ABSTRACT
It is considered that agrobiodiversity as a vital component for human food security is increasingly eroding and so making more attention to this section of biodiversity is necessary. This study was conducted in a protected area located in Kermanshah, Iran, in order to infer biodiversity characteristics and the effect of biophysical and ecological factors on it. Ten villages were selected randomly and the information was gathered through interviewing 25 to 30 percent of the household heads and visiting the area too. The mean Species richness for agricultural species of the villages was 2.31. Shannon-Weiner Index was in the range of 1.06 to 2.56 and it was associated with other biodiversity indices, calculated in this study. Comparing the biodiversity indices indicated that generally being in a protected area can be useful to protect agricultural biodiversity. Cultivated land area, annual precipitation and altitude were some factors having significant effects on Species richness of agricultural plants in this study.
ABSTRACT
The present study concerns seasonal variations, correlation coefficient and biodiversity indices of zooplanktons during January – December, 2008 in the Harsool-Savangi dam, Aurangabad, India. A total of 25 genera were recorded of which 10 were Rotifers, 8 Cladocerons, 5 Copepods and 2 Ostracods. Present study revealed maximum percentage wise compositions of Rotifers at north site were 58.28%, Cladocerons at south site were 29.78%, Copepods at east site were 16.59% and Ostracods at south site were 4.20%, respectively. Minimum percentage wise compositions Rotifers at south site were 51.54%, Cladocerons at west site were 26.71%, Copepods at north site were 11.03% and Ostracods at north site were 1.36%, respectively. Margalef’s index (R1) and Menhinick index (R2) values (3.58 and 0.87) were found to be the highest at south site and lowest at (3.16 and 0.56) north site. Simpson’s index (l) values (0.43) were found to be the highest at north site and lowest (0.37) at south site. Shannon – Weiner index (H’) values (1.06) were found to be the highest at south site and lowest values (0.94) at north site. Maximum species evenness was recorded at south site while minimum species evenness was recorded at north site. Maximum population density of Rotifers, Cladocerons, Copepods and Ostracods (799, 350, 163 and 18) were recorded at north site in summer and minimum (58, 35, 22 and 13) were recorded at south site in monsoon, respectively.
ABSTRACT
The present study concerns seasonal variations, correlation coefficient and biodiversity indices of phytoplankton during January to December, 2008 in the Harsool-Savangi dam, Aurangabad, India. A total of 35 genera were recorded out of which 15 were Chlorophyceae, 7 Bacillariophyceae, 7 Cyanophyceae and 6 Euglenophyceae. Present study revealed maximum percentage wise compositions of Chlorophyceae at north site 41.91%, Bacillariophyceae at west site 32.70%, Cyanophyceae at south site 19.50% and Euglenophyceae at west site 11.47%. Minimum percentage wise compositions Chlorophyceae at south site 37.80%, Bacillariophyceae at east site 28.15%, Cyanophyceae at west site 17.47% and Euglenophyceae at north site 10.57%. Margalef’s index (R1) and Menhinick index (R2) values (4.12 and 0.56) were found to be highest at south site and lowest values (3.77 and 0.38) were found at north site. Simpson’s index (I) values (0.30) were found to be the highest at north site and lowest values (0.29) were found at south, east, and west sites. Shannon – Weiner index (H’) values (1.26) were found to be the highest at south, east, and west sites and lowest values (1.24) were found at north site. Maximum species evenness was recorded at south site; minimum at north site. Maximum population density of Chlorophyceae, Bacillariophyceae, Cyanophyceae and Euglenophyceae (1923, 1173, 889 and 541 organisms l-1) were recorded at north site in summer and minimum (108, 195, 67 and 24 organisms l-1) were recorded at south site in monsoon, respectively.