An understanding of the interactions between climate change and forest structure on tree growth are needed for decision making in forest conservation and management. In this paper, we investigated the relative contribution of tree features and stand structure on Atlas cedar (Cedrus atlantica) radial growth in forests that have experienced heavy grazing and logging in the past. Dendrochronological methods were applied to quantify patterns in basal-area increment and drought sensitivity of Atlas cedar in the Middle Atlas, northern Morocco. We estimated the tree-to-tree competition intensity and quantified the structure in Atlas cedar stands with contrasting tree density, age, and decline symptoms. The relative contribution of tree age and size and stand structure to Atlas cedar growth decline was estimated by variance partitioning using partial-redundancy analyses. Recurrent drought events and temperature increases have been identified from local climate records since the 1970s. We detected consistent growth declines and increased drought sensitivity in Atlas cedar across all sites since the early 1980s. Specifically, we determined that previous growth rates and tree age were the strongest tree features, while Quercus rotundifolia basal area was the strongest stand structure measure related to Atlas cedar decline. As a result, we suggest that Atlas cedar forests that have experienced severe drought in combination with grazing and logging may OPEN ACCESSForests 2011, 2 778 be in the process of shifting dominance toward more drought-tolerant species such as Q. rotundifolia.

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Ecological restoration is a suitable tool to revert land degradation in semiarid areas. Social participation is increasingly considered as a guarantee for the long‐term success and sustainability of restoration projects. In rural areas of North African countries, experiences of participatory restoration are still not frequent, and poverty and illiteracy with top‐down approaches boost land‐use conflicts and raise skepticism toward restoration programs. We developed a framework for forest restoration based on knowledge share, trust, and active stakeholder participation in all restoration steps. The framework was tested through a demonstrative project aimed at restoring Tetraclinis articulata forests in a semiarid area of North Morocco, in which scientists, managers, and local stakeholders were involved in all steps of the restoration process: identification of restoration priorities, assessment of land‐use options, definition of the restoration procedure, participatory plantation, evaluation, surveillance, and monitoring. In a 1 ha plot, 250 plants were planted by 90 participants in a spirit of knowledge exchange, mutual aid, environmental education, and social solidarity. After 2 years, the plot remains intact, free of any act of vandalism and grazing, and shows signals of improved ecosystem functioning. A wider application of the proposed framework in current restoration strategies will enhance our understanding of the factors behind social acceptance and support for restoration projects.

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Aim of study: Understanding small-scale patterns caused by stochastic factors or community interactions driving forest structure and diversity of Moroccan fir Abies marocana Trab.Area of study: Talassemtane fir forest, Talassemtane National Park, Rif Mountains, northern Morocco.Material and methods: Eight plots representative of the structural variability of A. marocana forests were selected, and all tree individuals with diameter at breast height (dbh) ≥2 cm were mapped and measured. We performed four types of spatial point pattern analyses: (1) Univariate analyses to explore the overall trees spatial pattern, (2) bivariate analyses to assess the spatial relationship between juveniles and A. marocana adults, (3) correlation between tree sizes (dbh) and distance between points pairs using the univariate mark correlation function, and (4) random labeling analyses between dominant and suppressed Moroccan fir individuals to assess competition patterns.Main results: We found a strong spatial aggregation of fir individuals and a positive intraspecific association between juveniles and adult trees. However, there were weak but significant distance-dependent effect on tree size and density-dependent effect on suppression pattern.Research highlights: Shade-tolerance, seed dispersal and/or microsite heterogeneity might play important roles in the observed fir patterns. Our results provide a basic knowledge on within-stand Moroccan fir spatial distribution, with implications for adaptive management of these relic forests, and prompting to further research to test advanced hypotheses.Additional key words: Moroccan fir; Talassemtane National Park; Rif forest; Spatial analysis; summary statistics; facilitation; aggregation.Abbreviations used: MF (Moroccan fir); Talassemtane National Park (TNP); dbh (diameter at breast height); Univariate pair-correlation function (g(r)); Heterogeneous Poisson (HP); Bivariate pair-correlation function (g12(r)); Univariate mark correlation function (kmm(r)), Mark connection function (p12(r)).