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Table 4 Comparison of literature values for DOC exudation by seagrasses expressed as rates and as a percentage of gross primary production (GPP)

From: Influence of light, temperature and salinity on dissolved organic carbon exudation rates in Zostera marinaL.

Seagrass Exudation rates (mg C gdw-1 h-1) Leaves (%) Rhizome/Root (%) Source
Thalassia testudinum 0.035 – 0.125    [26]a
   1 15-30 [55]
    ~1 [14]
  0.019 ± 0.003b 1.3   [13]
T. hemprichii    5.4 [20]
Halodule wrightii   1 6-17 [21]
  0.022 ± 0.008b    [13]
Posidonia oceanica 0.022 1.9   [25]
  0.007 - 0.02    [19]c
Cymodocea rotundata    7 [20]
Cymodocea nodosa 0.057    [17]
Zostera marina   2   [15]
   0.2 2.2 [14]
  0.015 ± 0.006b    [59]
  0.032 -0.069 0.6 -4.2   leaf
  0.024 – 0.045   0.6 – 2.4 rhizome
  1. a DOC flux from [26], above ground biomass ~100 gdw m-2 from [49].
  2. b mean ± SD.
  3. c values based on conversion of annualized (4360 mmols C m-2 y-1) and June (34.7 mmols C m-2 d-1) fluxes.