کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6297644 1617776 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of short term variation in temperature and water content on the bacterial community in a tropical soil
ترجمه فارسی عنوان
اثر تغییرات کوتاه مدت در درجه حرارت و محتوای آب بر روی جمعیت باکتری در خاک گرمسیری
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
The community dynamics of environmental bacteria is dependent on micro-climatic factors such as temperature and water potentials. A shift in any one of these factors can have a major impact on the richness and composition of the microbes in the soil. However, microbial responses towards these climate stressors are poorly characterised. Here, we undertook a microcosm study to assess the effect of temperature and water content on the bacterial community structure in a tropical soil over a four week period. The microcosms were incubated at three different temperatures (25 °C, 30 °C, and 35 °C) and maintained under two different water levels (2 and 5 mL). Using a combination of molecular assessment tools and numerical inference, we showed that short-term variation in both temperature and water content induced significant changes to the soil bacterial community composition. The greatest difference in community structure between treatments was observed in the Week 2 microcosms, but in the Week 4 microcosms, the community structure between treatments became more similar. Compared to temperature, water content exerted a greater effect on the bacterial diversity. Firmicutes was the most abundant phylum in all the analysed samples, and its relative abundance increased with elevation in temperature and water content. Out of six functional genes analysed, the nitrogen fixation gene (nifH) and denitrification gene (nosZ) showed significant correlations to the bacterial community structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 107, November 2016, Pages 279-289
نویسندگان
, , , ,