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PHYTOSOCIOLOGICAL STUDIES OF DIVERSE AREAS RANGING FROM HARNI, SINJAWI TO DUKI REGIONS

Tareen, Rasool Bakhsh (1989) PHYTOSOCIOLOGICAL STUDIES OF DIVERSE AREAS RANGING FROM HARNI, SINJAWI TO DUKI REGIONS. PhD thesis, University of Balochistan, Quetta.

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Abstract

Vegetation of hills, plains and water courses of the diverse areas ranging from Harnai, Sinjawi to Duki regions were studied by point centered quarter method ( Cotton and Curtis, 1959 ). Plant communities were classified on the basis of index of similarity ( Bray & Curtis, 1957 ). Out of 111 stands, 102 communities on the hills, 21 communities in the plains and 31 communities in the water courses. These communities were further grouped on altitudinal basis into four different ecological zones i.e. lower zone, lower middle zone, upper middle zone and upper zone. The composition of vegetation at different altitudes were described. Plant communities of the hills, plains and water courses having first dominant common, were further grouped into different association types. The communities of hills were found to have high stand density and stand cover followed by plains and water courses. Both species diversity and vegetational diversity were found to be high on the hills followed by water courses and plains. High species diversity appears to be associated with soil having high maximum water holding capacity, organic matter and fine texture. Certain communities of protected areas have also indicated high species diversity, and high coverage. The maturity and homogeneity of all the communities of hills, plains and water courses were generally found to be low. The density size class structure of the communities of hills, plains and water courses revealed that in the trees and shrubs stratum, Olea ferrugines reproducing well in the communities of the hills, plains and water courses. Caragana ambigua and Prunus brahuica shows very well regeneration in the communities of hills and plains. Juniperus polycarpos, Pistacia, Cotoneaster nummularia, Acaciamodesta, Abelia triflora and Caragana ulcina reproducing well in the communities of hills, and Fraxinus xanthoxyloides and Nannorhops ritchieana shows very well regeneration in the communities of water courses. In the herbs and under shrubs stratum Cymbopogon jawarancusa is reproducing very well in the communities of hills, plains and water courses. Convolvulus spinsus, Thymus serpyllum and Chrysopogon aucheri are reproducing well in the communities of hills and plains. Eulaliopsis binata, Alopecurus arundinaceus, Plectranthus rugosus and Dichanthium foveolatum are reproducing well in the communities of hills. Artemisia stricta shows well regeneration in the communities of plains. Saccharum ravennage, Perovskia abrotanoides, Saccharum bengalense, Salvia nubicola, Pennisetum orientale and Arundo donax were reproducing very well in the communities of water courses and appear to be very promising species for further. Among topographic factors, aspects seems to play an important role in the distribution of communities of hills. Similarly, wet water courses had Saccharum bengalense, Arudo donax, Cotoneaster nummularia, Dalbergia sissoo, etc as the dominant species. Among the dry water courses, the dominant species differed in narrow, medium and wide water courses. The vegetation in sloping plains and flat plains also showed significant difference. Life form and leaf size spectra of the communities of the study areas were constructed according to Runkiaer ( 1905 & 1934 ). Hemicrytophytes, Therophytes and Chamaephytes were found to be significantly higher and Geophytes were found to be significantly lower than the “Normal spectrumÃÂÃÃÃÃ

Item Type:Thesis (PhD)
Uncontrolled Keywords:Phytosociological studies, Plant communities, Vegetation, Harnai, Sinjawi, Duki, Cottom, Curtis, Plant communities, Lower zone, Lower middle zone, Upper middle zone, Upper zone, Vegetational diversity, Water holding capacity, Olea ferruginea, Caragana ambigua, Prunus brahuica, Juniperus, Polycarpos, Pistacia mutica, Cotoneaster nummularia, Acacia modesta, Abelia triflora, Caragana ulcina, Fraxinus xanthoxyloides, Nannorhops ritchieana, Cymbopogon, Jawarancusa , Convolvulus spinsus, Thymus serpyllum, Chrysopogon, Aucheri, Eulaiopsis binata, Alopecurus arundinaceus, Plectranthus rugosus, Dichanthium foveolatum, Artemisia stricta, Saccharum ravennae, Perovskia abrotanoides, Saccharum bengalense, Salvia nubicola, Pennisetum orientale, Arundo donax, Saccharum bengalense, Arundo donax, Cotoneaster nummularia, Dalbergia sissoo, Microphyll, Nannophylls, Leptophylls,
Subjects:Biological & Medical Sciences (c) > Biological Sciences(c1) > Paleo-botany(c1.9)
ID Code:263
Deposited By:Mr Ghulam Murtaza
Deposited On:16 Jun 2006
Last Modified:04 Oct 2007 21:00

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