Bargues Tobella, Aida
- University of Lleida
Sammanfattning
Models of plant species distribution and response to global change rely mostly on climatic variables alone, whereas soil variables are usually not taken into account. Evergreen and marcescent oaks are therefore considered to share environmental niches in the Mediterranean region despite their functional differences. We studied the distribution of forests dominated by either Quercus ilex (QI plots) or Q.faginea/Q. subpyrenaica (QF plots) in 46 plots at an altitude between 570 m and 980 m on a north-facing slope in northeastern Spain. We used binomial logistic regression and classification tree analysis to explain the distribution of the two types of forest. Soils of the sample plots were mostly Lithic Xerorthents developed from limestone. Surface mineral horizons of QI forests had higher organic carbon (C), nitrogen (N), and NaOH-extractable phosphorus concentrations, while organic layers had smaller values of the C/N and C/P ratios. Soils of QF forests accumulated higher amounts of C despite the lower concentration in their surface mineral horizons. The distribution of QF and QI forests was significantly explained by the variability in soil available water-holding capacity and rock fragment content, QF forests appearing on soils with over 22 mm of available water-holding capacity and
Nyckelord
Available water-holding capacity; Land evaluation; Quercus faginea; Quercus ilex; Rock fragments; Soil rootable depth
Publicerad i
Geoderma
2017, volym: 291, sidor: 11-20
SLU författare
UKÄ forskningsämne
Markvetenskap
Skogsvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1016/j.geoderma.2016.12.019
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/80070