Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

Pires, Daniel; Beja, Pedro; Magalhães, María Filomena

doi:10.1002/rra.2776

Cited by 26 publications

(27 citation statements)

References 52 publications

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“…Spawning migrations are common among native fishes (e.g., [52][53][54]), whereas other movements appear to be associated with adaptive behaviors to seek refugia or to colonize/re-seed habitats after severe droughts or floods (e.g., [49,55]). These latter movements may be may be especially important in Mediterranean systems with large seasonal and inter-annual variation in the magnitude, frequency, and duration of droughts and floods, which are areas where the distribution and quality of the available refuge pools can strongly influence the dynamics, persistence, and recovery of stream fishes [56,57].…”

Section: Fish Populationsmentioning

confidence: 99%

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

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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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Section: Fish Populationsmentioning

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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“…When ecological conditions change, such as reductions in food supply or adequate habitat availability, the spatial and temporal scales across which fish use a determined habitat may also change (Letourneur, 2000). Fish inhabiting this type of rivers often face a stressful summer period, to which they are perfectly adapted and respond through specialized movements in the search for refugia and/or sites of food accumulation, until regular flow and habitat conditions are replenished and fish can resume their habitual use of space (Crook, 2004;Pires et al, 2014). These modifications largely affect, at a daily or even sub-daily scale, the drifting of invertebrate preys (Céréghino and Lavandier, 1997;Cortes et al, 2002), the availability of key habitats for fish and their access to new areas (Brown and Ford, 2002;Vehanen et al, 2005), which can explain why fish subjected to these frequent food and habitat changes need to use a larger riverine area to perform important ecological processes, such as foraging, spawning or refuging (Bradford, 1997;Hanssen and Closs, 2005).…”

mentioning

confidence: 99%

Effects of flow regulation on the movement patterns and habitat use of a potamodromous cyprinid species

et al. 2015

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River regulation for hydroelectricity production results in rapid changes of flow and habitat features, but its effects in the movement patterns of freshwater fish are not well understood. Radiotelemetry was used to track Iberian barbel during a year cycle in non-regulated and regulated rivers. We applied a kernel density method to estimate and compare home range sizes of the two populations. Seasonal patterns of movement and the intra-annual variation in habitat preferences were also compared. Barbel inhabiting regulated river exhibit larger and more continuous home and core ranges, in opposition to the smaller and patchy areas used by fish inhabiting the non-regulated river. Seasonal movements of both populations were differentiated by the drought period. Barbel from the non-regulated river had to search for suitable refuges, with specific habitat characteristics, in which they remained aggregated during harsh summer conditions. Conversely, barbel from regulated river kept a continuous distribution along the river. This study contributes to the management of regulated rivers by providing insights about which flow components are more altered by hydropeaking operations and which are the most critical annual periods for fish movements. It also suggests several restoration actions, such as the protection of fish summer refuges, the restoration of large-scale temporal streamflow variability and the reduction of daily rates of discharge rise and fall, which should be continuously monitored in order to increase their efficiency and provide new knowledge.

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“…Species can also burrow into the saturated subsurface sediments of the hyporheic zone (Kawanishi, Inoue, Dohi, Fujii, & Miyake, ; Timoner, Borrego, Acuña, & Sabater, ), although the usage of the hyporheic zone as a refuge from drying has also been questioned (del Rosario & Resh, ), and the use of the hyporheic zone can depend on the characteristics of the subsurface sediments and on the taxon in question (Stubbington, ). Species can also seek refuge in nearby permanent pools or perennial upstream and downstream reaches (Bogan, Boersma, & Lytle, ; Paltridge et al., ; Pires et al., ), from which recolonists arrive after flow returns. In addition, some species spend the dry period as aerial terrestrial forms (Bogan & Boersma, ).…”

Section: Aquatic Species Have Diverse Adaptations To Freezing and Dryingmentioning

confidence: 99%

“…Drying causes fragmentation of populations and complicates fish migrations by disrupting migration pathways (Marshall et al., ; Pires et al., ). The hyporheic zone can support population maintenance of aquatic organisms in drying streams, by acting as a refuge for benthic fish and invertebrates following surface drying in IRES (Kawanishi et al., ; Vander Vorste, Corti, Sagouis, & Datry, ; Vander Vorste, Malard, & Datry, ).…”

Section: The Effects Of Freezing and Drying On Populations And Communmentioning

confidence: 99%

Parallels and contrasts between intermittently freezing and drying streams: From individual adaptations to biodiversity variation

et al. 2019

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Intermittently freezing and drying lotic systems are common in many parts of the world. These ecosystems provide dynamic habitats for biota, as both freezing and drying processes result in the loss of water flow along stream and river channels. However, research into the ecological effects of intermittent freezing on stream biota has remained relatively scarce compared to the recent increase in studies exploring the ecology of intermittent streams that dry. Climate change is predicted to alter the distribution and dynamics of intermittently freezing stream types. A better understanding of the responses of stream biota to intermittent freezing would inform predictions of the effects of ongoing climate change on these ecosystems. In this review, we compare the effects of both freezing and drying events on stream biota, ranging from individual‐level adaptations to population effects, community‐level biodiversity variation and food webs. Despite major contrasts in environmental conditions (e.g. the drying stream channels are exposed to a direct interaction with the riparian zone during the dry phases and the freezing stream channels are enclosed during the freezing phases), we show that both freezing and drying phenomena have pervasive effects on the structure and dynamics of aquatic stream biota. At the individual organism level, aquatic taxa use a range of physiological, morphological, life‐history, and behavioural responses to persist despite changing habitat conditions in both freezing and drying streams. The variety of organisms’ responses can result in both biodiversity increases and decreases, which may affect population and community dynamics in both ecosystem types. Future research should further explore the population and community‐level effects of freezing in stream ecosystems. Due to the ecological parallels between intermittently drying and freezing streams, approaches developed in research into drying streams may also be applied in freezing stream ecosystems. This could improve our understanding of climate change effects on freezing stream ecosystems.

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Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

Cited by 26 publications

References 52 publications

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

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

Effects of flow regulation on the movement patterns and habitat use of a potamodromous cyprinid species

Parallels and contrasts between intermittently freezing and drying streams: From individual adaptations to biodiversity variation

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