Trophic Pathways from Pelagic and Littoral Sources Supports Food Web in an Eutrophic Natural Lake (Lake Zinav, Turkey)


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BUHAN E., KAYMAK N., AKIN Ş., Turan H.

TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, cilt.19, sa.2, ss.99-109, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.4194/1303-2712-v19_2_02
  • Dergi Adı: TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.99-109
  • Anahtar Kelimeler: Stable isotope analysis, Gut content, Invasive fish, Habitat coupling, Cyprinids, STABLE-ISOTOPE ANALYSIS, ZOOPLANKTON CARBON, ORGANIC-MATTER, NITROGEN, TAIHU, FISH, TERRESTRIAL, RESOURCES, METHANE, SHIFT
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Stable isotope analysis was used to determine which basal sources supporting native and invasive cyprinid fishes are important in a dimictic-eutrophic lake (Lake Zinav, Turkey). We sampled potential primary producers (littoral, pelagic sources and detritus), fish and macroinvertebrates from littoral and pelagic zones of the lake during spring and summer in 2013. The relative importance of basal sources assimilated by invasive (Carassiusspp.) and native fishes (Squalius cephalus, Capoeta banarescui,Cyprinu scarpio) was estimated using SIAR mixing model. Consumers such as collector-gatherer (1) (-35.33 parts per thousand) and S. cephalus, Carassiusspp., and C. carpio had more C-13 depleted (-32.12, -31.09, -31.54 parts per thousand, respectively), while C. banarescui, collector-gatherer (2), and etc. had more C-13 enriched values (-25.03, - 26.55 parts per thousand, respectively). SIAR and gut contents indicate that main energy sources were highly variable among fishes, three main sources contributed to invasive fish, but littoral sources for C. banarescui, pelagic sources for S. cephalus, and detritus and pelagic sources for C. carpiowere important. Consumer's biomass were also partially linked to detritus. Our study suggested that all species promoted coupling of pelagic and littoral pathways, and competition for resources among invasive and native fishes was likely to cause resources sharing, and to shift to suboptimal resources.