Pacific Rocky Intertidal Monitoring: Trends and Synthesis

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Trailer Long-Term trends

See below for trend graphs

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).

Photo Plots

Long-Term methods Photo Plot thumbnail

Below are the trends observed for each Photo Plot target species at this site. Long-Term percent cover trend graphs show all 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 Interactive Map.

For motile invertebrate Species Counts, a mean across all plots was calculated, and only those species with a value of at least 5 individuals for at least one sample are shown. For motile invertebrate size trend graphs by site, please use the Interactive Map.

 Chthamalus/Balanus (Acorn Barnacles) - percent cover

Trailer barnacle trend plot

 Chthamalus/Balanus (Acorn Barnacles) - motile invertebrate counts

Trailer barnacle trend plot

 Mytilus (California Mussel) - percent cover

Trailer Mytilus trend plot

 Mytilus (California Mussel) - motile invertebrate counts

Trailer Mytilus trend plot

 Hesperophycus (Olive Rockweed) - percent cover

Trailer Hesperophycus trend plot

 Hesperophycus (Olive Rockweed) - motile invertebrate counts

Trailer Hesperophycus trend plot

 Silvetia (Golden Rockweed) - percent cover

Trailer Silvetia trend plot

 Silvetia (Golden Rockweed) - motile invertebrate counts

Trailer Silvetia trend plot

Transects

Long-Term methods Transects thumbnail

Below are the trends observed for each Transect target species at this site. Long-Term trend graphs show all 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.

Phyllospadix (Surfgrass)

Trailer surfgrass trend plot

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Interactive Map

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