干旱区生态环境知识资源中心(Arid): Diversity and spatial distribution of soil diatoms along a natural altitudinal gradient in the High Atlas (Morocco)

Arid

DOI	10.1080/0269249X.2021.1972045
	Diversity and spatial distribution of soil diatoms along a natural altitudinal gradient in the High Atlas (Morocco)
	Minaoui, Farah; Hakkoum, Zineb; Douma, Mountasser; Mouhri, Khadija; Loudiki, Mohammed
通讯作者	Loudiki, M (corresponding author), Cadi Ayyad Univ, Fac Sci Semlalia Marrakech, Lab Water Biodivers & Climate Change, Phycol Biotechnol & Environm Toxicol Res Unit, Marrakech, Morocco.
来源期刊	DIATOM RESEARCH
ISSN	0269-249X
EISSN	2159-8347
出版年	2021
英文摘要	Microscopic algae especially diatoms (Class Bacillariophyceae) are an important component of biological soil crusts (or biocrust) communities in arid and semi-arid environments. In Morocco, a largely arid and semi-arid African Mediterranean country, the soil diatom diversity and ecology remain unexplored, unlike aquatic diatoms. This study aims to understand the spatial distribution of soil diatoms and to investigate the effects of soil properties and land use on their diversity and taxonomic composition in the region of Marrakesh (Morocco). Five sampling sites with different land use and vegetation cover were selected along a natural altitudinal gradient in the Ourika watershed (from the humid mountain highlands of Oukaimeden at 2634 m (High Atlas) to the arid Haouz plain at 765 m). Biological soil crusts were taken and soil physicochemical characteristics (soil moisture and texture, pH, electrical conductivity, total organic carbon, ammoniacal nitrogen, available phosphorus) were measured at five locations and two seasons (February and May). The spatial distribution of soil diatom communities and associated influencing factors were investigated via statistical analysis using Canonical Correspondence Analysis (CCA). A total of 27 diatom taxa belonging to 16 genera were recorded. The results showed that the distribution of soil diatoms was mainly influenced by altitude, bioclimate, substratum type, land use and vegetation cover. These environmental factors induce spatial variability in the soil physicochemical properties. Diatom composition and species richness were correlated with soil moisture, pH, texture, conductivity, nutrient and organic matter content. Diatoms showed higher species richness in siliceous soils of high altitudinal humid grassland dominated by acidophilous and neutral taxa with a preference for low conductivity. In contrast diatom communities of forests and sedimentary lowland arid steppe were relatively species poor, dominated by typically alkaliphilous and halophilous soil species. This exploratory survey provides a first account of the diatom assemblages of biological soil crusts over an altitudinal range in Morocco, necessary for understanding their structure and ecological function, including improving soil condition and sustainable fertility management.
英文关键词	soil-diatoms taxonomy ecology soil properties land use vegetation type
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000711256000001
WOS关键词	LA POSSESSION CROZET ; EXPERIMENTAL DESICCATION ; CRYPTOGAMIC CRUSTS ; BENTHIC DIATOMS ; FRESH-WATER ; ALGAE ; ASSEMBLAGES ; COMMUNITIES ; ILE ; BIODIVERSITY
WOS类目	Marine & Freshwater Biology
WOS研究方向	Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367622
作者单位	[Minaoui, Farah; Hakkoum, Zineb; Mouhri, Khadija; Loudiki, Mohammed] Cadi Ayyad Univ, Fac Sci Semlalia Marrakech, Lab Water Biodivers & Climate Change, Phycol Biotechnol & Environm Toxicol Res Unit, Marrakech, Morocco; [Douma, Mountasser] Sultan Moulay Slimane Univ, Polydisciplinary Fac Khouribga PFK, Beni Mellal, Morocco
推荐引用方式 GB/T 7714	Minaoui, Farah,Hakkoum, Zineb,Douma, Mountasser,et al. Diversity and spatial distribution of soil diatoms along a natural altitudinal gradient in the High Atlas (Morocco)[J],2021.
APA	Minaoui, Farah,Hakkoum, Zineb,Douma, Mountasser,Mouhri, Khadija,&Loudiki, Mohammed.(2021).Diversity and spatial distribution of soil diatoms along a natural altitudinal gradient in the High Atlas (Morocco).DIATOM RESEARCH.
MLA	Minaoui, Farah,et al."Diversity and spatial distribution of soil diatoms along a natural altitudinal gradient in the High Atlas (Morocco)".DIATOM RESEARCH (2021).