Biogeographical regions of the Iberian peninsula based on freshwater fish and amphibian distributions

Ecography ◽  
1998 ◽  
Vol 21 (4) ◽  
pp. 371-382 ◽  
Author(s):  
J. Mario Vargas ◽  
Raimundo Real ◽  
Jose C. Guerrero
Keyword(s):  
Iberian Peninsula ◽  
Freshwater Fish ◽  
Biogeographical Regions

scholarly journals Ecological Niche Models Reveal Climate Change Effect on Biogeographical Regions: The Iberian Peninsula as a Case Study

Climate ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 42 ◽  
Author(s):  
Diana Sousa-Guedes ◽  
Salvador Arenas-Castro ◽  
Neftalí Sillero
Keyword(s):  
Iberian Peninsula ◽  
Environmental Conditions ◽  
Atlantic Coast ◽  
Group Method ◽  
Ecological Niche Models ◽  
North West ◽  
Pair Group ◽  
Climate Change Effect ◽  
Biogeographical Regions ◽  
Over Time

How species are distributed on Earth depends largely on climate factors. Whenever these environmental conditions change, species tend to shift their distributions to reach more favourable conditions. Distinct sets of species similarly distributed (i.e., chorotypes) occur in biogeographical regions with homogeneous environmental conditions. Here, we analysed whether biogeographical regions are unstable over time (from the past to the future). We modelled the realised niche of amphibians and reptiles in the Iberian Peninsula in the present, and several past and future climate scenarios. Then, we used Jaccard’s index and the unweighted pair group method (UPGMA) to define the biogeographical regions. Our results suggest that the biogeographical regions of Iberian amphibians and reptiles changed greatly over time, due to the climatic changes between periods. Biogeographical regions composed of species with Atlantic affinities changed particularly, overall gaining suitable areas in past colder periods and losing suitable areas in warmer periods. The areas of refugia for amphibians over time corresponded to the most humid regions (north-west of the peninsula), while the most important areas for reptiles occur in the south and on the Atlantic coast. The identification of biogeographical patterns considering past climate changes is essential to better apply conservation measures.

scholarly journals Global biogeographical regions of freshwater fish species

2019 ◽  
Vol 46 (11) ◽  
pp. 2407-2419 ◽  
Author(s):  
Boris Leroy ◽  
Murilo S. Dias ◽  
Emilien Giraud ◽  
Bernard Hugueny ◽  
Céline Jézéquel ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Freshwater Fish Species ◽  
Biogeographical Regions

scholarly journals Effective reassessments of freshwater fish species: a case study in a Mediterranean peninsula

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Imanol Miqueleiz ◽  
Rafael Miranda ◽  
Arturo H. Ariño ◽  
Tommaso Cancellario
Keyword(s):  
Iberian Peninsula ◽  
Freshwater Fish ◽  
Fish Species ◽  
Conservation Status ◽  
Fish Fauna ◽  
Iucn Red List ◽  
Molecular Techniques ◽  
Red Lists ◽  
Freshwater Fish Species ◽  
Freshwater Fish Fauna

AbstractIUCN Red List assessments for fish species can quickly become out of date. In recent years molecular techniques have added new ways of obtaining information about species distribution or populations. In this work, we propose the Iberian Peninsula as an example of reassessment needs in its endangered freshwater fish fauna. We compiled the list of freshwater fish species occurring in continental Spain and Portugal and examined their conservation status in global and national Red Lists. We retrieved records for these species in the Iberian Peninsula and calculated several biological indexes (richness and vulnerability indexes). Our results showed a patchy data coverage of fish records in the Iberian Peninsula. Threat levels reported within national Red Lists are higher than their global counterparts, reinforcing the necessity of improving and maintaining up to date national Red Lists. Iberian watersheds have moderate levels of threat and high levels of out of date assessments. The nearly fully completed genetic databases for Iberian fish species, along with the limited distribution of many endangered species and the necessity of update their assessments constitute an excellent opportunity to use data obtained from eDNA to improve species monitoring practices and their conservation status.

Modelling suitable areas for Hyla meridionalis under current and future hypothetical expansion scenarios

2010 ◽  
Vol 31 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Neftalí Sillero
Keyword(s):  
Iberian Peninsula ◽  
North Africa ◽  
Temporal Trends ◽  
Mountain Range ◽  
Expansion Process ◽  
Global Environmental ◽  
Complete Dataset ◽  
Current Scenario ◽  
Biogeographical Regions ◽  
Spatio Temporal

AbstractNew records of the frog Hyla meridionalis have been reported on the Iberian Central mountain range, although it is not clear if those records correspond to an expansion process or to a lack of sampling. The species' global distribution was modelled to identify possible areas of expansion in the current environment and in a near future environment. To verify the effects of modelling a dynamic situation, the hypothetical expansion process from south to north was simulated in the current scenario. The species records were partitioned in four different datasets and modelled iteratively over a study area enclosing all records: records only from North Africa, from North Africa and South Iberian Peninsula, from North Africa and all the Iberian Peninsula, and from the entire distribution. The complete dataset was also used to extrapolate the model to a current and future global environmental scenarios. The models were compared by subtraction per pairs and by Cohen's Kappa. No spatio-temporal trends were detected in species records; therefore, the hypothesis of a recent expansion is nor supported. The species spread only to the Mediterranean part of the Iberian Peninsula when modelling only with African records, and to Europe when modelling also with Iberian records. The extrapolation models were moderately similar: large suitable areas were predicted in all the continents. Temperature variables contributed more to models. The species can expand to new suitable areas, although it is not possible to know if it would expand outside the biogeographical regions where the species is present.

scholarly journals Global biogeographical regions of freshwater fish species

2018 ◽  
Author(s):  
Boris Leroy ◽  
Murilo S. Dias ◽  
Emilien Giraud ◽  
Bernard Hugueny ◽  
Céline Jézéquel ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Clustering Algorithm ◽  
Fish Fauna ◽  
Freshwater Species ◽  
Global Database ◽  
Transition Zones ◽  
Freshwater Fish Species ◽  
Multiple Regions ◽  
Biogeographical Regions

AbstractAimTo define the major biogeographical regions and transition zones for freshwater fish species.TaxonStrictly freshwater species of actinopterygian fish (i.e., excluding marine and amphidromous fish families).MethodsWe based our bioregionalisation on a global database of freshwater fish species occurrences in drainage basins, which, after filtering, includes 11 295 species in 2 581 basins. On the basis of this dataset, we generated a bipartite (basin-species) network upon which we applied a hierarchical clustering algorithm (the Map Equation) to detect regions. We tested the robustness of regions with a sensitivity analysis. We identified transition zones between major regions with the participation coefficient, indicating the degree to which a basin has species from multiple regions.ResultsOur bioregionalisation scheme showed two major supercontinental regions (Old World and New World, 50% species of the world and 99.96% endemics each). Nested within these two supercontinental regions lie six major regions (Nearctic, Neotropical, Palearctic, Ethiopian, Sino-Oriental and Australian) with extremely high degrees of endemism (above 96% except for the Palearctic). Transition zones between regions were of limited extent compared to other groups of organisms. We identified numerous subregions with high diversity and endemism in tropical areas (e.g. Neotropical), and a few large subregions with low diversity and endemism at high latitudes (e.g. Palearctic).Main conclusionsOur results suggest that regions of freshwater fish species were shaped by events of vicariance and geodispersal which were similar to other groups, but with freshwater-specific processes of isolation that led to extremely high degrees of endemism (far exceeding endemism rates of other continental vertebrates), specific boundary locations, and limited extents of transition zones. The identified bioregions and transition zones of freshwater fish species reflect the strong isolation of freshwater fish faunas for the past 10 to 20 million years. The extremely high endemism and diversity of freshwater fish fauna raises many questions about the biogeographical consequences of current introductions and extinctions.

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