A test of traditional diversity measures and taxonomic distinctness indices on benthic diatoms of soda pans in the Carpathian basin

C. Stenger-Kovács, Hajnal, E. Lengyel, K. Buczkó, J. Padisák

Research output: Article

16 Citations (Scopus)

Abstract

Saline lakes are threatened all over the world and their conservation has been a key issue. Various diversity indices are available for ecological status assessments, however, with poorly explored relevance and applicability in saline, alkaline pans. Therefore, traditional diversity measures (species richness and Shannon diversity) and taxonomic distinctness indices (Average [AvTD] and Variance of Taxonomic Distinctness [VarTD]) were tested in more than 100 sampling sites of 39 soda pans in Central-Europe to find sufficient indicators of the ecological condition and simultaneously to facilitate their preservation according to the modern conservation practices. Results of the analyses showed that healthy soda pan ecosystems with high level of natural stress and reduced habitat heterogeneity are characterized by low diversity diatom assemblages. In soda pans where the stress can be extremely high from natural reasons, oligopoly of closely related species can develop: the average taxonomic distinctness appeared between genus and family level. The non-DNA-sequence based phylogenetic diversity measures (AvTD and VarTD), were generally sensitive to the trophic state of the lakes, in contrast to traditional diversity metrics, which were unequivocally indicative for the special physical and chemical parameters (e.g. conductivity, pH) of the soda pans. In some cases, when the response of the diversity measures for a given environmental variable (pH, temperature) overlapped, the AvTD was found to be a more precise indicator of the environmental changes (pH) than traditional ones. The decreasing tendency of the AvTD along the intensified natural impact may be explained by the long available time for the species to adapt to these special environments.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalEcological Indicators
Volume64
DOIs
Publication statusPublished - máj. 1 2016

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Bacillariophyceae
diatom
basins
oligopoly
saline lake
diversity index
basin
lakes
environmental change
environmental indicators
conductivity
conservation practices
species richness
testing
phylogenetics
Central European region
ecosystem
lake
sampling
habitat

ASJC Scopus subject areas

  • Ecology
  • Decision Sciences(all)
  • Ecology, Evolution, Behavior and Systematics

Cite this

A test of traditional diversity measures and taxonomic distinctness indices on benthic diatoms of soda pans in the Carpathian basin. / Stenger-Kovács, C.; Hajnal; Lengyel, E.; Buczkó, K.; Padisák, J.

In: Ecological Indicators, Vol. 64, 01.05.2016, p. 1-8.

Research output: Article

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