ðɪ ɛɡzˈɪstəns ʌv ʌndɪskˈʌvɚd stɹˈeɪnz ʌv maɪkɹˈoʊbɪəl lˈɪθoʊjˌuːɾətɹˌɑːfz ɪz θˈiəɹaɪzd bˈeɪst ˌɔn sˌʌm ʌv ðiːz sˈaɪkəlz, æz ðeɪ ɑːɹ nˈiːdᵻd tʊ ɛksplˈeɪn fɪnˈɑːmɪnə lˈaɪk ðə kənvˈɜːʒən ʌv æmˈoʊniəm ɪn ˈaɪɚnɹᵻdˈuːsɪŋ ɛnvˈaɪɹənmənts.
The existence of undiscovered strains of microbial lithoautotrophs is theorized based on some of these cycles, as they are needed to explain phenomena like the conversion of ammonium in iron-reducing environments.