Ruby Ghosh

Ruby Ghosh
Birbal Sahni Institute of Palaeosciences, Lucknow, India

Ph.D

About

66
Publications
17,206
Reads
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710
Citations
Additional affiliations
July 2011 - present
Birbal Sahni Institute of Palaeosciences
Position
  • Researcher
January 2001 - July 2011
University of Calcutta
Position
  • BSRS, Ext-SRF, CSIR, CSIR-RA
Education
December 2002 - December 2008
University of Calcutta
Field of study
  • Palaeobotany-Palynology

Publications

Publications (66)
Article
Seven fossil leaves with cuticle described here were collected from the lower, middle and upper strata of Siwalik (middle Miocene–lower Pleistocene) sediments of Arunachal Pradesh, India. A detailed comparison of the cuticular analysis of the fossils and their living relatives indicate that these fossil species belong to Dysoxylum raptiensis, Macar...
Article
This study reports phytolith diversity in respiratory aerial roots of some true mangrove plants for the first time. To identify the signal of phytoliths retrieved from these respiratory roots in the modern deltaic environments, we have analyzed the phytolith contents of pneumatophores and/or pneumatothodes of 13 mangrove species from 7 families inh...
Article
Phytoliths have been proved as reliable indicators of an ecosystem's structure in both modern days as well as in the past. Quantitative phytolith studies from modern plants in India are negligible and most of the data comes from grasses excepting few pteridophytes. Data on non-grass angiospermous phytoliths in India is however completely lacking. I...
Article
Full-text available
It is demonstrated that palynomorphs can occur in fired ancient potsherds when the firing temperature was under 350°C. Pollen and phytoliths recovered from incompletely fired and fully fired potsherds (ca. 2700 yrs BP) from the Yanghai Tombs, Turpan, Xinjiang, NW China can be used as potential indicators for reconstructing past vegetation and corre...
Article
We synthesise records of stable carbon isotopes (δ¹³C values), TOC/TN, magnetic susceptibility (χlf), palynology, and phytoliths for a late Quaternary lacustrine archive from the northern Gangetic Plain, India to determine the primary driver(s) of past C3/C4 plant variability. The study reveals nine climate-driven shifts in vegetation over the last...
Article
Full-text available
Modern feces samples of the endangered red panda (Ailurus fulgens) were examined using multiproxy analysis to characterize the dietary patterns in their natural habitat in India. An abundance of Bambusoideae phytoliths and leaves (macrobotanical remains) provide direct evidence of their primary dietary plants. In contrast, Bambusoideae pollen is sp...
Article
Reliability of grass phytoliths for discriminating different deltaic sub-environments has been assessed on the modern surface sediments collected along the salinity gradient of the Sunderbans delta, India. It has been observed that grass phytolith assemblages can successfully distinguish different deltaic sub-environments especially the true mangro...
Article
Phytolith assemblages of Shorea robusta Gaertn. (Dipterocarpaceae), an important constituent of tropical deciduous/semi-evergreen forests were studied from six different districts of West Bengal, the western margin of the Bengal Basin. Since S. robusta grows in the tropical mixed dry to wet deciduous and semi-evergreen forests and can tolerate a wi...
Article
Porteresia coarctata (Roxb.) Tateoka is a true halophytic perennial wild grass that grows profusely along newly formed, highly saline landmasses and mudflats in the coastal mangroves of the Indian subcontinent and acts as a pioneer species in mangrove succession. Comprehensive phytolith analyses on sixteen P. coarctata samples collected from differ...
Article
This study highlights the modern pollen-vegetation relationships along an altitudinal gradient covering the lower temperate (∼2,000 masl) to alpine vegetation zones (∼3,800 masl) in the Bhagirathi valley, western Himalaya. The pollen dispersal dataset compared with the altitudinal vegetation distribution in the valley shows incoherency between the...
Article
To assess the pattern of climatic evolution during the late Miocene to early Pleistocene in the largest fluvio-deltaic sedimentary system on the Earth, the Bengal Basin (BB), a quantitative palaeoclimatic reconstruction was made, based on 20 fossil wood floras. Those floras show that moisture-loving taxa have decreased considerably since the Miocen...
Article
Past climate reconstructions from palaeoecological records require an understanding of relationships between modern vegetation and climate. Phytoliths are being used widely to reconstruct variations in C3/C4 grasses in the past vegetation and corresponding climate. However, little understanding is available on their relationships with the climate d...
Article
Past climate reconstructions from palaeoecological records require an understanding of relationships between modern vegetation and climate. Phytoliths are being used widely to reconstruct variations in C3/C4 grasses in the past vegetation and corresponding climate. However, little understanding is available on their relationships with the climate d...
Article
Full-text available
In order to understand the relationship between modern pollen spectra and vegetation, we analysed 20 surface sediment samples collected from the alpine zone of Kalla Bank glacier valley, Dhauliganga Basin, India covering an elevational stretch of c. 3600 to 5000 m asl and vegetation zones like the alpine scrub, alpine meadow and alpine barren. This...
Book
Full-text available
Abstract volume of 12th International Symposium on Fossil Algae
Article
To understand the relationship of phytolith production patterns in regional pteridophytes with elevation dependent climatic variables, and their potential to differentiate vegetation zones of the eastern Himalayan Mountain, we have studied phytolith spectra of 58 pteridophytic species of 22 families from tropical–temperate vegetation belts of Darje...
Article
Full-text available
In order to quantify the Indian summer monsoon (ISM) variability for a monsoon dominated agrarian based Indian socio-economy, we used combined high resolution δ13C, total organic carbon (TOC), sediment texture and environmental magnetic data of the samples from a ~3 m deep glacial outwash sedimentary profile from the Sikkim Himalaya. Our decadal to...
Article
To understand the present day climate change impacts on ecosystem, knowledge of the rapid climatic events occurred within the last few thousand years is crucial. Indian summer monsoon (ISM) dominated eastern Himalayan vegetation is sensitive to even a minor change in climate parameters, hence suitable for studying climate-plant interactions. We rec...
Article
Full-text available
The present study is the first attempt from any Indian wetland, where palynological data is assessed to understand the flooding histories of the Sakali and Duboi wetlands in the Majuli River Island, a part of the Indo-Burma hotspot. Palynological analyses of surface soil samples from these wetlands were carried out in order to explore the flooding...
Article
Phytoliths are microscopic silica bodies deposited in and between plant cells. They are known to be important environment indicators and thus hold significant prospect for present and past ecological and environmental interpretations. We present here results of morphometric and assemblage analyses of phytoliths from five Panicoid grasses, i.e. Chry...
Article
Full-text available
The fungal elements comprising 22 genera and 36 species have been recorded from the Lower Siwalik sediments (Middle Miocene-Upper Miocene) of Arunachal Pradesh, northeast India. The recovered fungal morphs are mostly amerospores, didymospores, phragmospores, dictyospores, helicospore and staurospore of Fungi Imperfecti and fruit bodies of epiphyllo...
Article
Relying on the ability of pollen assemblages to differentiate among elevationally stratified vegetation zones, we assess the potential of a modern pollen-climate dataset from the Darjeeling area, eastern Himalaya, in past climate reconstructions. The dataset includes 73 surface samples from 25 sites collected from a c. 130e3600 m a.s.l. elevation g...
Article
Full-text available
We examined the modern pollen palynomorphs (PP) distribution complemented with non-pollen palynomorphs (NPP) and stable carbon isotopic data of soil organic matter (SOM) to explore relationships of these proxies to vegetation communities in the Chopta valley, a closed valley in alpine zone of the North Sikkim, India, in an attempt to check the effi...
Article
In spite of their demonstrated implications as ecological indicators, modern analogue studies of non-pollen palynomorphs (NPPs) from the mountainous regions are still meagre. We present here the results of a study on modern NPP assemblages recovered from surface samples (soils, sediments from lake surface and bog etc.) along a c. 130–3600 m a.s.l....
Article
In spite of their demonstrated implications as ecological indicators, modern analogue studies of non-pollen palynomorphs (NPPs) from the mountainous regions are still meagre. We present here the results of a study on modern NPP assemblages recovered from surface samples (soils, sediments from lake surface and bog etc.) along a c. 130–3600 m a.s.l....
Article
The chemical composition of fossil resins from middle to late Eocene lignite samples of the western margin of Bengal Basin, India, has been chemically analyzed to infer their botanical affinity. The terpenoid content of the resins has been characterized using Gas Chromatography–Mass Spectrometry (GC−MS). Sesquiterpenoid and triterpenoid components...
Article
While documenting the vegetation response to climatic changes in mountains, the use of grass phytolith data relies on the ability of phytolith assemblages or indices to differentiate the elevationally stratified vegetation zones. To infer the potential and limitations of grass phytolith assemblages and indices to reconstruct vegetation vis-à-vis cl...
Article
Pollen, phytoliths and δ 13C signatures of soil organic matter from two fluvial sedimentary sequences of the Darjeeling foothill region, eastern Himalayas are used to portray palaeoclimatic oscillations and their impact on regional plant communities over the last ∼50 ka. Quantitative palaeoclimate estimation using coexistence approach on pollen dat...
Article
Full-text available
Pollen, phytolith and stable carbon isotopic records provide new insights into the palaeoenvironmental and palaeoclimatic changes in Ziro Lake Basin, sub-Himalayan Arunachal Pradesh, India since pre-LGM time. Phytoliths record a minor change in grass/woodland cover and appear to be more sensitive than pollen grains to climate fluctuations. Both pol...
Data
a b s t r a c t Pollen, phytolith and stable carbon isotopic records provide new insights into the palaeoenvironmental and palaeoclimatic changes in Ziro Lake Basin, sub-Himalayan Arunachal Pradesh, India since pre-LGM time. Phytoliths record a minor change in grass/woodland cover and appear to be more sensitive than pollen grains to climate fluctu...
Article
Full-text available
Erratum to: Palaeobio Palaeoenv (2011) 91:237–255DOI 10.1007/s12549-011-0059-zUnfortunately some mistakes have been noticed in the above- mentioned article after publication. The corrections are as follows:In the text (in pg nos. 237, 252 and 253) all the values of mean annual precipitation (MAP) should be in cm (centimetre) instead of millimetre (...
Article
Full-text available
Climatic variability during the Holocene and corresponding anthropogenic response have gained considerable attention in different parts of India, but surprisingly very little is known on climate-human interrelationship from eastern India especially from the Gangetic plains of West Bengal. As climate has played significant role behind the collapse o...
Article
Grasses are among the most abundant, diverse and ecologically important group of plants; their number and diversity make them a significant part of the ecosystem. The characteristic presence of opaline silica in grasses makes them a valuable tool in environmental reconstruction over other groups of vascular plants. Fifty grass taxa belonging to fou...
Article
Full-text available
A morpho-taxonomic study of leaf remains from the upper part of the Siwalik succession of sediments (Kimin Formation; upper Pliocene to lower Pleistocene) of Papumpare district, Arunachal Pradesh, India, revealed 23 species representing 20 genera belonging to 15 angiosperm families. The recovered fossil leaves are comparable to modern Bambusa tulda...
Article
Diverse palynomorphs and phytoliths recovered from coprolites of ovi-caprids (sheep, goat) collected from Yang-Hai Tomb at Xinjiang Province, China, have been used to elucidate the dietary pattern of ancient livestock and to reconstruct the paleovegetation and paleoclimate of this part of northwest China ca. 2500 14C yr BP. Palynological and phytol...
Article
Potsherds from archaeological sites are usually found barren of palynomorphs. Recently half burnt potsherds from an excavation site dated to 3320 AE 400 years BP to 2080 AE 80 years BP in Gangetic West Bengal, India yielded some palynotaxa. That palynomorphs can remain preserved in half burnt potsherds was experimentally proved with pots made from...
Article
Diverse plant remains recovered from an archaeological site of Chalcolithic-Early Historic age in the Bhairabdanga area of Pakhanna (latitude 23°25′N, longitude 87°23′E), situated on the west bank of the Damodar river, Bankura district, West Bengal, India, include food grains, wood charcoals, and palynomorphs. Radiocarbon dating of the recovered bi...
Article
Phytoliths of poaceous origin with diverse shapes and sizes are recovered from C14 dated sedimentary layers of an archaeological site at Pakhanna, district Bankura, West Bengal, India. The data accumulated on phytoliths assigned to subfamilies and genera are utilized to explore human-plant relationship in the contemporary time. Among the phytoliths...
Article
Full-text available
Pollen, phytolith and stable carbon isotopic records provide new insights into the palaeoenvironmental and palaeoclimatic changes in Ziro Lake Basin, sub-Himalayan Arunachal Pradesh, India since pre-LGM time. Phytoliths record a minor change in grass/woodland cover and appear to be more sensitive than pollen grains to climate fluctuations. Both pol...

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Question (1)
Question
These cyst like structures have been recovered from surface samples collected from a tropical lake bed in high abundance.

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Projects (3)
Project
NECLIME is an open international network of scientists working on Cenozoic climate evolution and related changes of continental ecosystems. During the past 65 million years of Earth history, globally warmer-then-present conditions prevailed in a world with almost modern paleogeography. These timespans represent promising case studies for anticipated future scenarios. Within the NECLIME network, we aim to combine data on past climate change and its environmental impact for large-scale reconstructions. NECLIME research activities comprise paleoclimate reconstructions, including atmospheric CO₂ and ecosystem analysis using multiple quantitative methods on various primarily continental proxies (plants; vertebrates; invertebrates; geochemistry and geological proxies). Complementing model studies are employed to assess connections and processes driving ocean, atmosphere and biosphere at global and regional scales. NECLIME was established in 1999 with the aim to understand Neogene trends across Eurasia. This basic idea quickly and constantly expanded to a global interest and a wider stratigaphical frame. The steadily growing NECLIME network with currently around 140 members in 34 countries is coordinated by a team of researchers and an advisory board. NECLIME holds annual conferences and workshops and administers working groups bringing forward scientific exchange, joint projects, and the integration of research data. For more information go to www.neclime.de
Project
This intricate relationship of phytoliths and their plant specific production can be exploited in paleoenvironmental reconstruction as different plants have definite ecological requirements. Apart from structural distinctness another major advantage of these silicomorphotypes over other plant proxies are their durability both in living plants and soils and they can be recovered from variety of sediments like loess, lake-mud, sand dunes, tephra section, coastal plain sequences etc. Moreover, use of phytolith indices viz. Ic % [Climatic Index]; Iph % [Humidity-aridity index]; Fs [Water stress index] and D/Pº [Tree cover density index] has also proved to be a dependable tools in deciphering long term as well as short term climatic variation of the past. But these indices were proposed from different parts of the world especially keeping the North American and African vegetation and climate in mind. The vegetation and climate of the eastern Himalayas are different from the above mentioned regions as the topography of the eastern Himalayas exhibit high variation along altitudinal gradient (c. 60-8000 m) and maximum change in the climatic parameters are noticed in response to certain changes in the elevation leading to idiosyncratic plant growth. Moreover this region is highly monsoon dominated. Thus unique ecoclimatic conditions have given rise to varied vegetation zones along the elevation gradient ranging from tropical to alpine. Therefore, before using the phytolith indices in past climate reconstruction of this region it is essential to check the working potential of modern phytolith assemblages and indices in discriminating the different vegetation zones along the changing elevation of the eastern Himalayas and whether any calibrations of the indices are needed. This study will increase the reliability of using these indices in the eastern Himalayas and may help interpret the fossil assemblage more accurately.