Screening of NaCl salinity sensitivity across eight species of subterranean amphipod genus Niphargus

Jemec Kokalj, Anita (avtor), Fišer, Žiga (avtor), Dolar, Andraž (avtor), Novak, Sara (avtor), Drobne, Damjana (avtor), Bračko, Gregor (avtor), Fišer, Cene (avtor)

Secondary salinization of freshwater is becoming a growing environmental problem. Currently, there is few data available on the effects of salinisation on subterranean crustaceans that are vital for the maintenance of groundwater ecosystem functioning. In this study, the sensitivity of subterranean Niphargus amphipods to NaCl was investigated. We expected that cave-dwelling species would be more sensitive as surface-subterranean boundary species. Eight ecologically different Niphargus species were tested: four live at the boundary between the surface and subterranean ecosystems (N. timavi, N. krameri, N. sphagnicolus, N. spinulifemur), three live in cave streams (N. stygius, N. scopicauda, N. podpecanus), and one species (N. hebereri) lives in anchialine caves and wells. The organisms were exposed to five concentrations of NaCl for 96 h and afterwards the immobility, mortality, and electron transfer system (ETS) activity (a measure for metabolic rate of animals) were evaluated. As expected, the most tolerant species was N. hebereri dwelling in naturally high-salinity habitat. However, contrary to our expectations, the species collected at the surface-subterranean boundary were more sensitive as cave stream species when their immobility and mortality were assessed. Interestingly, the majority of Niphargus tested were more NaCl tolerant as can be deduced from currently available data for subterranean and surface crustaceans. We could not observe a clear trend in ETS activity changes between groups of surface-subterranean boundary and cave streams species after exposure to NaCl stress, but it appears that osmotic stress-induced metabolic rate changes are species-specific. This study shows that amphipods Niphargus can be a valuable subterranean environmental research model and further ecotoxicity research is of interest.

• Jezik: Angleški jezik
• Ključne besede: amphipods, cave crustaceans, ecotoxicity, groundwater, salinisation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 9 str.
• Številčenje: Vol. 236, art. 113456
• PID: 20.500.12556/RUL-139061
• UDK: 574
• ISSN pri članku: 1090-2414
• DOI: 10.1016/j.ecoenv.2022.113456
• COBISS.SI-ID: 104434691
• Datum objave v RUL: 29.08.2022

Gradivo je del revije

• Naslov: Ecotoxicology and environmental safety
• Skrajšan naslov: Ecotoxicol. environ. saf.
• Založnik: Elsevier
• ISSN: 1090-2414
• COBISS.SI-ID: 68356099

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: postranice, jamski raki, ekotoksikologija, podzemne vode, zasoljevanje

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0184
• Naslov: Integrativna zoologija in speleobiologija

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: N1-0069
• Naslov: Spremenljiva selekcija vzdržuje fenotipski polimorfizem: empirična študija na površinskih in podzemeljskih rakih