Crop diversity enriches arbuscular mycorrhizal fungal communities in an intensive agricultural landscape

Aidee Guzman; Marisol Montes; Leslie Hutchins; Gisel DeLaCerda; Paula Yang; Anne Kakouridis; Ruth M. Dahlquist‐Willard; Mary K. Firestone; Timothy M. Bowles; Claire Kremen

doi:10.1111/nph.17306

journal article Open Access Apr 02, 2021

Crop diversity enriches arbuscular mycorrhizal fungal communities in an intensive agricultural landscape

Aidee Guzman

Marisol Montes Leslie Hutchins Gisel DeLaCerda Paula Yang Anne Kakouridis

Ruth M. Dahlquist‐Willard Mary K. Firestone

Timothy M. Bowles

Claire Kremen

New Phytologist Vol. 231 No. 1 pp. 447-459 · Wiley

View at Publisher Save 10.1111/nph.17306

Abstract

Summary

Arbuscular mycorrhizal fungi (AMF) are keystone symbionts of agricultural soils but agricultural intensification has negatively impacted AMF communities. Increasing crop diversity could ameliorate some of these impacts by positively affecting AMF. However, the underlying relationship between plant diversity and AMF community composition has not been fully resolved.

We examined how greater crop diversity affected AMF across farms in an intensive agricultural landscape, defined by high nutrient input, low crop diversity and high tillage frequency. We assessed AMF communities across 31 field sites that were either monocultures or polycultures (growing > 20 different crop types) in three ways: richness, diversity and composition. We also determined root colonization across these sites.

We found that polycultures drive the available AMF community into richer and more diverse communities while soil properties structure AMF community composition. AMF root colonization did not vary by farm management (monocultures vs polycultures), but did vary by crop host.

We demonstrate that crop diversity enriches AMF communities, counteracting the negative effects of agricultural intensification on AMF, providing the potential to increase agroecosystem functioning and sustainability.

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Details

Published: Apr 02, 2021
Vol/Issue: 231(1)
Pages: 447-459
License: View

Authors

A

Aidee Guzman