Anjali Trivedi

Birbal Sahni Institute of Palaeobotany · Quaternary climate

The fossil flora recovered from the Kangvai well, Ratnagiri District, Maharashtra (17°53′41″ N; 73°12′23″ E) has been used to reconstruct the monsoon variations and seasonal rainfall pattern during the Late Pleistocene (44,020 ± 390 years BP) by using the Coexistence Approach. The reconstruction suggests that the Southwest (SW) and Northeast monsoo...

Accuracy of vegetation reconstruction portraying land cover of the past is based on a careful analysis of pollen production, dispersal and their quantitative deposition. The present attempt to integrate sampling of pollen–vegetation spectrum through Crackles Protocols for vegetation surveys, at three spatial zones with intervals of 0–10 m (A), 10–1...

The pollen morphological study was carried out in the subfamily Papilionoideae using Confocal Laser Scanning Microscopy (CLSM) to facilitate the identification of pollen in sedimentary archives. Pollen has long been used as an excellent proxy for understanding past vegetation, ecology, climate and agricultural strategies of ancient settlements and...

The dynamic behavior of glaciers in the Himalayan region produced the landforms, which provide valuable information on the long-term effects of climate change and landscape evolution. The Gangotri glacier, one of the most dynamic and relatively well-documented glacial system, is longest valley glaciers out of 968 glaciers scattered over the Uttarak...

Multiproxy analyses of sediment samples from a 2.7 m trench from western Himalaya have helped in the reconstruction of vegetation and climatic changes during the last ∼15.2 ka. The data revealed that between 15.2 and 12.7 ka, the region supported alpine–scrubs and trees interspersed with meadows in a cool and moderately humid climate. The lowest d¹...

This chapter aims to compile the Holocene vegetation, climate history, and human impact in northeast (NE) India through pollen proxy records. The vegetation fluctuation retrieved through pollen proxy records plays a vital role in reconstructing forest expansion and monsoon strength. The palynofloral data are primarily derived from different ecologi...

This paper presents the results of plant macro–remain analysis from Iron Age–Historic settlement sites in Ganga Plain. The plant remains affirm the presence of distinct agricultural economy based on cereals (Oryza sativa, Hordeum vulgare, Triticum aestivum, Triticum sphaerococcum), pulses (Lathyrus sativus, Vigna sp., Macrotyloma uniflorum), oil–fi...

Pollen proxy records from 1.2 m deep sediment profile from Tundabhuj, Parvati Valley (H.P.) reveals that between 15,260 and 13,280 yr BP, the sub–alpine belt supported alpine–scrub vegetation dominated by Betula and thermophillous broad–leaved allies viz. Quercus, Corylus and Carpinus, interspersed with meadows comprising grasses, Asteraceae, Impat...

The rise of the Himalayas governed the Indian Summer Monsoon in Karewa basin during Plio-Pleistocene. A palynological study is presented to delineate the climate-vegetation relationship using an 8.5-m thick fluvio-lacustrine sequence of the Hirpur Formation (2.4–2.1 Ma). Our results suggest that the sediment sequence is mainly comprised of two unit...

Pollen, sediment texture, moisture, organic/inorganic carbon content and geochemical analyses of a 1.2m in-depth sediment profile from upper Tundabhuj Lake in the Parvati Valley show that the region supported alpine-scrub vegetation. The forest elements largely consisted of Betula and its broad-leaved allies viz., Quercus, Corylus and Carpinus inte...

The Hengduan Mountains of Southwest China are considered the most biologically diverse temperate ecosystem in the world. Here, we present a ~ 10,000-year pollen record from Shuanghaizi Lake, northwestern Yunnan, which we use to reconstruct vegetation dynamics, climatic fluctuations and variability in the Indian Summer Monsoon (ISM). The results sug...

Pollen analysis of ten surface sediment samples from Sevan Tal, Raebareli District (U.P.) reveals a good assemblage of arboreals (trees & shrubs) comprising Holoptelea integrifolia, Acacia nilotica, Syzygium cumini, Madhuca indica and Shorea robusta, etc. However, plant diversity in forest groves has been observed in eastern and southern fringes bu...

The paper highlights additional data on the carbonized remains of crop plants, weeds and wild taxa recovered from excavations at Sarethi, a multicultural site in district Faizabad, Uttar Pradesh. The field–crops are represented by the grains and seeds of Oryza sativa (rice), Hordeum vulgare (barley), Triticum aestivum (bread wheat), T. sphaerococcu...

Online Education, a technology based modern tool of education, a class without wall and boundary; with a trail of advantages associated with it: Easy availability, global accessibility, affordable cost, flexibility of time, and green examination system; has gained popularity all over the world. In India, its use is being encouraged in the field of...

Multi-proxy study of a 240 cm deep Lashoda Tal (lake) sediment profile, located adjacent to an archaeological mound in Central Ganga Plain, highlights the climate induced changes in the vegetation, ecology and culture since ∼25500 cal BP. Between ∼25500 and 22200 cal BP, the region shows grassland, incipient drainage and small ponds formed seasonal...

The Holocene (11,500 cal. a B.P. to the present) is marked by the beginning of the Neolithic Age and origin of agriculture. The Holocene climatic changes no doubt influenced vegetation successions and human living conditions. However, few studies have attempted to link the palaeo-ecological data with archaeological evidence in order to understand H...

Members of the Chenopodiaceae are the most dominant elements in the central Asian desert. The different genera and species within this family are common in desert vegetation types. Should it prove possible to link pollen types in this family to specific desert vegetation, it would be feasible to trace vegetation successions in the geological past....

The temperate desert in arid Central Asia (ACA) has acted as a thoroughfare for the ancient Silk Road and today's Belt and Road, linking economic and cultural exchanges between East and West. The interaction between human sustainable development and the dynamic change in the desert ecosystem in this region is an area of concern for governments and...

The data presented in this article are related to the research article entitled “Pollen spectrum, a cornerstone for tracing the evolution of the eastern central Asian desert” (JQSR 5260) (Lu et al., 2018) [1] In this paper, we supply a dataset, which provides a descriptive and general summary of pollen characteristic of desert dominant species in t...

Pollen analysis of 10 surface samples from Kikar Tal, Raebareli District reveals the relatively higher frequencies of non-arboreals subduing the arboreals. The consistent records of Syzygium cumini with moderate frequencies among the trees, reflects its frequent presence in the flora. However, majority of the trees, Emblica officinalis, Terminalia,...

The plants foraged by bees for honey production vary from place to place in the diverse flora of India. This paper reports a palynological study of honey from eight sites of agriculture and urbanisation in the Gangetic Plain of Uttar Pradesh (UP), and presents data from similar studies done in India. Pollen grains of 55 species were recorded in the...

A 2.0 m thick sediment profile from Kikar Tal, Raebareli District is studied for the pollen assemblage to infer the vegetation and climate variability scenario during the Holocene period. Four distinct palynozones were demarcated based on the palynological succession in the core sediment. However, the radiocarbon dates for the profile could not be...

the paper embodies the modern pollen rain-vegetation relationship, based on pollen analysis of 10 surface samples from chaudhari-ka-tal, raebareli district. the pollen assemblage reveals the dominance of non-arboreals (herbs) and relatively extremely low frequencies of arboreals (trees and shrubs). among the tree taxa, average frequencies of the ma...

The pollen analysis of 10 surface samples from Lashoda Tal (Lake) surroundings, Raebareli District, Uttar Pradesh deals with the pollen rain-vegetation relationship. The investigation reveals the dominance of non-arboreals and relatively low frequencies of arboreals. Acacia nilotica (av.10%), Holoptelea integrifolia (av. 3.9%), Syzygium cumini (av....

We apply the coexistence approach (CoA) to reconstruct mean annual precipitation (MAP), mean annual temperature (MAT), mean temperature of the warmest month (MTWA) and mean temperature of the coldest month (MTCO) at 44 pollen sites on the Qinghai-Tibetan Plateau. The modern climate ranges of the taxa are obtained (1) from county-level presence/abse...

Botany ABSTRACT A specific group of plants are foraged by honey bees and the honey produced is known to have related specific characteristics in clinical perspective. A palynological review of plants used by honeybees in wild conditions and a case study from eight sites in the Gangetic Plain (agricultural expanse and urbanisation) of Uttar Pradesh...

Pollen, sediment texture and organic/inorganic carbon analyses of a 2.1 m thick sediment profile from Chaudhary-Ka-Tal (lake) of Raebareli District, reveals that around 8470 to 6422 cal BP grasslands comprising grasses, Asteraceae, Cheno/Am, with interspersed forest groves of Madhuca indica, Holoptelea integrifolia, Shorea robusta, and Acacia, thri...

The paper embodies the modern pollen rain-vegetation relationship from sub-tropical belt, India. Palynological study was carried out on ten samples collected at sediment-water interface from lake-Bari Tal, Lucknow (UP). The quantitative and qualitative analysis of pollen and spores reveals the dominance of non-arboreals and relatively extremely low...

Pollen analytical data generated through the analysis of two sediment cores from Mansar and Surinsar lakes, lying in the subtropical belt of Jammu region, have revealed the vegetation succession, contemporary climatic episodes and impact of anthropogenic activities in the region since Early Holocene. The pollen sequence has shown the existence of m...

Based on radiocarbon dating, pollen grains and spores, geochemical and mineralogical parameters like texture, the climate prevailing in the area of Jalesar (Unnao) in UP, India has been deduced since about 42.5 Ky ago when the dominating vegetation was grass in a cool and dry climate. The paper based on samples from a 2.8 m deep core suggests a cha...

Pollen and organic-inorganic carbon analyses of a 2.8 m deep sediment profile from Jalesar Tal, Unnao District, Uttar Pradesh reveal that just prior to and between 42,490 and 13,560 cal yrs BP, this region supported grassland vegetation largely comprising grasses with scanty trees of Syzygium and Prosopis under a cool and dry climate. The coarser s...

Pollen proxy records from 1.2m deep sediment profile from Ropan Chhapra Tal, Deoria district in Uttar Pradesh have revealed that between 1350 and 600 yr BP, open grassland vegetation comprising largely grasses and heathland taxa viz., Asteraceae, Chenopodiaceae/Amaranthaceae, etc. with sprinkle of trees viz., Holoptelea, Symplocos, Acacia, etc. occ...

Pollen analysis of honey from RDSO area (Alambag) of Lucknow has revealed a good assemblage of pollen in terms of quantity and diversity. Among the recovered taxa Syzygium cumini was the major source of nectar as marked by higher frequency (37.38%) of its pollen. In addition, Prosopis juliflora (22.7%) and P. spicigera (10%) were also frequently vi...

The paper deals with the modern pollen ram/vegetation relationship, based on the pollen analysis of 5 surface samples gathered from Jalesar Lake, Unnao District (U.P.). The pollen assemblages reveal the dominance of non-arboreals and relatively low frequencies of arboreals trees & shrubs) Among the tree taxa, Acacia (av.6.35%) and Madhuca indica (a...

An event of neotectonic activity on an NE–SW trending subsidiary fault in the zone of E–W running intracrustal boundary thrust (South Almora Thrust) in the Champawat district of eastern Kumaun Himalaya resulted in creation of a lake at ca. 21.5 BP. The lake drained in the late Holocene, leaving behind a 5.0 m thick sedimentary sequence of mostly bl...

Pollen analysis of a 33.21 m deep sediment core from Surinsar lake in Jammu region has revealed that between 9,500 and 7,700 yr BP (Pollen zone SL-I), the mixed oak-broad-leaved/chirpine forest occurred in the region under a warm and humid climate. The record of aquatic plants viz. Potamogeton, Typha and freshwater alga Botryococcus in appreciable...

Pollen analysis of a 30 m deep sediment core from Mansar Lake has revealed that around 9000–8000 yrs BP, the mixed chirpine–oak forests dominated by Pinus cf. roxburghii (chirpine) existed in the Jammu region under a cool and dry climate. Later, they were succeeded by mixed oak–chirpine forests between 8000 and 7000 yrs BP with the expansion of oak...

An event of neotectonic activity on an NE–SW trending subsidiary fault in the zone of E–W running intracrustal boundary thrust (South Almora Thrust) in the Champawat district of eastern Kumaun Himalaya resulted in creation of a lake at ca. 21.5 BP. The lake drained in the late Holocene, leaving behind a 5.0 m thick sedimentary sequence of mostly bl...

Study of pollen and spores retrieved from the spider webs provides interesting new frontiers to evaluate the aerospora of a region. Such studies carried out for Lucknow environs have yielded a variety of palynomorphs such as pollen grains and fungal spores besides insect body fragments, etc. These studies are of immense significance to understand t...

Study of pollen and spores retrieved from the spider webs provides interesting new frontiers to evaluate the aerospora of a region. Such studies carried out for Lucknow environs have yielded a variety of palynomorphs such as pollen grains and fungal spores besides insect body fragments, etc. These studies are of immense significance to understand t...