Quantifying environmental stress-induced emissions of algal isoprene and monoterpenes using laboratory measurements

摘要: Abstract. We report here production rates of isoprene and monoterpene compounds (α-pinene, β-pinene, camphene d-limonene) from six phytoplankton monocultures as a function irradiance temperature. Irradiance experiments were carried out for diatom strains (Thalassiosira weissflogii Thalassiosira pseudonana), prymnesiophyte (Pleurochrysis carterae), dinoflagellate (Karenia brevis Prorocentrum minimum), cryptophyte (Rhodomonas salina), while temperature pseudonana). Phytoplankton species, incubated in climate-controlled room, subject to variable light (90 900 μmol m−2 s−1) (18 30 °C) regimes. Compared isoprene, emissions an order magnitude lower at all levels. Emission are normalized by cell count Chlorophyll (Chl a) content. Diatom the largest emitters, with ~ 2 × 10−17 g(cell)−1h−1 (~ 35 μg (g Chl a)−1 h−1) 5 10−19 g (cell)−1 h−1 1 a)−1) α-pinene. The contribution total was 70% α-pinene, 20% d-limonene, 250 irradiance. Measurements revealed different patterns time-averaged over two successive days. On first day, most species showed distinct increase within 4 h while, on second emission overall higher, but less variable. data suggest that enhanced amounts monoterpenes emitted result perturbations environmental conditions cause imbalance chloroplasts force primary producers acclimate physiologically. This relationship could be valuable tool development dynamic ecosystem modeling approaches global marine based physiological responses changing environment.