Low impact of Zostera marina meadows on sediment and water microbiota under brackish conditions
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View abstract on PubMed
Summary
This summary is machine-generated.Seagrass meadows, like Zostera marina, significantly impact sediment and water microbiota, especially at higher salinities (9-15). Physical effects, such as canopy height, explain these interactions in brackish environments.
Area Of Science
- Marine ecology
- Microbial ecology
- Ecosystem engineering
Background
- Zostera marina (eelgrass) is a key ecosystem engineer in shallow waters.
- Salinity changes, particularly between 6-9, strongly influence aquatic biota.
- Understanding eelgrass's impact on microbiota across salinity gradients is crucial.
Purpose Of The Study
- To investigate the effects of Zostera marina meadows on surrounding sediment and water microbiota.
- To analyze these effects across a salinity range of 6-15 in the Baltic Sea.
- To determine the influence of the salinity gradient on eelgrass-microbiota interactions.
Main Methods
- 16S and 18S rRNA gene amplicon sequencing were used.
- Microbiota composition in water and sediment was analyzed.
- Effects were studied across a salinity gradient from 6 to 15.
Main Results
- Salinity was the primary driver of microbiota structure in both water and sediment.
- Zostera marina influenced bacterial and eukaryotic communities and sediment bacterial diversity, but only at salinities of 9-15.
- Eelgrass had insignificant effects on microbiota below salinity 9.
Conclusions
- Increased salinity correlated with longer eelgrass leaves and greater canopy height.
- Canopy height, by reducing water velocity, is proposed as the main factor influencing microbiota at salinities 9-15.
- Findings highlight the physical ecosystem services of eelgrass meadows and inform management in changing brackish conditions.
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