This exchange was made possible by the action of minute animals: too small to produce burrows of their own, this meiofauna inhabited the spaces between sand grains in the microbial mats.
Este intercambio era posible pola acción de animais diminutos, demasiado pequenos para realizaren as súas propias escavacións, esta meiofauna habitaba nos espazos entre os grans de area nos tapetes microbianos.