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Top-down effect of arthropod predator chinese mitten crab on freshwater nutrien...
Lin Wang; Hongjun Liu; Carvalho, Francisco André Costa; Yunru Chen; Linshiyu Lai; Jiachun Ge; Xingjun Tian; Yunchao LuoAquatic litter decomposition is highly dependent on contributions and interactions at different trophic levels. The invasion of alien aquatic organisms like the channeled apple snail (Pomacea canaliculata) might lead to changes in the decomposition process through new species interactions in the invaded wetland. However, it is not clear how aquatic macroinvertebrate predators like the Chinese mitten crab (Erioc...
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...
Temperature and inter-specific competition alter the impacts of an invasive cra...
Carvalho, Francisco André Costa; Sousa, Ronaldo Gomes; Cássio, Fernanda; Pascoal, Cláudia[Excerpt] Climate change is expected to alter the impacts of invasive species due to changes in their density, behaviour and phenology. As omnivorous and ectotherms, invasive cray!sh species are particularly in"uenced by temperature and alter their impacts on native species by changing the consumption of native invertebrate preys, changing competitive interactions or increasing their impacts on key ecosystem pr...
Wildfire impacts on freshwater detrital food webs depend on runoff load, exposu...
Carvalho, Francisco André Costa; Pradhan, Arunava; Abrantes, Nelson José Cabaços; Campos,Isabel; Keizer, Jan Jacob; Cássio, Fernanda; Pascoal, CláudiaIn the last decades, land-use changes have made Mediterranean forests highly susceptible to wildfires, which can cause several impacts not only on burnt areas, but also on adjacent aquatic ecosystems. Post-fire runoff from burnt areas may transport toxic substances to streams by surface runoff, including polycyclic aromatic hydrocarbons (PAHs) and metals, which can be noxious to aquatic organisms. Impacts on aq...
Direct and indirect effects of the invasive crayfish Pacifastacus leniusculus o...
Carvalho, Francisco André Costa; Pascoal, Cláudia; Cássio, Fernanda; Teixeira, Amílcar; Sousa, Ronaldo GomesThe crayfish Pacifastacus leniusculus is one of the most problematic invasivespecies in aquatic ecosystems in Europe. The crayfish may play an important role in plant-litter decompositionthrough directconsumption of plant litteror by changing the density and/or the behavior of native invertebratedetritivores.However,these effects remain poorly studiedand may be context dependent.Therefore, we selected two river...
Direct and indirect effects of an invasive omnivore crayfish on leaf litter dec...
Carvalho, Francisco André Costa; Pascoal, Cláudia; Cássio, Fernanda; Sousa, Ronaldo GomesInvasive alien species (IAS) can disrupt important ecological functions in aquatic ecosystems; however, many of these effects are not quantified and remain speculative. In this study, we assessed the effects of the invasive crayfish Procambarus clarkii (Girard, 1852) on leaf litter decomposition (a key ecosystem process) and associated invertebrates using laboratory and field manipulative experiments. The crayf...
Impacts of invasive omnivore predators on plan litter decomposition in streams:...
Carvalho, Francisco André CostaThe introduction of non-indigenous invasive species (NIS) has gained momentum in Ecology in recent years mainly because they can cause changes in biodiversity or they may function differently than the native species. In forested streams, the canopy of riparian vegetation decreases the availability of light in freshwater ecosystems and, so, plant litter from riparian vegetation is the main source of energy for m...
Does the riparian stand and age affect ecosystem functioning in streams?
Carvalho, Francisco André Costa; Sahadevan, Seena; Pascoal, Cláudia; Cássio, FernandaIn riparian restoration projects tree species are often planted in assemblages that diverge from patterns seen in natural communities. This restoration practice may have consequences on the aquatic ecosystem processes as streams obtain energy from leaf litter inputs in the riparian zones. Leaf litter decomposition in streams is a vital ecosystem-level process, which depends on the activity of microorganisms and...