Modern pollen and its ecological relationships with the tropical deciduous forests of central Uttar Pradesh, India

Tripathi, Swati; Arya, Ajay Kumar; Basumatary, Sadhan K.; Bera, S. K.

doi:10.1080/01916122.2015.1045049

Cited by 12 publications

(4 citation statements)

References 77 publications

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“…Similar inferences have been drawn from the studies conducted on modern pollen rain-vegetation relationship in other regions of the tropical belts of the country with deciduous forest having similar and/or varied vegetation composition (Dixit & Bera, 2011;Quamar & Bera, 2014;Tripathi et al, 2015).…”

Section: Platesupporting

confidence: 77%

Pollen deposition pattern in Kathali wetland and its adjoining areas of Garo Hills, Meghalaya, northeast India

Basumatary¹,

Tripathi²,

Jalil

et al. 2015

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This paper presents a palynological dataset on Kathali wetland and vicinity forest area to characterize the pollen depositional pattern in relation to existing vegetation. The overall palynodata is suggestive of the tropical deciduous forest admixture with the evergreen taxa which coheres with extant vegetation. Pollen clumping in the palynoassemblage was highly significant and suggests their local origin and entomophilous nature. The various pollen distributions were observed in continuation at study sites which confirmed that the pollen deposition pattern in wetland depends on parent plant growth, water level and surrounding vegetation. The main forest elements include Syzygium, Salmalia, Lagerstroemia, Duabanga and Barringtonia along with Impatiens in the palynoassemblage which strongly indicate the high rainfall in the region. Thus, the generated modern palynodata could be precisely utilized to reconstruct the palaeovegetation and past climate in relation to palaeomonsoonal activity through the pollen analysis of sedimentary core/profile from the region and its correlation with other tropical parts of India and Asia.

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Section: Platesupporting

confidence: 77%

Pollen deposition pattern in Kathali wetland and its adjoining areas of Garo Hills, Meghalaya, northeast India

Basumatary¹,

Tripathi²,

Jalil

et al. 2015

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“…Understanding the interaction between pollen rain and a region's existing vegetation is crucial to the effectiveness of this strategy. Because pollen deposits in every area represent that location's vegetation structure and preservation condition, the study of the modern pollen rain can be helpful in reliably establishing the pollen/ vegetation relationship (Tripathi et al, 2016). This will help in better understanding the same relationship in fossil samples because it is impracticable to directly reconstruct past vegetation/climate correlations.…”

Section: Discussionmentioning

confidence: 99%

Palynological response deduced through spatially distinct surface samples to reconstruct palaeoecology and palaeoclimate of the Barak Valley, Assam (Indo-Burma region), northeast India

Tripathi,

Pandey

2023

Journal of the Palaeontological Society of India

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Establishing modern pollen analogues under various vegetation types in a location is necessary without which it is difficult to accurately interpret fossil pollen assemblages in any region in terms of the past environment and palaeoclimate. We have analysed the modern pollen dataset of 30 surface soil and sediment samples from the forested, cropland, wetland and river sites of the Karimganj District in south Assam, to comprehend the connection between the recent pollen assemblage and the vegetation patterns in the Barak Valley. The overall pollen data reflect the tropical moist deciduous and semi-evergreen forest comprising Syzygium, Schleichera, Terminalia, Lagerstroemia, Duabanga, Sapotaceae, Ilex, Mesua and Schima under a warm and humid climate in response to rainfall variations in the region. The presence of Euphorbiaceae and Convolvulaceae inferred high monsoonal activity in and around the region. A robust relationship between local herbaceous vegetation and pollen was observed. The steady occurrence of cereal pollen (average 18.67%) along with other cultural pollen taxa like Brassicaceae, Coriandrum and Solanaceae illustrate intense agricultural activity around the valley areas. Multivariate principal component analysis (PCA) and box plot were applied to the quantified data obtained from pollen frequency analyses of the surface samples which clearly revealed a significant variation and similarity in vegetation types. Thus, an attempt has been commenced to precisely observe the behavioural pattern of modern pollen deposition in a varied depositional setting, which could, in turn, help in assessing the expanse of agricultural practices and the depth of deterioration of pristine forests and surrounding areas. This modern training dataset could also help in the precise reconstruction of past climate and vegetation shifts in the Barak Valley region. A correlation of regional palynodata with other regions of the Indian subcontinent and Indo-Burma will also be assessed for better interpretation.

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“…These extremely fertile alluvial soils range from sandy to clayey loam. The soils in the southern part of the state are generally mixed red and black or red to yellow in colour; however, it is alluvium in and around the study area (Tripathi et al, 2016).…”

Section: Climate and Soilmentioning

confidence: 95%

“…Although studies on qualitative pollen-vegetation relationship within different vegetation types have also been carried out in India (Bonnefille et al, 1999;Anupama et al, 2000;Bera, 2000;Dixit & Bera, 2011Basumatary et al, 2013;Ranhotra & Bhattacharyya, 2013;Quamar & Bera, 2014;Basumatary et al, 2014Basumatary et al, , 2017Basumatary et al, , 2018Tripathi et al, 2016;Pandey & Holt, 2017;Bajpai & Kar, 2018;Pandey & Minckley, 2019;Srivastava et al, 2019;Quamar & Kar, 2020), but quantitative relationship studies are scanty (Barboni & Bonnefille, 2001;Navya et al, 2017). Further, there are several palynological works on sedimentary soil sequences in northern India (Gupta, 1978;Chauhan et al, 2004;Saxena et al, 2006;Chauhan & Chatterjee, 2008;Chauhan et al, 2009;Ranhotra & Bhattacharyya, 2010;Farooqui & Sekhar, 2011;Trivedi et al, , 2013, but studies on qualitative surface pollen samples are scanty (Sharma et al, 2006;Tripathi et al, 2016). Dixit and Bera (2012) suggested that comparing multiple points of pollen data, along with variations among taxa and sites would help us to understand the vegetation structure more vividly.…”

Section: Introductionmentioning

confidence: 99%

Surface pollen quantification and floristic survey at Shaheed Chandra Shekhar Azad (SCSA) Bird Sanctuary, Central Ganga Plain, India: a pilot study for the palaeoecological implications

Tripathi¹,

Srivastava²,

Garg

et al. 2022

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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), 10–100 m (B) and 100–1000 m (C) at Shaheed Chandra Shekhar Azaad Bird Sanctuary in Uttar Pradesh with tropical dry deciduous forest, is a maiden approach. In these studies, the standard vegetation survey around the pollen surface sampling sites is prerequisite for quantifying pollen–vegetation relationship in modern analogues of the past. The underlying theory of this approach is based on the fact that the relative pollen productivity (RPP) is constant in space and time within a region or biome. The floristic survey of the sanctuary is integral to this pilot study, Crackles Bequest protocol, and is intrinsic to run the Extended R–Value (ERV) model for obtaining estimates of relative pollen productivities (RPPs) for quantitative palaeoecological interpretations from tropical to subtropical forest covers in northern India. The modern pollen assemblage from surface sediment samples established the dominance of Poaceae pollen, along with those of Acacia, Albizia and Mimosa species. The multivariate principal component analysis (PCA), applied to quantify the data on the survey of different vegetation communities revealed that out of the four identified vegetation communities, community D consisted of herbaceous patches including Ageratum, Parthenium, Rumex, Tephrosia, Eclipta alba, Oxalis, Cannabis and Launea, community B mainly comprised of tree taxa like Terminalia, Barringtonia and Pongamia, whereas the communities A and C represented mixed vegetation comprising of trees, shrubs and herbs. The present maiden analysis through the Crackles Bequest protocol method served as a preliminary step to establish the quantitative ‘pollen–based’ vegetation reconstruction in the Gangetic Plains of Central India and is expected to serve as a model for similar studies in other regions. सारांश अतीत के भू-आवरण को चित्रित करने वाले वनस्पति पुनर्निर्माण की सटीकता पराग उत्पादन, फैलाव और उनके मात्रात्मक जमाव के सावधानीपूर्वक विश्लेषण पर आधारित है। शहीद चंद्र शेखर आज़ाद (एससीएसए) पक्षी अभयारण्य, मध्य गंगा मैदान से 0-10 मीटर (ए), 10-100 मीटर (बी) और 100-1000 मीटर (सी) के अंतराल में तीन स्थानिक क्षेत्रों में, वनस्पति सर्वेक्षण के लिए क्रैकल्स प्रोटोकॉल के माध्यम से पराग-वनस्पति स्पेक्ट्रम के नमूने को एकीकृत किया गया। यह भारत के उष्णकटिबंधीय शुष्क पर्णपाती वन से किया गया प्रथम प्रयास था। पुरावनस्पति एवं पुरापारिस्थितिकी को समझने के लिए पराग-वनस्पति संबंधों को निर्धारित करने की आवश्यकता है। आधुनिक सादृश्य को स्थापित करने के लिए पराग सतह नमूना स्थलों के आसपास मानक वनस्पति सर्वेक्षण अनिवार्य है। इस दृष्टिकोण का अंतर्निहित सिद्धांत इस तथ्य पर आधारित है कि सापेक्ष पराग उत्पादकता (आरपीपी) एक क्षेत्र या बायोम में स्थानिक व लौकिक रूप से स्थिर है। अभयारण्य का वनस्पति सर्वेक्षण इस मूल अध्ययन, क्रैकल्स बेक्वेस्ट प्रोटोकॉल का अभिन्न अंग है, और उत्तरी भारत के उष्णकटिबंधीय से उपोष्णकटिबंधीय वनों में मात्रात्मक पुरापारिस्थितिक व्याख्याओं के लिए सापेक्ष पराग उत्पादकता (आरपीपी) के अनुमान प्राप्त करने के लिए विस्तारित आर-वैल्यू (ईआरवी) मॉडल को चलाने के लिए वास्तविक है। सतह तलछट के नमूनों से आधुनिक पराग जमाव ने अकेसिया, अल्बिजिया और माइमोसा प्रजातियों के साथ-साथ पोएसी (घास) पराग के प्रभुत्व को स्थापित किया है। विभिन्न वनस्पति समुदायों के सर्वेक्षण पर डेटा की मात्रा निर्धारित करने के लिए लागू बहुभिन्नरूपी प्रमुख घटक विश्लेषण (पीसीए) से पता चला है कि चार पहचाने गए वनस्पति समुदायों में से, समुदाय ‘डी’ में एजेरटम, पार्थेनियम, रुमेक्स, टेफ्रोसिया, एक्लिप्टा अल्बा, ऑक्सलिस, कैनाबिस और लाउनिया सहित गैर-वृक्षीय प्रजातियों के समूह शामिल हैं। समुदाय ‘बी’ में मुख्य रूप से टर्मिनलिया, बैरिंगटोनिया और पोंगामिया जैसी वृक्षीय प्रजातियाँ शामिल हैं, जबकि समुदायों ‘ए’ और ‘सी’ ने पेड़ों, झाड़ियों और जड़ी-बूटियों से युक्त मिश्रित वनस्पति का प्रतिनिधित्व किया। क्रैकल्स बेक्वेस्ट प्रोटोकॉल पद्धति के माध्यम से वर्तमान प्रथम विश्लेषण, मध्य भारत के गंगा के मैदानों में मात्रात्मक 'पराग-आधारित' वनस्पति पुनर्निर्माण स्थापित करने के लिए एक प्रारंभिक कदम है, और अन्य क्षेत्रों में इसी तरह के अध्ययन के लिए यह एक प्रतिमान के रूप में कार्य करेगा।

show abstract

Modern pollen and its ecological relationships with the tropical deciduous forests of central Uttar Pradesh, India

Cited by 12 publications

References 77 publications

Pollen deposition pattern in Kathali wetland and its adjoining areas of Garo Hills, Meghalaya, northeast India

Pollen deposition pattern in Kathali wetland and its adjoining areas of Garo Hills, Meghalaya, northeast India

Palynological response deduced through spatially distinct surface samples to reconstruct palaeoecology and palaeoclimate of the Barak Valley, Assam (Indo-Burma region), northeast India

Surface pollen quantification and floristic survey at Shaheed Chandra Shekhar Azad (SCSA) Bird Sanctuary, Central Ganga Plain, India: a pilot study for the palaeoecological implications

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