SciELO - Scientific Electronic Library Online

 
vol.93Comunidad de algas epibiontes en Chiton articulates (Mollusca: Polyplacophora) en el intermareal rocoso del Pacífico tropical mexicanoVariabilidad morfológica y distribución ecológica de especies del género Aulacoseira (Bacillariophyceae) en cuerpos de agua del centro de México índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista mexicana de biodiversidad

versão On-line ISSN 2007-8706versão impressa ISSN 1870-3453

Resumo

CABALLERO, Margarita et al. Testate amoebae assemblages from two tropical high-mountain lakes in central Mexico during the last ~60 years. Rev. Mex. Biodiv. [online]. 2022, vol.93, e934168.  Epub 31-Jul-2023. ISSN 2007-8706.  https://doi.org/10.22201/ib.20078706e.2022.93.4168.

Testate amoebae are bioindicators sensitive to environmental change, which show good preservation in sediments of low pH environments, such as high mountain lakes (LAM). The presence and diversity of testate amoebae were documented in surface sediments and sediment cores, dated with 210Pb, from the only 2 LAMs in Mexico (El Sol and La Luna), which have shown signs of recent human-induced changes. A total of 18 taxa were recorded and the main species observed in both lakes were Difflugia glans “glans” and D. globulosa. Specific richness and Shannon’s diversity index were higher in Lake El Sol than in the smaller, acidic and ultraoligotrophic Lake La Luna. The sediment cores recorded changes, during the last 20 to 25 years, in the composition of the testate amoebae communities (El Sol) and in their dominance (La Luna), as well as increased accumulation rate and concentrations of iron and organic carbon. These are signs of anthropogenic impact on the lakes, which should alert us to improve protection measures for these unique ecosystems, not only at the local (crater) level, but also with a more regional perspective.

Palavras-chave : Arcellinida; Protists; Paleoenvironmental reconstruction; Crater lakes; El Sol; La Luna.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )