FN Archimer Export Format PT J TI Stygofaunal community trends along varied rainfall conditions: Deciphering ecological niche dynamics of a shallow calcrete in Western Australia BT AF Saccò, Mattia Blyth, Alison J. Humphreys, William F. Karasiewicz, Stephane Meredith, Karina T. Laini, Alex Cooper, Steven J.B. Bateman, Philip W. Grice, Kliti AS 1:1;2:1;3:2,3;4:4;5:5;6:6;7:7,8;8:9;9:1; FF 1:;2:;3:;4:PDG-ODE-DYNECO-PELAGOS;5:;6:;7:;8:;9:; C1 WA‐Organic Isotope Geochemistry Centre, The Institute for Geoscience Research, School of Earth and Planetary SciencesCurtin University Perth Western Australia 6102 ,Australia Collections and Research Centre Western Australian Museum Welshpool Western Australia 6986 , Australia School of Biological Sciences University of Western Australia Crawley Western Australia 6009, Australia Centre de Brest, Unité Dynamiques des Écosystèmes Côtiers, Laboratoire D'écologie Pélagique, Département Océanographie et Dynamique des EcosystèmesIFREMER Plouzané F‐9280, France Australian Nuclear Science and Technology Organisation (ANSTO) Locked Bag 2001 Kirrawee DC NSW 2232 , Australia Department of Chemistry, Life Sciences and Environmental Sustainabilit University of Parma Viale G. P. Usberti 33/A Parma 43124 ,Italy Australian Centre for Evolutionary Biology and Biodiversity, School of Biological Sciences University of Adelaide Adelaide South Australia 5005 ,Australia Evolutionary Biology Unit South Australian Museum North Terrace Adelaide South Australia 5000, Australia Behavioural Ecology Lab, School of Molecular and Life Sciences Curtin University Perth Western Australia 6102, Australia C2 UNIV CURTIN, AUSTRALIA WESTERN AUSTRAL MUSEUM, AUSTRALIA UNIV WESTERN AUSTRALIA, AUSTRALIA IFREMER, FRANCE ANSTO, AUSTRALIA UNIV PARMA, ITALY UNIV ADELAIDE, AUSTRALIA S AUSTRALIAN MUSEUM, AUSTRALIA UNIV CURTIN, AUSTRALIA SI BREST SE PDG-ODE-DYNECO-PELAGOS IN WOS Ifremer UPR copubli-europe copubli-int-hors-europe IF 2.843 TC 19 UR https://archimer.ifremer.fr/doc/00599/71110/69806.pdf LA English DT Article DE ;stygofauna;ecological niche;groundwater;calcrete;rainfall;WitOMI AB Groundwaters host highly adapted fauna, known as stygofauna, which play a key role in maintaining the functional integrity of subterranean ecosystems. Stygofaunal niche studies provide insights into the ecological dynamics shaping the delicate balance between the hydrological conditions and community diversity patterns. This work aims to unravel the ecological trends of a calcrete stygofaunal community, with special focus on niche dynamics through the Outlying Mean Index analysis (OMI) and additional calculation of Within Outlying Mean Indexes (WitOMI), under three rainfall regimes. Temperature and pH changed significantly among different rainfall conditions (P < .001), and together with salinity were the most influential drivers in shaping stygofaunal assemblages. These environmental conditions, linked with nutrient fluctuations in the groundwater, constrained changes in niche occupation for water mites, two species of beetles and juvenile amphipods (OMI analysis, P < .05). The WitOMI analysis revealed differential subniche breadths linked with taxa‐specific adaptations after different rainfall conditions. Our results indicate that stygofaunal niches are closely linked to the hydrodynamic conditions influenced by different rainfall regimes. Further long‐term investigations, incorporating broader ecological perspectives, will help to understand the impacts associated with climate change and anthropogenic pressures on one of the most threatened ecosystems in the world. PY 2020 PD JAN SO Ecohydrology SN 1936-0584 PU Wiley VL 13 IS 1 UT 000502012200001 DI 10.1002/eco.2150 ID 71110 ER EF