SBC LTER: Settlement of urchins and other invertebrates, ongoing since 1990

The dataset comprises weekly to biweekly data on invertebrate
settlement on artificial substrates at six sites in Southern
California, and one site in Northern California. The study began
in early 1990 and is ongoing. The study’s main focus is on urchins
(Strongylocentrotus purpuratus and
Mesocentrotus franciscanus), but was expanded
to include selected bivalves, gastropods and crabs during the
period 1994-1997.

The purpose of the study is to compare and contrast patterns of
settlement supply across a large geographical gradient to explore
the possible influence of oceanographic features on these
patterns. Both of these goals are facilitated by the long duration
of the dataset, its large geographical range and the high temporal
frequency of collection.

See Methods for more information.

本数据集涵盖美国南加州6处、北加州1处人工基质上无脊椎动物（invertebrate）附着的周度至双周观测数据。本研究始于1990年初，目前仍在持续进行中。研究的核心关注对象为海胆（urchin）：紫球海胆（Strongylocentrotus purpuratus）和加州红海胆（Mesocentrotus franciscanus），并于1994年至1997年间扩展研究范围，纳入特定双壳类（bivalve）、腹足类（gastropod）及蟹类（crab）类群。

本研究旨在对比跨大范围地理梯度的幼体附着供给格局，探究海洋学特征（oceanographic features）对该格局的潜在影响。本数据集的长期观测时长、广泛的地理覆盖范围以及高频次的采样频率，为实现上述两项研究目标提供了坚实支撑。

更多细节请参见研究方法部分。