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Ajouter le résultat dans votre panier Faire une suggestion Affiner la recherche Interroger des sources externesCrescimento e longevidade foliar em jovens de três espécies de cecropia (cecropiaceae) do sudeste do Brasil (capitulo 3) / T.C.S. Spocito (1999)
Titre : Crescimento e longevidade foliar em jovens de três espécies de cecropia (cecropiaceae) do sudeste do Brasil (capitulo 3) Type de document : texte imprimé Auteurs : T.C.S. Spocito Editeur : Campinas : UNICAMP Année de publication : 1999 Importance : pp. 87-121., nb graph., nb tabl., 3 réf., 3 annexes Note générale : Extrait de : "Tamanho forma alometria e crescimento em algumas espècies de cecropia (cecropiaceae) do Brasil. Langues : Portugais (por) Catégories : Autres descripteurs
ANT PLANTS ; BRAZIL ; GROWTH ; MUTUALISM
Thésaurus Agrovoc
CecropiaRésumé : Cecropia glaziovii (Snethl.), C pachystachya (Trécul) and C. hololeuca (Miq.) are common pioner species in Southeastern Brazil forests. Only C. hololeuca is non myrmecophyte (no ant-association). The goal of this study was measure height and diameter growth, and leaf demography of the three species, in sapling trees (0.75 - 3.50 m height), to verify possible differences between myrmecophytic and non myrmecophytic species. The study was conducted in reserva biologica da Mata do Jambreiro, Nova Lima, MG, Brazil. In April 1996, 14-16 plants of each species were marked. Internode production and the emergence and death of new leaves were recorded monthly. Height growth was measured after one year sampling. Myrmecophytic species produced more internodes than non-myrmecophyte. Macimum height increment values were higher in myrmecophytes than in C. hololeuca, but non significative differences were found among the species medians. Internodes yr'-1 and height increment
were positive correled with monthly rainfall in all species. Leaf emregence was higher in myrmecophytes than in C. hololeuca. Leaf death was highter for C. glaziovii leaves than for the other two species. Leaves of C. hololeuca and C. pachystachya (7 meses) lived longer than C. glaziovii leaves (4 meses).Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151537 Crescimento e longevidade foliar em jovens de três espécies de cecropia (cecropiaceae) do sudeste do Brasil (capitulo 3) [texte imprimé] / T.C.S. Spocito . - Campinas (BR) : UNICAMP, 1999 . - pp. 87-121., nb graph., nb tabl., 3 réf., 3 annexes.
Extrait de : "Tamanho forma alometria e crescimento em algumas espècies de cecropia (cecropiaceae) do Brasil.
Langues : Portugais (por)
Catégories : Autres descripteurs
ANT PLANTS ; BRAZIL ; GROWTH ; MUTUALISM
Thésaurus Agrovoc
CecropiaRésumé : Cecropia glaziovii (Snethl.), C pachystachya (Trécul) and C. hololeuca (Miq.) are common pioner species in Southeastern Brazil forests. Only C. hololeuca is non myrmecophyte (no ant-association). The goal of this study was measure height and diameter growth, and leaf demography of the three species, in sapling trees (0.75 - 3.50 m height), to verify possible differences between myrmecophytic and non myrmecophytic species. The study was conducted in reserva biologica da Mata do Jambreiro, Nova Lima, MG, Brazil. In April 1996, 14-16 plants of each species were marked. Internode production and the emergence and death of new leaves were recorded monthly. Height growth was measured after one year sampling. Myrmecophytic species produced more internodes than non-myrmecophyte. Macimum height increment values were higher in myrmecophytes than in C. hololeuca, but non significative differences were found among the species medians. Internodes yr'-1 and height increment
were positive correled with monthly rainfall in all species. Leaf emregence was higher in myrmecophytes than in C. hololeuca. Leaf death was highter for C. glaziovii leaves than for the other two species. Leaves of C. hololeuca and C. pachystachya (7 meses) lived longer than C. glaziovii leaves (4 meses).Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151537 Réservation
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Titre : A critique of permanent plot methods and analysis with examples from Budongo forest, Uganda Type de document : texte imprimé Auteurs : D. Sheil Editeur : Amsterdam : Elsevier science Année de publication : 1995 Collection : Forest Ecology and Management num. 77 Importance : pp. 11-34., ill., graph., tabl., nb réf. Langues : Anglais (eng) Catégories : Autres descripteurs
TROPICAL RAIN FOREST ; FOREST DYNAMICS ; MORTALITY ; GROWTH ; RECRUITMENTRésumé : Permanent sample plot (PSP) studies play a major role in ecological and management research. Bias and error may arise in such studies at each stage of the assessment from plot establishment through to data interpretation, and can indermine confidence in the use of PSP data. This paper considers these problems and suggests how they might be identified and minimised. Examples are taken from Budongo forest, Uganda, whitch provides some of the world's longest-term PSP data from both primary and treated tropical forest (1939-1993 and 1933-1992 respectively). Three distinct types of artefact in PSP studies are recognised : errors in methodology, impact of methodology, and inappropriate analysis. Deficiencies in each aspect of plot evaluation can have considerable influence on the evaluation of change with time and of differences between sites. Each technique can be controlled and/or improved. Data correction and "harmonisation" procedures are discussed.
Interpretation of PSP data must consider the many pitfalls of assessing such complex data. Some of the central considerations in data interpretation are reviewed and critical areas are defined e.g. time period between observations influences the evaluation of dynamic quantities. Some conclusions disagree with those of other authors. The most significant factors identified (many with implication for vegetation monitoring generally) are summarised and a set of recommendations is provided.Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151456 A critique of permanent plot methods and analysis with examples from Budongo forest, Uganda [texte imprimé] / D. Sheil . - Amsterdam : Elsevier science, 1995 . - pp. 11-34., ill., graph., tabl., nb réf.. - (Forest Ecology and Management; 77) .
Langues : Anglais (eng)
Catégories : Autres descripteurs
TROPICAL RAIN FOREST ; FOREST DYNAMICS ; MORTALITY ; GROWTH ; RECRUITMENTRésumé : Permanent sample plot (PSP) studies play a major role in ecological and management research. Bias and error may arise in such studies at each stage of the assessment from plot establishment through to data interpretation, and can indermine confidence in the use of PSP data. This paper considers these problems and suggests how they might be identified and minimised. Examples are taken from Budongo forest, Uganda, whitch provides some of the world's longest-term PSP data from both primary and treated tropical forest (1939-1993 and 1933-1992 respectively). Three distinct types of artefact in PSP studies are recognised : errors in methodology, impact of methodology, and inappropriate analysis. Deficiencies in each aspect of plot evaluation can have considerable influence on the evaluation of change with time and of differences between sites. Each technique can be controlled and/or improved. Data correction and "harmonisation" procedures are discussed.
Interpretation of PSP data must consider the many pitfalls of assessing such complex data. Some of the central considerations in data interpretation are reviewed and critical areas are defined e.g. time period between observations influences the evaluation of dynamic quantities. Some conclusions disagree with those of other authors. The most significant factors identified (many with implication for vegetation monitoring generally) are summarised and a set of recommendations is provided.Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151456 Réservation
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Titre : Growth, stomatal conductance and soil-to-leaf specific hydraulic conductance of quercus petraea, pinus pinaster and betula pendula saplings grown in different substrates and submitted to drought Type de document : texte imprimé Auteurs : C. Fort ; Erwin Dreyer ; André Granier Année de publication : 1998 Importance : 5 tabl., 23 graph., 49 réf.-20 p. Langues : Anglais (eng) Catégories : Thésaurus Agrovoc
Quercus petraea ; Pinus pinaster ; Betula pendula ; Croissance ; Sécheresse ; Potentiel hydrique
Autres descripteurs
SUBSTRATE ; GROWTH ; LEAF WATER POTENTIAL ; STOMATAL CONDUCTANCE ; SOIL-TO-LEAF SPECIFIC HYDRAULIC CONDUCTANCE ; WATER STRESS ; CONDUCTANCERésumé : Plans of Quercus petraea, Pinus pinaster and Betula pendula were grown in three differnet substrates : SI, peat-sand mix (1: 2, v/v); SII, peat-sand mix (2: 1, v/v); and SIII peat-clay mix (1: 3, v/v) and submitted to drought stress. Large differences in growth and water relations were recorded among the three species. Under well-watered conditions, birch displayed higher values of stomatal conductance, of whole plant transpiration flux density, and of specific soil-to-leaf hydraulic conductivity than oak and pine. During stress, birch consumed all available water very quickly, but still displayed higher predawn leaf water potential than the 2 other species. Intense stomatal closure was recoded at higher values of predawn leaf water potential (close to -1.2 MPa) than in the two other species. At higher stress intensities, birch reduced drastically its transpiring area by leaf shedding. The clayey substrate (SIII) limited severely the growth of oaks, and
pines, but not of birches, without any apparent deficiency as evidenced by the mineral composition of the leaves. Water relations and stomatal conductance remained almost unaffected by substrate composition in the three species. With increasing water stress, the only difference observed among substrates was the time course of soil water depletion, due to differences in leaf area. Stomatal conductance and soil-to-leaf specific hydraulic conductance were well correlated in all species, but important interspecific differences occured; birches diffeed significantly from the two other species. "(Résumé des auteurs)".Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=145639 Growth, stomatal conductance and soil-to-leaf specific hydraulic conductance of quercus petraea, pinus pinaster and betula pendula saplings grown in different substrates and submitted to drought [texte imprimé] / C. Fort ; Erwin Dreyer ; André Granier . - 1998 . - 5 tabl., 23 graph., 49 réf.-20 p.
Langues : Anglais (eng)
Catégories : Thésaurus Agrovoc
Quercus petraea ; Pinus pinaster ; Betula pendula ; Croissance ; Sécheresse ; Potentiel hydrique
Autres descripteurs
SUBSTRATE ; GROWTH ; LEAF WATER POTENTIAL ; STOMATAL CONDUCTANCE ; SOIL-TO-LEAF SPECIFIC HYDRAULIC CONDUCTANCE ; WATER STRESS ; CONDUCTANCERésumé : Plans of Quercus petraea, Pinus pinaster and Betula pendula were grown in three differnet substrates : SI, peat-sand mix (1: 2, v/v); SII, peat-sand mix (2: 1, v/v); and SIII peat-clay mix (1: 3, v/v) and submitted to drought stress. Large differences in growth and water relations were recorded among the three species. Under well-watered conditions, birch displayed higher values of stomatal conductance, of whole plant transpiration flux density, and of specific soil-to-leaf hydraulic conductivity than oak and pine. During stress, birch consumed all available water very quickly, but still displayed higher predawn leaf water potential than the 2 other species. Intense stomatal closure was recoded at higher values of predawn leaf water potential (close to -1.2 MPa) than in the two other species. At higher stress intensities, birch reduced drastically its transpiring area by leaf shedding. The clayey substrate (SIII) limited severely the growth of oaks, and
pines, but not of birches, without any apparent deficiency as evidenced by the mineral composition of the leaves. Water relations and stomatal conductance remained almost unaffected by substrate composition in the three species. With increasing water stress, the only difference observed among substrates was the time course of soil water depletion, due to differences in leaf area. Stomatal conductance and soil-to-leaf specific hydraulic conductance were well correlated in all species, but important interspecific differences occured; birches diffeed significantly from the two other species. "(Résumé des auteurs)".Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=145639 Réservation
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Titre : Interactive effects of salinity and irradiance on growth : implications for amngrove forest structure along salinity gradients Type de document : texte imprimé Auteurs : M. C. Ball Editeur : Berlin [Allemagne] : Springer Verlag Année de publication : 2002 Collection : Trees num. 16 Importance : pp. 126-139., nb graph., 3 tabl., nb réf. Langues : Anglais (eng) Catégories : Autres descripteurs
GROWTH ; IRRADIANCE ; SALINITY
Thésaurus Agrovoc
Mangrove ; RégénérationType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151950 Interactive effects of salinity and irradiance on growth : implications for amngrove forest structure along salinity gradients [texte imprimé] / M. C. Ball . - Berlin (Heidelberger Platz 3 14197 BERLIN ALLEMAGNE, Allemagne) : Springer Verlag, 2002 . - pp. 126-139., nb graph., 3 tabl., nb réf.. - (Trees; 16) .
Langues : Anglais (eng)
Catégories : Autres descripteurs
GROWTH ; IRRADIANCE ; SALINITY
Thésaurus Agrovoc
Mangrove ; RégénérationType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151950 Réservation
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Titre : Long term growth and rainfall in a Ugandan moist forest : seasonal rhythms and flexing stems Type de document : texte imprimé Auteurs : D. Sheil Année de publication : 1997 Importance : pp. 121-127., graph., tabl., nb réf. Appendix. Langues : Anglais (eng) Catégories : Autres descripteurs
GROWTH ; HYDROSTATIC PRESSURE ; MOISTURE STATUS ; PERMANENT SAMPLE PLOTType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151465 Long term growth and rainfall in a Ugandan moist forest : seasonal rhythms and flexing stems [texte imprimé] / D. Sheil . - 1997 . - pp. 121-127., graph., tabl., nb réf. Appendix.
Langues : Anglais (eng)
Catégories : Autres descripteurs
GROWTH ; HYDROSTATIC PRESSURE ; MOISTURE STATUS ; PERMANENT SAMPLE PLOTType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=151465 Réservation
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