Journal Article
The groundwater fauna of the Classical Karst: hydrogeological indicators and descriptors
Brancelj, A., Mori, N., Treu, F. and Stoch, F.
Record Number:
4504
Year:
2019
Journal:
Aquatic Ecology
Abstract:
Abstract The Classical Karst (sensu stricto) represents
a complex hydro-geomorphological unit as well
as one of the best-known karstic systems in the world.
For this reason, it was selected as a model area both for
applied research and for the conservation of its highly
diverse subterranean fauna. With this paper, we aim to
provide an overview of groundwater fauna in the
phreatic zone of the Classical Karst aquifer, based on
all published material along with new surveys, and
search for patterns of species distribution within
hydrogeological subunits, with a focus on the potential
use of species as tracers of hydrological connections
and groundwater flowpaths. The Classical Karst, with
an area of approximately 750 km2, and adjacent to
alluvial and flysch areas provides habitats for 83
stygobionts (accompanied by 16 stygophiles) and is
one of the richest hotspots for groundwater fauna
across the globe. The rate of endemism within the area
is very high (around 50%). Multivariate statistical
analyses revealed the faunal turnover between hydrogeological
subunits, as well as the effect of water flow
regime. Our approach, using species turnover and the
species indicator value, allowed us to recognise groups
of indicator species, which can be considered as
descriptors of aquifer type and habitat structure, as
well as water flow regime and groundwater flowpaths.
Times Cited:
0