“…However, in karstic regions, which frequently exhibit high permeability and reduced surface drainage capabilities, SGD is primarily composed of terrestrial freshwater (Garcia-Solsona et al, 2010b;Weinstein et al, 2011). SGD has been acknowledged as a significant source of nutrients to coastal waters (Slomp and Van Cappellen, 2004;Paytan et al, 2006;Garcia-Solsona et al, 2010a;Einsiedl, 2012;Rodellas et al, 2014) as well as being a source of trace metals and contaminants (Boehm et al, 2004;Windom et al, 2006;Beck et al, 2007); as such, SGD has become a topic of substantial research interest (Moore, 2010). SGD research has traditionally been focussed on coastal areas of North America, Australia, Japan and the Mediterranean Sea (Taniguchi et al, 2002).…”