Manioc : Portail | resultats 1 - 20 pour la recherche: size-standardized growth rate

Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848, Part. 4
Auteur(s) : Grande Bretagne. House of commons. Library
Année de publication :

| Plus

Narrative of a five years' expedition against the revolted negroes of Surinam in Guiana, on the wild coast of South America from the year 1772 to 1777, elucidating the history of that country and describing its productions... with an account of the Indians of Guiana and negroes of Guinea... Tome 2
Auteur(s) : Stedman, John Gabriel (1744-1797)
Année de publication :

| Plus

The colony of British Guyana and its labouring population
Auteur(s) : Bronkhurst, Rév. H.V.P.
Année de publication :

| Plus

Speeches of Henry Lord Brougham, upon questions relating to Publics Rights, Duties, and Interests
Auteur(s) : Brougham, Henry (1778-1868)
Année de publication :

| Plus

Notes on Haïti, made during a residence in that republic : in two volumes. Volume 1
Auteur(s) : Mackenzie, Charles (1788-1862)
Année de publication :

| Plus

The West Indies
Auteur(s) : Eves, Charles Washington Augero (1838-1899)
Année de publication :

| Plus

Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 2
Auteur(s) : Grande Bretagne. House of commons. Library
Année de publication :

| Plus

Complete story of the Martinique and St. Vincent horrors
Auteur(s) : Garesche, William A. (1852-1905)
Auteurs secondaires : Demessimy, Vincent (18..-1)
Année de publication :

| Plus

Six months in the West Indies, in 1825
Auteur(s) : Coleridge, Henry Nelson (1798-1843)
Année de publication :

| Plus

Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 1
Auteur(s) : Grande Bretagne. House of commons. Library
Année de publication :

| Plus

Globally, functional traits are weak predictors of juvenile tree growth, and we do not know why
Auteur(s) : Paine, C. E. Timothy Amissah, Lucy Auge, Harald Baraloto, Christopher Baruffol, Martin Bourland, Nils Bruelheide, Helge Danou, Kasso
Auteurs secondaires : Biological and environmental sciences ; University of Stirling Wageningen University and Research Centre [Wageningen] (WUR) Forestry Research Institute of Ghana Helmholtz Centre for Environmental Research - UFZ (GERMANY) German Institute for Integrative Biodiversity Research (iDiv) Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Université de Guyane (UG) - Centre National de la Recherche Scientifique (CNRS) Florida International University (FIU) University of Zürich [Zürich] (UZH)

Éditeur(s) : HAL CCSD Wiley
Résumé : [b]1.[/b] Plant functional traits, in particular specific leaf area (SLA), wood density and seed mass, are often good predictors of individual tree growth rates within communities. Individuals and species with high SLA, low wood density and small seeds tend to have faster growth rates.[br/][br/][b]2.[/b] If community-level relationships between traits and growth have general predictive value, then similar relationships should also be observed in analyses that integrate across taxa, biogeographic regions and environments. Such global consistency would imply that traits could serve as valuable proxies for the complex suite of factors that determine growth rate, and, therefore, could underpin a new generation of robust dynamic vegetation models. Alternatively, growth rates may depend more strongly on the local environment or growth–trait relationships may vary along environmental gradients.[br/][br/][b]3.[/b] We tested these alternative hypotheses using data on 27 352 juvenile trees, representing 278 species from 27 sites on all forested continents, and extensive functional trait data, 38% of which were obtained at the same sites at which growth was assessed. Data on potential evapotranspiration (PET), which summarizes the joint ecological effects of temperature and precipitation, were obtained from a global data base.[br/][br/][b]4.[/b] We estimated size-standardized relative height growth rates (SGR) for all species, then related them to functional traits and PET using mixed-effect models for the fastest growing species and for all species together.[br/][br/][b]5.[/b] Both the mean and 95th percentile SGR were more strongly associated with functional traits than with PET. PET was unrelated to SGR at the global scale. SGR increased with increasing SLA and decreased with increasing wood density and seed mass, but these traits explained only 3.1% of the variation in SGR. SGR–trait relationships were consistently weak across families and biogeographic zones, and over a range of tree statures. Thus, the most widely studied functional traits in plant ecology were poor predictors of tree growth over large scales.[br/][br/][b]6.[/b] Synthesis. We conclude that these functional traits alone may be unsuitable for predicting growth of trees over broad scales. Determining the functional traits that predict vital rates under specific environmental conditions may generate more insight than a monolithic global relationship can offer.
ISSN: 0022-0477

hal-01204226
https://hal.archives-ouvertes.fr/hal-01204226
DOI : 10.1111/1365-2745.12401
PRODINRA : 307144

| Plus

Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 3
Auteur(s) : Grande Bretagne. House of commons. Library
Année de publication :

| Plus

The Lesser Antilles
Auteur(s) : Davis, William Morris (1850-1934)
Année de publication :

| Plus

A natural history of Nevis, and the rest of the English Leeward Charibee Islands in America : with many other observations on nature and art : particularly, an introduction to the art of decyphering
Auteur(s) : Smith, William (17..-1... ; révérend)
Année de publication :

| Plus

A voyage to the Demerary : containing a statistical account of the settlements there, and of those on the Essequebo, the Berbice, and others contiguous rivers of Guyana
Auteur(s) : Bolingbroke, Henry (1785-1855)
Année de publication :

| Plus

The history, civil and commercial, of the British colonies in the West Indies. Volume II
Auteur(s) : Edwards, Bryan (1743-1800)
Année de publication :

| Plus

Antigua and the Antiguans: a full account of the colony and its inhabitants from the time of the Caribs to the present day, interspersed with anecdotes and legends : also, an impartial view of slavery and the free labour systems, the statistics of the island, and biographical notices of the principal families, Volume 2
Année de publication :

| Plus

Four years' residence in the West Indies
Auteur(s) : Bayley, Frederic William Naylor (1808-1853)
Auteurs secondaires : Haghe, Charles (1810-1888) Day, William (1797-1845)
Année de publication :

| Plus

The civil and natural History of Jamaica. In three parts. Containing, I. An accurate description of that island, its situation and soil ; with a brief account of its former and present State, Government, Revenues, Produce, and Trade. II. A history of the natural productions, including the various sorts of native fossils ; perfect and impercfect begetables ; quadrupedes, birds, fishes, reptiles and insects ; with their properties and uses in mechanics, diet, and physic. III. An account of the nature of climates in general, and their different effects upon the human body ; with a detail of the diseases arising from this source, particularly within the Tropics. In three dissertations. The whole illustrated with fifty copper-plates : in which the most curious productions are represented of the natural size, and delineated immediately from the objects
Auteur(s) : Browne, Patrick (1720-1790)
Année de publication :

| Plus

Guiana : British, Dutch, and French
Auteur(s) : Rodway, James (1848-1926)
Année de publication :

| Plus