scholarly journals Community assembly, diversity patterns and distributions of broad-leaved forests in North China

2019 ◽  
Vol 43 (9) ◽  
pp. 732-741
Author(s):  
XU Jin-Shi ◽  
CHAI Yong-Fu ◽  
LIU Xiao ◽  
YUE Ming ◽  
GUO Yao-Xin ◽  
...  
Keyword(s):  
Community Assembly ◽  
North China ◽  
Diversity Patterns

Fine-scale diversity patterns in belowground microbial communities are consistent across kingdoms

2019 ◽  
Vol 95 (6) ◽  
Author(s):  
Anders Bjørnsgaard Aas ◽  
Carrie J Andrew ◽  
Rakel Blaalid ◽  
Unni Vik ◽  
Håvard Kauserud ◽  
...  
Keyword(s):  
Microbial Community ◽  
Spatial Structure ◽  
Community Assembly ◽  
High Throughput Sequencing ◽  
Spatial Scales ◽  
Microbial Community Composition ◽  
Diversity Patterns ◽  
Bistorta Vivipara ◽  
Adjacent Soil ◽  
Bacteria And Fungi

ABSTRACT The belowground environment is heterogeneous and complex at fine spatial scales. Physical structures, biotic components and abiotic conditions create a patchwork mosaic of potential niches for microbes. Questions remain about mechanisms and patterns of community assembly belowground, including: Do fungal and bacterial communities assemble differently? How do microbes reach the roots of host plants? Within a 4 m2 plot in alpine vegetation, high throughput sequencing of the 16S (bacteria) and ITS1 (fungal) ribosomal RNA genes was used to characterise microbial community composition in roots and adjacent soil of a viviparous host plant (Bistorta vivipara). At fine spatial scales, beta-diversity patterns in belowground bacterial and fungal communities were consistent, although compositional change was greater in bacteria than fungi. Spatial structure and distance-decay relationships were also similar for bacteria and fungi, with significant spatial structure detected at <50 cm among root- but not soil-associated microbes. Recruitment of root microbes from the soil community appeared limited at this sampling and sequencing depth. Possible explanations for this include recruitment from low-abundance populations of soil microbes, active recruitment from neighbouring plants and/or vertical transmission of symbionts to new clones, suggesting varied methods of microbial community assembly for viviparous plants. Our results suggest that even at relatively small spatial scales, deterministic processes play a significant role in belowground microbial community structure and assembly.

scholarly journals Local community assembly mechanisms shape soil bacterial β diversity patterns along a latitudinal gradient

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiao Zhang ◽  
Shirong Liu ◽  
Jingxin Wang ◽  
Yongtao Huang ◽  
Zachary Freedman ◽  
...  
Keyword(s):  
Community Assembly ◽  
Latitudinal Gradient ◽  
Local Community ◽  
Eastern China ◽  
Diversity Patterns ◽  
Geographical Patterns ◽  
Β Diversity ◽  
Species Pools ◽  
Regional Species Pool ◽  
Soil Bacterial

Abstract Biodiversity patterns across geographical gradients could result from regional species pool and local community assembly mechanisms. However, little has been done to separate the effects of local ecological mechanisms from variation in the regional species pools on bacterial diversity patterns. In this study, we compare assembly mechanisms of soil bacterial communities in 660 plots from 11 regions along a latitudinal gradient in eastern China with highly divergent species pools. Our results show that β diversity does not co-vary with γ diversity, and local community assembly mechanisms appear to explain variation in β diversity patterns after correcting for variation in regional species pools. The variation in environmental conditions along the latitudinal gradient accounts for the variation in β diversity through mediating the strength of heterogeneous selection. In conclusion, our study clearly illustrates the importance of local community assembly processes in shaping geographical patterns of soil bacterial β diversity.

Human disturbance rather than habitat factors drives plant community assembly and diversity patterns in a semiarid region

2020 ◽  
Vol 31 (14) ◽  
pp. 1803-1811
Author(s):  
Jinshi Xu ◽  
Han Dang ◽  
Tingting Tian ◽  
Shiqiang Liu ◽  
Yongfu Chai ◽  
...  
Keyword(s):  
Plant Community ◽  
Community Assembly ◽  
Human Disturbance ◽  
Semiarid Region ◽  
Diversity Patterns ◽  
Habitat Factors ◽  
Plant Community Assembly

scholarly journals Species distribution and community assembly rules of Juglans mandshurica in North China

2019 ◽  
Vol 43 (9) ◽  
pp. 753-761
Author(s):  
TANG Li-Li ◽  
ZHANG Mei ◽  
ZHAO Xiang-Lin ◽  
KANG Mu-Yi ◽  
LIU Hong-Yan ◽  
...  
Keyword(s):  
Species Distribution ◽  
Community Assembly ◽  
North China ◽  
Assembly Rules ◽  
Juglans Mandshurica

scholarly journals Bacterial Communities of Bartonella-Positive Fleas: Diversity and Community Assembly Patterns

2008 ◽  
Vol 74 (5) ◽  
pp. 1667-1670 ◽  
Author(s):  
Ryan T. Jones ◽  
Katherine F. McCormick ◽  
Andrew P. Martin
Keyword(s):  
Dna Sequencing ◽  
Dna Sequences ◽  
Community Assembly ◽  
Bacterial Communities ◽  
Universal Primers ◽  
Clone Libraries ◽  
Diversity Patterns ◽  
Oropsylla Hirsuta ◽  
Oropsylla Montana

ABSTRACT We investigated the bacterial communities of nine Bartonella-positive fleas (n = 6 Oropsylla hirsuta fleas and n = 3 Oropsylla montana fleas), using universal primers, clone libraries, and DNA sequencing. DNA sequences were used to classify bacteria detected in a phylogenetic context, to explore community assembly patterns within individual fleas, and to survey diversity patterns in dominant lineages.

scholarly journals Mechanisms of community assembly explaining beta‐diversity patterns across biogeographic regions

2021 ◽  
Author(s):  
Miguel Muñoz Mazón ◽  
J. Sebastián Tello ◽  
Manuel J. Macía ◽  
Jonathan A. Myers ◽  
Peter M. Jørgensen ◽  
...  
Keyword(s):  
Community Assembly ◽  
Beta Diversity ◽  
Diversity Patterns ◽  
Biogeographic Regions

scholarly journals Analyzing snapshot diversity patterns with the Neutral Theory can show functional groups’ effects on community assembly

Ecology ◽  
2020 ◽  
Vol 101 (4) ◽  
Author(s):  
Fabien Laroche ◽  
Cyrille Violle ◽  
Adrien Taudière ◽  
François Munoz
Keyword(s):  
Functional Groups ◽  
Community Assembly ◽  
Neutral Theory ◽  
Diversity Patterns

scholarly journals Exploring the potential of metabarcoding to disentangle macroinvertebrate community dynamics in intermittent streams

2020 ◽  
Vol 4 ◽  
Author(s):  
Alex Laini ◽  
Arne J. Beermann ◽  
Rossano Bolpagni ◽  
Gemma Burgazzi ◽  
Vasco Elbrecht ◽  
...  
Keyword(s):  
Community Assembly ◽  
Beta Diversity ◽  
Community Dynamics ◽  
Macroinvertebrate Community ◽  
Taxonomic Resolution ◽  
Accurate Information ◽  
Morphological Identification ◽  
Intermittent Streams ◽  
Diversity Patterns ◽  
Taxonomic Sufficiency

Taxonomic sufficiency represents the level of taxonomic detail needed to detect ecological patterns to a level that match the requirement of a study. Most bioassessments apply the taxonomic sufficiency concept and assign specimens to the family or genus level given time constraints and the difficulty to correctly identify species. This holds particularly true for stream invertebrates because small and morphologically similar larvae are hard to distinguish. Low taxonomic resolution may hinder detecting true community dynamics, which thus leads to incorrect inferences about community assembly processes. DNA metabarcoding is a new, affordable and cost-effective tool for the identification of multiple species from bulk samples of organisms. As it provides high taxonomic resolution, it can be used to compare results obtained from different identification levels. Measuring the effect of taxonomic resolution on the detection of community dynamics is especially interesting in extreme ecosystems like intermittent streams to test if species at intermittent sites are subsets of those from perennial sources or if independently recruiting taxa exist. Here we aimed to compare the performance of morphological identification and metabarcoding to detect macroinvertebrate community dynamics in the Trebbia River (Italy). Macroinvertebrates were collected from four perennial and two intermittent sites two months after flow resumption and before the next dry phase. The identification level ranged from family to haplotype. Metabarcoding and morphological identifications found similar alpha diversity patterns when looking at family and mixed taxonomic levels. Increasing taxonomic resolution with metabarcoding revealed a strong partitioning of beta diversity in nestedness and turnover components. At flow resumption, beta diversity at intermittent sites was dominated by nestedness when family-level information was employed, while turnover was evidenced as the most important component when using Operational Taxonomic Units (OTUs) or haplotypes. The increased taxonomic resolution with metabarcoding allowed us to detect species adapted to deal with intermittency, like the chironomid Cricotopus bicinctus and the ephemeropteran Cloeon dipterum. Our study thus shows that family and mixed taxonomic level are not sufficient to detect all aspects of macroinvertebrate community dynamics. High taxonomic resolution is especially important for intermittent streams where accurate information about species-specific habitat preference is needed to interpret diversity patterns induced by drying and the nestedness/turnover components of beta diversity are of interest to understand community assembly processes.

Sign in / Sign up

Export Citation Format

Share Document