Soil microbial composition varies in response to coffee agroecosystem management

Area of Science:

• Agroecology
• Microbiology
• Soil Science

Background:

• Soil microbes are crucial for sustainable agriculture.
• The impact of management practices on soil microbial communities in coffee plantations is not well understood.
• Previous studies show links between soil microbes, nutrients, and coffee yield.

Purpose of the Study:

• To investigate how farm management influences soil fungal and bacterial communities in Nicaraguan coffee plantations.
• To understand the relationship between soil chemistry, canopy composition, and the soil microbiome.
• To assess the effects of stand age and previous land use on soil microbial composition.

Main Methods:

• Surveyed soil fungal and bacterial communities, soil chemistry, and canopy composition across 19 farms in Nicaragua.
• Utilized amplicon sequencing for microbial community analysis.
• Analyzed the influence of management (organic/conventional), stand age, and previous land use.

Main Results:

• Management practices, stand age, and previous land use significantly affected soil microbial communities.
• Bacterial communities correlated strongly with soil chemistry.
• Fungal communities were more associated with canopy composition and historical land use.
• Both fungal and bacterial richness decreased as stand age increased.

Conclusions:

• Farm management and land-use history are key drivers of soil microbiome composition in coffee agroecosystems.
• Fungal and bacterial communities respond differently to environmental factors and management legacies.
• Stand age negatively impacts soil microbial diversity, highlighting potential long-term effects of agricultural practices.