Colonization of bacteria and diatoms on an artificial substrate in a marine lake (eastern Adriatic Sea, NE Mediterranean)

IF 1.1 4区 生物学 Q3 PLANT SCIENCES
A. Car, D. Hafner, S. Ljubimir, I. D. Radić, Svjetlana Bobanović-Ćolić, N. Jasprica
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引用次数: 7

Abstract

The initial colonization of bacteria and diatoms on a immersed artificial substrate and the development of diatom assemblages in relation to physico-chemical parameters were investigated on a weekly basis at one station in the marine Lake Mrtvo More, South Croatia, from April to October 2016. According to TRIX trophic index, lake showed different trophic character: (i) oligotrophic (at the beginning and the end of the study), (ii) mesotrophic (the end of June to mid-July), (iii) eutrophic (the end of July to mid-September). Heterotrophic bacteria increased to peak abundances (69,268 cells cm–2) at the beginning of June when the diatoms abundances start to increase. The lake has high diatom species richness (285 diatom taxa within 72 genera), with the highest species diversity index in August. Among diatoms, adnate were the primary colonizers, particularly Cocconeis dirupta W.Gregory var. flexella (Janisch and Rabenhorst) Grunow and Cocconeis scutellum Ehrenberg var. scutellum, while motile taxa joined the fouling communities from July to September. This study showed close relationship between diatom species composition and changes of physico-chemical parameters, particularly the nutrient concentrations.
细菌和硅藻在海洋湖泊(亚得里亚海东部,地中海东北部)人工基质上的定殖
2016年4月至10月,在克罗地亚南部Mrtvo More海洋湖的一个站点,每周调查一次浸入式人工基质上细菌和硅藻的初始定植以及硅藻组合的发展与理化参数的关系。根据TRIX营养指数,湖泊呈现出不同的营养特征:(i)贫营养(研究开始和结束时),(ii)中营养(6月底至7月中旬),(iii)富营养(7月底至9月中旬)。6月初,硅藻丰度开始增加,异养细菌丰度达到峰值(69268个细胞cm-2)。该湖硅藻物种丰富度较高,共有72属285个硅藻类群,物种多样性指数在8月份最高。在硅藻中,adate是主要的侵染者,特别是Cocconeis dirupta W.Gregory var. flexella (Janisch and Rabenhorst) Grunow和Cocconeis scutellum Ehrenberg var. scutellum,而活动类则在7 - 9月加入污染群落。研究表明,硅藻的种类组成与理化参数的变化,特别是营养物浓度的变化密切相关。
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来源期刊
Acta Botanica Croatica
Acta Botanica Croatica PLANT SCIENCES-
CiteScore
2.50
自引率
0.00%
发文量
34
审稿时长
>12 weeks
期刊介绍: The interest of the journal is field (terrestrial and aquatic) and experimental botany (including microorganisms, plant viruses, bacteria, unicellular algae), from subcellular level to ecosystems. The attention of the Journal is aimed to the research of karstic areas of the southern Europe, karstic waters and the Adriatic Sea (Mediterranean).
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