کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
86750 159209 2013 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multivariate effect gradients driving forest demographic responses in the Iberian Peninsula
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Multivariate effect gradients driving forest demographic responses in the Iberian Peninsula
چکیده انگلیسی


• A synthetic analysis of Iberian forest demographic responses is provided.
• We analyze tree recruitment, growth and mortality responses at the large scale.
• Quantile modeling allowed the description of multivariate effect gradients.
• Significant differences are reported for the genus Quercus and Pinus.
• Different levels of effects are consistently observed across tree-size classes.

A precise knowledge of forest demographic gradients in the Mediterranean area is essential to assess future impacts of climate change and extreme drought events. Here we studied the geographical patterns of forest demography variables (tree recruitment, growth and mortality) of the main species in Spain and assessed their multiple ecological drivers (climate, topography, soil, forest stand attributes and tree-specific traits) as well as the geographical variability of their effects and interactions. Quantile modeling analyses allowed a synthetic description of the gradients of multiple covariates influencing forest demography in this area. These multivariate effect gradients showed significantly stronger interactions at the extremes of the rainfall gradient. Remarkably, in all demographic variables, qualitatively different levels of effects and interactions were observed across tree-size classes. In addition, significant differences in demographic responses and effect gradients were also evident between the dominant genus Quercus and Pinus. Quercus species presented significantly higher percentage of plots colonized by new recruits, whereas in Pinus recruitment limitation was significantly higher. Contrasting positive and negative growth responses to temperature were also observed in Quercus and Pinus, respectively. Overall, our results synthesize forest demographic responses across climatic gradients in Spain, and unveil the interactions between driving factors operating in the drier and wetter edges.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 303, 1 September 2013, Pages 195–209
نویسندگان
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