Organic amendment increases arbuscular mycorrhizal fungal diversity in primary coastal dunes

Authors

  • Andrew Willis
  • Tim H. Sparks
  • Bernard Felinov Rodrigues
  • Phillip John Charles Harris

DOI:

https://doi.org/10.1515/eje-2016-0011

Keywords:

Glomeromycota spores, Interrupted-belt transcect, Ischaemum Indicum, Simpson's diversity, Vermicompost amendment, West coast india

Abstract

Plastic pots were inserted beneath seedlings of a shallow-rooted C4 grass species, Ischaemum indicum, with and without a root-impenetrable nylon sachet filled with organic matter (OM) amendment, at seven stations along an interrupted belt transect in which plant community and soil chemistry had been previously surveyed. The transect was perpendicular to mean high-water mark (MH-WM) across a primary coastal dune system in Goa, India, where summer monsoon is the predominant weather feature. The Quadrat survey of plant frequency was made in stations when the above-ground biomass was estimated to be highest. Arbuscular mycorrhiza fungal (AMF) spore density and diversity were determined morphologically in amended and control pots soils, and in OM sachet residues, after host-plant desiccation when monsoon rains had ceased. Twenty-seven AM fungal spore morphotypes were isolated from the pots containing OM amended rhizosphere soils, 19 from controls and 14 from OM residues in the sachets. Gigaspora margarita proved to be the dominant spore in all treatments. Eight morphotypes recovered from amended pots were not recovered from the controls. There was an increasing trend in species diversity in amended pots away from MH-WM. Spore recovery from the three regimes showed variable distribution that indicated differing AMF species strategies.

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2016-12-01

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Willis, A., Sparks, T. H., Rodrigues, B. F., & Harris, P. J. C. (2016). Organic amendment increases arbuscular mycorrhizal fungal diversity in primary coastal dunes. European Journal of Ecology, 2(2), 1-8. https://doi.org/10.1515/eje-2016-0011