http://lod.bco-dmo.org/id/dataset/1000475 eng; USA utf8 dataset Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact 2026-06-05 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Owl limpet growth rates and mussel cover in Northern and Central California collected from eight intertidal sites from Jun 2021 to May 2023 2026-06-09 publication 2026-06-09 revision BCO-DMO Linked Data URI 2026-06-09 creation http://lod.bco-dmo.org/id/dataset/1000475 Rachael Bay University of California-Davis principalInvestigator Eric Sanford University of California-Davis principalInvestigator Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. publisher Cite this dataset as: Walkes, S., Bay, R., Sanford, E. (2026) Owl limpet growth rates and mussel cover in Northern and Central California collected from eight intertidal sites from Jun 2021 to May 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-06-09 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/1000475 [access date] Owl limpet growth rates and mussel cover 2021-2023 Dataset Description: Methods and Sampling: &lt;p&gt;This dataset contains growth measurements of tagged &lt;em&gt;Lottia gigantea&lt;/em&gt; individuals collected as part of a long-term monitoring effort. Growth rates were calculated from repeated shell measurements collected during annual resurveys. The dataset includes mussel cover measured at the time of the surveys. The related dataset (found in the Related Dataset section) includes the 2023–2024 survey period separately and includes&amp;nbsp;co-occurring grazer species counts and densities.&lt;/p&gt; &lt;p&gt;&lt;em&gt;Variation in biotic communities&lt;/em&gt;:&lt;/p&gt; &lt;p&gt;We surveyed &lt;em&gt;L. gigantea &lt;/em&gt;habitats to test whether the biotic environment differed among the four range core sites and four expanding edge sites, and whether variation in &lt;em&gt;L. gigantea &lt;/em&gt;performance was associated with the biotic environment. We considered Dillon Beach, Bodega Marine Reserve, Fort Ross, and Kruse Ranch to be in the expanded range (Sanford et al., 2019), and Vandenberg, Seal Beach, Soberanes Point, and Hopkins Marine Station to be in the range core. Given that &lt;em&gt;L. gigantea &lt;/em&gt;have a patchy distribution (Fenberg &amp;amp; Rivadeneira, 2011), we haphazardly established 50-100 1m&lt;sup&gt;2 &lt;/sup&gt;plots with limpets present at each site, across approximately 300 m of intertidal habitat. Each plot was marked with marine epoxy (Zspar splash zone compound) in its center. Within each plot, we tagged a single focal &lt;em&gt;L. gigantea &lt;/em&gt;using a small (&amp;lt; 6 mm) Floy Tag fixed to the anterior end of the shell using a small dab of marine epoxy (Zspar splash zone compound). For each tagged focal limpet, we recorded growth rate using calipers to relate performance to variation in environmental factors.&lt;/p&gt; &lt;p&gt;Within each plot, we recorded co-occurring grazing species and sessile space occupying species (see Related Datasets for co-occurring grazer species counts and densities). In summer 2021, we surveyed conspecific density and mussel cover in each plot. To record conspecific density, we counted all &lt;em&gt;L. gigantea &lt;/em&gt;individuals within each 1m&lt;sup&gt;2&lt;/sup&gt; plot. To determine mussel cover, we photographed each plot using a digital camera (Olympus Touch), and measured mussel cover for the full plot in imageJ (Schneider, 2012).&amp;nbsp;&lt;/p&gt; &lt;p&gt;To quantify performance across the range in response to biotic drivers, we recorded organismal growth rate as a function the environmental data collected within each 1m&lt;sup&gt;2&lt;/sup&gt; plot. In &lt;em&gt;L. gigantea &lt;/em&gt;growth rate is a strong metric for performance and fitness, as shell length scales with gonad mass (Kido &amp;amp; Murray, 2003). We measured shell length for all tagged limpets from the anterior to posterior end of the shell using calipers. Each focal limpet was measured annually between 2021 and 2023, and because limpet starting size differed, we calculated relative growth rate (RGR) as ln(SL&lt;sub&gt;Final&lt;/sub&gt;/SL&lt;sub&gt;Initial&lt;/sub&gt;/Δt), where SL is shell length and t is time (Paine et al., 2012).&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2023297 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2023297 onGoing Rachael Bay University of California-Davis 530-754-1439 Dept of Evolution and Ecology University of California Davis CA 95616 US rbay@ucdavis.edu pointOfContact Eric Sanford University of California-Davis P.O. Box 247 2099 Westshore Road Bodega Bay CA 94923 USA edsanford@ucdavis.edu pointOfContact asNeeded Dataset Version: 1 Unknown Plot Lottia_count Mussel_cover Length_initial Width_initial Date_initial Site Length_final Width_final dt Date_final RGR Latitude Longitude calipers Olympus Touch digital camera Floy Tag theme None, User defined site abundance area_measured length width date days rate_measurements latitude longitude featureType BCO-DMO Standard Parameters calipers Camera labeling tag instrument BCO-DMO Standard Instruments otherRestrictions otherRestrictions Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use. Evolutionary and ecological dynamics of a contemporary climate-driven range expansion https://osprey.bco-dmo.org/project/867543 Evolutionary and ecological dynamics of a contemporary climate-driven range expansion <p><em>NSF abstract:</em><br /> Anthropogenic climate change is shifting the distributions of species across the globe. Such contemporary shifts in species’ ranges may have cascading effects on entire ecosystems. This project disentangles the mechanisms underlying climate-driven species range shifts in marine systems using the intertidal owl limpet as a case study. During the recent marine heatwaves off the Pacific coast of North America, populations at the northern range limit in northern California have expanded, with ongoing reproduction even after termination of the heatwave events. This is therefore an ideal system to explore the dynamics of natural selection that occur as species occupy new regions. Broadly, this project deepens understanding of how range shifts occur in marine systems and furthers the ability to predict future species distributions in response to climate change. The project provides research experiences for high school and undergraduate students from historically underrepresented groups by engaging with existing, demonstrably-effective programs. The investigators host leadership and skill-building workshops for senior female graduate students and engage the public in partnership with the California Academy of Sciences, Bodega Marine Lab, and San Francisco Exploratorium. Finally, the project provides training for a postdoctoral scholar and two graduate students.</p> <p>Although phenomenological studies suggest that climate-associated range shifts are common in marine systems, to date, mechanistic studies of the climate-organism interactions that alter geographic distributions have largely focused on terrestrial systems. However, dispersal dynamics greatly differ in many marine systems, as currents may frequently transport planktonic larvae into new environmental regimes. This project integrates detailed demographic observations of the recent range expansion of the intertidal owl limpet, Lottia gigantea, with ecological, phenotypic, and genomic measurements of divergence across its range. Specifically, the work 1) documents phenotypic divergence in larval and juvenile traits across the zone of range expansion, 2) uses whole genome sequencing to estimate gene flow across the entire range, 3) identifies genomic patterns of selection across the zone of range expansion and through time, and 4) identifies drivers of variation in performance over latitudinal and microgeographic scales. The ability to monitor this range shift in real time, along with the suitability of this system for tracking individuals across multiple years, allows the investigators to examine the impact of selection in novel range-edge conditions at the phenotypic and genomic levels, and scale from individuals to species-level responses to ongoing environmental change.</p> <p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p> LottiaRangeExp largerWorkCitation project eng; USA biota oceans -123.2422 -120.6201 34.7357 38.5101 2021-06-28 2023-05-15 Coastal California intertidal 0 BCO-DMO catalogue of parameters from Owl limpet growth rates and mussel cover in Northern and Central California collected from eight intertidal sites from Jun 2021 to May 2023 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact http://lod.bco-dmo.org/id/dataset-parameter/1000682.rdf Name: Plot Units: unitless Description: <p>Unique identifier for each 1 m^2 plot in which microenvironmental data and focal limpet growth were recorded</p> http://lod.bco-dmo.org/id/dataset-parameter/1000683.rdf Name: Lottia_count Units: unitless Description: <p>Number of Lottia gigantea counted within each 1m^2 plot</p> http://lod.bco-dmo.org/id/dataset-parameter/1000684.rdf Name: Mussel_cover Units: cm^2 Description: <p>Area of plot substrate covered by mussels</p> http://lod.bco-dmo.org/id/dataset-parameter/1000685.rdf Name: Length_initial Units: mm Description: <p>Initial length measurement for the focal owl limpet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000686.rdf Name: Width_initial Units: mm Description: <p>Initial width measurement for the focal owl limpet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000687.rdf Name: Date_initial Units: unitless Description: <p>Initial date of sampling</p> http://lod.bco-dmo.org/id/dataset-parameter/1000688.rdf Name: Site Units: unitless Description: <p>Location name; Bodega Marine Reserve, Dillon Beach, Hopkins, Kruse Ranch, Seal Beach, Soberanes, or Vandenberg</p> http://lod.bco-dmo.org/id/dataset-parameter/1000689.rdf Name: Length_final Units: mm Description: <p>Final length measurement for the focal owl limpet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000690.rdf Name: Width_final Units: mm Description: <p>Final width measurement of the focal owl limpet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000691.rdf Name: dt Units: days Description: <p>Length of sampling period</p> http://lod.bco-dmo.org/id/dataset-parameter/1000692.rdf Name: Date_final Units: unitless Description: <p>Final date of sampling period</p> http://lod.bco-dmo.org/id/dataset-parameter/1000693.rdf Name: RGR Units: mm/mm/day Description: <p>Relative growth rate across sampling period for the focal owl limpet</p> http://lod.bco-dmo.org/id/dataset-parameter/1000694.rdf Name: Latitude Units: decimal degrees Description: <p>Latitude of study site, positive is North</p> http://lod.bco-dmo.org/id/dataset-parameter/1000696.rdf Name: Longitude Units: decimal degrees Description: <p>Longitude of study site, negative is West</p> GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact https://osprey.bco-dmo.org/dataset/1000475/data/download download onLine dataset &lt;p&gt;This dataset contains growth measurements of tagged &lt;em&gt;Lottia gigantea&lt;/em&gt; individuals collected as part of a long-term monitoring effort. Growth rates were calculated from repeated shell measurements collected during annual resurveys. The dataset includes mussel cover measured at the time of the surveys. The related dataset (found in the Related Dataset section) includes the 2023–2024 survey period separately and includes&amp;nbsp;co-occurring grazer species counts and densities.&lt;/p&gt; &lt;p&gt;&lt;em&gt;Variation in biotic communities&lt;/em&gt;:&lt;/p&gt; &lt;p&gt;We surveyed &lt;em&gt;L. gigantea &lt;/em&gt;habitats to test whether the biotic environment differed among the four range core sites and four expanding edge sites, and whether variation in &lt;em&gt;L. gigantea &lt;/em&gt;performance was associated with the biotic environment. We considered Dillon Beach, Bodega Marine Reserve, Fort Ross, and Kruse Ranch to be in the expanded range (Sanford et al., 2019), and Vandenberg, Seal Beach, Soberanes Point, and Hopkins Marine Station to be in the range core. Given that &lt;em&gt;L. gigantea &lt;/em&gt;have a patchy distribution (Fenberg &amp;amp; Rivadeneira, 2011), we haphazardly established 50-100 1m&lt;sup&gt;2 &lt;/sup&gt;plots with limpets present at each site, across approximately 300 m of intertidal habitat. Each plot was marked with marine epoxy (Zspar splash zone compound) in its center. Within each plot, we tagged a single focal &lt;em&gt;L. gigantea &lt;/em&gt;using a small (&amp;lt; 6 mm) Floy Tag fixed to the anterior end of the shell using a small dab of marine epoxy (Zspar splash zone compound). For each tagged focal limpet, we recorded growth rate using calipers to relate performance to variation in environmental factors.&lt;/p&gt; &lt;p&gt;Within each plot, we recorded co-occurring grazing species and sessile space occupying species (see Related Datasets for co-occurring grazer species counts and densities). In summer 2021, we surveyed conspecific density and mussel cover in each plot. To record conspecific density, we counted all &lt;em&gt;L. gigantea &lt;/em&gt;individuals within each 1m&lt;sup&gt;2&lt;/sup&gt; plot. To determine mussel cover, we photographed each plot using a digital camera (Olympus Touch), and measured mussel cover for the full plot in imageJ (Schneider, 2012).&amp;nbsp;&lt;/p&gt; &lt;p&gt;To quantify performance across the range in response to biotic drivers, we recorded organismal growth rate as a function the environmental data collected within each 1m&lt;sup&gt;2&lt;/sup&gt; plot. In &lt;em&gt;L. gigantea &lt;/em&gt;growth rate is a strong metric for performance and fitness, as shell length scales with gonad mass (Kido &amp;amp; Murray, 2003). We measured shell length for all tagged limpets from the anterior to posterior end of the shell using calipers. Each focal limpet was measured annually between 2021 and 2023, and because limpet starting size differed, we calculated relative growth rate (RGR) as ln(SL&lt;sub&gt;Final&lt;/sub&gt;/SL&lt;sub&gt;Initial&lt;/sub&gt;/Δt), where SL is shell length and t is time (Paine et al., 2012).&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;We calculated relative growth rate (RGR) as ln(SL&lt;sub&gt;Final&lt;/sub&gt;/SL&lt;sub&gt;Initial&lt;/sub&gt;/Δt), where SL is shell length and t is time.&lt;/p&gt; Specified by the Principal Investigator(s) - Loaded tagging_growth2021.2023.csv as table &quot;tagging_growth&quot; with empty string and &quot;nd&quot; treated as missing values - Renamed columns: Lottia.count to Lottia_count, Mussel.cover to Mussel_cover, Length_i to Length_initial, Width_i to Width_initial, Date_i to Date_initial, Length_f to Length_final, Width_f to Width_final, Date_f to Date_final - Converted Date_initial from format %m/%d/%y to ISO format %Y-%m-%d (string output) - Converted Date_final from format %m/%d/%y to ISO format %Y-%m-%d (string output) - Applied find/replace on Site column: replaced &quot;BMR&quot; with complete name &quot;Bodega Marine Reserve&quot; - Output to 1000475_v1_limpet_tagging_growth_2021_to_2023.csv Specified by BCO-DMO Data Managers asNeeded 7.x-1.1 Biological and Chemical Oceanography Data Management Office (BCO-DMO) Unavailable 508-289-2009 WHOI MS#36 Woods Hole MA 02543 USA info@bco-dmo.org http://www.bco-dmo.org Monday - Friday 8:00am - 5:00pm For questions regarding this resource, please contact BCO-DMO via the email address provided. pointOfContact calipers calipers PI Supplied Instrument Name: calipers PI Supplied Instrument Description:For each tagged focal limpet, we recorded growth rate using calipers to relate performance to variation in environmental factors. Instrument Name: calipers Instrument Short Name: Instrument Description: A caliper (or "pair of calipers") is a device used to measure the distance between two opposite sides of an object. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or a digital display. Olympus Touch digital camera Olympus Touch digital camera PI Supplied Instrument Name: Olympus Touch digital camera PI Supplied Instrument Description:Camera: Olympus Touch digital camera Instrument Name: Camera Instrument Short Name:camera Instrument Description: All types of photographic equipment including stills, video, film and digital systems. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/311/ Floy Tag Floy Tag PI Supplied Instrument Name: Floy Tag PI Supplied Instrument Description:Within each plot, we tagged a single focal L. gigantea using a small (< 6 mm) Floy Tag fixed to the anterior end of the shell using a small dab of marine epoxy (Zspar splash zone compound). Instrument Name: labeling tag Instrument Short Name: Instrument Description: Passive devices attached to captured organisms to specifically identify them when recaptured after release.