The rise and fall of arbuscular mycorrhizal fungal diversity during ecosystem retrogression

Molecular Ecology
Manuela KrügerMichael Bunce

Abstract

Ecosystem retrogression following long-term pedogenesis is attributed to phosphorus (P) limitation of primary productivity. Arbuscular mycorrhizal fungi (AMF) enhance P acquisition for most terrestrial plants, but it has been suggested that this strategy becomes less effective in strongly weathered soils with extremely low P availability. Using next generation sequencing of the large subunit ribosomal RNA gene in roots and soil, we compared the composition and diversity of AMF communities in three contrasting stages of a retrogressive >2-million-year dune chronosequence in a global biodiversity hotspot. This chronosequence shows a ~60-fold decline in total soil P concentration, with the oldest stage representing some of the most severely P-impoverished soils found in any terrestrial ecosystem. The richness of AMF operational taxonomic units was low on young (1000's of years), moderately P-rich soils, greatest on relatively old (~120 000 years) low-P soils, and low again on the oldest (>2 000 000 years) soils that were lowest in P availability. A similar decline in AMF phylogenetic diversity on the oldest soils occurred, despite invariant host plant diversity and only small declines in host cover along the chronosequence. Differ...Continue Reading

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Citations

Sep 7, 2016·Frontiers in Plant Science·Louisa Robinson BoyerXiangming Xu
Nov 8, 2016·The Science of the Total Environment·Facundo Rivera-BecerrilFabrice Martin-Laurent
Jul 10, 2017·The Science of the Total Environment·Adam T Cross, Hans Lambers
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Jan 9, 2021·Environmental Science and Pollution Research International·Nan GuoAnna Krzyszowska Waitkus
Mar 13, 2021·Journal of Integrative Plant Biology·Dong Liu

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