Modern pollen assemblages from Reasi (Jammu and Kashmir), India: a tool for interpreting fossil pollen records

Quamar, Mohammad Firoze; Ali, Sheikh Nawaz; Pandita, Shevita; Singh, Yashwant

doi:10.1080/00173134.2018.1478990

Cited by 7 publications

(2 citation statements)

References 26 publications

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“…In a study of the dispersal of modern pollen in Reasi District (Quamar et al, 2018b), where samples (moss polsters) were collected from open areas of the forest along the Reasi-Katra Route, Pinus occurred at high frequency and dominated the pollen rain around the study area; the same was true in the present study. The conifers Podocarpus and Tsuga (extraregional temperate taxa) were recorded in Reasi at low values but were not encountered in the present study.…”

Section: Reasisupporting

confidence: 75%

The modern pollen–vegetation relationship in Jammu, India: a comparative appraisal

Quamar¹,

Tiwari²,

Thakur³

2021

Acta Palaeobotanica

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An understanding of the relationship between modern pollen and vegetation is a prerequisite for reconstruction of vegetation and climate change from fossil pollen records. We conducted palynological studies of thirty-five surface soil samples from the Jammu region of India, which revealed that Pinus, among the conifers (regional needle-leaved taxa), is over-represented in the pollen assemblage due to its high production and effective dispersal of pollen. Other coniferous and broadleaved (regional and/or extra-regional) taxa have comparatively lower values in the pollen assemblages, similar to the representation of subtropical deciduous forest elements (regional), as well as shrubby (regional and/or extra-regional) taxa. This inconsistency in the pollen assemblage could be due to long-distance transport of the former by wind and/or water from the higher reaches of the Himalayas, and also because the latter have an entomogamous pollination syndrome and are not high pollen producers. The recovered pollen assemblage presents a distorted picture of the extant vegetation; hence, caution should be exercised in interpreting fossil pollen records from the study area. Principal component analysis (PCA) shows variability in the distribution of pollen from different sites in the Jammu region, perhaps the result of transport (by wind and/ or water), altitude and/or edaphic factors of the Himalayan terrain. The study should improve our understanding of the modern pollen-vegetation relationship and aid further calibration and interpretation of fossil pollen records.

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Section: Reasisupporting

confidence: 75%

The modern pollen–vegetation relationship in Jammu, India: a comparative appraisal

Quamar¹,

Tiwari²,

Thakur³

2021

Acta Palaeobotanica

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show abstract

“…Various biotic and abiotic factors are responsible to affect the pollen production, preservation, and dispersal efficiency. Sporopollenin content present in exine aids in preservation of pollen and make it resistant toward microbial attack (Quamar, Ali, Pandita, & Singh, ). Nehemiah Grew was the first person who recognized pollen morphology.…”

Section: Introductionmentioning

confidence: 99%

Palyno‐morphological investigations of subtropical endangered flora of Capparidaceae through light and scanning electron microscopy

Mir

Ahmad

Khan

et al. 2019

Microscopy Res & Technique

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The research was performed to investigate pollen morphology of endangered species of Capparidaceae in subtropical regions of Pakistan. The distinguishing characters were investigated by using light microscope and scanning electron microscope. Palynological study is comprised of pollen shape, pollen type, exine sculpturing, polar and equatorial diameter, length and width of colpi, mesocolpium, and exine thickness. In polar view, Cleome viscosa exhibited the highest pollen size 26.4 (32.7–24.5 μm) ±0.776 whereas Capparis spinosa appeared to be the lowest 12.6 (14.5−10.7 μm) ±0.400. In equatorial view, Cleome viscosa had the largest pollen size 17.1 (20.0–15.0 μm) ±0.606 and Capparis spinosa had the smallest pollen size 9.7 (12.50–8.00 μm) ±0.394. The maximum fertility percentage has been observed in Capparis spinosa, that is, 98.96% and minimum in Cleome viscosa, that is, 82.93%. Diagnostic key has been constructed to state the essential diagnostic features by means of which the taxa can be identified. Remarkable variations have been observed in pollen size, shape, and exine sculpturing. All the selected species were tricolporate. Prolate to subprolate pollen were observed. There is a great variation existed in exine sculpturing such as in Capparis decidua and C. sp. nova sculpturing is reticulate, in Capparis himalayensis sculpturing is Scabrate granulate, in Capparis spinosa sculpturing is Psilate, in Cleome viscosa sculpturing is regulate‐reticulate, in Dipterygium glaucum sculpturing is regulate and in Gynandropsis gynandra sculpturing is striate‐regulate. On the basis of overall characteristics of pollen it seems that palynology of this family is helpful at the generic and specific level.

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Cedrus distribution change: past, present, and future

Xiao

Li²,

Wang³

et al. 2022

Ecological Indicators

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Modern pollen assemblages from Reasi (Jammu and Kashmir), India: a tool for interpreting fossil pollen records

Cited by 7 publications

References 26 publications

The modern pollen–vegetation relationship in Jammu, India: a comparative appraisal

The modern pollen–vegetation relationship in Jammu, India: a comparative appraisal

Palyno‐morphological investigations of subtropical endangered flora of Capparidaceae through light and scanning electron microscopy

Cedrus distribution change: past, present, and future

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