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1.
Ecology ; 104(1): e3852, 2023 01.
Article in English | MEDLINE | ID: mdl-36053857

ABSTRACT

Advancing functional ecology depends fundamentally on the availability of data on reproductive traits, including those from tropical plants, which have been historically underrepresented in global trait databases. Although some valuable databases have been created recently, they are mainly restricted to temperate areas and vegetative traits such as leaf and wood traits. Here, we present Rock n' Seeds, a database of seed functional traits and germination experiments from Brazilian rock outcrop vegetation, recognized as outstanding centers of diversity and endemism. Data were compiled through a systematic literature search, resulting in 103 publications from which seed functional traits were extracted. The database includes information on 16 functional traits for 383 taxa from 148 genera, 50 families, and 25 orders. These 16 traits include two dispersal, six production, four morphological, two biophysical, and two germination traits-the major axes of the seed ecological spectrum. The database also provides raw data for 48 germination experiments, for a total of 10,187 records for 281 taxa. Germination experiments in the database assessed the effect of a wide range of abiotic and biotic factors on germination and different dormancy-breaking treatments. Notably, 8255 of these records include daily germination counts. This input will facilitate synthesizing germination data and using this database for a myriad of ecological questions. Given the variety of seed traits and the extensive germination information made available by this database, we expect it to be a valuable resource advancing comparative functional ecology and guiding seed-based restoration and biodiversity conservation in tropical megadiverse ecosystems. There are no copyright restrictions on the data; please cite this paper when using the current data in publications; also the authors would appreciate notification of how the data are used in publications.


O avanço da ecologia funcional depende fundamentalmente da disponibilidade de dados sobre traços reprodutivos, incluindo dados de plantas tropicais, que têm sido historicamente subrepresentados em bancos de dados de traços funcionais globais. Embora alguns bancos de dados valiosos tenham sido criados recentemente, eles são restritos principalmente a áreas temperadas e a traços vegetativos, como traços de folhas e madeira. Neste artigo apresentamos Rock n' Seeds, um banco de dados de traços funcionais de sementes e experimentos de germinação de vegetações associadas a afloramentos rochosos do Brasil, os quais são reconhecidos como centros notáveis de diversidade e endemismo. Os dados foram compilados através de uma revisão sistemática na literatura, resultando em 103 publicações das quais foram extraídos os traços funcionais das sementes. O banco de dados inclui informações de 16 traços funcionais para 383 taxa de 148 gêneros, 50 famílias e 25 ordens. Estes dezesseis traços incluem dois traços de dispersão, seis de produção, quatro morfológicos, dois biofísicos e dois germinativos; os eixos principais do espectro ecológico da semente. O banco de dados também fornece os dados brutos para 48 experimentos de germinação para um total de 10.187 registros para 281 taxa. Os experimentos de germinação no banco de dados avaliaram o efeito de uma ampla gama de fatores abióticos e bióticos sobre a germinação e diferentes tratamentos de quebra de dormência. Particularmente, 8.255 desses registros incluem a contagem diária da germinação. Estas informações facilitarão a síntese de dados de germinação e a utilização deste banco de dados para uma grande variedade de questões ecológicas. Dada a variedade de traços das sementes e as amplas informações sobre germinação disponibilizadas por este banco de dados, esperamos que ele seja um recurso valioso para o avanço da ecologia funcional comparativa e para orientar a restauração baseada em sementes e a conservação da biodiversidade em ecossistemas tropicais megadiversos. Não há restrições de direitos autorais sobre os dados; favor citar este artigo ao utilizar os dados nas publicações e os autores agradeceriam uma notificação de como os dados são utilizados nas publicações.


El avance de la ecología funcional depende fundamentalmente de la disponibilidad de datos sobre rasgos reproductivos-incluyendo los de las plantas tropicales-los cuales han estado poco representados en las bases de datos globales de rasgos. Aunque recientemente se han creado algunas bases de datos valiosas, estas se encuentran restringidas principalmente a las zonas templadas y a los rasgos vegetativos, como los de las hojas y la madera. En este artículo presentamos Rock n' Seeds, una base de datos de rasgos funcionales de semillas y experimentos de germinación de la vegetación asociada a afloramientos rocosos de Brasil, los cuales son destacados centros de diversidad y endemismo. Los datos se recopilaron mediante una búsqueda bibliográfica sistemática, que dio como resultado 103 publicaciones de las que se extrajeron los rasgos funcionales de las semillas. La base de datos incluye información de dieciséis rasgos funcionales para 383 taxones de 148 géneros, 50 familias y 25 órdenes. Estos rasgos incluyen dos rasgos de dispersión, seis de producción, cuatro morfológicos, dos biofísicos y dos de germinación; siendo estos los principales ejes del espectro ecológico de las semillas. La base de datos también proporciona los datos brutos de 48 experimentos de germinación, para un total de 10.187 registros de 281 taxones. Dichos experimentos de germinación evaluaron el efecto de una amplia gama de factores abióticos y bióticos sobre la germinación y de diferentes tratamientos para romper la dormancia. En particular, 8.255 de estos registros cuentan con conteos diarios de germinación. Esto facilitará la síntesis de los datos de germinación y el uso de esta base de datos para una gran diversidad de preguntas ecológicas. Dada la variedad de rasgos de las semillas y la amplia información sobre germinación que ofrece esta base de datos, esperamos que sea un recurso valioso para el avance de la ecología funcional comparativa y para orientar la restauración basada en semillas y la conservación de la biodiversidad en ecosistemas tropicales megadiversos. No hay restricciones de derechos de autor sobre los datos; se solicita citar este documento cuando se utilicen los datos en publicaciones y los autores agradecerán ser notificados sobre cómo se utilizan los datos en las publicaciones.


Subject(s)
Ecosystem , Germination , Humans , Brazil , Seeds , Plants
2.
Rev. bras. estud. popul ; 39: e0226, 2022. tab
Article in Portuguese | LILACS | ID: biblio-1423239

ABSTRACT

Resumo Este artigo busca analisar diferenças nas condições de vida e saúde das professoras principais provedoras do domicílio em comparação às coprovedoras, durante a pandemia de Covid-19. Trata-se de estudo transversal realizado em 2020, por meio de formulário on-line enviado aos professores da rede estadual de Minas Gerais. A variável dependente foi ser ou não a principal provedora da família (principal provedora vs. coprovedora) e as independentes foram agrupadas em sociodemográficas, ocupacionais, situação de saúde e comportamentos. Analisaram-se dados somente das mulheres e estimou-se a regressão logística. Entre as 12.817 professoras participantes, 47,2% declararam-se principais provedoras. Dentre elas, observou-se predomínio de mulheres mais velhas, que viviam sem companheiro(a), com filhos(as) e, no geral, apresentavam características que retrataram pior condição socioeconômica, maior acúmulo de trabalho e comportamentos menos saudáveis. Os resultados permitiram identificar desvantagens nas condições de vida e saúde das professoras principais provedoras financeiras de suas famílias em comparação às coprovedoras.


Abstract The objective was to analyze differences in living and health conditions of teachers who are the main providers for their household compared to co-providers during the COVID-19 pandemic. The cross-sectional study was carried out in 2020, through an online form sent to teachers of public schools in the state of Minas Gerais, Brazil. The dependent variable was whether or not they were their family's main provider (main provider vs. co-provider) and independent variables were grouped into sociodemographic, occupational, health status and behaviors. Only women's data were analyzed and logistic regression was estimated. Among the 12,817 participating female schoolteachers, 47.2% declared to be the main providers. In this subgroup, there was a predominance of older women, who lived without a partner, with children and, in general, these teachers presented worse socioeconomic conditions, greater accumulation of work and less healthy behaviors. The results of the present study allow to identify disadvantages in living and health conditions of female schoolteachers who are the main financial providers of their families compared to co-providers.


Resumen El objetivo fue analizar las diferencias en las condiciones de vida y salud entre las profesoras que son las principales proveedoras del hogar y las coproveedoras, durante la pandemia de COVID-19. Estudio transversal realizado en 2020, a través de un formulario en línea enviado a profesoras de escuelas públicas del estado de Minas Gerais, Brasil. La variable dependiente fue ser o no la proveedora principal de la familia (proveedora principal versus coproveedora) y las variables independientes se agruparon en sociodemográficas, ocupacionales, sanitarias y conductuales. Solo se analizaron los datos de las mujeres y se estimó una regresión logística. Entre las 12.817 maestras participantes, el 47,2 % se declaró proveedora principal. En este subgrupo predominaron las mujeres mayores, que vivían sin pareja, con hijos y, en general, estas profesoras tenían características que retrataban una peor condición socioeconómica, mayor acumulación de trabajo y conductas menos saludables. Los resultados del presente estudio permiten identificar desventajas en las condiciones de vida y salud de las profesoras de escuela que son las principales proveedoras económicas de sus familias en comparación con las coproveedoras.


Subject(s)
Humans , Quality of Life , Health , Education, Primary and Secondary , Faculty , COVID-19 , Women
3.
Ann Bot ; 127(2): 213-222, 2021 01 07.
Article in English | MEDLINE | ID: mdl-32914162

ABSTRACT

BACKGROUND AND AIMS: Plant individuals within a population differ in their phenology and interactions with pollinators. However, it is still unknown how individual differences affect the reproductive success of plants that have functionally specialized pollination systems. Here, we evaluated whether plant individual specialization in phenology (temporal specialization) and in pollination (pollinator specialization) affect the reproductive success of the crepuscular-bee-pollinated plant Trembleya laniflora (Melastomataceae). METHODS: We quantified flowering activity (amplitude, duration and overlap), plant-pollinator interactions (number of flowers visited by pollinators) and reproductive success (fruit set) of T. laniflora individuals from three distinct locations in rupestrian grasslands of southeastern Brazil. We estimated the degree of individual temporal specialization in flowering phenology and of individual specialization in plant-pollinator interactions, and tested their relationship with plant reproductive success. KEY RESULTS: Trembleya laniflora presented overlapping flowering, a temporal generalization and specialized pollinator interactions. Flowering overlap among individuals and populations was higher than expected by chance but did not affect the individual interactions with pollinators and nor their reproductive success. In contrast, higher individual generalization in the interactions with pollinators was related to higher individual reproductive success. CONCLUSIONS: Our findings suggest that individual generalization in plant-pollinator interaction reduces the potential costs of specialization at the species level, ensuring reproductive success. Altogether, our results highlight the complexity of specialization/generalization of plant-pollinator interactions at distinct levels of organization, from individuals to populations, to species.


Subject(s)
Flowers , Pollination , Animals , Bees , Brazil , Plants , Reproduction
4.
Am J Bot ; 102(9): 1453-61, 2015 Sep.
Article in English | MEDLINE | ID: mdl-26391709

ABSTRACT

PREMISE OF THE STUDY: Most bird-dispersed fruits are green when unripe and become colored and conspicuous when ripe, signaling that fruits are ready to be consumed and dispersed. The color pattern for fruits of Miconia albicans (Melastomataceae), however, is the opposite, with reddish unripe and green ripe fruits. We (1) verified the maintenance over time of its bicolored display, (2) tested the communicative function of unripe fruits, (3) tested the photoprotective role of anthocyanins in unripe fruits, and (4) verified whether green ripe fruits can assimilate carbon. METHODS: Using a paired experiment, we tested whether detection of ripe fruits was higher on infructescences with unripe and ripe fruits compared with infructescences with only ripe fruits. We also measured and compared gas exchange, chlorophyll a fluorescence, and heat dissipation of covered (to prevent anthocyanin synthesis) and uncovered ripe and unripe fruits. KEY RESULTS: Although the bicolored display was maintained over time, unripe fruits had no influence on bird detection and removal of ripe fruits. Ripe and unripe fruits did not assimilate CO2, but they respired instead. CONCLUSIONS: Since the communicative function of unripe fruits was not confirmed, seed dispersers are unlikely to select the display with bicolored fruits. Because of the absence of photosynthetic activity in ripe and unripe fruits and enhanced photoprotective mechanisms in ripe fruits rather than in unripe fruits, we could not confirm the photoprotective role of anthocyanins in unripe fruits. As an alternative hypothesis, we suggest that the bicolored fruit display could be an adaptation to diversify seed dispersal vectors instead of restricting dispersal to birds and that anthocyanins in unripe fruits may have a defense role against pathogens.


Subject(s)
Melastomataceae/physiology , Pigmentation , Seed Dispersal , Animals , Birds/physiology , Brazil , Color , Fruit/growth & development , Fruit/physiology , Herbivory , Melastomataceae/growth & development
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