Acta Biologica

Previously: Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica


ISSN: 2450-8330     eISSN: 2353-3013    OAI    DOI: 10.18276/ab.2018.25-06
CC BY-SA   Open Access   DOAJ

Issue archive / No. 25
Prey abundance supporting unusual water mite (Acari: Hydrachnidia) community in a sublacustrine spring and tributary river

Authors: Ivana Pozojević
Division of Zoology, Faculty of Science, University of Zagreb

Ivančica Ternjej
Division of Zoology, Faculty of Science, University of Zagreb

Zlatko Mihaljević
Division of Zoology, Faculty of Science, University of Zagreb

Sanja Gottstein
Division of Zoology, Faculty of Science, University of Zagreb

Natalija Vučković
Division of Zoology, Faculty of Science, University of Zagreb

Valentina Dorić
Eko-monitoring d.o.o

Mario Rumišek
Independant researcher
Keywords: meiofaunal food web predator-prey interactions karst water community sublacustrine spring karst river
Whole issue publication date:2018
Page range:7 (69-75)
Cited-by (Crossref) ?:

Abstract

Water mites are predators on microcrustations (Copepoda, Cladocera, Ostracoda) and insect larvae (mostly Diptera). Their communities usually have great diversity with high species richness but relatively low abundance. This may have important implications for poorly investigated predator-prey interactions of water mites in natural habitats. A sublacustrine karst spring Torak and the mouth of its tributary river Čikola were examined seasonally from August 2016 to June 2017, with the aim of determining water mite distribution connected to prey availability. Triplicate samples were taken with an Ekman dredge on three distinct depth zones (littoral, sublittoral and profundal zone) at both study sites. Both, the karst spring and the tributary river, had typical lentic water mite communities with no rhithrobiont or crenobiont taxa present. Water mite species richness, abundance and alpha diversity were not governed by depth, but rather by prey availability. Greater copepod, ceratopogonid and chironomid abundances were found to positively correlate with higher abundances of water mites. The population of Limnesia connata, previously reported from lime-poor waters exclusively, was most probably supported by vast prey availability, thus unexpectedly surviving in this karst environment. L. connata, Neumania vernalis and Piona longipalpis were recorded for the first time in Croatia, while L. connata was recorded for the first time in the Dinaric karst.
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