Institution
National Institute of Oceanography, India
Facility•Panjim, Goa, India•
About: National Institute of Oceanography, India is a facility organization based out in Panjim, Goa, India. It is known for research contribution in the topics: Monsoon & Population. The organization has 4713 authors who have published 6927 publications receiving 174272 citations.
Topics: Monsoon, Population, Bay, Phytoplankton, Continental shelf
Papers published on a yearly basis
Papers
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TL;DR: The studied species were rich in carotenoids, phenolic compounds, DPPH free radicals and minerals, therefore, they can be used as potential source of health food in human diets and may be of use to food industry.
53 citations
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TL;DR: In this paper, the authors provide a conceptual framework for assessing the human impacts on Asian river C fluxes, along with an update on anthropogenic alterations of riverine carbon fluxes.
Abstract: . Human activities are drastically altering water and material flows in river
systems across Asia. These anthropogenic perturbations have rarely been
linked to the carbon (C) fluxes of Asian rivers that may account for up to
40–50 % of the global fluxes. This review aims to provide a conceptual
framework for assessing the human impacts on Asian river C fluxes, along with
an update on anthropogenic alterations of riverine C fluxes. Drawing on case
studies conducted in three selected rivers (the Ganges, Mekong, and Yellow
River) and other major Asian rivers, the review focuses on the impacts of
river impoundment and pollution on CO2 outgassing from the rivers
draining South, Southeast, and East Asian regions that account for the
largest fraction of river discharge and C exports from Asia and Oceania. A
critical examination of major conceptual models of riverine processes against
observed trends suggests that to better understand altered metabolisms and C
fluxes in “anthropogenic land-water-scapes”, or riverine landscapes modified by human activities, the
traditional view of the river continuum should be complemented with concepts
addressing spatial and temporal discontinuities created by human activities,
such as river impoundment and pollution. Recent booms in dam construction on
many large Asian rivers pose a host of environmental problems, including
increased retention of sediment and associated C. A small number of studies
that measured greenhouse gas (GHG) emissions in dammed Asian rivers have
reported contrasting impoundment effects: decreased GHG emissions from
eutrophic reservoirs with enhanced primary production vs. increased emissions
from the flooded vegetation and soils in the early years following dam
construction or from the impounded reaches and downstream estuaries during
the monsoon period. These contrasting results suggest that the rates of
metabolic processes in the impounded and downstream reaches can vary greatly
longitudinally over time as a combined result of diel shifts in the balance
between autotrophy and heterotrophy, seasonal fluctuations between dry and
monsoon periods, and a long-term change from a leaky post-construction phase
to a gradual C sink. The rapid pace of urbanization across southern and
eastern Asian regions has dramatically increased municipal water withdrawal,
generating annually 120 km 3 of wastewater in 24 countries, which
comprises 39 % of the global municipal wastewater production. Although
municipal wastewater constitutes only 1 % of the renewable surface water,
it can disproportionately affect the receiving river water, particularly
downstream of rapidly expanding metropolitan areas, resulting in
eutrophication, increases in the amount and lability of organic C, and pulse
emissions of CO2 and other GHGs.
In rivers draining highly populated metropolitan areas, lower reaches and
tributaries, which are often
plagued by frequent algal blooms and pulsatile CO2 emissions from
urban tributaries delivering high loads of wastewater, tended to exhibit higher
levels of organic C and the partial pressure of CO2
( p CO2 ) than less impacted upstream reaches and eutrophic
impounded reaches. More field
measurements of p CO2 , together with accurate flux calculations
based on river-specific model parameters, are required to provide more
accurate estimates of GHG emissions from the Asian rivers that are now
underrepresented in the global C budgets. The new conceptual framework
incorporating discontinuities created by impoundment and pollution into the
river continuum needs to be tested with more field measurements of riverine
metabolisms and CO2 dynamics across variously affected reaches to
better constrain altered fluxes of organic C and CO2 resulting from
changes in the balance between autotrophy and heterotrophy in increasingly
human-modified river systems across Asia and other continents.
53 citations
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TL;DR: In this paper, the authors examined the role of the ocean in the genesis of the core of the warm pool in the southeastern Arabian Sea (SEAS) and the subsequent collapse of the pool.
Abstract: The earlier hypothesis, stated in the ARMEX (Arabian Sea Monsoon Experiment) Science Plan, that the ocean plays an important, but passive, role in the genesis of the core of warm pool in the southeastern Arabian Sea (SEAS) is examined in the light of new data collected during Phase II of ARMEX. The new evidence confirms that the ocean plays an important role. This paper summarises the results based on these data, which show that the remotely forced ocean dynamics plays an active, not passive, role not only in the genesis of the core of the warm pool in the SEAS, but also triggers the collapse of the warm pool.
53 citations
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TL;DR: The distribution and abundance of subtidal meiofauna in Mandovi estuary of Goa were studied from June 1983 to June 1984 and seasonality was greatly influenced by the south-west monsoon and the fauna quickly repopulated after the monsoon.
Abstract: The distribution and abundance of subtidal meiofauna in Mandovi estuary of Goa were studied from June 1983 to June 1984. Monthly faunal abundance ranged from 491 to 2791/10 cm2 and dry weight biomass from 0.16 to 2.80 mg 10 cm2. Free living nematodes were the dominant group contributing over 75% of the total density and 30 to 42% of the total biomass. Among nematodes the deposit feeders were more abundant in fine muddy substratum while epigrowth feeders dominated in sandy substratum. Harpacticoids were next, comprising 6.9 to 8.7% of the total meiofauna number, followed by turbellaria (3.8–4.5%), polychaeta (2.8–3.2%) and ostracods (1.6–4.5%) The contribution of other groups to faunal density was 4.5–6.2%. In the biomass the ostracods contributed most (29.8–54.7%), followed by nematodes (23.8–34.6%). Over 60% of the fauna occurred in the top 2 cm of the sediment and the faunal density reduced significantly with increasing depth in the sediment. The vertical distribution of meiofauna was positively correlated to the vertical distribution of Eh, chlorophyll a and interstitial water. Seasonality was greatly influenced by the south-west monsoon and the fauna quickly repopulated after the monsoon. Salinity, temperature and food influenced the faunal abundance.
53 citations
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TL;DR: In this paper, a study was carried out to determine the water quality of the beaches at Matrouh, south-eastern Mediterranean Sea, Egypt, by studying environmental variables as well as phytoplankton abundance and community structure.
53 citations
Authors
Showing all 4731 results
Name | H-index | Papers | Citations |
---|---|---|---|
Amit Kumar | 65 | 1618 | 19277 |
Muhammad Tahir | 65 | 1636 | 23892 |
Shubha Sathyendranath | 64 | 246 | 18141 |
Anjan Chatterjee | 61 | 276 | 11675 |
Stephen E. Calvert | 60 | 108 | 12044 |
Michael D. Krom | 59 | 137 | 10846 |
Victor Smetacek | 59 | 135 | 19279 |
Nicola Casagli | 58 | 391 | 11786 |
Michael S. Longuet-Higgins | 56 | 132 | 15846 |
Baruch Rinkevich | 54 | 249 | 8819 |
Jérôme Vialard | 52 | 160 | 9094 |
Matthieu Lengaigne | 51 | 147 | 11510 |
José M. Carcione | 50 | 346 | 9421 |
Antonio M. Pascoal | 49 | 371 | 8905 |
Assaf Sukenik | 49 | 125 | 7166 |