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Database information

MaarjAM (The online database MaarjAM reveals global and ecosystemic distribution patterns)

General information

Description: MaarjAM is a web-based database containing Glomeromycota DNA sequence data that originate from ecological studies based on “environmental samples” or taxonomic investigations based on cultured fungi.
Year founded: 2007
Last update: 2017
Real time : Checking...
Country/Region: Estonia
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Contact information

University/Institution: University of Tartu
Country/Region: Estonia
Contact name (PI/Team): M. Öpik
Contact email (PI/Helpdesk):

Record metadata

Created on: 2018-01-29
Curated by:
Fatima Batool [2018-12-27]
zhang yang [2018-02-23]


All databases:
348/4549 (92.372%)
Phylogeny and homology:
17/190 (91.579%)
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The online database MaarjAM reveals global and ecosystemic distribution patterns in arbuscular mycorrhizal fungi (Glomeromycota). [PMID: 20561207]
Opik M, Vanatoa A, Vanatoa E, Moora M, Davison J, Kalwij JM, Reier U, Zobel M.

• Here, we describe a new database, MaarjAM, that summarizes publicly available Glomeromycota DNA sequence data and associated metadata. The goal of the database is to facilitate the description of distribution and richness patterns in this group of fungi. • Small subunit (SSU) rRNA gene sequences and available metadata were collated from all suitable taxonomic and ecological publications. These data have been made accessible in an open-access database ( • Two hundred and eighty-two SSU rRNA gene virtual taxa (VT) were described based on a comprehensive phylogenetic analysis of all collated Glomeromycota sequences. Two-thirds of VT showed limited distribution ranges, occurring in single current or historic continents or climatic zones. Those VT that associated with a taxonomically wide range of host plants also tended to have a wide geographical distribution, and vice versa. No relationships were detected between VT richness and latitude, elevation or vascular plant richness. • The collated Glomeromycota molecular diversity data suggest limited distribution ranges in most Glomeromycota taxa and a positive relationship between the width of a taxon's geographical range and its host taxonomic range. Inconsistencies between molecular and traditional taxonomy of Glomeromycota, and shortage of data from major continents and ecosystems, are highlighted.

New Phytol. 2010:188(1) | 205 Citations (from Europe PMC, 2020-07-04)