145 documents found, page 1 of 15
Invasive dynamics of the signal crayfish Pacifastacus leniusculus in a protecte...
Carvalho, Francisco; Alves, Henrique; Pascoal, Cláudia; Castro, Paulo; Miranda, Fernando Jorge Veloso; Teixeira, Amílcar; Cássio, FernandaInvasive species have been drivers of biodiversity loss and functional changes in aquatic ecosystems, including in protected areas. Therefore, monitoring population invasion dynamics and biological traits is fundamental to better understand their ecological and economic impacts and for management actions development. We followed signal crayfish (Pacifastacus leniusculus) invasion in Rabaçal River upper reach at...
Non-interactive effects drive multiple stressor impacts on the taxonomic and fu...
Lourenço, J.; Gutiérrez-Cánovas, C.; Carvalho, F.; Cássio, Fernanda; Pascoal, Cláudia; Pace, GiorgioFreshwaters are considered among the most endangered ecosystems globally due to multiple stressors, which coincide in time and space. These local stressors typically result from land-use intensification or hydroclimatic alterations, among others. Despite recent advances on multiple stressor effects, current knowledge is still limited to manipulative approaches minimizing biological and abiotic variability. Thus...
Extreme weather events threaten biodiversity and functions of river ecosystems:...
Sabater, Sergi; Freixa, Anna; Jimenez, Laura; López-Doval, Julio; Pace, Giorgio; Pascoal, Cláudia; Perujo, Núria; Craven, DylanBoth gradual and extreme weather changes trigger complex ecological responses in river ecosystems. It is still unclear to what extent trend or event effects alter biodiversity and functioning in river ecosystems, adding considerable uncertainty to predictions of their future dynamics. Using a comprehensive database of 71 published studies, we show that event - but not trend - effects associated with extreme cha...
Drying shapes the ecological niche of aquatic fungi with implications on ecosys...
Arias-Real, Rebeca; Menendez, Margarita; Munoz, Isabel; Pascoal, CláudiaFungi are among the most abundant and diverse organisms on Earth and play pivotal roles in global carbon processing, nutrient cycling and food webs. Despite their abundant and functional importance, little is known about the patterns and mechanisms governing their community composition in intermittent rivers and ephemeral streams, which are the most common fluvial ecosystems globally. Thus far, it is known that...
Combined per-capita and abundance effects of an invasive species on native inve...
Carvalho, Francisco; Pascoal, Cláudia; Cássio, Fernanda; Teixeira, Amílcar; Sousa, Ronaldo GomesInvasive alien species (IAS) are leading to the homogenisation of taxonomic and functional biodiversity, with negative consequences for key ecosystem processes in fresh water. Invasive signal crayfish (Pacifastacus leniusculus) is expected to disrupt detritus-based food webs by affecting leaf breakdown and/or by decreasing invertebrate density and diversity through predation. The combination of per-capita and a...
Remote sensing indicators to assess riparian vegetation and river ecosystem health
Pace, Giorgio; Cánovas, Cayetano Gutiérrez; Henriques, R.; Carvalho-Santos, Claudia; Cássio, Fernanda; Pascoal, CláudiaEnvironmental managers need information to quickly detect which stressor combinations should be addressed to reverse river degradation across large study areas. The pivotal role of riparian vegetation in regulating thermal regimes and inputs of light, nutrients and organic matter has made it a major target of stressor-mitigation and conservation actions. However, due to the dendritic and extensive nature of riv...
Temperature and interspecific competition alter the impacts of two invasive cra...
Carvalho, Francisco André Costa; Sousa, Ronaldo Gomes; Cássio, Fernanda; Pascoal, CláudiaClimate change is expected to alter impacts of invasive alien species (IAS). As omnivores and ectotherms, invasive crayfish species (ICS) can be particularly influenced by altered thermal regimes with possible impacts on native species and key ecosystem processes, such as leaf-litter breakdown. We performed a controlled study using a multi-trophic approach to assess the individual and combined effects between t...
Hydrobiology: a new open access journal for the rapid dissemination of the late...
Pascoal, Cláudia[Excerpt] We are pleased to announce the launch of Hydrobiology (ISSN 2673-9917) [1], a new open access journal that offers an excellent opportunity to establish an exciting forum for the discussion and dissemination of high-quality research in freshwater and marine biology, limnology, fisheries, oceanography, and aquatic ecology. We welcome innovative, hypothesis-driven papers on current scientific challenges ...
Modeling the effectiveness of sustainable agricultural practices in reducing se...
Ramião, José Pedro Macedo Vale; Carvalho-Santos, Claudia; Pinto, Rute; Pascoal, CláudiaWater pollution from unsustainable agricultural practices is a global problem that undermines human health and economic development. Sustainable agricultural practices have been considered to maintain global food production without compromising water quality and ecosystem health. However, the effectiveness of sustainable agricultural practices in reducing sediments and nutrient export and the combination of pra...
ITS rDNA barcodes clarify molecular diversity of aquatic hyphomycetes
Franco-Duarte, Ricardo; Fernandes, Isabel; Gulis, Vladislav; Cássio, Fernanda; Pascoal, CláudiaAquatic hyphomycetes are key microbial decomposers of allochthonous organic matter in freshwater ecosystems. Although their importance in carbon flow and food webs in streams is widely recognized, there are still gaps in our understanding of their molecular diversity and distribution patterns. Our study utilized the growing database of ITS rDNA barcodes of aquatic hyphomycetes (1252 sequences) and aimed to (i) ...