Víctor Osorio

Spanish National Research Council | CSIC · Center for Advanced Studies of Blanes

Widespread fish introductions into originally fishless mountain lakes have had severe consequences for native biota, including aquatic macroinvertebrates, which provide important food subsidies for terrestrial and semiaquatic insectivores like shrews (Fam. Soricidae). Since both fish and shrews rely on aquatic macroinvertebrates as food, whether in...

Catchment urbanisation results in urban streams being exposed to a multitude of stressors. Notably, stressors originating from diffuse sources have received less attention than stressors originating from point sources. Here, advances related to diffuse urban stressors and their consequences for stream benthic communities are summarised by reviewing...

In this study we present results from a survey of 49 high mountain lakes in the Pyrenees including lakes from the Aigüestortes i Estany de Sant Maurici National Parc, which range from ultraoligotrophic to mesotrophic. Lakes are representative of four major scenarios: fishless, with trout, with minnows and with both trout and minnows. Overall, the e...

As part of the BIOOCULT project, we compared the results coming from the high-throughput sequencing of barcodes (DNA metabarcoding) and the morphology-based identification approach applied on samples from 38 lakes and 9 streams within the National Park and nearby areas. The samples of benthic macroinvertebrates, planktonic crustaceans and fish stom...

In order to prevent the introduction in high mountain lakes of species such as the european minnow (Phoxinus sp.), it is necessary to know which species are being introduced and the possible routes of introduction. This study focuses on the genetic analysis of different populations from high mountain lakes and streams from the National Park and oth...

Lake Dres (Gran Paradiso National Park) is situated at 2,048 m above sea level (asl) at the local treeline. (https://onlinelibrary.wiley.com/doi/10.1002/aqc.3868)

Introduced fish are a widespread ecological threat in originally fishless high mountain lakes. However, basic distribution data are largely missing for most high mountain regions. Using time‐consuming standard methods (e.g. Nordic standard fishing nets) to assess fish distribution and relative densities at a relevant spatial scale can be impractica...

Despite being naturally fishless, the widespread introduction of trout and minnows is threatening the conservation of high mountain lakes all over the world. Previous studies have reported that amphibians quickly disappear after trout introduction, followed by many conspicuous invertebrates. Here, we have studied the effects of minnows versus trout...

Publicada en catalán la guía de campo “Macroinvertebrados fluviales de Cataluña”, escrita por investigadores del CEAB-CSIC y de la UB. El libro incluye las familias de macroinvertebrados más frecuentes y relevantes de los ríos catalanes ordenadas en 110 fichas, que contienen una descripción morfológica detallada y fotografías para su correcta ident...

The corixid Sigara (Subsigara) distincta (Fieber, 1848) in the Pyrenees: a first record for Spain and an unsolved taxonomic puzzle The occurrence of Sigara (Subsigara) distincta (Fieber, 1848) in Spain is reported for the first time based on specimens collected in the Pyrenean municipality of Vielha e Mijaran (Central Pyrenees). Multiple captures b...

Amphibians of high mountain lakes face many threats related to global change, including novel pathogens, development, climate change and overexploitation. However, the foremost threat is the presence of non-native fish. One of the objectives of the LIFE+ LIMNOPIRINEUS project (2014-2019) was the recovery of protected amphibian communities (includin...

It has been ten years since the first version of the Checklist of Heteroptera of Catalonia (Goula et al., 2010b), and both the general taxonomic changes within the suborder Heteroptera (Schuh & Weirauch, 2020) and the synonimies and incorporations that took place in this decade made it necessary to review and amend the previous document. The new pa...

Historical factors (colonization scenarios, demographic oscillations) and contemporary processes (population connectivity, current population size) largely contribute to shaping species’ present‐day genetic diversity and structure. In this study, we use a combination of mitochondrial and nuclear DNA markers to understand the role of Quaternary clim...

In this study, the presence, distribution, and chorology of more than 3,000 individuals belonging 38 families and 173 species of Heteroptera from the Canary Islands has been revised. Specimens of the suborder Heteroptera were collected from the different islands and an updated checklist of the species occurring in the archipelago is presented. Thre...

Pyrenean lakes are home to a specific yet poorly known biodiversity, particularly because of the access conditions (approach walk and aquatic environment). Investigations were necessary so that conservation and/or management programmes on the fauna and flora of the lakes could be envisaged on the basis of more complete, robust and shared knowledge....

Abstract The LIFE+ LimnoPirineus project (2014-2019) includes the recovery of amphibian populations in eight lakes of Aigü estortes i Estany de Sant Maurici National Park and Alt Pirineu Natural Park, by eradicating or controlling non-native fish. During the summers from 2014-2018 practically all of the fish present in the lakes were removed. We fo...

Aquesta és la primera guia de camp sobre els heteròpters a Catalunya. En ella hi trobareu les espècies més comunes i també una àmplia representació de les famílies del país. El volum recull 142 espècies, ordenades en fitxes que inclouen una fotografia per poder-les identificar i altres dades d’interès com ara el nom científic, la mida, la família,...

In this study, we present the preliminary results from the first sampling under the LIFE project LIMNOPIRINEUS, performed in summer 2014. We sampled 26 lakes with relatively similar morphometric and physicochemical characteristics that differed primarily in terms of the presence of fish. The aim was go see if fish had any effect on different groups...

A checklist of 43 Heteropteran species collected in the area of influence of Can Coll School of Nature is given. By its rarity in the Catalan fauna, the mirid Deraeocoris (D.) schach (Fabricius, 1781) and the pentatomid Sciocoris (N.) maculatus Fieber, 1851 are interesting species. Plus being rare species, the mirid Macrotylus (A.) solitarius (Meye...