A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota
Gallart Gallego, Francesc et al.
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European Geosciences Union
2012
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| Online Access: | http://hdl.handle.net/10261/74195 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
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dig-idaea-es-10261-741952020-07-09T09:39:44Z A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota Gallart Gallego, Francesc Latron, Jérôme Llorens, Pilar González Barberá, Gonzalo Froebrich, J. European Commission Ministerio de Economía y Competitividad (España) Gallart Gallego, Francesc et al. Temporary streams are those water courses that undergo the recurrent cessation of flow or the complete drying of their channel. The structure and composition of biological communities in temporary stream reaches are strongly dependent on the temporal changes of the aquatic habitats determined by the hydrological conditions. Therefore, the structural and functional characteristics of aquatic fauna to assess the ecological quality of a temporary stream reach cannot be used without taking into account the controls imposed by the hydrological regime. This paper develops methods for analysing temporary streams' aquatic regimes, based on the definition of six aquatic states that summarize the transient sets of mesohabitats occurring on a given reach at a particular moment, depending on the hydrological conditions: Hyperrheic, Eurheic, Oligorheic, Arheic, Hyporheic and Edaphic. When the hydrological conditions lead to a change in the aquatic state, the structure and composition of the aquatic community changes according to the new set of available habitats. We used the water discharge records from gauging stations or simulations with rainfall-runoff models to infer the temporal patterns of occurrence of these states in the Aquatic States Frequency Graph we developed. The visual analysis of this graph is complemented by the development of two metrics which describe the permanence of flow and the seasonal predictability of zero flow periods. Finally, a classification of temporary streams in four aquatic regimes in terms of their influence over the development of aquatic life is updated from the existing classifications, with stream aquatic regimes defined as Permanent, Temporary-pools, Temporary-dry and Episodic. While aquatic regimes describe the long-term overall variability of the hydrological conditions of the river section and have been used for many years by hydrologists and ecologists, aquatic states describe the availability of mesohabitats in given periods that determine the presence of different biotic assemblages. This novel concept links hydrological and ecological conditions in a unique way. All these methods were implemented with data from eight temporary streams around the Mediterranean within the MIRAGE project. Their application was a precondition to assessing the ecological quality of these streams. The research leading to these results received funding from the European Community’s Seventh Framework Programme (FP7/2007-2011) under grant agreement 211732 (MIRAGE project), as well from the Spanish Government under the RespHimed project (CGL2010-18374) and a research contract (Ram´on y Cajal programme) granted to J. Latron. Peer Reviewed 2013-04-12T07:59:29Z 2013-04-12T07:59:29Z 2012 2013-04-12T07:59:29Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.5194/hess-16-3165-2012 issn: 1027-5606 e-issn: 1607-7938 Hydrology and Earth System Sciences 16(9): 3165-3182 (2012) http://hdl.handle.net/10261/74195 10.5194/hess-16-3165-2012 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# 211732 info:eu-repo/grantAgreement/EC/FP7/211732 Publisher’s version http://dx.doi.org/10.5194/hess-16-3165-2012 open European Geosciences Union Copernicus Publications |
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| language |
English |
| description |
Gallart Gallego, Francesc et al. |
| author2 |
European Commission |
| author_facet |
European Commission Gallart Gallego, Francesc Latron, Jérôme Llorens, Pilar González Barberá, Gonzalo Froebrich, J. |
| format |
artículo |
| author |
Gallart Gallego, Francesc Latron, Jérôme Llorens, Pilar González Barberá, Gonzalo Froebrich, J. |
| spellingShingle |
Gallart Gallego, Francesc Latron, Jérôme Llorens, Pilar González Barberá, Gonzalo Froebrich, J. A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| author_sort |
Gallart Gallego, Francesc |
| title |
A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| title_short |
A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| title_full |
A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| title_fullStr |
A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| title_full_unstemmed |
A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| title_sort |
novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota |
| publisher |
European Geosciences Union |
| publishDate |
2012 |
| url |
http://hdl.handle.net/10261/74195 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
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