Shankhadeep Chakraborty

19 Questions 51 Answers 0 Followers

Questions related from Shankhadeep Chakraborty

Is it justified to use the term 'extinct' to a species?

Black-footed ferret (Mustela nigripes), a North American species presumed extinct in 1979 until it was rediscovered in 1981. Same thing happened to the Bermuda petrel, peccary, venomous Cuban...

15 June 2022 4,173 11 View

What is the value of soil salinity in surface layer of Indian Sundarbans mangrove ecosystems?

If you have worked or are working on this area please attach reference papers.

02 June 2018 3,318 4 View

Is there any other community apart from bacteria in a bio-filter?

Bacteria (both aerobic and anaerobic) are observed to constitute a bio-filter. Is there any associated communities helping bacteria?

31 July 2016 6,198 7 View

How to determine which gene(s) are responsible for bioremediation of toxic metals by microbes?

Genes are controlling factor of various physiological responses as we all know. Is there any model or general procedure behind determination of particular gene responsible for bioremediation? Have...

27 June 2016 7,583 6 View

How Geo-accumulation index for heavy metals can be calculated?

What is the significance of this index? Add reference paper if possible.

24 April 2016 8,037 21 View

What is a trigger for opening a sequoia cone?

Young sequoias are able to grow successfully only in mineral soils in full sunlight, free from competing vegetation.

27 June 2015 6,451 9 View

Which enzymes are responsible for heavy metal detoxification process in different bivlaves groups?

Metallothionein is one of such enzyme.

31 March 2015 4,200 4 View

Can anyone tell me the statistics of rate of rise or fall of sediment Zn, Cu and Pb in world oceans and seas per year?

I need the statistics. If possible add links of scientific papers.

09 March 2015 8,022 2 View

Can mangroves and mangrove associates be a good source of anti-oxidants?

Astaxanthin, a potent anti-oxidant, is already been extracted from mangroves. Add more information related to the question.

24 January 2015 6,642 5 View

Can the Shannon-Weiner species diversity index be a good monitoring tool for assessment of health of any type of ecosystem?

Diversity indicates the condition of an ecosystem.

06 January 2015 976 35 View

Can anyone add a list of deadlier animals found in Mangrove ecosystems in eastern Indian mangrove forest?

Mangrove ecosystem is one of the important richer biodiversity zone in the world. I am adding two- the Royal Bengal tiger and the cobra. Add more as per your knowledge.

27 December 2014 143 5 View

Heritiera fomes (Sundari plants) are diminishing in number from Indian Sundarbans. Why?

Increase of salinity due to decrease of freshwater input may be one reason. Give more reasons. Attach your papers on it if possible.

26 December 2014 3,427 2 View

What is concentration index and transfer index of heavy metals? How are these calculated?

Concentration index and transfer index for heavy metals are two important parameters.

06 December 2014 6,563 5 View

Is there any relationship between phytoplankton bloom and turbidity of water?

Turbid water generally affect the biodiversity badly.

01 December 2014 7,124 10 View

Is there is any method for estimation of heavy metal level in dissolved state and in organisms tissue better than AAS?

Atomic Absorption Spectrophotometry is a reliable method. But is there any other more reliable method?

25 November 2014 2,807 14 View

What are the physico-chemical factors that play a role in controlling the bio-concentration factors of heavy metals?

Water and sediment pH plays a big role on the bio-concentration factor. I need more information about other factors.

22 November 2014 6,092 3 View

Can anyone tell me the detailed processes behind the physiological adaptations seen in Mesembryanthemum crystallinum (The Ice plant)?

Mesembryanthemum crystallinum is a prostrate succulent plant native to Africa, Sinai and southern Europe, and naturalized in North America, South America and Australia. I need the detailed...

19 November 2014 7,585 3 View

Is there any relationship between rhizosphere associated microbial community and accumulation of heavy metals by mangroves?

Great symbiotic association was found by investigators between rhizosphere of mangroves and microbial community in past few decades. But do the microbial community help in the process of...

03 October 2014 1,963 7 View

What will be the probable effect of water and sediment pollution on mangroves?

Due to rapid pace of industrialization and urbanization, the estuarine water and sediment are getting polluted day by day. As a result, the pollutants are also getting accumulated into the tissues...

21 September 2014 8,276 20 View