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- W2226286983 abstract "he Atlanticrainforest is one of the species’ richest biomesand one of the most threatened, mainly by forest fragmentation. Marsupials and rodents aremost diverse group among the mammalsand influence the dynamics of Neotropical forests, being greatindicators of landscape changes. Furthermore, this group is importantto human health,because somespecies areinvolved in zoonotic cycles. Somerodents,in particular,are specific hosts for hantavirus;the monitoring of such species and the parasite transmission cycle in silent areas for hantavirus contributes to epidemiological studiesof the disease. The objectives of this study were: a) to perform an inventory ofsmall mammalsin fragmented Atlantic forest areas predominantly in the northwest regionof the Rio de Janeiro state; b) to identify specimensby integrative taxonomy; c) to evaluatethe influence of geographic variables and habitat characteristics in species composition; d) to evaluate the hantavirus infection in rodents and to investigate habitat preference of the infected species. Thecaptured animals were identified by external morphology, karyotypeand molecular analyses for the genus Trinomys, Calomys, Akodonand Oligoryzomys. The influence of fragment size, shape and degree of isolation, distance between fragmentsand habitatfeatures (complexity and heterogeneity) on species composition was tested using a multiple regression of dissimilarity matrices.Species composition in fragments and fragmented landscapes as a whole was then evaluated by cluster analysis using Jaccard similarity index and Wad’s method of linkage. The serum samples of rodents were subjected to enzyme-linked immunonosorbent assay (ELISA) to detect hantavirus infection. The habitat preference of Akodon cursor(the only species infected with hantavirus)was tested by generalized linear modelwith habitat features (the first three principal components of a Principal Component Analysis) as independent variables and A. cursorabundance in capture stations as the dependent variable. We obtained 128rodents and 81 marsupials captured in 11 forest fragments and areasin the disturbed matrixin the municipalities of Cambuci, Miracema,Sumidouro e Varre-sai. The species composition of small mammals was not influenced by any geographic and habitat descriptors. In the dendrogram generated by the similarity in species composition in fragments,we observed that fragments containing only generalist species were clusteredseparately from those thathad at least one specialist species. Similarly, conserved landscapes clustered separately from disturbedones. Akodoncursorpreferredareas with more open and low canopy height, with open understory,more herbaceouscoverand woody stems, showing that this species is adapted to disturbed habitats. The occurrence of hantaviruscirculationin thisrodent and itspreference for altered habitat, signals the importance of monitoring studies aboutthe this zoonosisin the state of Rio de Janeiro, especially in areas where the landscape is fragmented and composed of generalist species" @default.
- W2226286983 created "2016-06-24" @default.
- W2226286983 creator A5066157682 @default.
- W2226286983 date "2014-01-01" @default.
- W2226286983 modified "2023-09-26" @default.
- W2226286983 title "Pequenos mamíferos em paisagens fragmentadas do estado do Rio de Janeiro e implicações na transmissão de Hantavírus" @default.
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