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Environmental correlates for tree occurrences, species distribution and richness on a high-elevation tropical island.

Birnbaum P, Ibanez T, Pouteau R, Vandrot H, Hequet V, Blanchard E, Jaffré T - AoB Plants (2015)

Bottom Line: The observed species richness was driven mainly by the density of occurrences.However, at the highest elevations or rainfalls, and particularly on UM, the observed richness tends to be lower, independently of the sampling effort.Projected onto a map, under-represented areas are a guide as to where future sampling efforts are most required to complete our understanding of rainforest tree species distribution.

View Article: PubMed Central - PubMed

Affiliation: CIRAD, UMR 51 AMAP, 34398 Montpellier, France Laboratory of Applied Botany and Plant Ecology, Institut Agronomique néo-Calédonien (IAC), Diversité biologique et fonctionnelle des écosystèmes terrestes, 98848 Noumea, New Caledonia birnbaum@cirad.fr.

No MeSH data available.


Related in: MedlinePlus

Distribution of the number of tree occurrences (N), the number of species or γ-diversity (R), number of intercepted cells on a 1 min-resolution grid (G) and the occurrences/cells ratio (N/G) within each dataset and the resulting α-diversity computed for overall occurrences by 1-min cell (1.852 × 1.852 km).
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PLV075F1: Distribution of the number of tree occurrences (N), the number of species or γ-diversity (R), number of intercepted cells on a 1 min-resolution grid (G) and the occurrences/cells ratio (N/G) within each dataset and the resulting α-diversity computed for overall occurrences by 1-min cell (1.852 × 1.852 km).

Mentions: Tree occurrences were distributed into 1213 cells of a regular 1-min grid, which covers ∼22 % of New Caledonia's main island (Fig. 1). Occurrence density ranged from 1 to 1405 per grid-cell (32 on average, ±2 standard error). Occurrences from the plot inventory dataset were the most aggregated data, occurring in only 68 cells with an average of 109 occurrences ±18 per grid-cell. The next most aggregated dataset was of observations (340 grid-cells and 54 occurrences ±5 per grid-cell). This was followed by herbarium specimens (1073 grid-cells and 11 occurrences ±1 per grid-cell) and, last, photographs (156 grid-cells and 8 occurrences ±1 per grid-cell).Figure 1.


Environmental correlates for tree occurrences, species distribution and richness on a high-elevation tropical island.

Birnbaum P, Ibanez T, Pouteau R, Vandrot H, Hequet V, Blanchard E, Jaffré T - AoB Plants (2015)

Distribution of the number of tree occurrences (N), the number of species or γ-diversity (R), number of intercepted cells on a 1 min-resolution grid (G) and the occurrences/cells ratio (N/G) within each dataset and the resulting α-diversity computed for overall occurrences by 1-min cell (1.852 × 1.852 km).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4561634&req=5

PLV075F1: Distribution of the number of tree occurrences (N), the number of species or γ-diversity (R), number of intercepted cells on a 1 min-resolution grid (G) and the occurrences/cells ratio (N/G) within each dataset and the resulting α-diversity computed for overall occurrences by 1-min cell (1.852 × 1.852 km).
Mentions: Tree occurrences were distributed into 1213 cells of a regular 1-min grid, which covers ∼22 % of New Caledonia's main island (Fig. 1). Occurrence density ranged from 1 to 1405 per grid-cell (32 on average, ±2 standard error). Occurrences from the plot inventory dataset were the most aggregated data, occurring in only 68 cells with an average of 109 occurrences ±18 per grid-cell. The next most aggregated dataset was of observations (340 grid-cells and 54 occurrences ±5 per grid-cell). This was followed by herbarium specimens (1073 grid-cells and 11 occurrences ±1 per grid-cell) and, last, photographs (156 grid-cells and 8 occurrences ±1 per grid-cell).Figure 1.

Bottom Line: The observed species richness was driven mainly by the density of occurrences.However, at the highest elevations or rainfalls, and particularly on UM, the observed richness tends to be lower, independently of the sampling effort.Projected onto a map, under-represented areas are a guide as to where future sampling efforts are most required to complete our understanding of rainforest tree species distribution.

View Article: PubMed Central - PubMed

Affiliation: CIRAD, UMR 51 AMAP, 34398 Montpellier, France Laboratory of Applied Botany and Plant Ecology, Institut Agronomique néo-Calédonien (IAC), Diversité biologique et fonctionnelle des écosystèmes terrestes, 98848 Noumea, New Caledonia birnbaum@cirad.fr.

No MeSH data available.


Related in: MedlinePlus