Nematode community structure and trophic group composition of fresh water nematodes from Sindh, Pakistan
Nematode community structure and trophic group composition of fresh water nematodes from Sindh, Pakistan
K. Nasira† and S. Shamim
ABSTRACT
Present study provides the information and estimation on fresh water nematode community structure from various
water sources (river, lakes, canals, ponds, reservoirs and irrigation sources: tube well and tanks) and evaluation of
feeding categories at eight collecting sites of Sindh. After analysis it was found that different parameters of
community structure of fresh water nematodes varied considerably at different surveyed sites. Nematode community
analysis revealed that frequency (absolute frequency, relative frequency), density (relative density) and prominence
value were variable for nematode population within localities. Relative density of fresh water nematode species of
studied sites ranged between 0.7-10.4 % while absolute frequency and relative frequency ranged between 15-98%
and 0.86-8.8%, respectively. Analysis of overall occurrence percentage of feeding groups revealed that predators
dominated the entire nematode community (35%) followed by bacterivores (32.5%), herbivores (20%), algal feeders
and fungivores shared the same occurrence percentage (5%) while the least occurrence percentage was of omnivores
(2.5%). These studies add to the knowledge of diversity of fresh water nematodes and evidence on their
categorization of the basis of feeding habits and the community structure.
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June 2018
Pakistan Journal of Nematology, Vol. 36, Iss. 1, Pages 1-115
