Integrating intermittent streams into watershed assessments: applicability of an index of biotic integrity

Mazor, Raphael D.; Stein, Eric D.; Ode, Peter R.; Schiff, Ken

doi:10.1086/675683

Cited by 54 publications

(36 citation statements)

References 37 publications

(28 reference statements)

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“…Therefore, we have scant information about their spatial extent (Meyer and Wallace, 2001;Benstead and Leigh, 2012;Datry et al, 2014a), hydrological regime Datry et al, 2014a) and, as they have been excluded from bioassessment programs (e.g., Hall et al, 1998;Peck et al, 2006;, and about their ecology (Williams, 2008;Larned et al, 2010;Datry et al, 2014a). Thus, as stated in Mazor et al (2014), "many surveys of ambient stream conditions are incomplete, biomonitoring programs do not provide comprehensive evaluations of stream health or complete assessments of watershed or regional conditions, and watershed-management and resource-protection programs based on these assessments might be compromised".…”

Section: An Update Of Research On Eu-med Nprsmentioning

confidence: 99%

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

Skoulikidis

Sabater

Datry

et al. 2017

Science of The Total Environment

215

134

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Non-perennial rivers and streams (NPRS) cover N 50% of the global river network. They are particularly predominant in Mediterranean Europe as a result of dry climate conditions, climate change and land use development. Historically, both scientists and policy makers underestimated the importance of NRPS for nature and humans alike, mainly because they have been considered as systems of low ecological and economic value. During the past decades, diminishing water resources have increased the spatial and temporal extent of artificial NPRS as well as their exposure to multiple stressors, which threatening their ecological integrity, biodiversity and ecosystem services. In this paper, we provide a comprehensive overview of the structural and functional characteristics of NPRS in the European Mediterranean, and discuss gaps and problems in their management, concerning their typology, ecological assessment, legislative and policy protection, and incorporation in River Basin Management Contents lists available at ScienceDirect Science of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n vPlans. Because NPRS comprise highly unstable ecosystems, with strong and often unpredictable temporal and spatial variability -at least as far as it is possible to assess -we outline the future research needs required to better understand, manage and conserve them as highly valuable and sensitive ecosystems. Efficient collaborative activities among multidisciplinary research groups aiming to create innovative knowledge, water managers and policy makers are urgently needed in order to establish an appropriate methodological and legislative background. The incorporation of NPRS in EU-Med River Basin Management Plans in combination with the application of ecological flows is a first step towards enhancing NPRS management and conservation in order to effectively safeguard these highly valuable albeit threatened ecosystems.

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Section: An Update Of Research On Eu-med Nprsmentioning

confidence: 99%

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

Skoulikidis

Sabater

Datry

et al. 2017

Science of The Total Environment

215

134

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“…Nevertheless, variability was the highest for non-perennial streams examined, similar to results from California. Even with the above-described limitations and deficiencies, the development of methods for adapting traditional biomonitoring tools to Mediterranean streams and rivers is underway [117,118]. For example, in California, Mazor et al [118] demonstrated acceptable performance of current biomonitoring indices such as the Southern California Index of Biotic Integrity (IBI) for many intermittent streams.…”

Section: Biomonitoring In Highly Variable Systemsmentioning

confidence: 99%

“…Even with the above-described limitations and deficiencies, the development of methods for adapting traditional biomonitoring tools to Mediterranean streams and rivers is underway [117,118]. For example, in California, Mazor et al [118] demonstrated acceptable performance of current biomonitoring indices such as the Southern California Index of Biotic Integrity (IBI) for many intermittent streams. Moreover, innovative approaches, such as one based on terrestrial fauna [119,120] are being developed.…”

Section: Biomonitoring In Highly Variable Systemsmentioning

confidence: 99%

High Variability Is a Defining Component of Mediterranean-Climate Rivers and Their Biota

Cid

Bonada

Carlson

et al. 2017

Water

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Abstract:Variability in flow as a result of seasonal precipitation patterns is a defining element of streams and rivers in Mediterranean-climate regions of the world and strongly influences the biota of these unique systems. Mediterranean-climate areas include the Mediterranean Basin and parts of Australia, California, Chile, and South Africa. Mediterranean streams and rivers can experience wet winters and consequent floods to severe droughts, when intermittency in otherwise perennial systems can occur. Inter-annual variation in precipitation can include multi-year droughts or consecutive wet years. Spatial variation in patterns of precipitation (rain vs. snow) combined with topographic variability lead to spatial variability in hydrologic patterns that influence populations and communities. Mediterranean streams and rivers are global biodiversity hotspots and are particularly vulnerable to human impacts. Biomonitoring, conservation efforts, and management responses to climate change require approaches that account for spatial and temporal variability (including both intra-and inter-annual). The importance of long-term data sets for understanding and managing these systems highlights the need for sustained and coordinated research efforts in Mediterranean-climate streams and rivers.

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“…In addition, this work could be relevant for watershed management. The knowledge of the duration and the variability of the drying phase is very important for assessing the ecological status of IRES (Mazor, Stein, Ode, & Schiff, ; Prat et al, ). It could also help to identify which metrics are the most relevant for detecting human impacts (Datry, Bonada, & Boulton, ).…”

Section: Resultsmentioning

confidence: 99%

A classification approach to reconstruct local daily drying dynamics at headwater streams

Beaufort

Carreau

Sauquet

2019

Hydrological Processes

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Headwater streams (HSs) are generally naturally prone to flow intermittence. These intermittent rivers and ephemeral streams have recently seen a marked increase in interest, especially to assess the impact of drying on aquatic ecosystems. The two objectives of this work are (a) to identify the main drivers of flow intermittence dynamics in HS and (b) to reconstruct local daily drying dynamics. Discrete flow states—“flowing” versus “drying”—are modelled as functions of covariates that include information on climate, hydrology, groundwater, and basin descriptors. Three classifiers to estimate flow states using covariates are tested on four contrasted regions in France: (a) a linear classifier with regularization (LASSO for least absolute shrinkage and selection operator) and two non‐linear non‐parametric classifiers, (b) a one‐hidden‐layer feedforward artificial neural network (ANN) classifier, and (c) a random forest (RF) classifier. The three classifiers are compared with a benchmark classifier (BC) that simply estimates dominant flow state for each month based on observations (without using covariates). The performance assessment over the period 2012–2016 carried out by cross‐validation shows that the three classifiers for flow state based on covariates outperformed the BC. This demonstrates the predictive power of the covariates. ANN is the classifier that globally achieves the best performance to predict the daily drying dynamics whereas both RF and LASSO tend to underestimate the proportion of drying states. The covariates are ranked in terms of relevance for each classifier. The monthly proportion of drying states provided by the discrete observation network has a major importance for the three classifiers ANN, LASSO, and RF. This may reflect the proclivity of a site to flow intermittence. ANN gives higher importance to climatic and hydrological covariates and its non‐linearity allows a greater degree of freedom.

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Integrating intermittent streams into watershed assessments: applicability of an index of biotic integrity

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 54 publications

References 37 publications

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

Non-perennial Mediterranean rivers in Europe: Status, pressures, and challenges for research and management

High Variability Is a Defining Component of Mediterranean-Climate Rivers and Their Biota

A classification approach to reconstruct local daily drying dynamics at headwater streams

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