SBC LTER: Reef: Seasonal Kelp Forest Community Dynamics: Urchin size frequency distribution
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资源简介：
These data describe the size frequency distribution of red
(Mesocentrotus franciscanus) and purple
(Strongylocentrotus purpuratus) sea urchins
within permanent plots of SBCLTER's seasonal kelp forest
monitoring program to track long-term patterns in species
abundance and diversity. The diameter of the test (shell without
spines) was recorded to the nearest 0.5 cm for 50 red and 50
purple sea urchins located within a 40 m x 2 m area of each plot.
Size frequency data of red and purple sea urchins are not
collected in the continual kelp removal plots. When combined with
size-mass relationships established in the laboratory these data
were used to provide a non-destructive, in situ estimate of the
dry mass per unit area of bottom for each species. The experiment
was initiated in 2008 at five reef sites along the mainland coast
of the Santa Barbara Channel.
提供机构：
Environmental Data Initiative
创建时间：
2025-05-16
