CLONES; POPLAR; RESPONSES;
Keywords:
Rio Grande; Populus deltoides; ecophysiology; soil salinity; groundwater; cottonwood;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Rowland, DL USDA ARS, Natl Peanut Res Lab, 1011 Forester Dr SE, Dawson, GA31742 USA USDA ARS 1011 Forester Dr SE Dawson GA USA 31742 GA 31742 USA
Citazione:
D.L. Rowland et al., "Physiological, morphological, and environmental variation among geographically isolated cottonwood (Populus Deltoides) populations in New Mexico", WEST N AM N, 61(4), 2001, pp. 452-462

Abstract

The ability of a plant population to respond and eventually adapt to environmental stress ultimately determines that population's survival. This becomes especially significant in environments where important plant resource levels have radically decreased. Southwestern riparian areas have numerous plant species that are experiencing radical changes in water availability due to construction of dams, and thus their ability to respond to such changes is critical. One such species likely to be greatly affected by these hydrological changes is Populus deltoides var. wislizenii (cottonwood) because it relies heavily on both groundwater and river surface volume as primary water sources. Both water sources have been extremely impacted by impoundments along Southwestern rivers. To understand how New Mexico populations of cottonwood may respond to environmental changes, we quantified environmentaldifferences and characterized physiological and morphological variation among 4 cottonwood populations. Significant differences among study sites in water availability were indicated by both soil and groundwater salinity. The northernmost site, at Abiquiu, had the highest salinity levels in both soil and groundwater, followed by Bernardo, while San Antonio and Corrales sites had the lowest soil salinity. As expected, variation in physiological and leaf morphological characters existed among and within the tree populations, most likely in response to environmental factors. Midday xylem pressure potentials indicated that Abiquiu individuals suffered the greatest waterstress and they also had the highest transpiration levels. Because of highspecific leaf weights and high photosynthetic levels. cottonwoods at Corrales may better mitigate lower water availability. Such physiological and morphological trait variability among populations is ecologically important and may be of use in present reclamation and conservation efforts in these areas.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/08/20 alle ore 17:02:17