Answer

Yes, in Jain Dharma algae, bacteria, insects, and all living beings are considered jīvas, so they do bind karma. But this does not mean they “do karma” in the same conscious, moral way humans do.

Explanation

In Jainism, karma binds to the soul through:

• Yoga — activity of body, speech, and mind
• Kaṣāya — passions like attachment, aversion, anger, greed, pride, and deceit

For very small beings:

• Algae / plant-like beings are usually understood as one-sensed living beings.
• Bacteria / microscopic life are also treated within the realm of very subtle life forms.
• Insects are more developed living beings with more senses and more active response.

So:

• They do have karma.
• They bind karma according to their level of consciousness and activity.
• But they do not usually bind karma through deliberate thinking like humans.

About Nidāna Karma

Nidāna means a selfish, future-oriented desire or resolve, such as:

• “May I get this pleasure later”
• “May I gain this result for myself”

In Jain tradition, nidāna is generally understood as a deliberate mental intention born from attachment.

So for algae, bacteria, and very simple beings:

• They may bind karma,
• but nidāna karma is generally not attributed to them in the usual technical sense,
• because nidāna requires a more developed and intentional inner resolve.

Insects, being more developed, are closer to having such mental states than one-sensed beings, but still far less than human beings.

Spiritual Understanding

Jain Dharma teaches that even the smallest life is sacred. This is why great care is given toward ahiṃsā and compassion.

The important point is:

• Karma is not only about “good” or “bad” action in a human sense.
• It is also about the soul’s subtle activities, attachments, and states of consciousness.
• The smaller the being, the less developed its conscious intention, but the soul is still bound by karma.

Takeaway

• Yes, algae, bacteria, insects, and all jīvas bind karma.
• No, they usually do not perform karma with the same conscious intention as humans.
• Nidāna is generally a more deliberate, mental form of attachment and is usually not attributed to very simple one-sensed beings in the technical Jain sense.