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Henrik Balslev

Palm species richness, latitudinal gradients, sampling effort, and deforestation in the Amazon region

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Dokumenter

DOI

  • Carlos Mariano Alvez-Valles, Univ Fed Juiz de Fora, Universidade Federal de Juiz de Fora, Inst Ciencias Biol, Dept Bot
  • ,
  • Henrik Balslev
  • Roosevelt Garcia-Villacorta, Peruvian Ctr Biodivers & Conservat
  • ,
  • Fabricio Alvim Carvalho, Univ Fed Juiz de Fora, Universidade Federal de Juiz de Fora, Inst Ciencias Biol, Dept Bot
  • ,
  • Luiz Menini Neto, Univ Fed Juiz de Fora, Universidade Federal de Juiz de Fora, Inst Ciencias Biol, Dept Bot

Palms are most diverse in warm and humid regions near the equator. Though palms remain relatively well conserved, they are under increasing pressure from deforestation. Here, we analyze patterns of palm species richness relative to latitudinal gradient, sampling effort, and deforestation in the Amazon, and compare patterns of richness and floristic similarity among Amazonian sub-regions. We built a database of 17,310 records for 177 species. The areas with the greatest richness were in the western, central and northeastern Amazon, principally at latitudes 0-5 degrees S. Species richness and the number of records were highly correlated (R-2=0.76, P= 2000 km(2)) were found in the southern and eastern Amazon of Brazil, which coincide with low richness and gaps in records. Similarity analyzes resulted in two groups of sub-regions: the first included the Amazon s,s., the Andes and the Guiana, while the second included the Plateau and Gurupi. We conclude that the highest species richness is at low latitudes, and observed richness is affected by sampling effort and is vulnerable to deforestation. Therefore, areas with low species richness, especially areas with data deficiency, need to be further studied for a better understanding of their patterns of diversity and richness.

OriginalsprogEngelsk
TidsskriftActa Botanica Brasilica
Vol/bind32
Nummer4
Sider (fra-til)527-539
Antal sider13
ISSN0102-3306
DOI
StatusUdgivet - 2018

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