Fluorescently Labeled Bacteria as a Tracer to Reveal Novel Pathways of Organic Carbon Flow in Aquatic Ecosystems
September 13th, 2019
Presented here is a protocol for a single-cell, epifluorescence microscopy-based technique to quantify grazing rates in aquatic predatory eukaryotes with high precision and taxonomic resolution.
This approach is significant because it allows us to visualize and estimate carbon and energy flows from prokaryotes to higher trophic levels in microbial food webs at a very high resolution.This is the only technique currently available for determining which protist species consume bacteria in situ, and at the same time quantifying the rate of this process at a single-cell level.Since bacteria are the only significant microbes changing dissolved organic carbon to particulate organic carbon, the knowledge of the players involved and rates at which this happens forms the basis for understanding aquatic ecosystems in general.We highly recommend that researchers become familiar with their study system before they conduct any grazing experiments.This in involves light and epifluorescence of microscopy inspection of the samples, and the knowledge of main taxon present and their seasonal dynamics.Demonstrating the procedure will be Jitka Jezberov
View the full transcript and gain access to thousands of scientific videos
Overview
This article presents a protocol for a single-cell, epifluorescence microscopy-based technique designed to quantify grazing rates in aquatic predatory eukaryotes. The method allows for high precision and taxonomic resolution in measurements.
Key Study Components
Area of Science
- Neuroscience
- Biology
- Ecology
Background
- Understanding grazing rates is crucial for ecological studies.
- Single-cell techniques provide detailed insights into predatory behaviors.
- Epifluorescence microscopy enhances visualization of eukaryotic organisms.
- High precision measurements are essential for accurate ecological modeling.
Purpose of Study
- To develop a reliable protocol for quantifying grazing rates.
- To improve taxonomic resolution in aquatic studies.
- To facilitate better understanding of predator-prey interactions.
Methods Used
- Single-cell epifluorescence microscopy
- Quantitative analysis of grazing rates
- Taxonomic identification of predatory eukaryotes
- Experimental design for ecological assessment
Main Results
- Successful quantification of grazing rates in various eukaryotic species.
- High precision in measurements demonstrated.
- Enhanced taxonomic resolution achieved through the method.
- Insights into predator-prey dynamics provided.
Conclusions
- The protocol offers a valuable tool for ecological research.
- High precision and taxonomic resolution are critical for understanding aquatic ecosystems.
- Future studies can build on this method for broader ecological applications.
Frequently Asked Questions
Chapters in this video
0:04
Title
1:11
Sample Collection and Fixation
1:44
Sample Filtration and Enumeration of Bacterial Numbers on the Filters
2:45
Determining Protistan Abundance
3:28
Estimating Ciliate Grazing Rates
4:33
Results: Novel Pathways of Organic Carbon Flow in Aquatic Ecosystems
8:07
Conclusion
