{"title":"植物密度对巴西东南部露头岩中多年生草本植物生活史性状的影响","authors":"G. R. Demetrio, M. E. A. Barbosa, F. F. Coelho","doi":"10.21826/2446-82312020v75e2020014","DOIUrl":null,"url":null,"abstract":"Rocky outcrops support a great diversity of edaphic conditions and associated vegetation mosaics greatly determined by factors like local topography and micro-environment. The vegetation is grouped, and clonal plants may form patches with different densities. Densitydependent responses are an important component of organism’s life-histories. We evaluated the density effects on Vellozia albiflora traits. We settled 20 monospecific patches of V. albiflora with different densities and sampled vegetative and reproductive traits. We compared traits between plants experimenting densely crowded and uncrowded conditions. V. albiflora rosettes present larger sizes and higher production of sexual reproductive structures in high densities. We concluded that V. albiflora probably allocates more resources to sexual reproduction in response to high-density conditions, which may allow a higher survival of offspring, since seeds are able to endure in soil and germinate under better density conditions, whereas the propagules generated by asexual reproduction must establish right after their production.","PeriodicalId":54998,"journal":{"name":"Iheringia Serie Botanica","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Plant density influence on life history traits of a perennial herb in rocky outcrops, southeastern Brazil\",\"authors\":\"G. R. Demetrio, M. E. A. Barbosa, F. F. Coelho\",\"doi\":\"10.21826/2446-82312020v75e2020014\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Rocky outcrops support a great diversity of edaphic conditions and associated vegetation mosaics greatly determined by factors like local topography and micro-environment. The vegetation is grouped, and clonal plants may form patches with different densities. Densitydependent responses are an important component of organism’s life-histories. We evaluated the density effects on Vellozia albiflora traits. We settled 20 monospecific patches of V. albiflora with different densities and sampled vegetative and reproductive traits. We compared traits between plants experimenting densely crowded and uncrowded conditions. V. albiflora rosettes present larger sizes and higher production of sexual reproductive structures in high densities. We concluded that V. albiflora probably allocates more resources to sexual reproduction in response to high-density conditions, which may allow a higher survival of offspring, since seeds are able to endure in soil and germinate under better density conditions, whereas the propagules generated by asexual reproduction must establish right after their production.\",\"PeriodicalId\":54998,\"journal\":{\"name\":\"Iheringia Serie Botanica\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.4000,\"publicationDate\":\"2020-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iheringia Serie Botanica\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.21826/2446-82312020v75e2020014\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Agricultural and Biological Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iheringia Serie Botanica","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.21826/2446-82312020v75e2020014","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
Plant density influence on life history traits of a perennial herb in rocky outcrops, southeastern Brazil
Rocky outcrops support a great diversity of edaphic conditions and associated vegetation mosaics greatly determined by factors like local topography and micro-environment. The vegetation is grouped, and clonal plants may form patches with different densities. Densitydependent responses are an important component of organism’s life-histories. We evaluated the density effects on Vellozia albiflora traits. We settled 20 monospecific patches of V. albiflora with different densities and sampled vegetative and reproductive traits. We compared traits between plants experimenting densely crowded and uncrowded conditions. V. albiflora rosettes present larger sizes and higher production of sexual reproductive structures in high densities. We concluded that V. albiflora probably allocates more resources to sexual reproduction in response to high-density conditions, which may allow a higher survival of offspring, since seeds are able to endure in soil and germinate under better density conditions, whereas the propagules generated by asexual reproduction must establish right after their production.
期刊介绍:
The Iheringia, Série Botânica is a publication edited by the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, since 1958. The name Iheringia is actually a tribute to Hermann von Ihering (a German researcher who became a Brazilian citizen) and his important studies in the Natural Sciences.The journal has the mission of publishing articles, reviews and original scientific notes that cover diverse areas in Botany, and may be written in Portuguese, Spanish and English.
The journal is widely available in both international and national scientific community. The issues are published and distributed twice a year to 118 national institutions and 152 international institutions. The distribution is either free of charge or by exchange.
Impac Factor JCR 2014/2015 = 0.263
Qualis CAPES 2015: B 4 (Biodiversity) B1 (Agricultural Science I) B1 (Environment)