©2020 Biological and Chemical Oceanography Data Management Office.This dataset is part of a suite of studies conducted in Southeast Alaska to determine how benthic communities respond to variable environmental conditions. In an effort to determine how temperature and carbonate chemistry combine to affect primary consumer bioenergetics and research the indirect effects of ocean acidification and warming on primary consumers, the sea urchin population was investigated. The frequency of occurrence and test diameter was recorded for sea urchins at Sitka Sound and...
Show moreThe frequency of occurrence and size (test diameter) was recorded for sea urchins at 19 sites in Sitka Sound and Torch Bay, Alaska from 1988 to 2019. At each site, twenty quadrats were placed at random locations along a transect line. Sea urchins were measured in either all 20 quadrats or when 200 sea urchins had been sized, whichever came first.
Sampling and analytical procedures: Sizing the sea urchin was done by measuring the test diameter with calipers. Data represents combined observations and measurements collected from multiple groups using the same approach in the field.
GPS coordinates are only relevant for data collected after 1988
Kroeker, K., Raimondi, P. T., Estes, J. A. (2021) Sea urchin frequency and diameters as surveyed in Sitka Sound and Torch Bay, Alaska. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-02-26 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.842621.1 [access date]
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