Hypertrophic cardiomyopathy in a domestic cat (Felis catus) associated with acute myocardial infarction

A cardiomiopatia hipertrófica (CMH) é a desordem cardíaca mais comum em gatos, caracterizada por disfunção diastólica e insuficiência cardíaca congestiva. Episódios de tromboembolismo são descritos frequentemente, podendo em alguns casos envolver o miocárdio e resultar em infarto e comprometimento hemodinâmico cardíaco. Relata-se um caso de CMH em gato doméstico (Felis catus) macho adulto que morreu com sinais graves de congestão e baixo débito cardíaco. À histopatologia observaram-se alterações necroinflamatórias envolvendo o átrio direito e as paredes ventriculares esquerda e direita, compatíveis com infarto miocárdico agudo focalmente extenso. No átrio direito identificou-se ainda tromboembolismo coronariano, sendo este, presumivelmente, a causa do infarto em tal paciente. _______________________________________________________________________________ ABSTRACTHypertrophic cardiomyopathy (HCM) is the most common cardiac disease in cats, characterized by diastolic dysfunction and congestive heart failure. Thromboembolic episodes are frequently described and in some cases it may involve the myocardium and may cause infarction and cardiac hemodynamic compromise. A case of HCM in an adult male domestic cat (Felis catus) that died with signs of serious congestion and low cardiac output is described. Necro-inflammatory alterations were observed at histopathological evaluation involving the right atrium and left and right ventricular walls, compatible with focally extensive acute myocardium infarction. Coronary thromboembolism was yet identified in the right atrium and it was presumably the cause of infarction in this patient

Do mel (ao arco das) cinzas: sobre a ecologia das abelhas e dos territórios dos povos indígenas isolados na fronteira amazônica

The eastern and southwestern borders of the Amazon have been the scene of an intense process of deforestation and land grabbing, where through the use of fire, the systematic conversion of forests into monocultures and pastures for cattle is carried out. In this context, the soil is being poisoned by the (de)regulation of the use of pesticides, and rivers and streams are disappearing more quickly. With the extermination of pollinators, soon all the agricultural production systems of this great region will be directly impacted, and little by little, the arch of fire, as this territory is known, will become an arch of ash and ruins. But there are other less obvious but no less worrisome impacts in this dramatic destructive process. This territory corresponds to the home of all the uncontacted Tupi indigenous peoples of the Brazilian Amazon. Communities that, like the Awá-Guajá of Maranhão and Kagwahiva of Mato Grosso, are formed by very small groups that live in the last forest strongholds of these Amazonian frontiers. The extinction of bees in these territories jeopardizes the deep relationship between indigenous peoples and this entomofauna, and the pattern of mobility and itinerancy related to the collection and extraction of honey, a practice of great relevance in this indigenous Tupi context.As fronteiras do leste e sudoeste amazônico têm sido palco de intenso processo de desmatamento e grilagem de terras públicas, onde, via a utilização do fogo, é realizada a conversão sistemática de florestas em monoculturas e pastagens para o gado. Neste contexto, os solos vão sendo envenenados pela (des) regulamentação do uso de agrotóxicos e rios e igarapés vão desaparecendo mais rapidamente. Com o extermínio dos polinizadores, logo todos os sistemas de produção agrícola desta grande região se verão diretamente impactados, e aos poucos, o arco do fogo, como é conhecido esse território, vai se convertendo em um arco de cinzas e ruínas. Mas há outros impactos menos evidentes, mas não menos preocupantes, neste dramático processo destrutivo. Esse território corresponde ao lar de todos os povos indígenas isolados tupi da Amazônia brasileira. Comunidades que, a exemplo dos Awá-Guajá do Maranhão e Kagwahiva do Mato Grosso, são formados por grupos bastante reduzidos e que vivem nos últimos redutos florestais destas fronteiras amazônicas. A extinção das abelhas nesses territórios coloca em xeque uma profunda relação dos povos indígenas e esta entomofauna, expressa no padrão de mobilidade e itinerância relacionados à coleta e extração do mel, prática de grande relevância neste contexto indígena tupi

The Influence of the Intermittent Behavior of the Nocturnal Atmospheric Flow on the Prediction of the Diurnal Temperature Range: A Simplified Model Analysis

The variation of the atmospheric temperature near the surface associated with anthropogenic effects is analyzed using a simplified atmospheric model. Local changes in cloud cover and four different scenarios of atmospheric concentration of carbon dioxide are considered. The results show that the highest temperature variability occurs in the weak wind and decoupled state and in the transition between flow regimes. In agreement with previous efforts, the results indicate that the reduction of diurnal temperature range is related to the existence of two distinct flow regimes in the stable boundary layer. However, in the decoupled state, the occurrence of intermittent bursts of turbulence may cause temperature variations among the different scenarios to become unpredictable. It implies that it is difficult to predict the diurnal temperature range in places where low winds are common

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

An estimate of the number of tropical tree species

The high species richness of tropical forests has long been recognized, yet there remains substantial uncertainty regarding the actual number of tropical tree species. Using a pantropical tree inventory database from closed canopy forests, consisting of 657,630 trees belonging to 11,371 species, we use a fitted value of Fisher’s alpha and an approximate pantropical stem total to estimate the minimum number of tropical forest tree species to fall between ∼40,000 and ∼53,000, i.e. at the high end of previous estimates. Contrary to common assumption, the Indo-Pacific region was found to be as species-rich as the Neotropics, with both regions having a minimum of ∼19,000–25,000 tree species. Continental Africa is relatively depauperate with a minimum of ∼4,500–6,000 tree species. Very few species are shared among the African, American, and the Indo-Pacific regions. We provide a methodological framework for estimating species richness in trees that may help refine species richness estimates of tree-dependent taxa