首页> 外文期刊>Acta oecologica >Postfire regeneration in Cytisus oromediterraneus: sources of variation and morphology of the below-ground parts
【24h】

Postfire regeneration in Cytisus oromediterraneus: sources of variation and morphology of the below-ground parts

机译:蛇足亚目的火后再生:地下部分的变化和形态来源

获取原文
获取原文并翻译 | 示例
       

摘要

Postfire regeneration in Cytisus oromediterraneus, a Mediterranean-basin mountain matorral species, shows a wide range of possibilities and variations in sexual and asexual regeneration. Its interpretation requires basic information on the below-ground structure of parent plants as well as on the origin and development of seedlings and various ramet (sprout clump) types: rootstock, basal-branch, and lateral-root ramets. Morphology and emergence of such ramets in C. oromediterraneus is similar to that in related species but with some specific features described here in detail. In order to determine if characteristics of 1-year-old populations depended on the age of the burned parent plants, two populations were investigated: (A 7-year-old, and B 14-year-old). In the most frequent populations in our study area, i.e. those from parent populations of ca. 7 years (A): a-plant density and biomass were highly variable and positively correlated; b-frequency distribution differed significantly from normal distribution for plant weight, but not for other parameters such as diameters, perimeter, and height, in which it did, however, show asymmetry; c-perimeter was the best parameter for estimating individuals' weight; d-there was a higher number of seedlings than ramets but their biomass was smaller; e-the size of seedlings and ramets showed wide variation. In comparison with population A (7-year-old) population B (14-year-old) showed: significantly higher density, slightly lower biomass, higher number of small individuals, mainly seedlings, and less vigorous resprouting. In general, 1 year after fire, Cytisus oromeditarraneus population density mainly depends on the germination response, while the above-ground biomass mainly depends on the vegetative response and the intensity of both of them is conditioned by parent plant age. (C) 2004 Elsevier SAS. All rights reserved.
机译:地中海盆地山地物种Cytisus oromediterraneus的火后再生显示出性和无性再生的可能性和变异性很大。它的解释要求提供有关亲本植物地下结构以及幼苗和各种分株(新芽丛)类型(砧木,基枝和侧根分株)的起源和发育的基本信息。这种分株的形态和出现与C. oromediterraneus相似,但具有一些特定的特征,在此进行了详细介绍。为了确定1岁种群的特征是否取决于燃烧的亲本植物的年龄,研究了两个种群:(A 7岁,B 14岁)。在我们研究区域中最常见的人群中,即来自大约ca的父母人群的人群。 7年(A):a-植物的密度和生物量高度可变并呈正相关; b频率分布与植物重量的正态分布有显着差异,但对于其他参数(例如直径,周长和高度)却没有显着差异,但是在其中确实表现出不对称性。 c围是估计个人体重的最佳参数; d-幼苗比分株高,但生物量较小; e-幼苗和分株的大小显示出很大的差异。与种群A(7岁)相比,种群B(14岁)显示:密度显着提高,生物量略低,小个体(主要是幼苗)的数量增加,重生较少。通常,火后1年,Cytisus oromeditarraneus种群密度主要取决于发芽反应,而地上生物量主要取决于营养反应,两者的强度均取决于亲本植物的年龄。 (C)2004 Elsevier SAS。版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号