22 documents found, page 1 of 3

Biodiversidade subterrânea de Portugal: de deserto biológico a hotspot de class...

Subterranean biodiversity is typically dominated by invertebrates, among which arthropods are the most diverse group of animals. In the vast, inaccessible immensity of subterranean ecosystems, caves provide access to tiny windows for observing the composition and functioning of these habitats. Portugal was considered a country poor in cave diversity, however, the advancement of multidisciplinary research in the...

Impactos da contaminação por fármacos em ecossistemas de águas subterrâneas

Os ecossistemas subterrâneos são uma importante fonte de água potável, da qual depende a maioria da população humana. A água subterrânea é também um importante ecossistema, repleto de espécies únicas que vivem em completa escuridão, a chamada estigofauna. Estas cujas comunidades têm pouca redundância funcional, sendo muito vulneráveis a perturbações de origem antropogénica. Os aquíferos são poluídos por grande ...

Bacterioplankton community diversity of a portuguese aquifer system (Maciço Cal...

Climate change may increase the vulnerability of aquifers to contamination through extreme precipitation and extended drought periods. Therefore, the understanding of groundwater ecosystem dynamics is crucial, with bacterial assemblages playing a major role in biogeochemical cycles. The present research describes a geospatial study targeting the bacterial community structure of groundwaters from the largest kar...

Brazilian cave heritage under siege

Sensitivity of a widespread groundwater copepod to different contaminants

Groundwater is an indispensable resource for humankind and sustainable biomes functioning. Anthropogenic disturbance threatens groundwater ecosystems globally, but to which extent groundwater organisms respond to stressors remains poorly understood. Groundwater animals are rare, with small populations, difficult to find and to breed in the lab, which poses a main challenge to the assessment of their responses t...

The cavernicolous Oniscidea (Crustacea: Isopoda) of Portugal

The study of subterranean Oniscidea in Portugal has been neglected for nearly 70 years, but recent investigations have revealed high diversity. All the terrestrial isopods known from caves of mainland Portugal, including data from the literature and new material, are listed, revealing new biodiversity patterns. Twenty-seven species, belonging to 15 genera and six families, are known, of which 16 species are con...

Hypogenic versus epigenic subterranean ecosystem: lessons from eastern Iberian ...

Over the last 40 years, hypogenic karst/caves have become well known and hypogene speleogenesis has been used to explain the formation of some of the largest subterranean maze caves. These hypogenic systems involve confined aquifers with upwards flow, responsible for their karstification. Such spaces begun and could be remain isolated from the surface and the contiguous subterranean habitats, including the shal...

A new threat to groundwater ecosystems: first occurrences of the invasive crayf...

The American red swamp crayfish, Procambarus clarkii, is today the alien species most widespread in European water bodies. This invasive crayfish was found for the first time in some caves of Europe, specifically in Portugal and Italy. The presence of P. clarkii in caves is noteworthy, representing a new threat for the groundwater ecosystems due to the possible negative impacts on the native communities.

A new species of duvalius from world's deepest cave (Coleoptera: Carabidae)

The new hypogean ground beetle, Duvalius abyssimus n. sp., from Krubera-Voronja, world’s deepest cave (Arabika massif, Western Caucasus) is described and illustrated. Diagnostic morphological characters of the imago, male and female genitalia are provided. Its relations with other Duvalius Delarouzée species from the Western Caucasus geographic area are discussed. An updated overview of the biocoenosis of its p...

Insular species swarm goes underground: two new troglobiont Cylindroiulus milli...

Two new species of the genus Cylindroiulus Verhoeff, 1894, C. julesvernei and C. oromii, are described from the subterranean ecosystem of Madeira Island, Portugal. Species are illustrated with photographs and diagrammatic drawings. The new species belong to the Cylindroiulus madeirae-group, an insular species swarm distributed in the archipelagos of Madeira and the Canary Islands. We discuss the differences bet...