Efecte "memòria" de la sequera en l'ús de l'aigua i del nitrogen per part de Quercus ilex i Phillyrea latifolia en boscos mediterranis.

Peñuelas J, Filella I, Lloret F, Piñol J, Siscart D (2000) Efecte "memòria" de la sequera en l'ús de l'aigua i del nitrogen per part de Quercus ilex i Phillyrea latifolia en boscos mediterranis. In IV Trobada d'Estudiosos de Sant Llorenç del Munt ide l'Obac, Diputació de Barcelona, Barcelona, pp. 145-148.

Effects of a severe drought on water and nitrogen use by Quercus ilex and Phillyrea latifolia.

Peñuelas J, Filella I, Piñol J, Siscart D, Lloret F (2000) Effects of a severe drought on water and nitrogen use by Quercus ilex and Phillyrea latifolia. Biologia Plantarum 43:47-53.

Ecological implications of xylem cavitation for several Pinaceae in the Pacific Northern USA

Piñol J., Sala A. (2000) Ecological implications of xylem cavitation for several Pinaceae in the Pacific Northern USA. Functional Ecology. 14: 538-545.
Enllaç
Doi: 10.1046/j.1365-2435.2000.00451.x

Resum:

1. Xylem hydraulic properties and vulnerability to cavitation (determined using the air-injection method) were studied in six Pinaceae of the northern Rocky Mountains: Pinus ponderosa, Pseudotsuga menziesii, Larix occidentalis, Pinus contorta, Pinus albicaulis and Abies lasiocarpa. We tested whether species extending into drier habitats exhibited increased resistance to water stress-induced cavitation, and whether there is a trade-off between xylem transport capacity and resistance to cavitation. 2. At lower elevations the more drought-tolerant P. ponderosa was much less resistant to cavitation than the codominant P. menziesii. Greater vulnerability to cavitation in P. ponderosa was compensated for, at least in part, by increased stomatal control of water loss (inferred from carbon isotope discrimination) and by increased sapwood to leaf area ratios. Similar differences, but less pronounced, were found in codominant species at higher elevations. 3. Leaf specific hydraulic conductivity was negatively correlated with mean cavitation pressure. When species were separated into pines and non-pines, sapwood specific conductivity and mean cavitation pressure were also negatively correlated within each of the two groups. 4. Our results indicate that within the evergreen conifers examined, greater resistance to water stress-induced cavitation is not required for survival in more xeric habitats, and that there is a trade-off between xylem conductance and resistance to cavitation.

Llegeix més

Element budgets in catchments.

Avila A, Bellot J, Piñol J (1999) Element budgets in catchments. In Rodà F, Retana J, Gracia C, Bellot J (eds) Ecology of Mediterranean evergreen oak forests. Springer, Berlin, pp. 283-296.

Water balance in catchments.

Piñol J, Avila A, Escarré A (1999) Water balance in catchments. In Rodà F, Retana J, Gracia C, Bellot J (eds) Ecology of Mediterranean evergreen oak forests. Springer, Berlin, pp. 273-282.

Precipitation chemistry and air pollution.

Escarré A, Carratalá A, Avila A, Bellot J, Piñol J, Millán M (1999) Precipitation chemistry and air pollution. In Rodà F, Retana J, Gracia C, Bellot J (eds) Ecology of Mediterranean evergreen oak forests. Springer, Berlin, pp. 195-208.

Climate warming, wildfire hazard and wildfire occurrence in coastal Eastern Spain.

Piñol J, Terradas J, Lloret F (1998) Climate warming, wildfire hazard and wildfire occurrence in coastal Eastern Spain. Climatic Change 38:345-357.

Leaf gas exchange and fluorescence of Phillyrea latifolia, Pistacia lentiscus and Quercus ilex saplings in severe drought and high temperature conditions.

Filella I, Llusià J, Piñol J, Peñuelas J (1998) Leaf gas exchange and fluorescence of Phillyrea latifolia, Pistacia lentiscus and Quercus ilex saplings in severe drought and high temperature conditions. Environmental and Experimental Botany 39:213-220.

Risk factors in wildfires along the Mediterranean coast of the Iberian Peninsula.

Terradas J, Piñol J, Lloret F (1998) Risk factors in wildfires along the Mediterranean coast of the Iberian Peninsula. In Trabaud L (ed) Fire management and landscape ecology. International Association of Wildland Fire, Washington, pp. 297-304.

Drought memory effects on water and N use by Quercus ilex and Phillyrea latifolia in Mediterranean forests.

Peñuelas J, Filella I, Lloret F, Piñol J, Siscart D (1998) Drought memory effects on water and N use by Quercus ilex and Phillyrea latifolia in Mediterranean forests. Butlletin de la Société d'Ecophysiologie 1998:47.

Pàgines