کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424750 1619202 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Protozoan predation in soil slurries compromises determination of contaminant mineralization potential
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Protozoan predation in soil slurries compromises determination of contaminant mineralization potential
چکیده انگلیسی

Soil suspensions (slurries) are commonly used to estimate the potential of soil microbial communities to mineralize organic contaminants. The preparation of soil slurries disrupts soil structure, however, potentially affecting both the bacterial populations and their protozoan predators. We studied the importance of this “slurry effect” on mineralization of the herbicide 2-methyl-4-chlorophenoxyacetic acid (MCPA, 14C-labelled), focussing on the effects of protozoan predation. Mineralization of MCPA was studied in “intact” soil and soil slurries differing in soil:water ratio, both in the presence and absence of the protozoan activity inhibitor cycloheximide. Protozoan predation inhibited mineralization in dense slurry of subsoil (soil:water ratio 1:3), but only in the most dilute slurry of topsoil (soil:water ratio 1:100). Our results demonstrate that protozoan predation in soil slurries may compromise quantification of contaminant mineralization potential, especially when the initial density of degrader bacteria is low and their growth is controlled by predation during the incubation period.


► We studied the protozoan impact on MCPA mineralization in soil slurries.
► Cycloheximide was used as protozoan inhibitor.
► Protozoa inhibited MCPA mineralization in dilute topsoil slurry and subsoil slurry.
► Mineralization potentials may be underestimated when using soil slurries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 170, November 2012, Pages 32–38
نویسندگان
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