scholarly journals Rhizosphere bacterial community composition depends on plant diversity legacy in soil and plant species identity

2018 ◽  
Author(s):  
Marc W. Schmid ◽  
Terhi Hahl ◽  
Sofia J. van Moorsel ◽  
Cameron Wagg ◽  
Gerlinde B. De Deyn ◽  
...  
Keyword(s):  
Species Diversity ◽  
Microbial Communities ◽  
Community Composition ◽  
Plant Species ◽  
Plant Diversity ◽  
Bacterial Communities ◽  
Biodiversity Loss ◽  
Plant Species Diversity ◽  
Species Identity ◽  
Soil Biodiversity

AbstractSoil microbes are known to be involved in a number of essential ecosystem processes such as nutrient cycling, plant productivity and the maintenance of plant species diversity. However, how plant species diversity and identity affect soil microbial diversity and community composition is largely unknown. We tested whether, over the course of 11 years, distinct soil bacterial communities developed under plant monocultures and mixtures, and if over this timeframe plants with a monoculture or mixture history changed in the microbial communities they associated with. For eight species, we grew offspring of plants that had been grown for 11 years in the same monocultures or mixtures (monoculture- or mixture-type plants) in pots inoculated with microbes extracted from the monoculture and mixture soils. After five months of growth in the glasshouse, we collected rhizosphere soil from each plant and used 16S-rRNA gene sequencing to determine the community composition and diversity of the bacterial communities. Microbial community structure in the plant rhizosphere was primarily determined by soil legacy (monoculture vs. mixture soil) and by plant species identity, but not by plant legacy (monoculture- vs. mixture-type plants). In seven out of the eight plant species bacterial abundance was larger when inoculated with microbes from mixture soil. We conclude that plant diversity can strongly affect belowground community composition and diversity, feeding back to the assemblage of rhizosphere microbial communities in newly establishing plants. Thereby our work demonstrates that concerns for plant biodiversity loss are also concerns for soil biodiversity loss.

scholarly journals Rhizobacterial communities of five co-occurring desert halophytes

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5508 ◽  
Author(s):  
Yan Li ◽  
Yan Kong ◽  
Dexiong Teng ◽  
Xueni Zhang ◽  
Xuemin He ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Plant Species ◽  
Bacterial Communities ◽  
Bacterial Community Composition ◽  
Community Diversity ◽  
Species Identity ◽  
Halostachys Caspica ◽  
Lycium Ruthenicum ◽  
Limonium Gmelinii

BackgroundRecently, researches have begun to investigate the microbial communities associated with halophytes. Both rhizobacterial community composition and the environmental drivers of community assembly have been addressed. However, few studies have explored the structure of rhizobacterial communities associated with halophytic plants that are co-occurring in arid, salinized areas.MethodsFive halophytes were selected for study: these co-occurred in saline soils in the Ebinur Lake Nature Reserve, located at the western margin of the Gurbantunggut Desert of Northwestern China. Halophyte-associated bacterial communities were sampled, and the bacterial 16S rDNA V3–V4 region amplified and sequenced using the Illumina Miseq platform. The bacterial community diversity and structure were compared between the rhizosphere and bulk soils, as well as among the rhizosphere samples. The effects of plant species identity and soil properties on the bacterial communities were also analyzed.ResultsSignificant differences were observed between the rhizosphere and bulk soil bacterial communities. Diversity was higher in the rhizosphere than in the bulk soils. Abundant taxonomic groups (from phylum to genus) in the rhizosphere were much more diverse than in bulk soils. Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes and Planctomycetes were the most abundant phyla in the rhizosphere, while Proteobacteria and Firmicutes were common in bulk soils. Overall, the bacterial community composition were not significantly differentiated between the bulk soils of the five plants, but community diversity and structure differed significantly in the rhizosphere. The diversity ofHalostachys caspica,Halocnemum strobilaceumandKalidium foliatumassociated bacterial communities was lower than that ofLimonium gmeliniiandLycium ruthenicumcommunities. Furthermore, the composition of the bacterial communities ofHalostachys caspicaandHalocnemum strobilaceumwas very different from those ofLimonium gmeliniiandLycium ruthenicum. The diversity and community structure were influenced by soil EC, pH and nutrient content (TOC, SOM, TON and AP); of these, the effects of EC on bacterial community composition were less important than those of soil nutrients.DiscussionHalophytic plant species played an important role in shaping associated rhizosphere bacterial communities. When salinity levels were constant, soil nutrients emerged as key factors structuring bacterial communities, while EC played only a minor role. Pairwise differences among the rhizobacterial communities associated with different plant species were not significant, despite some evidence of differentiation. Further studies involving more halophyte species, and individuals per species, are necessary to elucidate plant species identity effects on the rhizosphere for co-occurring halophytes.

Plant species diversity, ecosystem function, and pasture Management—A perspective

2007 ◽  
Vol 87 (3) ◽  
pp. 479-487 ◽  
Author(s):  
M. A. Sanderson ◽  
S. C. Goslee ◽  
K. J. Soder ◽  
R. H. Skinner ◽  
B. F. Tracy ◽  
...  
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Plant Diversity ◽  
Ecosystem Function ◽  
Plant Species Diversity ◽  
Forage Yield ◽  
Forage Production ◽  
Pasture Management ◽  
Forage Species ◽  
Grazing Ecosystem

Grassland farmers face many challenges in pasture management including improving sustainability, reducing inputs of fertilizers and pesticides, and protecting soil resources. In this paper we provide our perspective on managing plant diversity within and among pastures as one tool to aid producers in meeting these challenges. Pasture ecosystems can be highly diverse, with a complex array of organisms contributing to ecosystem functioning. Within the broad range of plant and animal biodiversity in pastures, plant species diversity may be the most amenable to manipulation or management. Reported benefits of plant diversity in grasslands include: increased forage production, greater ecosystem stability in response to disturbance, and reduced invasion by exotic species such as weeds. Some view diversity as a sort of insurance policy where different species contribute in their own time or can take the place of species that fail from stress or mismanagement. Using mixtures of several forages in pastures, in some instances, can improve forage yield and reduce weed invasions. Pasture management for increased plant species diversity, however, is not simply mixing and planting as many forage species as possible. The kinds and amounts of different forage species along with their arrangement within and among pastures at the farm scale are critical features that must be considered. Tools must be developed to determine the appropriate species mixtures for varying soils, landscapes, climate and purposes to fulfill multiple functions for producers. Key words: Grazing ecosystem; forages; diversity; ecosystem function; ecosystem services

scholarly journals Restoring plant species diversity and community composition in a ponderosa pine-bunchgrass ecosystem

Plant Ecology ◽  
2007 ◽  
Vol 197 (1) ◽  
pp. 139-151 ◽  
Author(s):  
Daniel C. Laughlin ◽  
Jonathan D. Bakker ◽  
Mark L. Daniels ◽  
Margaret M. Moore ◽  
Cheryl A. Casey ◽  
...  
Keyword(s):  
Species Diversity ◽  
Community Composition ◽  
Plant Species ◽  
Ponderosa Pine ◽  
Plant Species Diversity

scholarly journals Spatial Diversity in Bacterial Communities across Barren and Vegetated, Native and Invasive, Coastal Dune Microhabitats

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 525
Author(s):  
Brianna L. Boss ◽  
Bianca R. Charbonneau ◽  
Javier A. Izquierdo
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Community Composition ◽  
Plant Species ◽  
Bacterial Communities ◽  
Environmental Gradients ◽  
Microbial Community Composition ◽  
Soil Microbial Communities ◽  
Spatial Diversity ◽  
Microbial Composition

The microbial community composition of coastal dunes can vary across environmental gradients, with the potential to impact erosion and deposition processes. In coastal foredunes, invasive plant species establishment can create and alter environmental gradients, thereby altering microbial communities and other ecogeomorphic processes with implications for storm response and management and conservation efforts. However, the mechanisms of these processes are poorly understood. To understand how changing microbial communities can alter these ecogeomorphic dynamics, one must first understand how soil microbial communities vary as a result of invasion. Towards this goal, bacterial communities were assessed spatially along foredune microhabitats, specifically in barren foredune toe and blowout microhabitats and in surrounding vegetated monocultures of native Ammophila breviligulata and invasive Carex kobomugi. Across dune microhabitats, microbial composition was more dissimilar in barren dune toe and blowout microhabitats than among the two plant species, but it did not appear that it would favor the establishment of one plant species over the other. However, the subtle differences between the microbial community composition of two species could ultimately aid in the success of the invasive species by reducing the proportions of bacterial genera associated exclusively with A. breviligulata. These results suggest that arrival time may be crucial in fostering microbiomes that would further the continued establishment and spread of either plant species.

Unravelling the effects of plant species diversity and aboveground litter input on soil bacterial communities

Geoderma ◽  
2018 ◽  
Vol 317 ◽  
pp. 1-7 ◽  
Author(s):  
Julie Leloup ◽  
Mathilde Baude ◽  
Naoise Nunan ◽  
Jacques Meriguet ◽  
Isabelle Dajoz ◽  
...  
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Bacterial Communities ◽  
Plant Species Diversity ◽  
Litter Input ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Aboveground Litter

scholarly journals PLANT DIVERSITY IN HOMEGARDENS AND THEIR USE VALUE IN TWO VILLAGES OF RUPANDEHI DISTRICT, WESTERN NEPAL

2013 ◽  
Vol 18 ◽  
pp. 85-90
Author(s):  
Okmaya Srish ◽  
Chandra P. Pokhrel ◽  
Ram Kailash P. Yadav
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Significant Role ◽  
Plant Diversity ◽  
Plant Species Diversity ◽  
Cultivated Plants ◽  
Use Value ◽  
Rural People ◽  
Self Sufficiency ◽  
Use Values

Homegardens play significant role in the livelihood of the rural people. The cultivation of different plants in homegardens for self-sufficiency has a long tradition worldwide, but knowledge about homegardens in Nepal is meager. To analyse this more deeply, cultivated plants of 15 homegardens were surveyed in two Village Development Committees (VDCs) in Tarai of Westren Nepal, viz. Anandavan and Karahiya VDCs. This study mainly focuses on the plant species diversity and their use values. Mostly perennial plants were included in the study. The plant studied in the homegardens included those which are used as fruits, fodder, medicine, nut and others. In Total, 31 plant species were found in the studied homegardens. Species diversity in the home gardens of Anandavan VDC was higher (H’=2.45) than that of Karhiya VDC (H’=2.19). The evenness of species, however, was not different in the homegardens of two VDCs. DOI: http://dx.doi.org/10.3126/eco.v18i0.9415Ecoprint: An International Journal of EcologyVol. 18, 2011 Page: 85-90 Uploaded date: 12/22/2013 

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