28 documents found, page 1 of 3

Tics, Functional Tics, TikTok and COVID-19: A Pediatric Case Report

Functional tics are a rare manifestation of the spectrum of functional neurological disorders. The phenomenological similarity with organic and simulated pathology poses important diagnostic challenges, but they should not be considered a diagnosis of exclusion. Recently there have been sudden outbreaks of bizarre tics in adolescent girls during the confinement imposed by the COVID-19 pandemic, whose appearance...

Changing webs—Variation of complex networks over a tidal cycle in an intertidal...

Incorporating temporal variation in models is one of the most important challenges in food web research. One of the environments where time causes profound changes is the intertidal zone, where the immersion-emersion cycle drastically changes the abiotic and biotic conditions. Intertidal rocky shores have been intensively studied, however the variation in the complex food web network that occurs during a tidal ...

Fisiopatologias e infecções oportunistas relacionadas com o vírus do HIV

O HIV destrói progressivamente certos glóbulos brancos do sangue chamados linfócitos CD4+. Os linfócitos ajudam a defender o corpo contra células estranhas e organismos infecciosos. Assim, quando o HIV destrói os linfócitos CD4+, as pessoas ficam vulneráveis ao ataque por muitos outros organismos infecciosos. Muitas das complicações da infecção por HIV, incluindo a morte, são geralmente resultados de outras inf...

Warming in shallow waters: Seasonal response of stress biomarkers in a tide poo...

Tide pools are rapidly warming environments with low thermal inertia, where organisms are exposed to potentially stressful conditions. This way, tide pools will be among the first and hardest hit environments by climate warming. Studies of thermal stress in situ are rare, but important so that current thermal stress in the wild can be confirmed and serve as reference for the future. This study aims to investiga...

Environmental factors impacting the abundance and distribution of amphipods in ...

Intertidal rock pools are considered critical habitats along coastal shores. Amphipods play an important role in intertidal rock pool ecosystems, as food resources for higher trophic levels and sometimes by enriching nutrients through grazing. However, the environmental factors driving their rockpool occupation remain largely unknown. We aimed to examine the importance of the large-scale wave action variation a...

Functioning of coastal food webs : intertidal rock pools as a case-study

Rocky intertidal ecosystems have long attracted the attention of biologists, being viewed as natural laboratories, where biodiversity and species-interactions could be easily investigated. However, intertidal rock pools have received much less attention that the surrounding emergent intertidal platforms. The aim of this thesis was to provide new insights into the trophic ecology of intertidal rock pools through...

Upper thermal limits and warming safety margins of coastal marine species - Ind...

Reliance of coastal intertidal food webs on river input – Current and future pe...

Climate change models predict an important decrease in precipitation in some parts of the world, which will lead to a decrease in river plume magnitude. River plumes can have an important enhancing effect on coastal secondary production and sustain important fisheries. Studies using stable isotopes have been proven successful in characterizing the energy pathways that sustain coastal fisheries and their depende...

High thermal tolerance does not protect from chronic warming – A multiple end-p...

Animal physiology and ecology are affected by increasing environmental temperatures, and this is particularly relevant in the tropics, where organisms are already living on the warm edge of their thermal windows. Here, we present data on sub-lethal effects of temperature (using molecular biomarkers), thermal tolerance, warming safety margins and body size shifts of a gastropod (Stramonita haemastoma) from tropi...

What's in a tide pool? Just as much food web network complexity as in large ope...

Understanding the fundamental laws that govern complex food web networks over large ecosystems presents high costs and oftentimes unsurmountable logistical challenges. This way, it is crucial to find smaller systems that can be used as proxy food webs. Intertidal rock pool environments harbour particularly high biodiversity over small areas. This study aimed to analyse their food web networks to investigate the...