Ctra Madrid Barcelona;
Dept Ecol;
Fac Ciencias;
Area Ecol;
E-14071 Cordoba;
D-03046 Cottbus;
Germany;
Univ Paul Valery Montpellier 3;
CEFE;
Univ Alcala De Henares;
Escuela Tecn Super Ingn Agron & Montes;
Montpellier;
Life Sci Dept;
Campus Rabanales;
Ecol & Forest Restorat Grp;
600;
IRD;
Dept Agron;
Univ Cordoba;
EPHE;
Univ Montpellier;
Alcala De Henares 28805;
Brandenburg Tech Univ Cottbus;
Spain;
Km 33;
CNRS;
France;
关键词：
LMA;
Climate variability;
Aridity;
National Forest Inventory;
RGR;
期刊名称：
Science of the Total Environment
i s s n：
0048-9697
年卷期：
2021 年
786 卷
页 码：
摘 要：
Plant functional traits are highly plastic to changes in climatic factors and nutrient availability. However, the intraspecific plant response to abiotic factors and the overall effect on tree growth and productivity is still under debate. We studied forest productivity for 30 Quercus ilex subsp. ballota forests in Spain along a broad climatic gradient of aridity (mean annual precipitation from 321 to 858 mm). We used linear mixed models to quantify the effect of climatic and edaphic (soil nutrients, topography, and texture) factors on tree functional traits (leaf and branch traits), and subsequently, the effect of such functional traits and abiotic factors on the relative growth rate (RGR) of adult trees. We used piecewise structural equation models (SEMs) to determine the causal effect of intrinsic and extrinsic factors on forest productivity. Our results showed that tree functional traits were mainly explained by climatic and edaphic factors. Functional traits and tree biomass explained forest biomass and RGR, respectively, which ultimately explained forest productivity. In conclusion, intraspecific variability of functional traits has a significant effect on plant biomass and growth, which ultimately may explain forest productivity in Quercus ilex forests.
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