巴西大西洋森林特有的濒临灭绝的阔叶树蕨(阔叶树科)的种群结构

IF 0.4 4区生物学 Q4 Agricultural and Biological Sciences

Iheringia Serie Botanica Pub Date : 2017-12-31 DOI:10.21826/2446-8231201772312

M. M. Silva, R. Farias, L. Costa, I. C. Barros

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引用次数: 2

摘要

他的研究旨在确定巴西东北部大西洋森林碎片中Cyathea praecincta (Kunze) Domin的种群结构。在1800m2的室内森林面积内，记录到预松的个体数。测量茎高是为了将标本分为长度类，并将这一变量与个体的育性联系起来。样本共98株，种群密度较低(每100 m-2 5.4株)。空间分布呈聚类分布(Ia = 2.12;p = 0.0002)，长度类分布呈指数型或倒j型分布。在长度较小(0 ~ 0.25 m)的种群中有大量的个体，这可能表明所研究的种群正在扩大。这支持了保护研究区域和减少干扰造成的局部灭绝风险的必要性。

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Population structure of the endangered tree fern Cyathea praecincta ( Cyatheaceae ), endemic of the Brazilian Atlantic Forest

his study aimed to determine the population structure of Cyathea praecincta (Kunze) Domin in an Atlantic Forest fragment in Northeastern Brazil. Individuals of C. praecincta were recorded inside 1800 m2 of interior forest area. Caudex height was measured in order to classify specimens into length classes and relate this variable with fertility of individuals. Ninety-eight individuals were sampled, featuring a low population density (5.4 individuals per 100 m-2) when compared to other tree fern populations. The spatial distribution was clustered (Ia = 2.12; p = 0.0002) and the length class distribution followed an exponential or reverse J-shaped pattern. The high number of individuals classifi ed in the smaller length class (0 to 0.25 m) may be an indication that the studied population is under expansion. This endorses the need for conservation of the study area and for reducing the risk of local extinction by disturbances.

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来源期刊

Iheringia Serie Botanica PLANT SCIENCES-

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

>12 weeks

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)