A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota

Gallart, Francesc; Fornells, Narcís Prat; García‐Roger, Eduardo M.; Latron, Jérôme; Rieradevall, María; Llorens, Pilar; Barberá, Gonzalo G.; Brito, David; Girolamo, Anna Maria De; Porto, A. Lo; Buffagni, Andrea; Erba, Stefania; Neves, Ramiro; Nikolaidis, Nikolaos P.; Perrin, Jean-Louis; Querner, E.P.; Quiñonero, J. M.; Tournoud, Marie-George; Tzoraki, Ourania; Skoulikidis, Nikolaos Th.; Gómez, Rosa; Sánchez-Montoya, M. M.; Froebrich, J.

doi:10.5194/hess-16-3165-2012

Cited by 107 publications

(134 citation statements)

References 57 publications

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“…In this classification, streams are classified as temporary or permanent river, and temporary rivers are differentiated in their turn in three types on the basis of the control imposed on the biological communities by the absence of flow (Gallart et al, 2012):…”

Section: Classifying River Typesmentioning

confidence: 99%

“…8) where the metric values are incompatible (i.e., if M f takes the value 0.4, as a result of equation (1), Sd 6 cannot assume values higher than 0.8). The red lines used in the plot to differentiate the river types are fixed after analyzing data recorded in several streams in Mediterranean area (Gallart et al, 2012).…”

Section: Hydrological Statusmentioning

confidence: 99%

“…Gallart et al (2012) defined the sets of ecological relevant mesohabitats that can occur in a reach in a certain period depending on the hydrological conditions "Aquatic States" (ASs). They identified six classes of flow (ASs): Hyperrheic (flood), Eurheic (high flow), Oligorheic (continuous low flow or connected pools), Arheic (flow close to zero or disconnected pools), Hyporheic (surface water is absent, there is only hyporheic flow) and Edaphic (surface and hyporheic flow are zero).…”

Section: Characterizing Streamflow Regimementioning

confidence: 99%

“…A large number of indices were developed in attempts to characterize different components of hydrological regime for ecological or management purpose (Richter et al, 1996). Gallart et al (2012) identified two metrics as relevant for the qualitative status of a temporary river: the relative annual number of months with flow (M f ) and the 6 months dry season predictability (Sd 6 ) defined by the following equation (1):…”

Section: Hydrological Status Assessmentmentioning

confidence: 99%

“…In this paper, we present the hydrological tool aimed at: (1) classifying rivers, (2) characterizing the hydrological regime at reach scale as described by Gallart et al (2012) and (3) evaluating the hydrological alterations due to anthropogenic pressures in a temporary river. Our purpose is to give biologists an overall assessment of regime that can contribute in planning the biological samplings and provide water resource managers an easy tool which could facilitate any investigation into the effects of hydrological modifications within the biotic composition in temporary rivers.…”

Section: Introductionmentioning

confidence: 99%

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An eco-hydrological assessment method for temporary rivers. The Celone and Salsola rivers case study (SE, Italy)

Girolamo

Gallart

Pappagallo

et al. 2015

Ann. Limnol. - Int. J. Lim.

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-This paper presents the results of a study which characterizes the hydrological regime of a temporary river at reach scale and analyzes the hydrological alterations due to anthropogenic pressures using the SWAT model to estimate the daily streamflows and the periods without flow which would occur in natural conditions. The study area is the Salsola and Celone river basins, located in SE Italy. In a first part, we identified six classes of flow, the so-called Aquatic States (ASs), which play a major role in determining the available mesohabitats and subsequently the characteristics of the aquatic life. The monthly occurrence of the different ASs over a long period has been evaluated in order to provide useful information to design biological samplings. The results show that dry bed conditions can occur from May to January and arheic state from April to January in the reaches located in the upper part of the basin. The impacted river reaches showed a different behavior depending on the anthropogenic impacts. In a second part, two indicators based on the statistics of the periods without flows were used, monthly flow permanence and dry season predictability, for describing the flow regime components which may have been altered by anthropogenic pressures. The indexes, which were computed in impacted and natural conditions, were used as coordinates in a plot to obtain a graphical vision of the regimes. The distance between the points representing the actual (impacted) and natural states in the plot were used to classify the hydrological alterations.

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Section: Classifying River Typesmentioning

confidence: 99%

Section: Hydrological Statusmentioning

confidence: 99%

Section: Characterizing Streamflow Regimementioning

confidence: 99%

Section: Hydrological Status Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An eco-hydrological assessment method for temporary rivers. The Celone and Salsola rivers case study (SE, Italy)

Girolamo

Gallart

Pappagallo

et al. 2015

Ann. Limnol. - Int. J. Lim.

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Identifying priority aquatic refuges to sustain freshwater biodiversity in intermittent streams in eastern Australia

Rose

Bond

et al. 2022

Aquatic Conservation

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1. The hydrological variability of intermittent streams means that the spatial distribution of dry-season aquatic refuges within river networks and the temporal dynamics of hydrological connectivity between them are critical for the persistence of aquatic biodiversity. Here, a new approach is demonstrated to identify surface water bodies as priority refuges for efficient conservation management of freshwater biodiversity in intermittent stream networks.2. Recently developed models of surface water extent and daily streamflow were used to represent spatio-temporal variations in hydrological connectivity and surface water persistence within river networks of eastern Australia over a 107-yr period. Using this information, systematic conservation planning was applied to prioritize aquatic areas for conservation of 25 fish species under two scenarios.One scenario identified priority refuges to complement those already occurring in protected areas, whereas the other did not consider protected area status.3. The priority networks identified concentrated on the main stems of river catchments where surface water was more likely to be persistent and aquatic refuges were more likely to be connected, but also included headwaters for rare fish species. All three set conservation targets for the 25 fish species can be met in the best solution of priority networks. Although the second scenario achieved the targets with a smaller size of priority network overall, it required more new aquatic refuges and was thus less efficient than the first scenario.4. The newly developed datasets are useful for freshwater conservation prioritization because they account for hydrological variability of intermittent streams. The systematic prioritization approach applied is transferable to other regions and freshwater taxa to identify aquatic refuges for biodiversity conservation within intermittent stream systems.

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Integrating spatiotemporal hydrological connectivity into conservation planning to protect temporary rivers

Fernández‐Calero,

Cunillera‐Montcusí,

Hermoso

et al. 2024

Aquatic Conservation

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Temporary rivers (TRs) have been largely overlooked in conservation assessments. Because TRs are such dynamic ecosystems, spatial and temporal aspects of their hydrology and ecology need to be taken into account when designing conservation plans. The aim of this paper is to propose a set of recommendations that could be useful for managers to do this, using seasonal diatom and macroinvertebrate data from north‐eastern Spain as a case study. Beta diversity was partitioned into local and species contributions to beta diversity (LCBD and SCBD). Additionally, priority conservation sites covering the spatial distribution of all species were identified using Marxan and the selection frequency (MSF) of the sites served as a measure of the relative irreplaceability of each site. Using both approaches (beta diversity and Marxan), the effects of changing spatiotemporal connectivity and habitat heterogeneity on the selection and prioritization of sites to be conserved were assessed. It was found that LCBD and MSF ranged widely both in space and time. However, LCBD and MSF were weakly related. Marxan adequately represented all taxa by selecting a few sites, while LCBD selected communities with higher differentiation but not necessarily those with rare species. In addition, SCBDs assigned low values to rare taxa, thus care must be taken when using this index for conservation planning. Spatiotemporal connectivity and local habitat heterogeneity played a critical role at the regional and local scales, driving site prioritization. Overall, we recommend: 1) monitoring multiple hydrological phases to encompass the different community types and capturing total diversity; 2) using Marxan and LCBD in combination, to benefit from their complementary insights; and 3) integrating spatiotemporal isolation and habitat heterogeneity into conservation plans, since they are the main drivers of community variation over space and time in TRs.

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A novel approach to analysing the regimes of temporary streams in relation to their controls on the composition and structure of aquatic biota

Cited by 107 publications

References 57 publications

An eco-hydrological assessment method for temporary rivers. The Celone and Salsola rivers case study (SE, Italy)

An eco-hydrological assessment method for temporary rivers. The Celone and Salsola rivers case study (SE, Italy)

Identifying priority aquatic refuges to sustain freshwater biodiversity in intermittent streams in eastern Australia

Integrating spatiotemporal hydrological connectivity into conservation planning to protect temporary rivers

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