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Searching for null monads

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Searching for null monads

by jdsh » Sun Jun 27, 2021 9:22 pm

I'd like to make a list of monads with no records for my county. This query https://database.bsbi.org/search.php#re ... 6381d81b6e should do it for a specific hectad (just using that for testing so that it runs faster), but the DDb doesn't return monads with zero taxa recorded. I may be missing something or it may not have been built in, or possibly not thought to be wanted.

Jon
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Re: Searching for null monads

by AndyAmphlett » Sun Jul 04, 2021 6:01 pm

Jon,

This query was raised some years ago - viewtopic.php?f=1&t=204&p=538&hilit=null#p538 - but the link to the DDb query doesn't seem to work any more. I have re-created it for Cambridgeshire (finding monads with no records since 2000) - https://database.bsbi.org/search.php#re ... 36fcfd8607. The null monads won't map though.

Andy.
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