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Plant functional types: are we getting any closer to the holy grail? / Sandra Lavorel (2007)

Public Citation est un extrait de Terrestrial ecosystems in a changing world / Josep G. Canadell (2007) Titre : Plant functional types: are we getting any closer to the holy grail? Type de document : Extrait d'ouvrage Auteurs : Sandra Lavorel (1965-) ; Sandra Díaz ; Johannes H. C. Cornelissen ; Eric Garnier (1959-) ; Sandy P. Harrison ; Sue McInthyre ; Juli G. Pausas ; Natalia Pérez-Harguindeguy ; Catherine Roumet ; Carlos Urcelay Editeur : Springer- Verlag Année de publication : 2007 Importance : p. 149-164 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes [CBNPMP-Thématique] Revégétalisation Lien pérenne : DOI : 10.1007/978-3-540-32730-1_13 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149440 Lavorel, Sandra (1965-), Díaz, Sandra, Cornelissen, Johannes H. C., Garnier, Eric (1959-), Harrison, Sandy P., McInthyre, Sue, Pausas, Juli G., Pérez-Harguindeguy, Natalia, Roumet, Catherine, Urcelay, Carlos 2007 Plant functional types: are we getting any closer to the holy grail? In: Terrestrial ecosystems in a changing world. Springer, Berlin: 149-164.

Root functional parameters along a land-use gradient: evidence of a community-level economics spectrum / Iván Prieto in Journal of ecology, 103 (2015) 

Public Citation [article]  inJournal of ecology > 103 (2015) . - 361-373 Titre : Root functional parameters along a land-use gradient: evidence of a community-level economics spectrum Type de document : Imprimé Auteurs : Iván Prieto ; Catherine Roumet ; Remi Cardinael ; Christian Dupraz ; Christian Jourdan ; John H. Kim ; Jean Luc Maeght ; Zhun Mao ; Alain Pierret ; Noelia Portillo ; Olivier Roupsard ; Chantanousone Thammahacksa ; Alexia Stockes Année de publication : 2015 Article en page(s) : 361-373 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Restauration des écosystèmes [CBNPMP-Thématique] Revégétalisation Résumé : 1 There is a fundamental trade-off between leaf traits associated with either resource acquisition or resource conservation. This gradient of trait variation, called the economics spectrum, also applies to fine roots, but whether it is consistent for coarse roots or at the plant community level remains untested. 2 We measured a set of morphological and chemical root traits at a community level (functional parameters; FP) in 20 plant communities located along land-use intensity gradients and across three climatic zones (tropical, mediterranean and montane). We hypothesized (i) the existence of a root economics spectrum in plant communities consistent within root types (fine, < 2 mm; coarse, 2–5 mm), (ii) that variations in root FP occur with soil depths (top 20 cm of soil and 100–150 cm deep) and (iii) along land-use gradients. Root FP covaried, in line with the resource acquisition–conservation trade-off, from communities with root FP associated with resource acquisition (e.g. high specific root length, SRL; thin diameters and low root dry matter contents, RDMC) to root FP associated with resource conservation (e.g. low SRL, thick diameters and high RDMC). This pattern was consistent for both fine and coarse roots indicating a strong consistency of a trade-off between resource acquisition and conservation for plant roots. 3 Roots had different suites of traits at different depths, suggesting a disparity in root function and exploitation capacities. Shallow, fine roots were thinner, richer in nitrogen and with lower lignin concentrations associated with greater exploitation capacities compared to deep, fine roots. Shallow, coarse roots were richer in nitrogen, carbon and soluble concentrations than deep, coarse roots. 4 Fine root parameters of highly disturbed, herbaceous-dominated plant communities in poorer soils were associated with foraging strategies, that is greater SRL and lower RDMC and lignin concentration than those from less disturbed communities. Coarse roots, however, were less sensitive to the land-use gradient. 5 Synthesis. This study demonstrates the existence of a general trade-off in root construction at a community level, which operates within all root types, suggesting that all plant tissues are controlled by the trade-off between resource acquisition and conservation. Lien pérenne : DOI : 10.1111/1365-2745.12351 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148818 Prieto, Iván, Roumet, Catherine, Cardinael, Remi, Dupraz, Christian, Jourdan, Christian, Kim, John H., Maeght, Jean Luc, Mao, Zhun, Pierret, Alain, Portillo, Noelia, Roupsard, Olivier, Thammahacksa, Chantanousone, Stockes, Alexia 2015 Root functional parameters along a land-use gradient: evidence of a community-level economics spectrum. Journal of ecology, 103: 361-373.

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Consultable Article (2015) URL

Specific leaf area and dry matter content estimate thickness in laminar leaves / Denis Vile in Annals of Botany, 96 (2005) 

Public Citation [article]  inAnnals of Botany > 96 (2005) . - 1129-1136 Titre : Specific leaf area and dry matter content estimate thickness in laminar leaves Type de document : Imprimé Auteurs : Denis Vile (1977-) ; Eric Garnier (1959-) ; Bill Shipley (1960-) ; Gérard Laurent ; Marie-Laure Navas ; Catherine Roumet ; Sandra Lavorel (1965-) ; Sandra Díaz ; John Gavin Hodgson (1945-) ; Francisco Lloret ; Guy F. Midgley ; Hendrik Poorter ; Mike C. Rutherford ; Peter J. Wilson ; Ian J. Wright Année de publication : 2005 Article en page(s) : 1129-1136 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Revégétalisation Résumé : Background and Aims Leaf thickness plays an important role in leaf and plant functioning, and relates to a species' strategy of resource acquisition and use. As such, it has been widely used for screening purposes in crop science and community ecology. However, since its measurement is not straightforward, a number of estimates have been proposed. Here, the validity of the (SLA × LDMC)−1 product is tested to estimate leaf thickness, where SLA is the specific leaf area (leaf area/dry mass) and LDMC is the leaf dry matter content (leaf dry mass/fresh mass). SLA and LDMC are two leaf traits that are both more easily measurable and often reported in the literature. Methods The relationship between leaf thickness (LT) and (SLA × LDMC)−1 was tested in two analyses of covariance using 11 datasets (three original and eight published) for a total number of 1039 data points, corresponding to a wide range of growth forms growing in contrasted environments in four continents. Key Results and Conclusions The overall slope and intercept of the relationship were not significantly different from one and zero, respectively, and the residual standard error was 0·11. Only two of the eight datasets displayed a significant difference in the intercepts, and the only significant difference among the most represented growth forms was for trees. LT can therefore be estimated by (SLA × LDMC)−1, allowing leaf thickness to be derived from easily and widely measured leaf traits. Lien pérenne : DOI : 10.1093/aob/mci264 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150726 Vile, Denis (1977-), Garnier, Eric (1959-), Shipley, Bill (1960-), Laurent, Gérard, Navas, Marie-Laure, Roumet, Catherine, Lavorel, Sandra (1965-), Díaz, Sandra, Hodgson, John Gavin (1945-), Lloret, Francisco, Midgley, Guy F., Poorter, Hendrik, Rutherford, Mike C., Wilson, Peter J., Wright, Ian J. 2005 Specific leaf area and dry matter content estimate thickness in laminar leaves. Annals of Botany, 96: 1129-1136.

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Consultable Article (2005) URL

A standardized protocol for the determination of specific leaf area and leaf dry matter content / Eric Garnier in Functional Ecology, 15 (5) (2001) 

Public Citation [article]  inFunctional Ecology > 15 (5) (2001) . - 688-695 Titre : A standardized protocol for the determination of specific leaf area and leaf dry matter content Type de document : Imprimé Auteurs : Eric Garnier (1959-) ; Bill Shipley (1960-) ; Catherine Roumet ; Gérard Laurent Année de publication : 2001 Article en page(s) : 688-695 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Revégétalisation Résumé : The impact of sample preparation, rehydration procedure and time of collection on the determination of specific leaf area (SLA, the ratio of leaf area to leaf dry mass) and leaf dry matter content (LDMC, the ratio of leaf dry mass to fresh mass) of mature leaves was studied in three wild species growing in the field, chosen for their contrasting SLA and LDMC. Complete rehydration was achieved 6 h after samples were placed into water, but neither of the procedures tested – preparation of samples before rehydration or temperature applied during rehydration – had a significant effect on the final values of SLA or LDMC. As expected, water-saturated leaves had a lower LDMC than non-rehydrated leaves; more surprisingly, their SLA was also higher. The impact of rehydration on SLA was especially important when the SLA of the species was high. There was no significant effect of time of sampling on either trait in any species over the time period covered (09·00–16·30 h). These results suggest that SLA and LDMC obtained on water-saturated leaves (SLASAT and LDMCSAT) can be used for species comparisons. We propose a standardized protocol for the measurement of these traits. This would allow for better consistency in data collection, a prerequisite for the constitution of large databases of functional traits. Lien pérenne : DOI : 10.1046/j.0269-8463.2001.00563.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150724 Garnier, Eric (1959-), Shipley, Bill (1960-), Roumet, Catherine, Laurent, Gérard 2001 A standardized protocol for the determination of specific leaf area and leaf dry matter content. Functional Ecology, 15(5): 688-695.

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Consultable Article (2001) URL