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Comparing volume growth in pure and mixed stands of Pinus sylvestris and Quercus pyrenaica / Miren del Río in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 502 Titre : Comparing volume growth in pure and mixed stands of Pinus sylvestris and Quercus pyrenaica Titre original : Comparaison de la croissance en volume dans des peuplements purs et des peuplements mixtes de Pinus sylvestris et de Quercus pyrenaica Type de document : Article/Communication Auteurs : Miren del Río, Auteur ; Miren del Río, Auteur ; Hubert Sterba, Auteur Année de publication : 2009 Article en page(s) : n° 502 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse comparative [Termes IGN] croissance des arbres [Termes IGN] densité du bois [Termes IGN] forêt méditerranéenne [Termes IGN] peuplement mélangé [Termes IGN] Pinus sylvestris [Termes IGN] Quercus pyrenaica [Termes IGN] volume en bois [Vedettes matières IGN] Sylviculture Résumé : (auteur) In Mediterranean forestry, it is important to improve knowledge about mixed stands dynamics, including their productivity. Previous studies have focused on the interactions between different species (competition, reduction of competition and facilitation) depending on site, species composition and structure. At the centre of this research are the possible differences between pure and mixed stands of Pinus sylvestris and Quercus pyrenaica in terms of density-growth relationships and volume growth per species. Using data from the second and third Spanish National Forest Inventory (606 plots), volume increment models for these species were fitted. Both species displayed a similar density-growth pattern for pure and mixed stands, with a maximum volume growth at maximum density. Volume increment per occupied area was also found to be greater in mixed stands as opposed to pure stands, suggesting a species interaction with reduced levels of competition in the former. However, the total volume growth was generally lower in mixed stands since the growth rate of oak is much lower. The results highlight the expedience of favouring P. sylvestris-Q. pyrenaica mixed stands with higher proportions of pine trees in order to gain the benefits of a more complex forest whilst retaining an acceptable level of wood production. Numéro de notice : A2009-636 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009035 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08293/f08293.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72460 [article]

Exemplaires(1)

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IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Effects of climate variables on intra-annual stem radial increment in Pinus cembra (L.) along the alpine treeline ecotone / Jolanda Zimmermann in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 503 Titre : Effects of climate variables on intra-annual stem radial increment in Pinus cembra (L.) along the alpine treeline ecotone Titre original : Effets du climat sur les variation intra-annuelles de croissance radiale de Pinus cembra (L.) le long d'un écotone à la limite altitudinale de forêt alpine Type de document : Article/Communication Auteurs : Jolanda Zimmermann, Auteur ; Gerhard Wieser, Auteur ; Walter Oberhuber, Auteur Année de publication : 2009 Article en page(s) : n° 503 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] bilan hydrique [Termes IGN] dendrométrie [Termes IGN] diamètre des arbres [Termes IGN] écotone [Termes IGN] forêt subalpine [Termes IGN] phénologie [Termes IGN] Pinus cembra [Termes IGN] xylème [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Within the alpine treeline ecotone tree growth is increasingly restricted by extreme climate conditions. Although intra-annual stem growth recorded by dendrometers can be linked to climate, stem diameter increments in slow-growing subalpine trees are masked by changes in tree water status. We tested the hypothesis that intra-annual radial stem growth in Pinus cembra is influenced by different climate variables along the treeline ecotone in the Austrian Alps. Dendrometer traces were compared with dynamics of xylem cell development to date onset of cambial activity and radial stem growth in spring. Daily fluctuations in stem radius reflected changes in tree water status throughout the treeline ecotone. Extracted daily radial increments were significantly correlated with air temperature at the timberline and treeline only, where budburst, cambial activity and enlargement of first tracheids also occurred quite similarly. A close relationship was detected between radial increment and number of enlarging tracheids throughout the treeline ecotone. We conclude that (i) the relationship between climate and radial stem growth within the treeline ecotone is dependent on a close coupling to atmospheric climate conditions and (ii) initiation of cambial activity and radial growth in spring can be distinguished from stem re-hydration by histological analysis. Numéro de notice : A2009-637 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009038 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f09037/f09037.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72461 [article]

Exemplaires(1)

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IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Drought susceptibility and recovery of transplanted Quercus rubra seedlings in relation to root system morphology / Douglass F. Jacobs in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 504 Titre : Drought susceptibility and recovery of transplanted Quercus rubra seedlings in relation to root system morphology Titre original : Sensibilité à la sécheresse et reprise des semis transplantés de Quercus rubra en relation avec la morphologie racinaire Type de document : Article/Communication Auteurs : Douglass F. Jacobs, Auteur ; K. Francis Salifu, Auteur ; Anthony S. David, Auteur Année de publication : 2009 Article en page(s) : n° 504 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] écophysiologie [Termes IGN] Quercus rubra [Termes IGN] semis (sylviculture) [Termes IGN] stress hydrique [Termes IGN] système radiculaire [Termes IGN] xylème Résumé : (auteur) Transplant shock, implicated by depressed seedling physiological status associated with moisture stress immediately following planting, limits early plantation establishment. Large root volume (Rv) has potential to alleviate transplant shock because of higher root growth potential and greater access to soil water. We investigated impacts of drought and transplant Rv on photosynthetic assimilation (A), transpiration (E), stomatal conductance (gs), predawn leaf xylem water potential (ΨL), and growth of northern red oak (Quercus rubra L.) seedlings to explain mechanisms associated with susceptibility to transplant shock. One year-old barerooot seedlings were graded into four Rv categories and either well watered or subjected to drought consisting of low, medium, or high moisture stress by discontinuing irrigation at 22-day intervals for 3 months. Thereafter, all treatments were re-watered to examine recovery. Transplant shock was signified by reduced A, E, gs, and ΨL, which generally increased with increasing moisture stress and Rv. Physiological status improved during recovery, though stress was still evident in seedlings exposed to medium or high moisture stress and in larger Rv seedlings. Growth declined with increasing moisture stress but was generally similar among Rv treatments, likely reflecting greater A at the whole plant level and/or reliance upon stored reserves in large Rv seedlings. The most effective drought avoidance mechanisms were root growth, stomatal regulation, reduced leaf area, and higher growth allocation to roots relative to shoots. Our results suggest that large initial Rv does not enhance drought avoidance during the first season after transplant in northern red oak seedlings. Numéro de notice : A2009-638 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009029 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f09040/f09040.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72462 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Generation of Expressed Sequence Tags and development of microsatellite markers for Castanopsis sieboldii var. sieboldii (Fagaceae) / Saneyoshi Ueno in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 509 Titre : Generation of Expressed Sequence Tags and development of microsatellite markers for Castanopsis sieboldii var. sieboldii (Fagaceae) Titre original : Generation de marqueurs de séquences exprimées et développement de marqueurs microsatellites pour Castanopsis sieboldii var. sieboldii (Fagaceae) Type de document : Article/Communication Auteurs : Saneyoshi Ueno, Auteur ; Kyoko Aoki, Auteur ; Yoshihiko Tsumura, Auteur Année de publication : 2009 Article en page(s) : n° 509 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] arbre caducifolié [Termes IGN] Castanopsis (genre) [Termes IGN] feuillu [Termes IGN] génétique forestière [Termes IGN] Japon Résumé : (auteur) Castanopsis sieboldii var. sieboldii is an evergreen broadleaved canopy tree that grows on Honshu, Shikoku and Kyushu Islands in Japan. A closely-related, hybridizing, congener species, C. cuspidata var. cuspidata, has different leaf epidermis structure and different seed nuts morphology compared to C. sieboldii var. sieboldii. Furthermore, the habitats in which the two species grow often indicate different water requirements. Analysis of genetic diversity, using transcribed sequences, will provide a sound basis for the management of this species, allowing successful reforestation, incorporating phylogeographic conservation. In order to obtain transcripts sequences for the species and to develop transcript-based markers, we constructed and analyzed a cDNA library, surveyed microsatellite sequences within it and designed PCR primers for the microsatellites. The cDNA library was constructed using tissue from the inner bark of C. sieboldii var. sieboldii; 3354 Expressed Sequence Tags (ESTs) were identified. We constructed 2417 putative unigenes and assigned putative functions to 1856 of them. Three hundred and fourteen microsatellites were found within the putative unigenes and 16 EST-SSR (Simple Sequence Repeat) markers were developed. The EST-SSR markers developpe in this study should facilitate future analysis of the genetic diversity of this and related species. Numéro de notice : A2009-643 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009037 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08206/f08206.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72467 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Forest floor contribution to phosphorus nutrition: experimental data / Laurent Augusto in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 510 Titre : Forest floor contribution to phosphorus nutrition: experimental data Titre original : Contribution des couches holorganiques à la nutrition en phosphore : données expérimentales Type de document : Article/Communication Auteurs : Laurent Augusto, Auteur ; Christian Morel, Auteur ; David L. Achat, Auteur ; Etienne Saur, Auteur Année de publication : 2009 Article en page(s) : n° 510 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] isotope [Termes IGN] litière [Termes IGN] nutriment végétal [Termes IGN] phosphore [Termes IGN] Pinus pinaster Résumé : (auteur) Although accumulation of decomposing litter temporarily removes nutrients from active circulation, it creates a medium that is more suitable for nutrient uptake where soil conditions are unfavorable. A pot experiment was conducted using labeling of isotopically exchangeable phosphate ions of the soil and applying the dilution principle to accurately assess the contribution of the forest floor to P nutrition of maritime pine seedlings (Pinus pinaster Aït.). Three-week-old maritime pine seedlings were planted in pots containing either mineral soil (MS) or mineral soil covered with a forest floor layer (MS+FF). After 130 d, P uptake was still insignificant in the MS treatment while the P content of the seedlings in the MS+FF treatment increased tenfold with respect to the initial P content. In the latter treatment, the forest floor contributed 99.1% of the P supply to pine seedlings. The higher P uptake from the forest floor than from the mineral soil may be explained by its lower ability to retain inorganic P, which enabled a higher concentration of inorganic P to be maintained in solution. Numéro de notice : A2009-644 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009039 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08410/f08410.html Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72468 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Establishment limitation of holm oak (Quercus ilex subsp. ballota (Desf.) Samp.) in a Mediterranean savanna – forest ecosystem / Christian Smit in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 511 Titre : Establishment limitation of holm oak (Quercus ilex subsp. ballota (Desf.) Samp.) in a Mediterranean savanna – forest ecosystem Titre original : Limitation de l'installation du chêne vert (Quercus ilex subsp. ballota (Desf.) Samp.) dans un écosystème de savane forestière méditerranéenne Type de document : Article/Communication Auteurs : Christian Smit, Auteur ; Mario Díaz, Auteur ; Patrick Jansen, Auteur Année de publication : 2009 Article en page(s) : n° 511 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Ecologie [Termes IGN] forêt méditerranéenne [Termes IGN] Quercus ilex [Termes IGN] savane [Termes IGN] semis (sylviculture) Résumé : (auteur) ree recruitment in Mediterranean savannas is generally hampered, in contrast with the original oak forests where these savannas are derived from. We asked whether this difference in recruitment success can be explained by differential post-dispersal survival. For one year we monitored experimentally cached holm oak acorns in a savanna – forest ecosystem in Central Spain, and recorded cache pilferage, type of pilferer, boar rooting, seedling emergence, seedling survival and the cause of mortality. Cache pilferage was significantly lower in savanna (8%) than in forest (21%). However, the higher cache survival was more than offset by lower seedling emergence and, particularly, by nine times higher seedling mortality in savanna, mainly due to desiccation. Wild boar rooting did not differ between experimental caches and controls without acorns, indicating that individual cached acorns do not trigger rooting activity. Our results indicate that the difference in post-dispersal survival between savanna and forest is due to lower emergence and, primarily, higher seedling mortality in savanna, not to higher cache pilferage. Absence of safe sites such as shrubs, abundantly present in the forest, may well explain the lack of recruitment in the savanna. Management measures appear necessary for long-term persistence of Mediterranean savannas in general. Numéro de notice : A2009-645 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009028 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08313/f08313.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72469 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt

Variations of plant and soil 87Sr/86Sr along the slope of a tropical inselberg / Anne Poszwa in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 512 Titre : Variations of plant and soil 87Sr/86Sr along the slope of a tropical inselberg Titre original : Variation des rapports 87Sr/86Sr dans les sols et les plantes d'un inselberg tropical Type de document : Article/Communication Auteurs : Anne Poszwa, Auteur ; Bruno Ferry, Auteur ; Benoît Pollie, Auteur ; Catherine Grimaldi, Auteur ; Pierre Charles-Dominique, Auteur ; Michel Loubet, Auteur ; Etienne Dambrine, Auteur Année de publication : 2009 Article en page(s) : n° 512 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] Guyane (département français) [Termes IGN] inselberg [Termes IGN] milieu tropical [Termes IGN] montagne [Termes IGN] nutriment végétal [Termes IGN] sol [Termes IGN] strontium Résumé : (auteur) From the summit downslope a granitic inselberg in French Guiana, soils and vegetation evolve from bare granite covered by cyanobacteria, to a savannah-type vegetation on thin patchy sandy accumulations, then to a low forest on shallow young soils and to a high forest on deep highly weathered ultisols. We have used element budgets and Sr isotopic variations in soils and plants to investigate the mineral nutrient supply sources of the different plant communities. Granite and atmospheric deposition have 87Sr/86Sr ratios of 1.3 and 0.71, respectively. The 87Sr/86Sr ratio of cyanobacteria (0.72) suggests granite weathering by cyanobacteria crusts. The 87Sr/86Sr ratio of the savannah-type vegetation is 0.73 and varies between 0.75 and 0.76 in the low and high forest leaf litter regardless of soil depth, age and degree of impoverishment. These almost constant ratio suggest that forest Sr comes from rainwater and from the summit of this inselberg, where it is released and redistributed along the slope, by surface flow, lateral redistribution of litter, and mineral particles. However, because of its very low content in the rock and soils, Ca is supplied to plants by atmospheric deposition. Numéro de notice : A2009-646 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest/2009036 Date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08214/f08214.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72470 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000455	PER	Revue	Nogent-sur-Vernisson	Salle périodiques	Exclu du prêt