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Botanical Sciences
versão On-line ISSN 2007-4476versão impressa ISSN 2007-4298
Resumo
LEYVA-CASTANEDA, Diego; SIGALA-RODRIGUEZ, Jesús e OCAMPO, Gilberto. Species richness estimation of the Asteraceae family in four areas for conservation from central Mexico using non-parametric methods to measure biodiversity. Bot. sci [online]. 2020, vol.98, n.2, pp.317-327. Epub 03-Set-2020. ISSN 2007-4476. https://doi.org/10.17129/botsci.2552.
Background:
The Asteraceae is the family with the highest number of angiosperm species (24,000 - 33,000). Despite this diversity, information on richness and distribution of the group for conservation purposes in central Mexico is scarce.
Hypothesis:
The use of non-parametric methods to measure Asteraceae species diversity will allow to obtain information to promote the conservation of some areas in central Mexico.
Studied species:
Species of the Asteraceae in four priority conservation areas in central Mexico.
Study area and dates:
Four priority conservation areas mainly located in the state of Aguascalientes: Sierra Fría, Sierra del Laurel, Tepezalá-Asientos, and Juan El Grande (2016 to 2019).
Methods:
Non-parametric methods ICE and Chao2 to estimate species richness were employed and a species accumulation curve was obtained. A species richness map was made in a 5 × 5 km grid to identify quadrants with high species richness. β-diversity was calculated to measure differences in composition, nesting, and species turnover among areas.
Results:
ICE and Chao2 estimators indicate an overestimation of the observed species richness. The degree of completeness of the floristic inventory for Asteraceae in the study areas is 62 % for ICE and 64 % for Chao2. β-diversity indicates high turnover and species lost among areas.
Conclusions:
Richness and β-diversity obtained are the result of the species grouping spatial pattern, presence of exclusive species by area, and the ecological properties and preferences of the group.
Palavras-chave : Aguascalientes; β-diversity; Chao2; Incidence-based coverage estimator; Species accumulation curve.