User profiles for Jonathan P. Zehr

Jonathan P. Zehr

University of California, Santa Cruz
Verified email at ucsc.edu
Cited by 25520

Trichodesmium, a Globally Significant Marine Cyanobacterium

DG Capone, JP Zehr, HW Paerl, B Bergman… - Science, 1997 - science.org
Planktonic marine cyanobacteria of the genusTrichodesmium occur throughout the oligotrophic
tropical and subtropical oceans. Their unusual adaptations, from the molecular to the …

Nitrogenase gene diversity and microbial community structure: a cross‐system comparison

JP Zehr, BD Jenkins, SM Short… - Environmental …, 2003 - Wiley Online Library
Biological nitrogen fixation is an important source of fixed nitrogen for the biosphere.
Microorganisms catalyse biological nitrogen fixation with the enzyme nitrogenase, which has been …

Unicellular cyanobacteria fix N2 in the subtropical North Pacific Ocean

JP Zehr, JB Waterbury, PJ Turner, JP Montoya… - Nature, 2001 - nature.com
Fixed nitrogen (N) often limits the growth of organisms in terrestrial and aquatic biomes 1 , 2
, and N availability has been important in controlling the CO 2 balance of modern and …

Nitrogen cycling in the ocean: new perspectives on processes and paradigms

JP Zehr, BB Ward - Applied and environmental microbiology, 2002 - Am Soc Microbiol
The nitrogen (N) cycle is composed of multiple transformations of nitrogenous compounds,
catalyzed primarily by microbes. The N cycle controls the availability of nitrogenous nutrients …

High rates of N2 fixation by unicellular diazotrophs in the oligotrophic Pacific Ocean

JP Montoya, CM Holl, JP Zehr, A Hansen, TA Villareal… - Nature, 2004 - nature.com
The availability of nitrogen is important in regulating biological productivity in marine
environments. Deepwater nitrate has long been considered the major source of new nitrogen …

Use of degenerate oligonucleotides for amplification of the nifH gene from the marine cyanobacterium Trichodesmium thiebautii

JP Zehr, LA McREYNOLDS - Applied and environmental …, 1989 - Am Soc Microbiol
Trichodesmium spp. are marine filamentous, nonheterocystous, nitrogen-fixing cyanobacteria
which are an important component of marine ecosystems. This organism has never been …

New Nitrogen-Fixing Microorganisms Detected in Oligotrophic Oceans by Amplification of Nitrogenase (nifH) Genes

JP Zehr, MT Mellon, S Zani - Applied and environmental …, 1998 - Am Soc Microbiol
Oligotrophic oceanic waters of the central ocean gyres typically have extremely low dissolved
fixed inorganic nitrogen concentrations, but few nitrogen-fixing microorganisms from the …

Unicellular Cyanobacterial Distributions Broaden the Oceanic N2 Fixation Domain

…, KS Johnson, CA Carlson, JP Montoya, JP Zehr - Science, 2010 - science.org
Nitrogen (N 2 )–fixing microorganisms (diazotrophs) are an important source of biologically
available fixed N in terrestrial and aquatic ecosystems and control the productivity of …

Unicellular cyanobacterium symbiotic with a single-celled eukaryotic alga

…, BJ Carter, N Musat, D Vaulot, MMM Kuypers, JP Zehr - Science, 2012 - science.org
Symbioses between nitrogen (N) 2 –fixing prokaryotes and photosynthetic eukaryotes are
important for nitrogen acquisition in N-limited environments. Recently, a widely distributed …

Nitrogen fixation by marine cyanobacteria

JP Zehr - Trends in microbiology, 2011 - cell.com
Discrepancies between estimates of oceanic N 2 fixation and nitrogen (N) losses through
denitrification have focused research on identifying N 2 -fixing cyanobacteria and quantifying …