Structural and floristic characteristics of some monodominant and adjacent mixed rainforests in New Caledonia
Identifieur interne : 00BF35 ( Main/Exploration ); précédent : 00BF34; suivant : 00BF36Structural and floristic characteristics of some monodominant and adjacent mixed rainforests in New Caledonia
Auteurs : J. Read [Australie] ; T. Jaffré ; E. Godrie [France] ; G. S. Hope [Australie] ; J. VeillonSource :
- Journal of Biogeography [ 0305-0270 ] ; 2000-03.
Descripteurs français
- Wicri :
- topic : écologie.
English descriptors
- KwdEn :
- Aequilateralis, Austrocaledonica, Baillon, Basal, Basal area, Biogeography, Blackwell science, Brongniart, Brongniart gris, Caledonia, Caledonian, Caledonian rainforests, Caledonicum, Calophyllum caledonicum, Canopy, Clusiaceae, Connell lowman, Cunoniaceae, Diameter size classes, Dzumac, Dzumac montagne, Ecological studies, Ecology, Fagaceae, Forest grades, Forest types, Full data, Gastrolepis austrocaledonica, Grand kaori, Gris, Guillaumin, Haut, Icacinaceae, Jaffr, July, Kaori, Large trees, Lower site, Lower species richness, Lowland, Main island, Maquis, Monodominance, Monodominant, Montagne, Mouirange, Mouirange haut, Myrtaceae, Nothofagus, Nothofagus forest, Nothofagus forests, Nothofagus plots, Oristic, Oristic composition, Other studies, Pancher, Pancher sebert, Plot size, Rainforest, Rainforest plots, Randomized block anova, Richness, Selective logging, Species composition, Species diversity, Species richness, Steenis, Study site, Study sites, Subplots, Successional, Total basal area, Tropical rainforest, Tropical rainforests, Upper canopy, Uppermost canopy, Veblen, Veillon, Wakere, Yale university press.
- Teeft :
- Aequilateralis, Austrocaledonica, Baillon, Basal, Basal area, Biogeography, Blackwell science, Brongniart, Brongniart gris, Caledonia, Caledonian, Caledonian rainforests, Caledonicum, Calophyllum caledonicum, Canopy, Clusiaceae, Connell lowman, Cunoniaceae, Diameter size classes, Dzumac, Dzumac montagne, Ecological studies, Ecology, Fagaceae, Forest grades, Forest types, Full data, Gastrolepis austrocaledonica, Grand kaori, Gris, Guillaumin, Haut, Icacinaceae, Jaffr, July, Kaori, Large trees, Lower site, Lower species richness, Lowland, Main island, Maquis, Monodominance, Monodominant, Montagne, Mouirange, Mouirange haut, Myrtaceae, Nothofagus, Nothofagus forest, Nothofagus forests, Nothofagus plots, Oristic, Oristic composition, Other studies, Pancher, Pancher sebert, Plot size, Rainforest, Rainforest plots, Randomized block anova, Richness, Selective logging, Species composition, Species diversity, Species richness, Steenis, Study site, Study sites, Subplots, Successional, Total basal area, Tropical rainforest, Tropical rainforests, Upper canopy, Uppermost canopy, Veblen, Veillon, Wakere, Yale university press.
Abstract
Nothofagus spp. dominate the upper canopy of some rainforests on ultramafic soils in New Caledonia. These monodominant forests typically occur within, or contiguous with, larger areas of mixed‐canopy rainforest. In this study the structure, diversity and composition of six Nothofagus‐dominated plots were investigated, and comparisons were made with three adjacent mixed rainforest plots. Stand density and basal area (all stems ≥ 1.3 m high) in the Nothofagus plots were in the range 16,056–27,550 stems/ha and 43.1–69.9 m2/ha, respectively. There was no significant difference (P ≥ 0.05) in total stand density or basal area between the paired Nothofagus and mixed rainforests, but there were consistently fewer trees and less basal area of trees ≥ 40 cm d.b.h. in the Nothofagus forests. Species richness, species diversity (Shannon‐Wiener, based on basal area) and equitability (based on basal area) of trees ≥ 20 cm d.b.h. on 0.1 ha Nothofagus plots were in the range 4–17, 0.96–3.76 and 0.45–0.87, respectively. No significant differences (P ≥ 0.05) were recorded in these three parameters between the paired Nothofagus and mixed rainforests, although species diversity was consistently lower in the paired Nothofagus forests. Comparison of dominance by density and basal area indicated that although the uppermost canopy of the Nothofagus forests was dominated by Nothofagus (70–95%), the basal area and density contribution was ≤ 55% except at Col de Yaté (≈ 85%). Analysis of similarity indicated no significant difference in stand composition of trees ≥ 20 cm d.b.h. (following removal of Nothofagus from the data set) between Nothofagus and mixed rainforests using basal area, density or presence‐absence data. It is concluded that the Nothofagus‐dominated forests differ from the adjacent mixed rainforests mainly by (1) dominance of the uppermost canopy, without necessarily dominance of the stand by basal area or density, and (2) the smaller basal area contributed by large trees (all species).
Url:
DOI: 10.1046/j.1365-2699.2000.00407.x
Affiliations:
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Le document en format XML
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<term>Selective logging</term>
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<term>Species diversity</term>
<term>Species richness</term>
<term>Steenis</term>
<term>Study site</term>
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<term>Subplots</term>
<term>Successional</term>
<term>Total basal area</term>
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<term>Blackwell science</term>
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<term>Brongniart gris</term>
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<front><div type="abstract" xml:lang="en">Nothofagus spp. dominate the upper canopy of some rainforests on ultramafic soils in New Caledonia. These monodominant forests typically occur within, or contiguous with, larger areas of mixed‐canopy rainforest. In this study the structure, diversity and composition of six Nothofagus‐dominated plots were investigated, and comparisons were made with three adjacent mixed rainforest plots. Stand density and basal area (all stems ≥ 1.3 m high) in the Nothofagus plots were in the range 16,056–27,550 stems/ha and 43.1–69.9 m2/ha, respectively. There was no significant difference (P ≥ 0.05) in total stand density or basal area between the paired Nothofagus and mixed rainforests, but there were consistently fewer trees and less basal area of trees ≥ 40 cm d.b.h. in the Nothofagus forests. Species richness, species diversity (Shannon‐Wiener, based on basal area) and equitability (based on basal area) of trees ≥ 20 cm d.b.h. on 0.1 ha Nothofagus plots were in the range 4–17, 0.96–3.76 and 0.45–0.87, respectively. No significant differences (P ≥ 0.05) were recorded in these three parameters between the paired Nothofagus and mixed rainforests, although species diversity was consistently lower in the paired Nothofagus forests. Comparison of dominance by density and basal area indicated that although the uppermost canopy of the Nothofagus forests was dominated by Nothofagus (70–95%), the basal area and density contribution was ≤ 55% except at Col de Yaté (≈ 85%). Analysis of similarity indicated no significant difference in stand composition of trees ≥ 20 cm d.b.h. (following removal of Nothofagus from the data set) between Nothofagus and mixed rainforests using basal area, density or presence‐absence data. It is concluded that the Nothofagus‐dominated forests differ from the adjacent mixed rainforests mainly by (1) dominance of the uppermost canopy, without necessarily dominance of the stand by basal area or density, and (2) the smaller basal area contributed by large trees (all species).</div>
</front>
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