e-journal

The importance of C, N and P as driver for bacterial community structure in German beech dominated forest soils

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Among several environmental factors shaping soil microbial communities the impact of soil nutrients
is of special interest. While continuous application mainly of N and P dramatically shifts
community composition during fertilization, it remains unclear whether this effect is consistent in
generic, unfertilized beech forest ecosystems of Germany, where differences in nutrient contents
are mostly a result of the parental material and climatic conditions. We postulate that in such ecosystems
nutrient effects are less pronounced due to the possibility of the soil microbiome to adapt
to the corresponding conditions over decades and the vegetation acts as the major driver. To test
this hypothesis, we investigated the bacterial community composition in five different German
beech dominated forest soils, representing a natural gradient of total- and easily available mineral-
P. A community fingerprinting approach was performed using terminal-Restriction Fragment
Length Polymorphism analysis of the 16S rRNA gene, while abundance of bacteria was measured
applying quantitative real-time PCR. Bacterial communities at the five forest sites were distinctly
separated, with strongest differences between the end-members of the P-gradient. However the
majority of identified microbial groups (43%) were present at all sites, forming a core microbiome
independent from the differences in soil chemical properties. Especially in the P-deficient soil the
abundance of unique bacterial groups was highly increased, indicating a special adaption of the
community to P limitation at this site. In this regard Correspondence Analysis elucidated that exclusively
soil pH significantly affected community composition at the investigated sites. In contrast
soil C, N and P contents did mainly affect the overall abundance of bacteria.

Key words: core microbiome / forest soil / nutrient content / diversity

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Ketersediaan

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Informasi Detail

Judul Seri

Journal Plant Nutrition Soil Science

No. Panggil

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Penerbit

London : WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim., 2016

Deskripsi Fisik

J. Plant Nutr. Soil Sci. 2016, 179, 472–480

Bahasa

English

ISBN/ISSN

10.1002/jpln.2016000

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2016, 179

Subjek

PERTANIAN.

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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