3 years ago

Trends in soil microbial communities during secondary succession

Trends in soil microbial communities during secondary succession
Succession, a central theme throughout the history of ecology, has been well studied predominantly in plant communities, but the general trends in soil microbial communities during succession remain unclear. Here, we compiled a comprehensive data set of 85 age sequences worldwide with the aims to (1) examine the trends in soil microbial composition, bioenergetics, and activity during secondary succession, and (2) explore their coordinating changes with soil properties. The results showed that the fungi to bacteria ratio (fungi:bacteria) increased, while the microbial respiration per unit biomass carbon (R/C mic ) decreased as the succession proceeds. Secondary succession had the rising trends in microbial biomass carbon to soil carbon ratio (C mic /C soil ) and microbial biomass nitrogen to soil nitrogen ratio (N mic /N soil ). These successional trends in microbes were coincident with the macro-ecological succession theory in plants and animals. Specifically, early successional stages tended to be dominated by r-strategists (bacteria) that had higher R/C mic and lower C mic /C soil and N mic /N soil , whereas late successional stages tended to be dominated by K-strategists (fungi) that behaved oppositely. The soil C to N ratio (C:N soil ) increased significantly with the successional stage, with a fast increasing C:N soil ratio being accompanied by a fast increase of fungi:bacteria, a slow decrease of R/C mic , and a slow increase of C mic /C soil . This result suggests that the stoichiometry theory may provide a feasible approach to explain the divergent successional trends in microbial communities. In conclusion, our global synthesis highlights the application of the existing macro-ecological theory to soil microbial ecology studies.

Publisher URL: www.sciencedirect.com/science

DOI: S0038071717305527

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.