Musharaf Khan, Farrukh Hussain , and Shahana Musharaf, from the different
institute of the Pakistan. wrote a research article about, Conservation Status
of Tree Species in Tehsil Takht-e-Nasrati, Karak, Pakistan. entitled, Conservation
Status of Tree species in Tehsil Takht-e-Nasrati, Karak Pakistan.This research
paper published by the Journal of Biodiversity and Environmental Sciences(JBES). an open access scholarly research journal on Biodiversity. under
the affiliation of the International Network For Natural Sciences |
NNSpub. an open access multidisciplinary research journal publisher.
Abstract
The present study
documents the conservation status of 21 trees belonging to 14 families on small
scale in Tehsil Takht-e-Nasrati, Karak through field surveys, frequently
conducted in spring, summer and winter 2009-2010. Among these 9 species were
found to be rare, vulnerable (6 species), Infrequent (3 species), endangered
(one specie) and dominant (2 species). The conservation status of plants is
determined according to IUCN 2001, Red Data List Categories and Criteria. After
two years extensive field studies on the basis of questioner including
availability of plant, collection of plant, growth of plant, plant parts,
population size, geographic range and habitat we have concluded that Salvadora
oleoides is endangered (EN) specie.
Introduction
The conservation status
of organisms indicates whether the group is still extant or not and if yes, how
likely the group is to become extant in the near future. Conservation status of
a species depends upon many factors like grazing, fuel demand, agriculture
land, deforestation, breeding success rates and known threats (Khan, et al.,
2011). Based on the sample of species that have been evaluated through 2006,
the percentage of endangered species as 40 percent of all organisms has
calculated by the International Union for Conservation of Nature (IUCN) (Anon.,
2008). Habitat loss and degradation, introduction of alien species, pollution
and diseases, over-exploitation and climate change are some threats facing by
plants which are an integral part of our ecosystem because native plants are
key components of the global biological diversity (Sudhersan et al., 2003). It
is estimated that some 270,000-425,000 vascular plant species are already known
(Govaerts, 2001) with perhaps a further 10- 20% still to be discovered and
described (Hawksworth & Kalin-Arroyo, 1995). Pakistan’s scenario is not
different from the rest of the world. Plant biodiversity is also under
tremendous pressure due to its population explosion, unplanned urbanization,
deforestation and over-exploitation of natural resources. Unfortunately, very
little work has been done on threatened plants of Pakistan and extremely
limited information is available on this subject (Alam & Ali, 2009).
According to Nasir (1991) 580-650 flowering plant species (i.e. 12%) are
expected to be threatened. Chaudhri & Qureshi (1991) reported 709 taxa as
threatened plants from Pakistan. However, both these studies are manly based on
field observation and literature without any support of quantitative data. In
contrast, the recent red list of IUCN (Anon., 2008) only 19 flowering plants species
has been listed from Pakistan. Regarding Pakistan previous workers have
classified the plant species as threatened or rare on the basis of literature
or herbarium specimen. No work has been done according to IUCN red list
categories or criteria (Anon., 2001) except Alam & Ali (2009), who
classified Astragalus gilgitensis as a Critically Endangered (CR).
The Tehsil Takht-e-
Nasrati is situated at o to 33.280 North and 70.300 to 71.300 East. The
research area is bounded by Tehsil Karak on the North East, District Mianwali
on the East, District Lakki Marwat on the South West and Tribal area Adjoining
District Bannu on the West (Fig. 1). The total area of Tehsil is about 613.66
Sq. kilometers. Majority of the area consists of rigged dry hills and rough fields
areas i.e. 323.97 Sq. kilometers and agriculture land is about 289.7 Sq.
kilometers. The area is situated at 340 m above the sea level. The major
problem of the area is shortage of drinking water and over grazing (Fig.2). The
people bring drinking water from the remote area (Fig.3). In the year 2001 -
2010, 121.6mm of rainfall per 10 year recorded. The area is very hot in summer
and very cold in winter. June and July are the hottest months, whereas December
and January are the coldest months. In the year 2001 - 2010 the mean maximum
temperature was 39.5o C, in the month of the June, where as the mean minimum
temperature was as low as 4.26o C, in the month of January (Table.1). Write
down the aim and necessity of your study here.
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