Bacterial communities in soil mimic patterns of vegetative succession and ecosystem climax but are resilient to change between seasons |
| |
| Institution: | 1. College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China;2. The Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling 712100, Shaanxi, China;3. College of Forestry, Northwest A&F University, Yangling, 712100, Shaanxi, China;4. College of Urban and Environmental Science, Northwest University, Xi''an 710000, Shaanxi, China;1. W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Kraków, Poland;2. Institute of Botany, Faculty of Biology, Jagiellonian University, Gronostajowa 3, 30-387 Kraków, Poland;3. Department of Environmental Zoology, Institute of Animal Sciences, Agricultural University, Al. Mickiewicza 24/28, 30-059 Kraków, Poland;4. Institute of Biology, Pedagogical University of Kraków, Podchorążych 2, 31-054 Kraków, Poland;5. Department of Ecology, Protection and Shaping of Environment, West Pomeranian University of Technology, Słowackiego 17, 71-434 Szczecin, Poland;1. University of Florida, Range Cattle Research and Education Center, 3401 Experiment Station, Ona, FL 33865, USA;2. University of Florida, Soil and Water Science Department, 2185 McCarty Hall A, Gainesville, FL 32611, USA;3. University of Florida, Agronomy Department, Gainesville, FL 32611, USA. |
| |
| Abstract: | Organism succession during ecosystem development has been researched for aboveground plant communities, however, the associated patterns of change in below-ground microbial communities are less described. In 2008, a study was initiated along a developmental sand-dune soil chronosequence bordering northern Lake Michigan near Wilderness Park (WP). It was hypothesized that soil bacterial communities would follow a pattern of change that is associated with soil, plant, and ecosystem development. This study included 5 replicate sites along 9 soils (n = 45) ranging in age from ∼105 to 4010 years since deposition. Soil bacterial community composition and diversity were studied using bacterial tag-encoded FLX amplicon pyrosequencing of the 16S rRNA gene. Bray–Curtis ordination indicated that bacterial community assembly changed along the developmental soil and plant gradient. The changes were not affected by seasonal differences, despite likely differences in plant root C (e.g. exudates), temperature, and water availability in soil. Soil base cations (Ca, Mg) and pH declined, showing log-linear correlations with soil age (r ∼ 0.83, 0.84 and 0.81; P < 0.01). Bacterial diversity (Simpson's 1/D) declined rapidly during the initial stages of soil development (∼105–450 y) and thereafter (>450 y) did not change. Turnover of plant taxa was also more rapid early during ecosystem development and correlated with bacterial community structural change (P < 0.000001; r = 0.56). It is hypothesized that plants help to drive pedogenic change during early (<450 y) soil development (e.g. pH decline, cation leaching) which drive selection of soil bacterial communities. In mature soils (∼450–4000 y), resilient and stable soil bacterial community structures developed, mimicking steady-state climax communities that were observed during latter stages of primary plant succession. These relationships point to possible feedbacks between plant and bacterial communities during ecosystem development. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
