Niche Assembly
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Local environmental controls of Atlantic Forest tree community assembly on a coastal continental island in southeastern Brazil
ABSTRACT Tropical forests with high species diversity are commonly found in rugged montane areas. We investigated causes of local tropical forest tree community assembly on a continental island with heterogeneous terrain. We recorded tree community (absolute species abundance), topography, soil, litter and location in 40 sampling units on two opposite sides
Acta Bot. Bras.. Publicado em: 29/11/2018
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2. Phylogenetic community structure reveals differences in plant community assembly of an oligotrophic white-sand ecosystem from the Brazilian Atlantic Forest
ABSTRACT Mussununga, an oligotrophic sandy savanna ecosystem, comprises distinct physiognomies along fire, water and nutrient availability gradients. Grasslands and woodlands are constrained at the opposite poles of these gradients, with grasslands occurring in areas with poorer soils and higher levels of both water-stress and fire intensity. According to th
Acta Bot. Bras.. Publicado em: 21/09/2017
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3. Riqueza das espécies e diversidade na Mata Atlântica e ecossistemas associados: teorias de nichos e forças neutras / Species richness and diversity in the Atlantic Rainforest and associated ecosystems: niche assembly theories and neutral forces
Na primeira parte desta tese, dois levantamentos fitossociológicos realizados em vegetação decampo rupestre são apresentados e comparados. A primeira área de estudo fica bem protegida dentro do Parque Estadual do Itacolomi. Asegunda área é afetada por agropecuária, fogo, e demais atividades de urbanização. Como a área impactada mostra maior riquez
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2012
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4. Spatial distribution of bryophytes across the Atlantic Forest, southeastern Brazil / Distribuição espacial de briófitas na Floresta Atlântica, Sudeste do Brasil
A fim de compreendermos a influência da altitude sobre as comunidades briófitas, realizamos o estudo da brioflora de seis cinturões altitudinais (10 m, 50 m, 400 m, 800 m, 950 m e 1170 m) no Parque Estadual da Serra do Mar, litoral norte do estado de São Paulo. Nossos objetivos foram descrever e analisar os padrões de distribuição espacial das espéci
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2011
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5. Padrões funcionais de organização de árvores juvenis em manchas florestais na serra do sudeste do Rio Grande do Sul
Uma das mais relevantes perspectivas que buscam explicar como as comunidades ecológicas se organizam é a teoria do nicho, que se divide em duas linhas de pesquisa com filosofias opostas. A primeira enfatiza que diferenças nas características funcionais de organismos permitem sua coexistência, enquanto que a segunda avalia até que ponto membros de uma m
Publicado em: 2011
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6. Heterogeneidade do habitat, riqueza e estrutura da assembléia de besouros rola-bostas (Scarabaeidae: Scarabaeinae) em áreas de cerrado na Chapada dos Parecis, MT
Ecological theory of habitat heterogeneity and limited niche-similarity assumes that more heterogeneous environments provide a greater amount and diversity of resources than simple environments, resulting in a greater diversity of species. This study aimed to evaluate the effect of the habitat heterogeneity on the richness of dung beetles and to examine the
Neotropical Entomology. Publicado em: 2010-12
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7. Estrutura da Comunidade de Lagartos de um remanescente de mata atlântica do Estado do Rio Grande Do Norte, Brasil.
As part of a broader project, Diversity and Distribution Patterns of Floristic and Faunistic composition of remnants of Potiguars Atlantic Forest, as subsidies to conservation, that subsidizes a group of institutional research, This study aimed to evaluate the structure of the assemblage of lizards a remnant of the of the northern Atlantic Forest, identifyin
Publicado em: 2010
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8. Study of the audio coding algorithm of the MPEG-4 AAC standard and comparison among implementations of modules of the algorithm
Audio coding is used to compress digital audio signals, thereby reducing the amount of bits needed to transmit or to store an audio signal. This is useful when network bandwidth or storage capacity is very limited. Audio compression algorithms are based on an encoding and decoding process. In the encoding step, the uncompressed audio signal is transformed in
Publicado em: 2007
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9. Niche tradeoffs, neutrality, and community structure: A stochastic theory of resource competition, invasion, and community assembly
Stochastic niche theory resolves many of the differences between neutral theory and classical tradeoff-based niche theories of resource competition and community structure. In stochastic niche theory, invading species become established only if propagules can survive stochastic mortality while growing to maturity on the resources left unconsumed by establish
National Academy of Sciences.
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10. Matchmaking and species marriage: A game-theory model of community assembly
Theories developed to explain the processes that govern the assembly and composition of natural plant communities can be divided into two broad categories. Niche-based theories propose that coevolutionary changes among species lead to character divergence (displacement), which allows for coexistence by partitioning resources among species. In contrast, ecolo
The National Academy of Sciences.
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11. Neutrality, niches, and dispersal in a temperate forest understory
A fundamental goal of ecology is to understand what controls the distribution and abundance of species. Both environmental niches and trade-offs among species in dispersal and competitive ability have traditionally been cited as determinants of plant community composition. More recently, neutral models have shown that communities of species with identical li
National Academy of Sciences.
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12. Community assembly and invasion: An experimental test of neutral versus niche processes
A species-addition experiment showed that prairie grasslands have a structured, nonneutral assembly process in which resident species inhibit, via resource consumption, the establishment and growth of species with similar resource use patterns and in which the success of invaders decreases as diversity increases. In our experiment, species in each of fou
National Academy of Sciences.