Thanking administrators for bulk information email
No. You probably don't need to reply.
You should reply if:

You have reason to believe that it will help your administrator to know that you've received the email.
The email is unusually important/helpful to you.
The email is unclear and you want clarification.
The administrator is going &quot;above and beyond&quot;. For example, because they are sending everyone general information following your suggestion or a discussion they had with you.

If there is a small number of participants, it could also be helpful say thanks if you do not usually receive emails from this administrator or group of administrators. For example, to give them feedback about including you in their mailing list.
To be sure, I suggest you briefly discuss this with a friend or line manager. Customs vary between research groups, so it is possible that customary thanks are expected.
This answer is based on etiquette in the UK, which I expect to be similar to the US.