A retrieved HOBO temperature logger at Katmai National Park and Preserve

A scientist holds a HOBO temperature logger that was recently retrieved from a sampling site at Katmai National Park and Preserve. The sensor end of the HOBO was partially covered by a small sea star (Leptasterias spp.) when recovered from the site. The temperature loggers record the water temperature. Intertidal communities are exposed to both air and water temperatures as tides flow in and out. Temperature is a strong driver of intertidal community structure and can vary from very warm to below freezing at Katmai.