The relative performance of taxonomic vs. environmental indicators for local biodiversity assessment: A comparative study

Yael Mandelik*, Tamar Dayan, Vladimir Chikatunov, Vasiliy Kravchenko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Direct diversity measurements usually require more resources and knowledge than those available, so surrogates are needed. The two main types of surrogates are environmental indicators, physical characteristics of the environment, and taxonomic indicators, a taxon or subsets of taxa used to reflect other taxa in the ecosystem. The relative merit of these two surrogate types, though hotly debated, has rarely been investigated directly. Here we compared the relative efficacy of environmental vs. taxonomic indicators in representing local scale patterns of species richness, rarity, endemism, and composition. The study was conducted in the Mediterranean ecosystem of the Jerusalem Mountains and the Judean Foothills, Israel. A detailed study of eight taxa (vascular plants, ground dwelling beetles, moths, spiders, scorpions, diplopods, small mammals, and small reptiles) and of coarse-resolution habitat types and fine-resolution environmental indicators was conducted in 40, 1000 m2 plots representing the different habitats in the region. Fine-resolution environmental indicators generally outperformed taxonomic indicators in reflecting diversity patterns, but their performance varied considerably between taxa and diversity measures, and on average they conveyed less than 55% of the variation in diversity patterns. Coarse-resolution habitat types failed to reflect diversity patterns. Plant species richness contributed to representation of diversity patterns of some taxa, but it needs to be combined with structural aspects of the vegetation in order to improve prediction power and expand the diversity aspects addressed. Composition patterns were poorly represented by either indicator used. We conclude that fine-resolution environmental indicators are suitable for general indication of local richness, rarity, and endemism patterns in Mediterranean ecosystems. Mapping these patterns at high resolution requires direct detailed surveys, or the application of other indicators.

Original languageAmerican English
Pages (from-to)171-180
Number of pages10
JournalEcological Indicators
Volume15
Issue number1
DOIs
StatePublished - Apr 2012

Bibliographical note

Funding Information:
We thank A. Landesman for his help in field work, Y. Waisel and Y. Tankus for their assistance in plant identification, L. Friedman for his assistance in the identification of beetles, and the thoughtful comments of two anonymous reviewers who helped improve this manuscript. This research was supported by the Israeli Ministry of the Environment (Grant 706-2 ) and the Jerusalem Institute for Israel Studies .

Keywords

  • Biodiversity survey
  • Environmental indicator
  • Indicator taxa
  • Local scale
  • Mediterranean ecosystem
  • Surrogate taxa

Fingerprint

Dive into the research topics of 'The relative performance of taxonomic vs. environmental indicators for local biodiversity assessment: A comparative study'. Together they form a unique fingerprint.

Cite this