Aerobiologia

, 22:259

Transport of microorganisms to Israel during Saharan dust events

  • Pnina Schlesinger
  • Yaacov Mamane
  • Isabella Grishkan
Original Paper

DOI: 10.1007/s10453-006-9038-7

Cite this article as:
Schlesinger, P., Mamane, Y. & Grishkan, I. Aerobiologia (2006) 22: 259. doi:10.1007/s10453-006-9038-7

Abstract

Dust storms are serious meteorological events that affect the East Mediterranean region, primarily during the spring season. The physical and chemical nature of dust storms, their origin, and the meteorological conditions leading to the generation of storms have been fully documented, but knowledge on their biological content is almost nonexistent. Four dust events that occurred in the period 2004–2005 were sampled in Haifa, Israel, an urban area on the East Mediterranean coast, for biological characterization. Samples were taken before or after (depending on the meteorological conditions) as well as during the dust events. Dust particles were collected as two size fractions using a dichotomous sampler, and their elemental content was determined using X-ray fluorescence analyses. Airborne bacteria and fungi were collected with the Six Stage Andersen Viable Impactor. Fungi were identified by optical microscopy. Compared to adjacent clear days, there was an increase in the concentration of both atmospheric particles and elements of geological and marine origin during the dust events. The concentration of airborne microorganisms during the dust events was also higher, and the fungal population content was affected. On a winter clear day the abundant airborne fungi were Paecilomyces variotii, Penicillium glabrum, and Alternaria alternata. On a spring clear day, the persisting airborne fungi were Alternaria alternata, Geotrichum candidum, Penicillium chrysogenum, and P. glabrum. However, during two dust events the fungal population was dominated by Alternaria alternata, Aspergillus fumigatus, A. niger, A. thomii, Cladosporium cladosporioides, Penicillium chrysogenum, and P. griseoroseum. This study suggests that Saharan and other desert dust events in the East Mediterranean have a significant effect on the airborne microbial populations, which might impact on health, agriculture, and ecology.

Keywords

Airborne microorganismsBacteriaDichotomous samplerEastern MediterraneanElemental contentsFungiParticulate matterSaharan dustSix Stage Andersen Viable Impactor

Abbreviations

CFU

Colony forming units

HYSPLIT

Hybrid single-particle Lagrangian integrated trajectory

NOAA

National Oceanic and Atmospheric Administrations

PM10

Particles smaller then 10 μm

SPM

Suspended particulate matter

Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Pnina Schlesinger
    • 1
  • Yaacov Mamane
    • 1
  • Isabella Grishkan
    • 2
  1. 1.Environmental, Water and Agricultural EngineeringTechnion, HaifaIsrael
  2. 2.Institute of EvolutionUniversity of HaifaHaifaIsrael