AEA - Cara Pencuplikan Bentos dengan menggunakan Ekman Dredge / Ekman Grab

Summary

This video explains the process of sampling benthos using the X-Men drag tool, primarily for fresh water environments with growing substrates. It highlights the proper tools needed, such as the X-Men Grace lifejacket, plastic tray, and the parts of the dredge tool. The video walks through the steps of hooking the wire to the trigger, lowering the tool into the river, and lifting it back to the surface to collect the substrate samples. Once the samples are retrieved, they are transferred into a container for further analysis, offering a clear and practical guide for benthos sampling.

Takeaways

• 😀 The video explains how to sample benthos using the 'men-drag' or 'x-men' grade tool in freshwater environments.
• 😀 The tool is used for collecting benthos samples from substrates with soft materials but not recommended for gravel or rock substrates.
• 😀 Essential equipment for sampling includes the x-men grade, lifejacket, and a plastic tray.
• 😀 The parts of the sampling tool include a rope, messenger tool, trigger, lid cover, retaining wire, and the x-men dredge.
• 😀 The messenger tool releases the wire tied to the trigger, ensuring the lid is opened and not locked during sampling.
• 😀 The trigger is used to hook the wire binding the lid, allowing access to the sampling area.
• 😀 The top cover of the tool can be opened to observe the sampling results.
• 😀 Before starting the sample collection, hook the wire to each trigger and lower the tool carefully into the water.
• 😀 Once the tool reaches the bottom, release the messenger with the rope to position it properly and avoid obstruction.
• 😀 After the tool has been raised to the surface, move the substrate sample into a container for further analysis.
• 😀 The x-men tool has specific open and closed positions for its operation during sampling, allowing for effective sample retrieval.

Q & A

What is the purpose of using the X-Men Grade tool in this script?

The X-Men Grade tool is used to collect benthic samples from freshwater environments with growing substrates, but it is not suitable for areas with gravel or rock substrates.

Which substrates are the X-Men tool not recommended for sampling?

The X-Men tool is not recommended for use in areas with gravel or rock substrates.

What tools are needed for benthos sampling according to the script?

The tools needed are the X-Men Grade lifejacket and a plastic tray.

What are the main parts of the equipment used for benthos sampling?

The main parts of the equipment include the rope, messenger, trigger, top cover, retaining wire, and the dredge tool.

What is the function of the messenger tool in this process?

The messenger tool is used to release the wire tied to the trigger mechanism, allowing the top cover to open and close during sampling.

What role does the trigger play in the sampling process?

The trigger hooks the wire that binds the lid, enabling the tool to open and close during the collection process.

How do you position the tool for sampling once the rope is released?

Once the rope is released, you must ensure that the messenger's path is not obstructed as the tool is lowered to the bottom of the riverbed.

What should you do after the tool reaches the riverbed and the covers are closed?

After the tool reaches the riverbed and the covers are closed, you should carefully lift the tool back to the surface.

What should be done with the substrate or sample once the tool reaches the surface?

Once the tool is lifted to the surface, the substrate or sample should be moved into a container and then placed into a plastic bag for further analysis.

Why is the X-Men tool suitable for soft substrates?

The X-Men tool is designed to disturb soft substrates, making it easier to collect benthic samples from these environments.