Spatial distribution of exotic fish species in the Guadiana river basin, with two new records

López, Virgilio; Garrido, Francisco Blanco; Marín, José Prenda

doi:10.23818/limn.27.15

Cited by 23 publications

(6 citation statements)

References 10 publications

(9 reference statements)

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“…Correspondingly, a recent study investigating global fish distributions revealed that the historical connection among river basins during Quaternary low sea‐level periods constitutes a good predictor explaining range sizes in freshwater fishes (Carvajal‐Quintero et al, 2019). Although its effect is not as remarkable as for primary native species, ‘basin ID’ was also the most important variable for several alien species such as Australoheros facetus , mostly present in the Guadiana basin (Hermoso et al, 2008); and Scardinius erythrophthalmus , whose distribution is mainly restricted to the basins of the Ebro and Eastern Pyrenees (Doadrio, 2001). By contrast, ‘basin ID’ was much less important for peripheral fish, as their geographical ranges are not necessarily restricted by the sea given their ability to migrate, or disperse through seawater (McDowall, 2010) and thereby enter and colonize other river catchments.…”

Section: Discussionmentioning

confidence: 99%

The importance of seawater tolerance and native status in mediating the distribution of inland fishes

Cano-Barbacil

Radinger

García‐Berthou

2022

Journal of Biogeography

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Aim: Unravelling the ecological and historical factors that underlie species distributions has challenged ecologists for a long time. Thus, our objective is to understand the role of environmental variables explaining the distribution of three major ecoevolutionary groups of inland fishes (Darlington's divisions: primary, i.e. strict freshwater; secondary, i.e. salt-tolerant; and peripheral, i.e. diadromous and marine origin), and how these variables are related to fish traits.Location: Iberian Peninsula.Taxon: 51 native and 17 alien inland fish species from the Iberian Peninsula. Methods:We modelled distributions of the most common inland fish species across the Iberian Peninsula to compare the importance of different predictors among the three Darlington's divisions and between native and alien species. To explore the importance of specific environmental variables in determining the distribution of different traits of inland fish, variable importances obtained from species distribution models were subjected to a redundancy analysis.Results: Darlington's divisions differ significantly in salinity tolerance, in distribution overlap, in the importance of distribution predictors and associated life-history traits. Topographic and climatic variables were generally more important than land use and anthropogenic factors in explaining fish distributions. We found significant differences in the importance of variables explaining the distribution of native vs. alien species and especially among Darlington's divisions. River basin was most important for primary native and many alien species. Increasing mean temperature and damming were positively associated with the presence of tolerant, large-bodied and warm-water alien species from more hydrologically stable habitats.Main conclusions: Despite marked differences in the distribution patterns of native and alien species, evolutionary and introduction histories as well as seawater tolerance are central factors explaining the current distribution of inland fishes. Darlington's divisions proved useful for addressing ecological and biogeographical questions at broader spatial scales.

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Section: Discussionmentioning

confidence: 99%

The importance of seawater tolerance and native status in mediating the distribution of inland fishes

Cano-Barbacil

Radinger

García‐Berthou

2022

Journal of Biogeography

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“…The summation of all the metrics scores obtained guided to materializing the outcome as the final IBI score that later represented the biological integrity classes. The biotic integrity classes and their ranges based on IBI scores are: excellent (36)(37)(38)(39)(40), good (28)(29)(30)(31)(32)(33)(34), fair (20)(21)(22)(23)(24)(25)(26), poor (14)(15)(16)(17)(18) and very poor (8-13).…”

Section: Ecological Health Assessmentmentioning

confidence: 99%

“…The anthropogenic disturbances reportedly facilitate successful fish invasions in the disturbed ecosystems [56]. It appears that IAFS prefer the lentic habitats with hydrological disturbances such as dam construction [17,57] and weir impacts [21] for their rapid spread and concomitant establishment. The construction of the weir on streams and rivers regularly hinders the water currents, leading to unexpected micro-habitat structure changes [58].…”

Section: Water Chemistry and Physical Habitat Qualitymentioning

confidence: 99%

“…Largemouth bass (Micropterus salmoides) is one of the worst and globally acknowledged IAFS originating from North America [16] and is listed by IUCN as one of the 100 worst IAS worldwide. Reports show their presence either as introduced or established all over the world, including Europe [17], Asia [18,19], and Africa [20]. It is causing severe damage to the native fish fauna, habitat, community composition, and the ecosystem at large since it was introduced [2,21].…”

Section: Introductionmentioning

confidence: 99%

“…Largemouth bass prefers lentic ecosystems, such as reservoirs and lakes [17,34], but it has also been reported in streams, which has led to adverse effects on native fish assemblages [19,20,24]. However, it has also been reported from the connected tributaries of the main river channel introduced [24].…”

Section: Introductionmentioning

confidence: 99%

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Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Kim

Atique

2021

Water

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Invasive alien fish species (IAFS) influence recipient ecosystems in multiple ways, from altered native fish communities to poor ecological health and higher economic losses to control and eradication. We tested key drivers and connections between an IAFS (Micropterus salmoides) presence, absence, geomorphological, hydro-chemical, physical habitat, native fish assemblages, and large river basins biotic integrity during 2016–2019. A total number of 62,121 individuals (TNI) representing 74 fish species were observed, out of which 68 species (45,677 TNI) belonged to the Geum River (GR) basin, while 63 species (16,444 TNI) were from the Mankyong/Dongjin River (MDR) basin. The results illustrated a significant contrast based on stream order, catchment area, altitude, stream gradient, and width among the sites with and without largemouth bass. However, fluctuations in nutrients (nitrogen and phosphorus) were not affected by variations in pH, dissolved oxygen, conductivity, suspended solids, and river flow. The largemouth bass has emerged as the 8th largest fish population in the GR and swiftly occupies the MDR basin with a constancy value of 45.5. Native sensitive (r = −0.38), insectivore (r = −0.252), carnivores (r = −0.085), and TNI (r = −0.512) displayed a negative correlation with increasing largemouth bass abundance. Largemouth bass induced significant regime transformation in the carnivore species. A significant difference (p < 0.01) of biotic integrity was illustrated among the largemouth bass population sites. A conspicuous interplay between ‘poor’ ecological health (r = 0.33, p = 0.038, n = 41) sites and ‘fair–excellent’ (r = −0.38, p < 0.001, n = 622) sites as compared to the overall ecological health linked with largemouth bass abundance (r = −0.397, p < 0.001, n = 663) alluded to stronger impact of the IAFS. In conclusion, the largemouth bass has potentially altered the native fish assemblage and ecological health. Further, we conclude that rapidly shifting flow patterns supported by the expanding anthropogenic interventions (weirs and dam) are the most approving factors of impending fish invasions.

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Reference vs. present-day condition: early planning decisions influence the achievement of conservation objectives

Hermoso

Januchowski‐Hartley

Linke

et al. 2011

Aquatic Conserv: Mar. Freshw. Ecosyst.

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ABSTRACT1. A vast scientific literature has been devoted to identifying the best way to represent biodiversity for conservation in the last decade. Methods exist for deciding how to use scarce information and avoid omission and commission errors. The effect of these errors on reserve efficiency does not arise only from the accuracy of data representing conservation features, as usually considered. There are also several underlying assumptions associated with the type of data used that might affect accuracy of conservation decision-making and compromise achievement of conservation objectives.2. Here the effects of two management scenarios on selection of priority areas for conservation are explored. The spatial distribution of 10 native freshwater fish species in an Iberian basin under present-day and reference conditions were modelled and priority areas for both scenarios using the same spatial and cost constraints were identified.3. Priority areas identified under the present-day scenario reflected the up-to-date spatial distribution of species and avoided the selection of highly perturbed and costly areas. The isolated spatial distribution of native populations imposed by the current perturbation status limited the spatial connectivity between priority areas under the present-day scenario. Most importantly for the achievement of conservation objectives, priority areas selected under both scenarios did not overlap.4. Given that the reference scenario was based on potential presence of native species the actual representation of species would be overestimated if consideration were not given to restoring reference conditions (high commission errors). Based on results obtained it is recommended that planners give more consideration to the current perturbation status when identifying priority areas for conservation.

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Spatial distribution of exotic fish species in the Guadiana river basin, with two new records

Cited by 23 publications

References 10 publications

The importance of seawater tolerance and native status in mediating the distribution of inland fishes

The importance of seawater tolerance and native status in mediating the distribution of inland fishes

Key Drivers Influencing the Presence and Absence of Micropterus salmoides and Their Effect on Native Fish Communities and Biotic Integrity

Reference vs. present-day condition: early planning decisions influence the achievement of conservation objectives

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