%0 Journal Article
%T Signature of Anthropogenic Impacts in Detritus Decomposition and the Freshwater Snail Melanopsis buccinoidea
%A Sukran Yal£¿£¿n Ozdilek
%J -
%D 2018
%X The present study aims to investigate the anthropogenic impacts of crop farming, fertilizing practices, and pesticide use in riparian zones on detritus decomposition and on feeding of Melanopsis buccinoidea (Olivier, 1801) on detritus by employing the stable isotope method. For this purpose, (1) Non-treated, (2) fertilizer-treated and (3) pesticide-treated apple Malus pumila (Mill) and corn (Zea mays L.) leaves were used in duplicate as detritus material and left to decompose for about two and a half months. During the experiment, samples were collected from the detritus every ten days to conduct stable carbon and nitrogen analyses., M. buccinoidea individuals were then placed in the media containing different detritus types treatments for 25 days and the stable carbon and isotope values in the muscle tissues of M. buccinoidea were measured periodically. The ¦Ä13C values measured in the apple and corn leaves over a period of two and a half months were found to fluctuate and increased in each of the three treatments depending on the time of exposure and only in the fertilizer-treated corn leaves. The ¦Ä15N values of detrita in both plants were observed to have increased in the natural/non-treated and pesticide-treated conditions but decreased in the fertilizer-administered media during two and a half months. Conductivity and pH values in both plants were found to be high and low, respectively. In this medium, ¦Ä15N ratios were lower. The ¦Ä13C values of the M. buccinoidea kept in the corn detritus were found to be lower than those of the individuals kept in the apple detritus. It was remarkable to observe during the 25-day experiment that the ¦Ä13C values of the M. buccinoidea kept in the corn detritus tended to decrease
%K Makroomurgas£¿z
%K Kararl£¿ £¿zotoplar
%K Antropojenik Etki
%K Akuatik ekoloji
%U http://dergipark.org.tr/jmsf/issue/41646/486703