Groundwater drift collected continuously at perennial outlets of karst aquifers has been examined for its potential in assessing the spatial distribution of the resident species. To this end, we have continuously monitored the groundwater drifted at the Mazzoccolo spring (Western Aurunci karst aquifer, Central Italy) over 2 years. Concurrently to the biological monitoring, major ion geochemistry and turbidity were investigated on the same schedule. We found that the hydrochemistry did not govern the distribution pattern of the dominant taxon (Copepoda) into the Western Aurunci aquifer. In contrast, copepod drift showed clear differences in the number of individuals between the high and low water periods because of the ‘‘piston effect,’’ which is very frequent in karst and fractured aquifers due to recharge from rainfalls. According to the results of this study, groundwater species do not inhabit all sectors of a karst aquifer. They avoid the fast-flowing conduits where groundwater rapidly flows, while colonizing the more inertial aquifer sectors, such as the slow-flowing conduits.

Groundwater drift monitoring as a tool to assess the spatial distribution of groundwater species into karst aquifers

Rusi, Sergio;
2018-01-01

Abstract

Groundwater drift collected continuously at perennial outlets of karst aquifers has been examined for its potential in assessing the spatial distribution of the resident species. To this end, we have continuously monitored the groundwater drifted at the Mazzoccolo spring (Western Aurunci karst aquifer, Central Italy) over 2 years. Concurrently to the biological monitoring, major ion geochemistry and turbidity were investigated on the same schedule. We found that the hydrochemistry did not govern the distribution pattern of the dominant taxon (Copepoda) into the Western Aurunci aquifer. In contrast, copepod drift showed clear differences in the number of individuals between the high and low water periods because of the ‘‘piston effect,’’ which is very frequent in karst and fractured aquifers due to recharge from rainfalls. According to the results of this study, groundwater species do not inhabit all sectors of a karst aquifer. They avoid the fast-flowing conduits where groundwater rapidly flows, while colonizing the more inertial aquifer sectors, such as the slow-flowing conduits.
File in questo prodotto:
File Dimensione Formato  
Di Lorenzo et al Hydrobiologia 2018 10.1007_s10750-018-3515-1 a stampa.pdf

Solo gestori archivio

Descrizione: Primary Research Paper
Tipologia: PDF editoriale
Dimensione 3.36 MB
Formato Adobe PDF
3.36 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11564/685290
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 18
social impact