Organic Nutrients Support High Primary Production in the Bay of Bengal

2019 ◽  
Vol 46 (12) ◽  
pp. 6706-6715 ◽  
Author(s):  
V. V. S. S. Sarma ◽  
D. N. Rao ◽  
G. R. Rajula ◽  
H. B. Dalabehera ◽  
K. Yadav
Keyword(s):  
Primary Production ◽  
Bay Of Bengal ◽  
High Primary Production ◽  
Organic Nutrients

The carbon pump supports high primary production in a shallow lake

2019 ◽  
Vol 81 (2) ◽  
Author(s):  
Mikkel René Andersen ◽  
Theis Kragh ◽  
Kenneth Thorø Martinsen ◽  
Emil Kristensen ◽  
Kaj Sand-Jensen
Keyword(s):  
Primary Production ◽  
Shallow Lake ◽  
High Primary Production ◽  
Carbon Pump

scholarly journals High Primary Production Contrasts with Intense Carbon Emission in a Eutrophic Tropical Reservoir

2016 ◽  
Vol 7 ◽  
Author(s):  
Rafael M. Almeida ◽  
Gabriel N. Nóbrega ◽  
Pedro C. Junger ◽  
Aline V. Figueiredo ◽  
Anízio S. Andrade ◽  
...  
Keyword(s):  
Primary Production ◽  
Carbon Emission ◽  
Tropical Reservoir ◽  
High Primary Production

A comparison study on primary production in typical low-latitude seas (South China Sea and Bay of Bengal)

2012 ◽  
Vol 32 (18) ◽  
pp. 5900-5906 ◽  
Author(s):  
刘华雪 LIU Huaxue ◽  
宋星宇 SONG Xingyu ◽  
黄洪辉 HUANG Honghui ◽  
谭烨辉 TAN Yehui ◽  
黄良民 HUANG Liangmin
Keyword(s):  
South China Sea ◽  
Primary Production ◽  
South China ◽  
Bay Of Bengal ◽  
Comparison Study ◽  
Low Latitude ◽  
China Sea

Low Dinitrogen Fixation Rates in the Bay of Bengal during Summer Monsoon

2020 ◽  
Author(s):  
Arvind Singh ◽  
Himanshu Saxena ◽  
Deepika Sahoo ◽  
Mohammad Atif Khan ◽  
Sanjeev Kumar ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Primary Production ◽  
Summer Monsoon ◽  
Bay Of Bengal ◽  
Arabian Sea ◽  
Living Organism ◽  
New Production ◽  
Dna And Rna ◽  
Incubation Experiments ◽  
Cellular Components

<p>Nitrogen is a staple element for every living organism in addition to carbon, since all the major cellular components (e.g., DNA and RNA), proteins, and energy carrier molecules (e.g., ATP) are stemmed from these elements. Biological dinitrogen (N<sub>2</sub>) fixation exerts an important control on oceanic primary production by providing bioavailable form of nitrogen (such as NH<sub>4</sub><sup>+</sup>) to photosynthetic microorganisms. We hypothesized that the oligotrophic nature of the Bay of Bengal might create a suitable niche for N<sub>2</sub> fixing microorganisms.</p><p>In the Bay of Bengal, fresh water influx driven stratification prevent the vertical influx of nutrients to the sunlit layers. Most of the riverine nutrients are used within estuarine and coastal regions, and thus these have negligible contribution on open ocean biological productivity. Atmospheric deposition contribution to the nutrients supply is equally low (< 3%) in the Bay. Thus, the recently observed high new production rates in the Bay of Bengal suggests the higher probability of N<sub>2</sub> fixation in this basin than the Arabian Sea. In addition, nitrogen isotopic composition of sedimentary organic matter (low δ<sup>15</sup>N values) in the Bay of Bengal can also be alluded to the presence of diazotrophy in the Bay. Hence, we further strengthened our hypothesis that N<sub>2</sub> fixers play a crucial role for the primary production in the Bay.</p><p>We commenced the first N<sub>2</sub> fixation study in the sunlit layer of the Bay of Bengal using <sup>15</sup>N<sub>2</sub> gas tracer incubation experiments on a cruise expedition during summer monsoon 2018. N<sub>2</sub> fixation rates varied from 4 to 124 μmol N m<sup>-2</sup> d<sup>-1 </sup>– these rates were very low compared to that observed in the Bay’s western counterpart in the Indian Ocean, i.e., the Arabian Sea. The contribution of N<sub>2</sub> fixation to primary production was small (< 1%). Noteworthily, the upper bound of observed N<sub>2</sub> fixation rates in our study was still higher than that measured in other oceanic regimes such as Eastern Tropical South Pacific, Tropical Northwest Atlantic, and Equatorial and Southern Indian Ocean. Strong monsoonal winds, turbidity due to copious riverine discharge and cloud cover over the Bay of Bengal might have inhibited N<sub>2</sub> fixation. Therefore, a more detailed study covering all the seasons is needed to understand the role of N<sub>2</sub> fixation rates on primary productivity in the Bay of Bengal.</p>

scholarly journals RACIÓN DIARIA Y CONSUMO DE ALIMENTO DE LA POBLACIÓN DE ANCHOVIA CLUPEOIDES (PISCES: ENGRAULIDAE) EN LA CIÉNAGA GRANDE DE SANTA MARTA, CARIBE COLOMBIANO

2016 ◽  
Vol 35 ◽  
Author(s):  
Guillermo Duque ◽  
Arturo Acero P.
Keyword(s):  
Body Weight ◽  
Primary Production ◽  
Coastal Lagoon ◽  
Trophic Levels ◽  
Daily Ration ◽  
Tropical Estuaries ◽  
High Productivity ◽  
High Primary Production

In tropical estuaries, most fishes feed at different hours during the day. To determine the daily ration and consumption of the Ciénaga Grande de Santa Marta (CGSM) population of Anchovia clupeoides monthly samplings of a 24 h cycle were taken at the coastal lagoon between October 1995 and June 1996. A total of 4389 specimens were examined. The population of A. clupeoides consumes almost twice its weight per year, representing a 0.53% of its body weight per day. Though the CGSM presents a high primary production (990 gC/m2/year), the percentage that is transferred to the population of A. clupeoides is relatively low (0.055%). Hence, it seems that the high productivity of the CGSM is not being transferred to upper trophic levels due to the kind of fitoplankton, mainly cianobacteria.

A consistent high primary production and chlorophyll-a maximum in a narrow strait — Effects of hydraulic control

2008 ◽  
Vol 74 (1-2) ◽  
pp. 395-405 ◽  
Author(s):  
Lars Chresten Lund-Hansen ◽  
Morten Holtegaard Nielsen ◽  
Annette Bruhn ◽  
Christian Christiansen ◽  
Torben Vang ◽  
...  
Keyword(s):  
Primary Production ◽  
Chlorophyll A ◽  
Hydraulic Control ◽  
High Primary Production

Role of eddies on controlling total and size-fractionated primary production in the Bay of Bengal

2020 ◽  
Vol 204 ◽  
pp. 104186 ◽  
Author(s):  
V.V.S.S. Sarma ◽  
M. Chopra ◽  
D.N. Rao ◽  
M.M.R. Priya ◽  
G.R. Rajula ◽  
...  
Keyword(s):  
Primary Production ◽  
Bay Of Bengal
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