Variation in cone and seed characters in blue pine (Pinus wallichiana) across natural distribution in western Himalayas

The present study focuses on the forest structure of highly disturbed sites in Western Himalayan regions in Pakistan. In this study, the regeneration potential of conifer species is a key point for the assessment of future conifer status in disturbed environment by employing multivariate techniques. The forests are composed of four conifer species Pinus wallichiana A. B. Jacks, Pinus roxburghii Sarg., Cedrus deodara (Roxb.) G. Don, and Abies pindrow (Royle ex D. Don) Royle., associated with broadleaved species Quercus baloot Griffith, Quercus dilatata Raf., and Aesculus indica (Wall. ex Cambess.) Hook. Cluster analysis shows five groups when Pinus wallichiana (PW) forms the largest group, incorporates with other conifers and broadleaved species and in some cases it overlaps with its subgroups forming a pure larger group. Similarly in DCA (ordination) overlapping exists in all the axes while elevation is the only variable that shows a highly significant (P < 0.001) correlation with conifers. Cedrus deodara (CD) with Quercus baloot (QB) and Aesculus indica (AI) shares a significant (P < 0.05) correlation in the same habitat while there is no correlation between the remaining conifers. It is anticipated that overlapping in cluster analysis and ordination and non-significant correlations in cluster analysis and ordination are due to the highly disturbed nature of the sites. It is also suggested that seedling recruitment and development are highly affected due to the anthropogenic disturbance. Therefore, proper maintenance of the forest, proper management and conservational practice should be imposed.

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Growth-climate relationship of Pinus wallichiana in three different parts of the Himalayas

Banko Janakari ◽

10.3126/banko.v30i1.29177 ◽

2020 ◽

Vol 30 (1) ◽

pp. 12-20

Author(s):

S. Bhandari ◽

J. H. Speer

Keyword(s):

Tree Ring ◽

Positive Response ◽

Palmer Drought Severity Index ◽

Severity Index ◽

Winter Temperature ◽

Drought Severity ◽

Western Himalayas ◽

Eastern Himalayas ◽

Pinus Wallichiana ◽

Drought Severity Index

We have used six tree-ring width chronologies of Pinus wallichiana from the Himalayan region, which are available in the International Tree-Ring Data Bank (ITRDB), to determine their growth trends through time and the growth-climate relationship. Each of the chronologies downloaded from the ITRDB was detrended using an Age-dependent Cubic Smoothing Spline with a 20-year starting spline stiffness in the RCSigfree Software Program. We broke the six chronologies into three regions based on natural breaks between the sample sites. Altogether, three composite chronologies were made, one each from Bhutan, Nepal, and Pakistan. The average value for common periods was taken from each of those two chronologies to make a composite chronology. Across the three regions, the growth was lowest in the 1810s and has increased since 1980s. The growth showed a significant positive response to the winter temperature (November-February) in the eastern Himalayas in Bhutan. The chronology from Nepal showed that the growth of this species had a significant positive response to the self-calibrated Palmer Drought Severity Index of the previous year’s December and the current year’s January and March. In the western Himalayas of Pakistan, the growth of the same species is positively correlated to the annual self-calibrated Palmer Drought Severity Index. Winter temperature limits the growth of this species in the eastern Himalayas where there is enough moisture whereas the growth of this species is primarily limited by moisture in the western Himalayas

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Variation in Soil CO2 Efflux in Pinus Wallichiana and Abies Pindrow Temperate Forests of Western Himalayas, India

Forest Research Open Access ◽

10.4172/2168-9776.1000116 ◽

2014 ◽

Vol 03 (01) ◽

Cited By ~ 1

Author(s):

Sundarapandian SM Javid Ahmad Dar

Keyword(s):

Temperate Forests ◽

Soil Co2 Efflux ◽

Co2 Efflux ◽

Western Himalayas ◽

Soil Co2 ◽

Pinus Wallichiana ◽

Abies Pindrow

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Ethnomycological and Nutritional Analyses of Some Wild Edible Mushrooms from Western Himalayas, Azad Jammu and Kashmir (Pakistan)

International Journal of Medicinal Mushrooms ◽

10.1615/intjmedmushrooms.2017024383 ◽

2017 ◽

Vol 19 (10) ◽

pp. 949-955 ◽

Cited By ~ 1

Author(s):

Tariq Saiff Ullah ◽

Syeda Sadiqa Firdous ◽

Ansar Mehmood ◽

Hamayun Shaheen ◽

Muhammad Ejaz Ul Islam Dar

Keyword(s):

Edible Mushrooms ◽

Western Himalayas ◽

Wild Edible Mushrooms ◽

Jammu And Kashmir

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Actualisation du catalogue des pteridophytes du Nord Ouest Algerien (region de Tlemcen). An update of the cheklist of pteridophytes from Nordwest Algeria (Tlemcen region)

Acta Botanica Malacitana ◽

10.24310/abm.v38i0.2638 ◽

2013 ◽

Vol 38 ◽

pp. 33-39 ◽

Cited By ~ 6

Author(s):

Boumediene Medjahdi ◽

Assia Ltreuch-Belarouci ◽

Rémy Prelli

Keyword(s):

Nous Avons ◽

Genetic Resources ◽

Threatened Species ◽

The Other ◽

Natural Distribution ◽

Ecological Characteristics ◽

Statutory Protection ◽

Ouest Algérien ◽

A Site ◽

Ressources Génétiques

Français. Un inventaire des ptéridophytes a été entrepris dans les forêts de la région de Tlemcen. L’inventaire de ces populations constitue une étape importante pour le développement des stratégies de conservation des ressources génétiques et de la diversité de ces populations sur l’ensemble de leur aire de distribution naturelle. Nous avons ainsi effectué le recensement et l’identification des fougères existantes dans la région de Tlemcen. Au total, plusieurs stations dont les caractéristiques écologiques diffèrent d’un site à un autre ont été prospectées, cela a permis l’identification de 26 taxons (dont 5 exceptionnellement rare). La création de réserves naturelles forestières renforcée par une protection réglementaire des espèces les plus menacées est nécessaire pour le maintien de ces communautés si particulières. English. An inventory of Pteridophyta was begun in the forests of the Tlemcen region. The inventory of these populations constitutes an important stage for the developement of the strategies of preservation of the genetic resources and the diversity of these populations on their whole area of natural distribution. We so made the inventory and the identification of the existing ferns in the region of Tlemcen. On the whole, several stations the ecological characteristics differ from a site in the other one were canvassed; they allowed the identification of 26 taxes (among which 5 exceptionally rare). The creation of forest nature reserves strengthened by a statutory protection of the most threatened species is necessary for the preservation of these particular communities.

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