Spatial Distribution and Population Structure of Himalayan Fir (<i>Abies pindrow</i> (Royle ex D.Don) Royle) in Moist Temperate Forests of the Kashmir Region

oleh: Nuzhat Mir Alam, Hamayun Shaheen, Muhammad Manzoor, Tan Tinghong, Muhammad Arfan, Muhammad Idrees

Format: Article
Diterbitkan: MDPI AG 2023-02-01

Deskripsi

<i>Abies pindrow</i> is a keystone tree species of temperate forests in the Himalayan range with immense ecological significance. The current study was designed to investigate the spatial distribution, population structure, associated flora, and sustainability of <i>Abies pindrow</i> in the temperate forests of Azad Jammu and Kashmir (AJK), Pakistan. Vegetation data were collected from 48 forest sites distributed in six districts of AJK with respect to the geography, microclimates, and vegetation structure by employing a systematic quadrate-based methodology. <i>Abies pindrow</i> populations were characterized by an average stem density of 183.9 trees/ha with an average basal area cover of 789 cm. <i>A. pindrow</i> populations showed a regeneration value of 555.6 seedlings/ha. A digital elevation model revealed that <i>A. pindrow</i> exhibited a large extent of distribution in an altitudinal range of 1800–3400 m. GIS analysis identified that north-facing slopes with a moderate degree of slope steepness constitutes the preferred habitat of the species in the Kashmir mountains. A floristic analysis revealed that a total of 282 species from 74 plant families comprised the associated flora of <i>A. pindrow</i>-dominated forests with <i>Pinus wallichiana</i>, <i>Picea smithiana</i>, <i>Aesculus indica</i>, and <i>Viburnum grandiflorum</i> as codominant companion species. <i>A. pindrow</i> forests exhibited significant levels of species diversity and richness with average values of Simpson’s diversity as 0.94, Shannon’s diversity as 3.09, species richness as 1.45, and maturity index value as 45.9%. The <i>A. pindrow</i> populations in the study area were found to be subjected to significant deforestation pressure along with overgrazing and erosion impacts. Results provide valuable scientific information for the conservation management of <i>A. pindrow</i> populations, ensuring the sustainability of temperate forest ecosystems in the Western Himalayan region of Kashmir.