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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

Environmental representativeness of occurrences on UM (A) and non-UM substrates (B) and geographical projection of no-data cells (C). Cells in red and green do not contain data. Cells in red are under-represented in our dataset and so are priorities for future botanical surveys to improve the knowledge of species distribution.
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PLV075F3: Environmental representativeness of occurrences on UM (A) and non-UM substrates (B) and geographical projection of no-data cells (C). Cells in red and green do not contain data. Cells in red are under-represented in our dataset and so are priorities for future botanical surveys to improve the knowledge of species distribution.

Mentions: Figure 3A and B shows under- and over-represented regions of the environmental space. On both substrates, below 500 m elevation and 2 m year−1 rainfall, occurrences were under-represented with regard to the relative rainforest surfaces. When projected on a map, under-represented areas covered 1873 km2 of rainforests (i.e. 57 % of the total rainforest area) including 975 km2 (52 %) on UM substrates (Fig. 3C). The number of occurrences in under-represented areas was in two-thirds of the grid-cells (no-data cells) and ranged from 1 to 1405 in the other third. Among major orographic massifs with no-data cells, those presenting an over-represented environment include ‘Colnett’, ‘Me Maoya’ or ‘Saint Vincent’ while those with an under-represented environment include ‘Mandjelia/Balade’, ‘Tonine/Gaitada’ ‘Forêt plate’, ‘Source Neaoua’, ‘Karagreu/Boreare’ and ‘Kouakoué’.Figure 3.


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)

Environmental representativeness of occurrences on UM (A) and non-UM substrates (B) and geographical projection of no-data cells (C). Cells in red and green do not contain data. Cells in red are under-represented in our dataset and so are priorities for future botanical surveys to improve the knowledge of species distribution.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

PLV075F3: Environmental representativeness of occurrences on UM (A) and non-UM substrates (B) and geographical projection of no-data cells (C). Cells in red and green do not contain data. Cells in red are under-represented in our dataset and so are priorities for future botanical surveys to improve the knowledge of species distribution.
Mentions: Figure 3A and B shows under- and over-represented regions of the environmental space. On both substrates, below 500 m elevation and 2 m year−1 rainfall, occurrences were under-represented with regard to the relative rainforest surfaces. When projected on a map, under-represented areas covered 1873 km2 of rainforests (i.e. 57 % of the total rainforest area) including 975 km2 (52 %) on UM substrates (Fig. 3C). The number of occurrences in under-represented areas was in two-thirds of the grid-cells (no-data cells) and ranged from 1 to 1405 in the other third. Among major orographic massifs with no-data cells, those presenting an over-represented environment include ‘Colnett’, ‘Me Maoya’ or ‘Saint Vincent’ while those with an under-represented environment include ‘Mandjelia/Balade’, ‘Tonine/Gaitada’ ‘Forêt plate’, ‘Source Neaoua’, ‘Karagreu/Boreare’ and ‘Kouakoué’.Figure 3.

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