论爱沙尼亚的毛蕨立地型森林

Q4 Agricultural and Biological Sciences
J. Paal, Iti Jürjendal
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引用次数: 0

摘要

蕨类丰富的森林群落呈现在爱沙尼亚mesic或中度湿润的营养丰富的栖息地,在排水沼泽林的地区,在洪泛区和北爱沙尼亚石灰岩悬崖(klint)的talus斜坡的较低部分。在最近的官方森林类型学中,蕨类植物只区分和标记了一种站点类型:北方-热带森林范围内的森林站点类型。当前研究的目的是:(1)澄清区分两种富含蕨类植物的森林立地类型是否合理,一种是在完全排水的森林群中,另一种是在北方-热带森林群中,如果是合理的,那么(2)两种被认为的森林立地类型的主要特征是什么,(3)决定这些群落结构的主要环境因素是什么,(iv)这些森林与其他富含蕨类植物的森林群落之间的相互关系是什么。我们的研究结果表明,以前学者们所区分的完全排水和不排水的鳞毛蕨立地类型存在明显的差异。在同一地点,不排水的北纬-nemoral蕨类丰富的林分与生境条件和谐发展,而排水的森林发生了显著变化。尽管由于长期的排水后演替而有些模糊,但仍有理由将爱沙尼亚森林类型学中富含蕨类植物的排水林分视为代表完全排水森林组中的自主森林场址类型。为避免命名上的混淆,今后可根据最显著的指示种将不排水的富蕨类北纬针叶林立地类型命名为Athyrium (filix-femina)立地类型,将全排水泥炭土上的富蕨类立地类型命名为Dryopteris (expansa)立地类型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On Dryopteris site type forests in Estonia
Abstract Fern-rich forest communities are presented in Estonia in mesic or moderately humid nutrient-rich habitats, in areas of drained mire forests, on floodplains and lower parts of talus slopes of the North-Estonian limestone escarpment (klint). In the recent official forest typology only one site type has been distinguished and labelled by the ferns: the Dryopteris site type in the scope of boreo-nemoral forests. The aims of the current study were (i) to clarify whether distinguishing between two fern-rich forest site types, one among the full-drained forests group and another in the boreo-nemoral forests group, is reasonable, and if so, then (ii) what the main characteristics of both considered forest site types are, (iii) what the main environmental factors determining the structure of these communities are, and (iv) what the mutual relationship between those forests and other fern-rich forest communities is. Our results asserted a distinct difference between the full-drained and undrained Dryopteris site type forests distinguished by the former scholars. The undrained boreo-nemoral fern-rich stands have developed in the same place in harmony with habitat conditions, while drained forests have significantly changed. It seems that despite some vagueness due to long-lasting post-drainage succession, it is nevertheless justified to recognise the fern-rich drained stands in Estonian forest typology as representing an autonomous forest site type in the group of full-drained forests. To avoid confusion in nomenclature, in the future, the undrained fern-rich boreo-nemoral forests site type could be named according to the most conspicuous indicator species as the Athyrium (filix-femina) site type and fern-rich stands on full-drained peat soils as the Dryopteris (expansa) site type.
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来源期刊
Forestry Studies
Forestry Studies Agricultural and Biological Sciences-Forestry
CiteScore
0.70
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