Unbekannt
Secretariat, Southeast Asian Fisheries Development Center
|
Bangkok, Thailand
In:
http://aquaticcommons.org/id/eprint/26386
|
23782
|
2019-04-05 08:35:51
|
26386
|
Southeast Asian Fisheries Development Center, Secretariat
Publikationsdatum:
2021-07-24
Beschreibung:
Distribution of phytoplankton pigments was investigated in the relation to Chlorophyll a (Chl-a) and light intensity in Vietnamese waters located at longitude 102E - 112W, latitute 23N - 7N. Over 200 samples collected at 58 stations were analyzed for pigments (Chlorophyll a, b, c and carotenoids) and degradation products (Phaeophytill). Chlorophyll a was measured by fluorescence. Results show that average values in the seawater were 0.18 ± 0.04 mg.m-3 for Chl-a; 0.05 ± 0.01 mg.m-3 for Chl-b; 0.062 mg.m-3 for Phaeophytill. Higher value of Chl-a occurred at the thermocline but maxima were found at 75 or 50m depths. Average value of Carotenoids concentration was very low about 0.052 ± 0.12 mg.m-3. The report used a model for the relationship between Chlorophyll a content and light intensity to estimate the primary production. Average value of primary production was about 9.04 mgC.m3.day-1 at the surface and 2.63 mgC.m3.day-1 at the bottom. The relationship between Chlorophyll and some environmental parameters such as temperature, salinity was examined. The effects of thermocline and halocline to the primary production were analyzed.
Schlagwort(e):
Biology
;
Oceanography
;
Chlorophylls
;
Photosynthetic pigments
;
Phytoplankton
;
Primary production
;
Carotenoids
;
Vertical profiles
;
Viet Nam
;
South China Sea
Repository-Name:
AquaDocs
Materialart:
book_section
Format:
application/pdf
Format:
application/pdf
Format:
233-250
Format:
18
Permalink
|
Standort |
Signatur |
Erwartet |
Verfügbarkeit |
