当前位置: X-MOL 学术Oceanol. Hydrobiol. Stud. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Plant replacement trend in soft-water lakes with isoetids
Oceanological and Hydrobiological Studies ( IF 0.9 ) Pub Date : 2020-06-25 , DOI: 10.1515/ohs-2020-0015
Rafał P. Ronowski 1 , Krzysztof Banaś 1 , Marek Merdalski 1 , Józef Szmeja 1
Affiliation  

Abstract A number of small, shallow inland lakes in the Northern Hemisphere are acidic, soft-water water bodies, mostly fed by precipitation. Some of these lakes are home to Lobelia dortmanna and other aquatic macrophytes from the isoetid group. The present study identifies a plant species replacement trend along the main environmental gradient in such lakes, i.e. pH of water. In 70 lakes covered by the study and ordered along the gradient of increasing alkalinity, bryophytes gradually decline. Their decreasing frequency is 86.8% (pH 4.0), 32.5% (pH 6.5) and <10% (pH 6.6–9.5). At the same time, the frequency of vascular plants increases from 13.2% in strongly acidic lakes up to 92.8% in alkaline ones. The majority of isoetids usually occur at pH 5.5–6.7, but one of them (Littorella uniflora) often (frequency 40.5%) occurs also in eutrophic, alkaline lakes (pH 9.0–9.5), where it forms large populations. In lakes ranked according to the decreasing alkalinity gradient, bryophyte populations have been found to be smaller, while vascular plants become more abundant. The decreasing water acidity leads to partial or total elimination of bryophytes, which are replaced by eutrophilic vascular plants, frequently accompanied by some stonewort species.

中文翻译:

具有isoetids的软水湖植物更替趋势

摘要 北半球的一些小而浅的内陆湖泊是酸性软水水体,主要靠降水补给。其中一些湖泊是 Lobelia dortmanna 和来自 isoetid 组的其他水生大型植物的家园。本研究确定了沿此类湖泊主要环境梯度(即水的 pH 值)的植物物种更替趋势。在研究覆盖的70个湖泊中,苔藓植物呈逐渐减少的趋势,并沿碱度增加的梯度排列。它们的下降频率为 86.8% (pH 4.0)、32.5% (pH 6.5) 和 <10% (pH 6.6–9.5)。同时,维管植物的频率从强酸性湖泊中的 13.2% 增加到碱性湖泊中的 92.8%。大多数isoetids通常发生在pH 5.5-6.7,但其中之一(Littorella uniflora)经常(频率40.5%)也发生在富营养化,碱性湖泊(pH 9.0-9.5),在那里形成大量种群。在根据碱度递减排列的湖泊中,发现苔藓植物种群较少,而维管植物则更为丰富。水酸度降低导致苔藓植物部分或全部消失,取而代之的是富营养性维管植物,通常伴随着一些石苔属植物。
更新日期:2020-06-25
down
wechat
bug