Spatial and temporal variations of macroalgal vegetation in the north-western Red Sea

IF 1.6 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Botanica Marina Pub Date : 2022-10-31 DOI:10.1515/bot-2022-0046

Sarah H. Rashedy, Samia M. El-Mahdy, Islam M. El-Manawy, L. Pereira

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引用次数: 1

Abstract

Abstract Macroalgae play a vital role in marine ecosystems, but human effects are threatening the composition and structure of algal communities. In the present investigation, the spatial and temporal variations of species composition, functional groups and percentage macroalgal cover were studied in relation to seasonal fluctuations of some physicochemical parameters, to determine the ecological status of macroalgae in coastal waters along the coast of the northwestern part of the Red Sea, from November 2020 to October 2021. Fifty-five species of macroalgae were collected and identified from the sites studied. Five functional groups of macroalgae were recognized. Among these were two turf-forming species, 34 species of upright fleshy algae, and three crustose algae. There was a large variation in the cover, as well as in the species richness and assemblage structure of the macroalgae in different sites and seasons. Seasonal changes, determined by environmental conditions, led to small changes in macroalgal cover at different sites, with the growth of some brown macroalgae suppressed by high sea temperatures, whereas some green and red macroalgae, increased in response to increasing temperature and salinity.

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红海西北部大藻植被的时空变化

摘要大型藻类在海洋生态系统中发挥着至关重要的作用，但人类活动正威胁着藻类群落的组成和结构。本研究通过研究2020年11月至2021年10月红海西北部沿海水域大型藻类物种组成、功能群和覆盖百分比的时空变化与部分理化参数的季节波动的关系，确定了红海西北部沿海水域大型藻类的生态状况。在研究地点收集和鉴定了55种大型藻类。鉴定了大型藻类的5个官能团。其中，草皮形成藻2种，直立肉质藻34种，甲壳藻3种。在不同地点和季节，大型藻类的覆盖、物种丰富度和组合结构都有很大的变化。由环境条件决定的季节变化导致不同站点的大藻覆盖变化较小，高海水温度抑制了一些棕色大藻的生长，而一些绿色和红色大藻则响应温度和盐度的升高而增加。

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来源期刊

Botanica Marina 生物-海洋与淡水生物学

CiteScore

4.10

自引率

4.50%

发文量

期刊介绍： Botanica Marina publishes high-quality contributions from all of the disciplines of marine botany at all levels of biological organisation from subcellular to ecosystem: chemistry and applications, genomics, physiology and ecology, phylogeny and biogeography. Research involving global or interdisciplinary interest is especially welcome. Applied science papers are appreciated, particularly when they illustrate the application of emerging conceptual issues or promote developing technologies. The journal invites state-of-the art reviews dealing with recent developments in marine botany.