Publication details.

Paper

Year:2017
Author(s):F. Iuculano, C. Duarte, N. Marbà, S. Agustí
Title:Seagrass as major source of transparent exopolymer particles in the oligotrophic Mediterranean coast
Journal:Biogeosciences
ISSN:1726-4170
JCR Impact Factor:3.441
Volume:14
Issue No.:22
Pages:5069-5075
D.O.I.:10.5194/bg-14-5069-2017
Web:https://dx.doi.org/10.5194/bg-14-5069-2017
Abstract:The role of seagrass, Posidonia oceanica, meadows as a source of transparent exopolymer particles (TEPs) to Mediterranean coastal waters was tested by comparing the TEP dynamics in two adjacent coastal waters in the oligotrophic NW Mediterranean Sea, one characterized by oligotrophic open-sea waters and the other accumulating seagrass leaf litter, together with an experimental examination of TEP release by seagrass litter. TEP concentrations ranged from 4.6 to 90.6 μg XG (xanthan gum) Eq L-1, with mean (±SE) values of 38.7 (± 2.02) μg XG Eq L-1 in the site devoid of seagrass litter, whereas the coastal beach site accumulating leaf litter had > 10-fold mean TEP concentrations of 487.02 (± 72.8) μg XG Eq L-1. Experimental evaluation confirmed high rates of TEP production by P. oceanica litter, allowing calculations of the associated TEP yield. We demonstrated that P. oceanica is an important source of TEPs to the Mediterranean Sea, contributing an estimated 76 Gg C as TEPs annually. TEP release by P. oceanica seagrass explains the elevated TEP concentration relative to the low chlorophyll a concentration in the Mediterranean Sea.

Related staff

  • Nuria Marbà Bordalba
  • Related departments

  • Oceanography and Global Change
  • Related research groups

  • Global Change Research