Results 41 to 50 of about 2,736 (167)

Why we age

Biological Reviews, EarlyView.
ABSTRACT Three categories of explanations exist for why we age: mechanistic theories, which omit reference to evolutionary forces; weakening force of selection theories, which posit that barriers exist that prevent evolutionary forces from optimising fitness in ageing; and optimisation theories, which posit that evolutionary forces actually select for ...
Michael S. Ringel
wiley   +1 more source

Emergence and maintenance of biodiversity in an evolutionary food-web model [PDF]

, 2010
Ecological communities emerge as a consequence of gradual evolution, speciation, and immigration. In this study, we explore how these processes and the structure of the evolved food webs are affected by species-level properties.
Brännström, Å., Dieckmann, U., Loeuille, N., Loreau, M.   +3 more
core   +1 more source

TURISMO GASTRONÔMICO: UMA PESQUISA BIBLIOMÉTRICA EM BASES DE DADOS NACIONAIS E INTERNACIONAIS

Turismo: Visão e Ação, 2017
Esta pesquisa objetiva realizar um levantamento bibliométrico sobre o construto turismo gastronômico em bases de dados nacionais e internacionais. Foram analisados 45 artigos identificados nas bases de dados periódicos CAPES, Spell, Proquest, Ebsco ...
Clarissa de Souza Ribeiro-Martin, Elvis Silveira-Martins   +1 more
doaj   +1 more source

MicrobTiSDA: A flexible R package for inferring interspecies interactions and abundance dynamics in microbiome time‐series data

iMetaOmics, EarlyView.
MicrobTiSDA is a user‐friendly and flexible R package specifically designed for longitudinal microbiome data analysis. By integrating process‐oriented functional modules—including data input, data preprocessing, interspecies interaction inference, natural spline regression modeling, temporal pattern clustering, and random forest classification ...
Shijia Li, Remco Kort, Tim G. J. de Meij, Stanley Brul, Meike T. Wortel, Johan A. Westerhuis   +5 more
wiley   +1 more source

Distilling food web dynamics: top–down and bottom–up drivers of extinction and trophic cascades

Oikos, EarlyView.
Quantifying population dynamics is a fundamental challenge in ecology and evolutionary biology, particularly for species that are cryptic, microscopic, or extinct. Traditional approaches rely on continuous representations of population size, but in many cases, the precise number of individuals is unknowable.
Justin D. Yeakel
wiley   +1 more source

ESTUDO BIBLIOMÉTRICO DA PRODUÇÃO CIENTÍFICA SOBRE O SISTEMA NACIONAL DE AVALIAÇÃO DA EDUCAÇÃO SUPERIOR [PDF]

, 2017
O objetivo do estudo é analisar o perfil da produção científica sobre avaliação de Instituições de Ensino Superior no Brasil, a partir do SINAES. Quanto aos procedimentos metodológicos, caracteriza-se como descritivo e com abordagem quantitativa.
Cordazzo, Evanilde Gollo, Mazzioni, Sady, Poli, Odilon Luiz, Zanin, Antonio   +3 more
core  

Seasonal variations in planktonic food web structure affect stability by shifting the distribution of energy fluxes

Oikos, EarlyView.
Seasonality in temperate ecosystems shapes species phenology, influencing interactions and food web structure. Variations in species richness and biomass affect trophic interaction strength, a crucial factor for community stability, which can be assessed through energy fluxes – an essential indicator of ecosystem function.
Simon Bazin, Isabelle Domaizon, Cécilia Barouillet, Victor Frossard, Arnaud Sentis   +4 more
wiley   +1 more source

Crossing the hurdle: the determinants of individual scientific performance [PDF]

, 2013
An original cross sectional dataset referring to a medium sized Italian university is implemented in order to analyze the determinants of scientific research production at individual level.
Baccini, Alberto, Barabesi, Lucio, Cioni, Martina, Pisani, Caterina   +3 more
core   +2 more sources

Friends or foes? Polyploidy and competition in a grassland geophyte

Oikos, EarlyView.
Previous studies have suggested polyploids may possess a competitive advantage over diploids, due to their larger size, increased vigour or ability to better respond to abiotic stress. However, few studies have tested the effect of polyploidy on competitive ability directly, and only relatively recently has this oversight begun to be addressed. Here we
Damian Vaz de Sousa, Michelle Greve, Nicolette J. Taylor, Kenneth C. Oberlander   +3 more
wiley   +1 more source

Lei de Zipf em discursos orais : uma comparação entre trabalhos acadêmicos escritos e suas apresentações [PDF]

, 2014
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências da Educação. Curso de Biblioteconomia.A lei de Zipf é uma teoria com base na matemática e linguística que analisa e quantifica como as palavras são distribuídas dentro de um ...
Cassettari, Rafael
core