Seasonal dynamics of benthic macroinvertebrate assemblages and water quality in Lake Sapanca (Türkiye): A multimetric assessment

Koşal Şahin S., Taş Divrik M.

OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES, cilt.55, sa.3, ss.344-360, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55 Sayı: 3
  • Basım Tarihi: 2026
  • Doi Numarası: 10.26881/oahs-2026.1.25
  • Dergi Adı: OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES
  • Derginin Tarandığı İndeksler: Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Earth, Atmospheric, & Aquatic Science Collection (ProQuest), Scopus, Science Citation Index Expanded (SCI-EXPANDED), BIOSIS, Central & Eastern European Academic Source (CEEAS), Geobase, CAB Abstracts, Directory of Open Access Journals, Zoological Record
  • Sayfa Sayıları: ss.344-360
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

This study examined spatial and seasonal variation

of benthic macroinvertebrate assemblages in Lake

Sapanca, based on samples from five stations during

spring, summer, and autumn 2020, and winter 2021.

Physicochemical parameters, including pH, electrical

conductivity (EC), dissolved oxygen (DO), depth, NO2-N,

NO3-N, PO4-P, and total phosphorus, were measured to

assess their influence on community structure. In total,

31 taxa from Ephemeroptera, Coleoptera, Isopoda,

Gastropoda, Oligochaeta, and Chironomidae were

identified, with an average density of 1422 individuals ·

m−2. The Nitrate Pollution Index indicated no nitraterelated

pollution across stations or seasons. Bray-Curtis

analysis showed the highest similarity (96.80%) between

summer and autumn, reflecting stable communities

during these periods. Spearman correlation revealed a

positive relationship between temperature and EC, while

NO3-N was negatively correlated with temperature and

PO4-P. Canonical correspondence analysis (CCA) showed

that macroinvertebrate distribution was influenced by

temperature and nutrient gradients. Biological indices,

including Biological Monitoring Working Party (BMWP;

Spainsh version), Margalef diversity index, and ecological

quality ratio (EQR), revealed spatial differences among

stations. Station 1 had the highest ecological quality;

Stations 3 and 4 were classified as “good,” and the

remaining stations as “moderate.” Overall, Lake Sapanca

shows conditions ranging from moderate to good,

providing a baseline for long-term monitoring and

sustainable management.