Stand history and its consequences for the present and future dynamic 
in two silver fir (<i>Abies alba</i> Mill.) stands in the high Pesio Valley 
(Piedmont, Italy)

Motta, Renzo; Garbarino, Fabrizio

doi:10.1051/forest:2003027

Cited by 47 publications

(49 citation statements)

References 36 publications

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“…These results could encourage forest managers to preserve the other broadleave trees from the early aggradation phase to increase their abundance in the SDT pool. Those species should not be eliminated to respect the original mixtures of broadleave trees [32] even if they are products of little or no commercial value. Such management measures might provide breeding and foraging habitats for both vertebrates and invertebrates.…”

Section: Forestry Implicationsmentioning

confidence: 99%

The management of snags: A comparison in managed and unmanaged ancient forests of the Southern French Alps

Marage

Lempérière

2005

Ann. For. Sci.

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-Dead wood is an important structure for conservation purposes and for maintaining biodiversity. In this context, snags were studied under different conditions in silver fir ancient forests of the southern French Alps. The impact of management status and developmental phases were estimated on both quantity and quality of this material. SDT volume averaged 64.6 ± 19.8 m 3 ·ha -1 and 15.8 ± 6.0 m 3 ·ha -1 in unmanaged and managed ancient forests, respectively. SDT volume varied according to the point in the silvicultural cycle and silvigenesis cycle ranging from 4.3 ± 3.4 m 3 ·ha -1 in early aggradation phase of managed forests to 202.3 ± 48.6 m 3 ·ha -1 in degradation phase of unmanaged forest. Large SDT significantly belonged to the degradation phase of unmanaged forests. Our research showed that SDT density in this ancient forests was mainly governed by natural processes. An average of 9 large SDT per ha has been proposed to preserve the ecological processes.Alps / ancient forest / dead wood / ecological persistence / silver fir Résumé -Gestion du bois mort sur pied : comparaison entre forêts anciennes gérées et subnaturelles des Alpes du Sud françaises. La quantité de bois mort est un enjeu important dans la conservation et le maintien de la biodiversité forestière. Dans ce contexte, les bois morts sur pied ont été étudiés dans des hêtraies-sapinières anciennes des Alpes du Sud françaises. L'impact du mode de gestion et des différentes phases du cycle sylvicultural et de la mosaïque sylvatique a été estimé. Le volume moyen de bois mort sur pied atteint 64,6 ± 19,8 m 3 ·ha -1 dans les forêts anciennes inexploitées, alors qu'il n'est que de 15,8 ± 6,0 m 3 ·ha -1 dans les forêts exploitées. Ce volume moyen varie selon la mosaïque sylvatique, passant de 4,3 ± 3,4 m 3 ·ha -1 dans la jeune phase d'aggradation des forêts anciennes exploitées à 202,3 ± 48,6 m 3 ·ha -1 dans la phase de sénescence des forêts anciennes inexploitées. Cette dernière contient significativement les gros bois sec sur pied (DBH > 43 cm). Nos résultats montrent que dans ces écosystèmes montagnards, la disponibilité en bois mort sur pied, est due essentiellement aux fortes contraintes environnementales en présence.Alpes / bois mort / forêt ancienne / persistance écologique / sapin pectiné

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Section: Forestry Implicationsmentioning

confidence: 99%

The management of snags: A comparison in managed and unmanaged ancient forests of the Southern French Alps

Marage

Lempérière

2005

Ann. For. Sci.

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“…Releases from suppression chronology was compared to the black locust pattern of the establishment in order to identify which disturbances enhanced the black locust tree recruitment (Motta et al, 1999;Motta and Garbarino, 2003).…”

Section: Disturbance Historymentioning

confidence: 99%

L’essor et le déclin du robinier (Robinia pseudoacacia L.) dans la Réserve Forestière « Siro Negri » (Lombardie, Italie) : leçons et incertitudes futures

2009

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Abstract• The alluvial forests of the Ticino valley have been greatly reduced in size and are now represented by only a small number of fragmented remnants. To study the natural development of the black locust, an invasive species, on relatively undisturbed lowland forests, two permanent plots were established in 2005 in the "Siro Negri" Forest Reserve.• The black locust became established almost exclusively between 1940 and 1960. The observed dynamic of the black locust in the Reserve was very similar to what has been observed in its native North American range: following the initial colonization, the black locust firmly established itself in the dominant and intermediate layers but did not regenerate. In addition to the absence of a significant younger population, the decline of the black locust is evident in an elevated mortality rate and higher proportion of black locust biomass in the total coarse woody debris (CWD)• Our results support the hypothesis that the best strategy to control the spread of black locust is to avoid disturbances that favour black locust colonization, and to wait for natural suppression of the species by other trees. Due to the lack of past reference conditions and the future uncertainties, ongoing monitoring will be needed to fully understand the dynamics of forest ecosystem change in the Reserve. • Les forêts alluviales de la vallée du Tessin ont été fortement réduites en taille et ne sont maintenant représentées que par un petit nombre de vestiges fragmentaires. Pour étudier le développement naturel du robinier, une espèce envahissante, dans des forêts de plaine relativement intactes, deux placettes permanentes ont été établies en 2005 dans la Réserve Forestière « Siro Negri ». Mots-clés• Le robinier s'est établi presque exclusivement entre 1940 et 1960. La dynamique d'installation observée de Robinia pseudoacacia L. dans la réserve est très similaire à ce qui a été observé dans son habitat naturel en Amérique du Nord : après la première colonisation, le robinier s'est fermement établi dans les strates dominantes et intermédiaires, mais il ne s'est pas régénéré. En plus de l'absence d'une population plus jeune, l'évidence du déclin du robinier est révélée par une élévation du taux de mortalité et une plus grande proportion de la biomasse du robinier dans le total des débris ligneux grossiers (CWD).• Nos résultats appuient l'hypothèse que la meilleure stratégie pour contrôler la propagation du robinier est d'éviter les perturbations qui favorisent sa propagation, et d'attendre la suppression physique de l'espèce par d'autres arbres. En raison de l'absence de références sur les conditions passées, et les incertitudes futures, la surveillance continue sera nécessaire pour comprendre la dynamique de l'écosystème forestier dans la réserve.

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“…Tree-ring analysis has been used to reconstruct fire histories in woodlands [15,51], to reproduce past forest insect infestations [21,48], to study geomorphic processes [19,30], and to precisely date past earthquakes [20,46]. By contrast, dendrochronological studies, focused on past management reconstruction in manhandled forests, are rare [5,9,32]. Dendroarchaeological studies displayed abundant examples of pollarding signals in tree-rings [2,3,13,40].…”

Section: Introductionmentioning

confidence: 99%

Dendrochronology of pedunculate oak (Quercus robur L.) in an old-growth pollarded woodland in northern Spain: establishment patterns and the management history

Rozas

2005

Ann. For. Sci.

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-Long-term patterns of tree establishment and past management practices, in an old-growth pollarded woodland in northern Spain, were studied using dendrochronological techniques. Age distribution revealed three main cohorts of pedunculate oak (Quercus robur L.): < 50 years, 150-200 years old, and 250-500 years old. Juveniles and trees 200-299 years were found to be clumped and spatially segregated from older trees. Oaks older than 300 years showed a random spatial distribution. Mean pollarding intervals had increased through time, and the mean number of suppressions per year had decreased significantly. Pollarding frequency and intensity had decreased since 1917 in mature trees, and since 1905 in old-growths, suggesting a decline of the pollarding practice in the early 20th century. A delay of 6 years in growth releases, with respect to growth suppressions, was common. This resulted from both strong growth recovery after pollarding, and the release of growing space in the canopy. Mature oaks mainly showed 1-3 pollarding signals, while in old-growths between 4-7 growth suppressions per tree were more frequent. In 1774, 1792, 1806, 1839 and 1859, small groups of trees and scattered trees were pollarded, while in 1905 a generalised reduction of tree growth was noted. The results obtained from this study have significant connotations regarding the preservation and management of formerly pollarded woodlands.

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Stand history and its consequences for the present and future dynamic in two silver fir (Abies alba Mill.) stands in the high Pesio Valley (Piedmont, Italy)

Cited by 47 publications

References 36 publications

The management of snags: A comparison in managed and unmanaged ancient forests of the Southern French Alps

The management of snags: A comparison in managed and unmanaged ancient forests of the Southern French Alps

L’essor et le déclin du robinier (Robinia pseudoacacia L.) dans la Réserve Forestière « Siro Negri » (Lombardie, Italie) : leçons et incertitudes futures

Dendrochronology of pedunculate oak (Quercus robur L.) in an old-growth pollarded woodland in northern Spain: establishment patterns and the management history

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