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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

Species richness occurrences-based rarefaction curves compiled for low (red), mid (green) and high (blue) classes of elevation (≤400, 400–800 and >800 m, respectively) and rainfall (≤2.5, 2.5–3.0 and >3.0 m year−1, respectively) on UM (A and B) and non-UM substrates (C and D), where α is Fisher's index and N is the total number of occurrences (the dotted line is the theoretical maximum rate of accumulation).
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PLV075F5: Species richness occurrences-based rarefaction curves compiled for low (red), mid (green) and high (blue) classes of elevation (≤400, 400–800 and >800 m, respectively) and rainfall (≤2.5, 2.5–3.0 and >3.0 m year−1, respectively) on UM (A and B) and non-UM substrates (C and D), where α is Fisher's index and N is the total number of occurrences (the dotted line is the theoretical maximum rate of accumulation).

Mentions: However occurrences-based rarefaction curves clearly attest a lower rate of species accumulation at higher classes of elevation and rainfall on both substrates (Fig. 5). Such a decrease was more pronounced on UM than on non-UM substrates. Indeed, on UM substrates, Fisher's α decreased by ∼40 % from mid to high elevation or rainfall, while on non-UM substrates it decreased by 25 and 30 % from low to high elevation and rainfall.Figure 5.


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)

Species richness occurrences-based rarefaction curves compiled for low (red), mid (green) and high (blue) classes of elevation (≤400, 400–800 and >800 m, respectively) and rainfall (≤2.5, 2.5–3.0 and >3.0 m year−1, respectively) on UM (A and B) and non-UM substrates (C and D), where α is Fisher's index and N is the total number of occurrences (the dotted line is the theoretical maximum rate of accumulation).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

PLV075F5: Species richness occurrences-based rarefaction curves compiled for low (red), mid (green) and high (blue) classes of elevation (≤400, 400–800 and >800 m, respectively) and rainfall (≤2.5, 2.5–3.0 and >3.0 m year−1, respectively) on UM (A and B) and non-UM substrates (C and D), where α is Fisher's index and N is the total number of occurrences (the dotted line is the theoretical maximum rate of accumulation).
Mentions: However occurrences-based rarefaction curves clearly attest a lower rate of species accumulation at higher classes of elevation and rainfall on both substrates (Fig. 5). Such a decrease was more pronounced on UM than on non-UM substrates. Indeed, on UM substrates, Fisher's α decreased by ∼40 % from mid to high elevation or rainfall, while on non-UM substrates it decreased by 25 and 30 % from low to high elevation and rainfall.Figure 5.

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