C, N, P, S content of the Chlorophyta Chaetomorpha linum (Müller) Kützing in a vast high density mat of a Mediterranean non-tidal lagoon

IF 1.6 3区环境科学与生态学 Q3 FISHERIES

Knowledge and Management of Aquatic Ecosystems Pub Date : 2020-01-01 DOI:10.1051/kmae/2020030

M. Lenzi, M. Leporatti-Persiano, P. Gennaro

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引用次数: 6

Abstract

In a Chaetomorpha linum high density mat extending over 300 hectares, between 2017 and 2019 samples were collected for C, N, P, S tissue content determination, biomass (b) was estimated, sediment samples collected for labile organic matter (LOM) determination, and water chemical-physical variables measured. The latter showed extreme conditions with a wide range of values and with zero oxygen for long periods. N-NO3:SRP atomic ratio showed extreme P-limitation. Tissue macronutrients showed very variable values, highlighting a strong P-limitation and relatively high level of S. With exception of nitrogen, no significant differences were detected for each macronutrient between the months and between the stations, neither was any correlation found between macronutrients and LOM and b data-set. The growth and survival of the mat occurred despite the scarcity of P, which probably reached with very low frequency the surface layer of the mat, the one capable of performing photosynthesis, where it was quickly re-assimilated and utilised.

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地中海非潮汐泻湖巨大高密度垫中毛藻(chetomorpha linum (m ller) ktzing)的C, N, P, S含量

在面积超过300公顷的毛毛藻(Chaetomorpha linum)高密度垫中，于2017年至2019年收集样品用于测定C、N、P、S组织含量，估算生物量(b)，收集沉积物样品用于测定活性有机质(LOM)，并测量水的化学物理变量。后者表现出具有宽范围值和长时间零氧的极端条件。N-NO3:SRP原子比表现出极强的p限制。组织宏量营养素的数值变化非常大，突出了强磷限制和相对较高的s水平。除氮外，各宏量营养素在月份和站点之间没有显著差异，宏量营养素与LOM和b数据集之间也没有任何相关性。尽管磷缺乏，但草席的生长和存活仍然发生，磷可能以极低的频率到达草席的表层，即能够进行光合作用的表层，在那里它被迅速重新同化和利用。

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来源期刊

Knowledge and Management of Aquatic Ecosystems 环境科学-海洋与淡水生物学

CiteScore

3.70

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： Knowledge and Management of Aquatic Ecosystems (KMAE-Bulletin Français de la Pêche et de la Pisciculture since 1928) serves as a foundation for scientific advice across the broad spectrum of management and conservation issues related to freshwater ecosystems. The journal publishes articles, short communications, reviews, comments and replies that contribute to a scientific understanding of freshwater ecosystems and the impact of human activities upon these systems. Its scope includes economic, social, and public administration studies, in so far as they are directly concerned with the management of freshwater ecosystems (e.g. European Water Framework Directive, USA Clean Water Act, Canadian Water Quality Guidelines, …) and prove of general interest to freshwater specialists. Papers on insular freshwater ecosystems and on transitional waters are welcome. KMAE is not a preferred journal for taxonomical, physiological, biological, toxicological studies, unless a clear link to ecological aspects can be established. Articles with a very descriptive content can be accepted if they are part of a broader ecological context.