Nivea Dias dos Santos

Federal Rural University of Rio de Janeiro | UFRRJ · Department of Botany

Tropical rainforests are subject to changes over time, further accelerated under anthropic pressure. We investigated the influence of anthropogenic disturbances and vegetation cover on the taxonomic and functional structure of assemblages of bryophytes in three rainforests in Brazil. The parameters analyzed were richness, composition and beta diver...

The Itatiaia National Park protects important Atlantic Forest remnants as well as a large number of rare bryophyte species. We reassessed the conservation status of 45 species of endemic and/or threatened mosses occurring in high-altitude fields in the Park. The conservation analysis followed the International Union for Conservation of Nature guide...

Andreaea subulata is a moss species that occurs throughout the Southern Hemisphere. In Brazil, it is restricted to high-altitude fields in the state of Rio de Janeiro. The last recorded collection of this species in the country was made 95 years ago in the Itatiaia National Park (INP). It was never seen or collected again since then and it was, the...

Capítulo do livro de memórias do 72º Congresso Nacional de Botânica (organizado por Moura & Shimizu 2022), utilizado como base da palestra "Campos de altitude: ecossistemas prioritários para a conservação de briófitas" proferida por Nivea D Santos no Simpósio sobre Diversidade e Conservação de Briófitas

ABSTRACT High-Altitude Fields are ecosystems with high bryophyte abundances and diversities. One of the principal threats to these ecosystems are wildfires, which mainly affect terricolous species. Chronosequence studies can aid in understanding post-fire effects on bryophytes. We studied terricolous assemblages of bryophytes in the High-Altitude F...

ABSTRACT The Atlantic Forest contains more bryophyte species and greater endemism than any other Brazilian phytogeographic domain. We analyzed the bryoflora of an Atlantic Forest remnant along the southern Brazilian coast to examine: (i) floristic composition, species richness, life forms and bryocenological groups in different phytophysiognomies (...

In forest enclaves known as Brejos de Altitude (forest refuges) in northeastern Brazil, floristic affinities are generally explained by historical processes of vicariance. However, for poikilohydric plants with long distance dispersal such as bryophytes, the present work predicts that floristic similarities result from environmental affinities betw...

Biological soil crusts (biocrusts) are important biological components in arid and semi-arid regions because they can serve as ecological facilitators for the vascular flora. Biocrusts of rocky outcrops of the Caatinga biome in the semiarid region of Northeast Brazil are comprised mainly of populations of the pioneer moss Campylopus lamellatus. Mea...

Os conjuntos de variáveis demonstraram certa independência entre si, que pode ser explicada por uma maior importância da fisiologia na adaptabilidade das briófitas a diversas condições e pressões ambientais. Porém, considerando-se o pequeno número de descritores anatômicos quando comparado ao número de espécies e microhabitats analisados, estudos a...

Elevational gradients can serve as powerful tools for testing ecological relationships between species richness versus environmental variables. Although the patterns be usually from positive to humpedshaped, elevational gradients may run in a negative way with the species richness decreasing in relation to the altitude. The floristic gradient may v...

The use of multivariate analyses in diverse ethnosciences has greatly increased in recent decades, allowing for quantitative studies of different questions related to traditional knowledge and its applications. The potential use of those analytical tools, however, has still been modest in terms of the field of ethnoecology. Within that context, the...

O Parque Nacional do Itatiaia (PNI) possui amplo gradiente altitudinal, o que possibilita a existência de diferentes tipos de fitofisionomias florestais, além de campos de altitude. Os campos de altitude do PNI abrigam uma brioflora única, com elevada diversidade, endemismo e número de espécies ameaçadas de extinção. Este trabalho teve por objetivo...

The ready availability of water resources distinguishes the humid forest of Chapada do Araripe, Ceará State, Brazil, from the semiarid vegetation around it. The regional climate demonstrates a marked seasonality of rainfall that affects the ecological strategies of the species found there. We studied the bryophytes of the humid forest of Chapada do...

The species-area relationship (SAR) is one of the oldest and most studied ecological models, having even served as the foundation of the Theory of Island Biogeography. Nevertheless, the relative importance of habitat heterogeneity to SAR remains poorly understood. Our aim was to test the relative importance of habitat heterogeneity to the SAR of br...

Os livros didáticos brasileiros passaram por diversas modificações nas últimas décadas, sendo este, um processo concomitante às mudanças na ciência e sociedade. Neste sentido, os objetivos do trabalho foram analisar crítica e comparativamente como a sexualidade e o ciclo de vida das plantas são tratados em livros de ciências do 7º ano, além de prop...

Brazilian ironstone outcrops (“Cangas”) are characterized by high soil iron concentrations, high ambient temperatures, strong water restrictions, and occupation by vascular plants showing high levels of rarity and/or endemism. Another group of plants commonly inhabiting Cangas are bryophytes, which have important roles in maintaining soil moisture...

In order to better understand the influence of short elevational gradient on the attributes of bryophyte communities, we examined the bryophyte flora within six elevational belts (10, 50, 400, 800, 950, and 1170 m a.s.l.) on a mountain in the Atlantic Forest in southeastern Brazil. Ten subplots (10 × 10 m) distributed randomly in 1 ha forest plot o...

Rocky outcrops are distinctive formations in arid and semiarid zones, characterized by the presence of plant species with functional traits related to water deficit and high temperature tolerance. These areas are also characterized by high habitat heterogeneity. We tested three hypotheses related to organization of moss communities in rocky outcrop...

The south-eastern Brazil comprises the Atlantic forest (a region mainly characterized by tropical evergreen forest), subtropical forest, mangroves, and scrub sandbanks. Sandy areas are found at sea level, and high altitude grassland spots and rocky outcrops occur above 2000 m. This region is important because the richness, diversity, and endemism o...

The South American corridor of seasonally dry vegetation (SACSV) includes different types of physiognomies forming a continuous corridor with high biodiversity and endemism; however, little attention has been paid to the conservation of the SACSV. As this is an area with great diversity, cataloguing all the species is challenging. Thus, we suggest...

Conhecendo a comunidade de briófitas nas Cangas de Minas Gerais, Brasil

Paper presents couple of new national and regional bryophyte records accross the world, including Europe, Asia, Africa, Central and South America, Antarctica. In Europe there are interesting findings from Poland (Sphagnum molle, Pseudocalliergon lycopodioides), Hungary (Seligeria acutifolia), Bulgaria and Macedonia (Didymodon icmadophilus), etc. A...

ABSTRACT Environmental conditions in distinct tropical rainforest phytophysiognomies can act as regional filters in determining the distribution of montane bryoflora likewise, local filters inherent to phorophyte species can have modulating influences. We analyzed the bryophyte communities in three phytophysiognomies of Atlantic Forest, in order to...

Syzygiella rubricaulis is a dioecious, leafy liverwort disjunctly distributed and restricted to high-altitude mountains in the Neotropics and the Azores. This study is part of a larger project examining the phylogeography of S. rubricaulis in the Neotropics, and our main goals were to understand its reproductive biology, where sex-expression occurs...

Atualmente estamos rodeados por tecnologias que facilitam a busca por informação. Porém, quando se trata do processo de ensino-aprendizagem, o livro didático continua sendo unanimidade entre professores e alunos. O Programa Nacional do Livro Didático para o Ensino Médio (PNLEM) foi criado em 2003, objetivando a avaliação criteriosa e distribuição d...

Bryoflora of the Itatiaia National Park along an elevational gradient: diversity and conservation). Itatiaia National Park harbors a unique bryoflora due to presence of different forest formations and well-defined climatic and vegetation bands: Montane Forest, Upper Montane Forest, and High-Altitude Fields (Campos de Altitude). Analysis of bryophyt...

The rocky outcrops are indeed islands amidst a "sea" of soil and thus their floristic composition and species diversity are influenced by stochasticity. Our discovery was settled to regional level, mainly from the Mantel tests (rM = 0.41, p = 0.01) and partial Mantel (rM = 0.41, p = 0.03), significant when contrasting the floristic x geographical d...

Liverworts are non-vascular cryptogamic plants with wide geographic distributions due to their capacity to disperse their spores over long distances, although they have no epidermal cuticle, sensitive to external environmental conditions, found only in very specific microenvironments – and are therefore widely used as bioindicators. We evaluated th...

A revised moss checklist for Brazil recognizes 892 species of mosses in 255 genera and 70 families. Endemic taxa comprise 23% of the known flora. The Brazilian distribution, altitudinal range in the country, and world distribution are provided for all species. A list of 383 excluded species is provided.

We recorded evidence for herbivory in the mosses Hypopterygium tamarisci and Lopidium concinnum in a tropical rainforest (São Paulo State, Brazil). We described this herbivory quantitatively, measured the protein and phenol abundance, and identified potential herbivores in the laboratory. We sampled plants from 10 colonies of each species in the ye...

Bryophytes are indicators of climatic, environmental and ecology conditions and are useful in the characterization of the vegetation types. In this study, we analyzed the brioflora of 2-ha plots, one of Restinga Forest (RF) and the other of Lowland Ombrophilous Dense Forest (LF), located in the Núcleo Picinguaba, State Park of Serra do Mar (São Pau...

This work analyzes the phytogeographic patterns of the liverwort flora of the Atlantic Forest of the Rio de Janeiro State, south-eastern Brazil. The analysis was based on inventories made in fragments of Atlantic Forest in the state, collections from the RB herbarium, and information from the checklist and database of the bryoflora of Rio de Janeir...

An analysis of liverwort diversity in Rio de Janeiro state has been done, with the objective to elucidate the richness and floristic composition of the different formations of the Atlantic Forest, and the influence of the altitudinal gradient on the liverworts. For this, data from literature, herbarium, floristic inventories and data bank of the st...

The International Union for the Conservation of Nature and Natural Resources (IUCN) developed a guide for assessment of species' threat level at a regional scale, which was the basis for the reassessment of liverwort conservation status in the state of Rio de Janeiro, four years after the first analysis. Of 360 taxa occurring in the state, 75 were...

A bryological survey in southeastern Brazil revealed a new species, Cylindrocolea brasiliensis (Cephaloziellaceae). The principal distinguishing character of this species is the dentate margin of the ventral leaf-lobe. The new species is described, illustrated and discussed, and an updated key to the Brazilian species of Cylindrocolea is provided.

Foi realizado o levantamento das briófitas da RPPN El Nagual, uma área de floresta submontana no Estado do Rio de Janeiro. Foram registradas 137 espécies (um antócero, 70 hepáticas e 66 musgos) e duas variedades, distribuídas em 75 gêneros e 37 famílias, sendo cinco novas ocorrências para o estado. Lejeuneaceae (27 spp.), Pilotrichaceae (17 spp.),...

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