Environmental Factors Affecting Distribution of Caddisfly (Trichoptera) Larvae in Mountain Streams of Northeastern Turkey


INLAND WATER BIOLOGY, vol.14, no.5, pp.581-589, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 5
  • Publication Date: 2021
  • Doi Number: 10.1134/s1995082921050047
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, CAB Abstracts, Geobase, Veterinary Science Database
  • Page Numbers: pp.581-589
  • Keywords: biomonitoring, Caucasus biodiversity hotspot, northeastern Anatolia, riparian forest, AQUATIC INSECTS, COMMUNITIES, DIVERSITY, SUBSTRATE, GRADIENT, REVISION, MALICKY, ECOLOGY, EASTERN, TRAITS
  • Hacettepe University Affiliated: Yes


Trichoptera is one of the most important components of freshwaters used in biomonitoring studies to determine the different degradations in aquatic ecosystems. Though such works are necessary, there is a huge gap in ecological studies on Trichoptera larvae in northeastern Turkey. We examined the effects of some environmental variables on the distribution of caddisfly larvae inhabiting the streams arising above the tree line. To determine the relationships between larvae distribution and environmental variables (riparian forest, riparian vegetation, stream size -width-, altitude, pH, substrate, electrical conductivity, temperature, dissolved oxygen), 66 sites were selected from five different streams (Aksu, Degirmendere, Solakli, Iyidere, Firtina) in 2008, 2009, and 2011. In total, 22 caddisfly genera belonging to 13 Trichoptera families were identified. It was found that riparian forest was the most important variable affecting the distribution of caddisfly larvae in open canopy headwater streams. Larvae exhibiting shredder feeding behavior were found both in the stations above and below the tree line. It is supposed that shredders can utilize both allochthonous materials coming from trees and riparian vegetation. Since this region is a biodiversity hotspot, it is becoming increasingly important to determine the ecological preferences of macroinvertebrates as soon as possible to use them in biomonitoring studies in the future.