Latitude and chlorophyll a density drive the distribution of carbohydrate-active enzymes in the planktonic microbial fraction of the epipelagic zone

Michael Doane, John Matthew Haggerty, Cleanto Rodrigo da Silva Lopes, Peter Yates, Rob Edwards, Elizabeth Dinsdale, Fabyano Alvares Cardoso Lopes, Thiago Bruce

Research output: Contribution to journalArticle

Abstract

Microbes drive the majority of the global carbon cycle. The effect of environmental conditions on selecting microbial functional diversity is well established, and recent studies have revealed the effects of geographic distances on selecting the functional components of marine microbial communities. Our study is the first attempt at establishing the effects of environmental factors on driving the marine carbohydrate-active enzyme (CAZyme) distribution. We characterized the diversity of CAZyme genes and investigated the correlations between their distributions and biogeographic parameters (latitude, longitude, distance from the equator, site depth, water depth, chlorophyll density, salinity and temperature). Therefore, we accessed a subset of surface water samples (38 metagenomes) from the Global Ocean Sampling project. Only chlorophyll and latitude altered the distribution patterns of CAZymes, revealing the existence of two latitudinal gradients (positive and negative) of marine CAZyme abundance. Considering the importance of carbohydrates in microbial life, characterization of the spatial patterns of the genetic repertoire involved in carbohydrate metabolism represents an important step in improving our understanding of the metabolic strategies associated with the microbial marine carbon cycle and their effects on the productivity of marine ecosystems.

Original languageEnglish
Pages (from-to)473-485
Number of pages13
JournalEnvironmental Microbiology Reports
Volume12
Issue number5
Early online date30 Jun 2020
DOIs
Publication statusPublished - 1 Oct 2020
Externally publishedYes

Keywords

  • CAZyme
  • carbohydrate‐active enzyme
  • biogeographic
  • planktonic microbial fraction
  • epipelagic zone
  • chlorophyll
  • Latitude
  • marine ecosystems

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