DOI: 10.5061/dryad.wwpzgmsw2
title: Field temperatures from Tegula Intertidal marine snail habitats in San Diego, California

description: Climate change-induced population declines of highly abundant intertidal
 invertebrates will affect ecosystem function and stability, but it is not
 fully understood which species are most vulnerable to these declines.
 Rocky intertidal Tegula snails live at different tidal heights and exhibit
 variability in heat tolerance, but the temperatures these different
 species experience in the field, and thus which species are most
 susceptible to climate change, remains unknown. Here, we use HOBO data
 loggers to record field temperatures in the unique thermal habitats of
 Tegula eiseni, Tegula funebralis, and Tegula gallina in San Diego,
 California. Determining the maximum temperatures each Tegula species is
 exposed to in the field will ultimately inform conservation efforts by
 identifying which Tegula species are most threatened by heat stress.
description: HOBO Pendant MX Water Temperature Data Loggers (Onset) set to
 record temperature every 10 minutes were deployed at two different study
 sites in San Diego, CA: La Jolla (LJ; 32°52’N, 117°15’W) and Bird Rock
 (BR; 32°48’N, 117°15’W) for 12.5 weeks. At La Jolla, only <em>Tegula
 gallina</em> were abundant, so two loggers were deployed to assess
 field temperatures experienced by this species. At Bird Rock, all three
 <em>Tegula</em> species <em>(Tegula eiseni, Tegula
 funebralis,</em> and <em>Tegula gallina</em>)<em>
 </em>were abundant, so six total loggers were deployed with two set
 to assess field temperatures experienced by each species. Loggers were
 attached to the horizontal surface of rocks next to live individuals of
 each respective species in the intertidal using Z-spar epoxy (A-788 Splash
 Zone Compound; Lima & Wethey 2009). This placement ensured
 temperatures were recorded from habitat the <em>Tegula</em>
 individuals utilize.  Loggers were deployed for 12.5
 weeks from July to October 2024. Bird Rock suffered high loss of
 instrumentation, losing one <em>T. eiseni</em> logger, one
 <em>T. funebralis</em> logger, and both <em>T.
 gallina</em> loggers. <em>T. gallina</em> data presented
 here are from the La Jolla loggers placed ~ +0.5 m and ~ +1.0 m above mean
 lower low water (MLLW). The <em>T. funebralis</em> and T.
 eiseni data are from Bird Rock loggers, placed at ~+0.76 m and ~+0.12 m,
 respectively. During deployment, the T. funebralis logger at Bird Rock was
 turned upside down and submerged in a tidepool which prevented it from
 logging air temperatures. To estimate when this occurred, we used the
 temperature data, in conjunction with the high and low tide times and
 predictions of temperature fluctuations that would occur if the logger was
 exposed to air, and thus removed any data after September 18,
 2024.
description: # Field temperatures from Tegula Intertidal marine snail habitats in San
 Diego, California
 [https://doi.org/10.5061/dryad.wwpzgmsw2](https://doi.org/10.5061/dryad.wwpzgmsw2) ## Description of the data and file structure This dataset contains field temperature data collected from the habitats utilized by three different species of *Tegula* intertidal marine snails (*Tegula eiseni*, *Tegula funebralis*, and *Tegula gallina*) to investigate their exposure to heat stress in their natural intertidal height ranges at two sites in San Diego, California: Dike Rock (32° 52’ N, 117° 15’ W) and Bird Rock (32° 48’ N, 117° 15’ W). We utilized HOBO Pendant MX Water Temperature Data Loggers set to record temperature every 10 minutes to monitor and record temperatures in the snails’ unique microhabitats for 12.5 weeks from July to October 2024, aiming to assess the maximum and range of temperatures these species experience during the hottest time of the year. This data provides critical insights into the heat stress levels each species of snails is exposed to, helping us to contextualize their physiological limits and thermal thresholds amidst changing environmental conditions. ### Files and variables #### File: 2190990\_2014-9-18\_06\_14\_24\_BadDataRemoved\_11.7.14.xlsx **Description:** HOBO logger 90 contains a subset of temperature values for *T. funebralis* at Bird Rock in San Diego, California (32° 48’ N, 117° 15’ W). Logger was placed +0.76 m above mean lower low water (MLLW). Data past 9/18/2024 omitted due to field malfunction when logger got turned upside down in a tide pool, preventing it from being exposed to air. ##### Variables * The Excel file contains three tabs: Data (raw recordings), Events (HOBOlogger connections), and Details (device information and configuration). In the Data tab, the “#” column indicates the recording number, Date-Time (PDT) records the collection time in Pacific Daylight Time at 10-minute intervals, and Temperature shows the recorded values in degrees Celsius. #### File: 21909985\_2024-10-17\_15\_34\_25\_PDT\_(Data\_PDT).xlsx **Description:** HOBO logger 85 recorded temperature data for *T. gallina* at Dike Rock in La Jolla, San Diego, California (32° 52’ N, 117° 15’ W). Logger was placed +1.0 m above MLLW. ##### Variables * The Excel file contains three tabs: Data (raw recordings), Events (HOBOlogger connections), and Details (device information and configuration). In the Data tab, the “#” column indicates the recording number, Date-Time (PDT) records the collection time in Pacific Daylight Time at 10-minute intervals, and Temperature shows the recorded values in degrees Celsius. #### File: 21909988\_2024-10-18\_15\_26\_06\_PDT\_(Data\_PDT).xlsx **Description:** HOBO logger 88 recorded temperature data for *T. eiseni* at Bird Rock in San Diego, California (32° 48’ N, 117° 15’ W). Logger was placed +0.12 m above MLLW. ##### Variables * The Excel file contains three tabs: Data (raw recordings), Events (HOBOlogger connections), and Details (device information and configuration). In the Data tab, the “#” column indicates the recording number, Date-Time (PDT) records the collection time in Pacific Daylight Time at 10-minute intervals, and Temperature shows the recorded values in degrees Celsius. #### File: 21909984\_2024-10-17\_15\_28\_35\_PDT\_(Data\_PDT).xlsx **Description:** HOBO logger 84 recorded temperature data for *T. gallina* at Dike Rock in La Jolla, San Diego, California (32° 52’ N, 117° 15’ W). Logger was placed +0.5 m above MLLW. ##### Variables * The Excel file contains three tabs: Data (raw recordings), Events (HOBOlogger connections), and Details (device information and configuration). In the Data tab, the “#” column indicates the recording number, Date-Time (PDT) records the collection time in Pacific Daylight Time at 10-minute intervals, and Temperature shows the recorded values in degrees Celsius.  #### File: 21909990\_2024-10-18\_16\_02\_09\_PDT\_(Data\_PDT).xlsx **Description:** HOBO logger 90 recorded temperature data for *T. funebralis* at Bird Rock in San Diego, California (32° 48’ N, 117° 15’ W). Logger was placed +0.76m above MLLW. ##### Variables * The Excel file contains three tabs: Data (raw recordings), Events (HOBOlogger connections), and Details (device information and configuration). In the Data tab, the “#” column indicates the recording number, Date-Time (PDT) records the collection time in Pacific Daylight Time at 10-minute intervals, and Temperature shows the recorded values in degrees Celsius. ## Code/software Data may be viewed using Microsoft Excel or Google Sheets. ## Access information Other publicly accessible locations of the data: * Not applicable Data was derived from the following sources: * Not applicable