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Articles by Zafar Reshi
Total Records ( 2 ) for Zafar Reshi
  A.R. Dar , Zafar Reshi , G.H. Dar and Lubna Andleeb
  Five populations of Aquilegia nivalis were regularly surveyed during 2004-2006 for the study of phenological events, population size, recruitment and mortality of its individuals besides reproductive ecology. The study revealed that its perennating organs start sprouting in the first week of June, followed by flowering of individuals in the 3rd week of June and seed formation in the last week of September. Due to the herkogamous and dichogamous nature of its flowers, A. nivalis is an out-breeder. The number of individuals in its populations ranges from 2.87 ind./m2±0.12 to 10.28 ind./m2±0.57. Due to small size of its populations, very few (0.37 ind/m2±0.15 to 2.86 ind./m2±0.14) individuals reach the reproductive stage. Furthermore, 10.66%±4.19 to 18.72%±10.31 of individuals are damaged by herbivores in various populations. These factors limit the availability of compatible mates in the populations and contribute to low-insect visitation frequency (0.03±0.00 to 0.14±0.02; n=18), low pollen viability (46.50±1.93; n=3) and consequentially very low fruit (0%±0 to 70%±15.28) and seed set (0%±0 to 60.8%±15.85). All these factors, in conjunction with hostile habitat conditions and enhanced anthropogenic pressures, contribute to the present threat status of this endemic species.
  A.R. Dar , Zafar Reshi and G.H. Dar
  Seven spatially separate populations were studied in an attempt to identify and understand the bottlenecks that are responsible for the restricted occurrence and limited size of the existing populations of an endemic species, Meconopsis latifolia, in the Kashmir Himalaya, which is at the brink of extinction. Of the seven populations, only a few individuals in three populations flowered and produced seeds. Vegetative individuals predominated the populations. This skewed distribution of vegetative and reproductive individuals within populations was largely due to herbivory by rodents and cattle that prevented flowering. The surveyed populations showed variability in plant height (38.82±4.39 to 95.37±6.73 cm, p = 0.0001), rhizome length (11.8±0.66 to 27.56±3.74 cm, p = 0.007), number and dimensions of basal and upper leaves, the number of reproductive individuals (0.15 to 2.88 ind. m-2, p = 0.0001) and flower number (16.6±0.67 to 29.12±2.708, p = 0.0001). Breeding experiments confirmed the out-breeding nature of the species and only one insect species foraged and pollinated its flowers. The reproductive output, though relatively more in high elevational populations, was severely constrained by herbivory and pre-dispersal seed predation. Reduced population size, herbivory, reduced number of reproductive individuals, pre-dispersal seed predation and highly-specialized habitat requirements are the major restrictive factors responsible for the present critically endangered threatened status of this species.
 
 
 
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