Fossil Reef Long-Term trends

photo banner of different intertidal species

In order to standardize species resolution across all MARINe groups and over time, some species (typically rare) were lumped for graphical presentation of Long-Term monitoring data. See lumped categories for definitions (some variation occurs between methods and over time).

If you experience any barriers accessing the trend graphs below, please contact (pacificr@ucsc.edu) for help.

Photo Plots

photo plot framer

Below are the trends observed for each Photo Plot target species at this site. Long-Term percent cover trend graphs also include any species that reached a minimum of 25% cover during any single point in time within a given target species assemblage. Breaks in trend lines represent missed sampling events. For additional species observed that did not meet this 25% threshold, please use the Graphing Tool.


Chthamalus/Balanus (Acorn Barnacles) – percent cover

barnacle trend plot


Chthamalus/Balanus (Acorn Barnacles) – motile invertebrate counts

barnacle motile trend plot

Mytilus (California Mussel) – percent cover

mytilus trend plot

Mytilus (California Mussel) – motile invertebrate counts

mytilus motile trend plot

Silvetia (Golden Rockweed) – percent cover

silvetia trend plot

Silvetia (Golden Rockweed) – motile invertebrate counts

silvetia motile trend plot

Endocladia (Turfweed) – percent cover

endocladia trend plot

Endocladia (Turfweed) – motile invertebrate counts

endocladia motile trend plot
Last modified: Jul 29, 2025