Chitin density from removal experiments in rocky intertidal Marine Protected Areas, San Juan Islands from 2008-2011 (Subtidal Preserves project)

<p>In this study, we tested the hypothesis that red urchins (Strongylocentrotus franciscanus) and lined chitons (Tonicella spp.) are redundant in the maintenance of available space, defined here as encrusting algae and bare rock. In a factorial field experiment replicated at three sites, we reduced the densities of urchins and chitons for nine months. The effects of grazers were interpreted in the context of natural temporal variation by monitoring the benthic community one year before, during, and after grazer removal.</p>

<p>Physical data - temperature, salinity, conductivity - can also be viewed online at&nbsp;<a href=\"http://nvs.nanoos.org/Explorer\">http://nvs.nanoos.org/Explorer</a>&nbsp;and&nbsp;<a href=\"http://depts.washington.edu/fhl/wx.html\">http://depts.washington.edu/fhl/wx.html</a></p>

<p><strong>Reference for this dataset:</strong></p>

<p><a href=\"http://www.plosone.org/article/authors/info%3Adoi%2F10.1371%2Fjournal.pone.0078969;jsessionid=3865D9F9ECBBD3174EF10F65C01F3CA8\" target=\"_blank\">Elahi R, Sebens KP (2013) Experimental Removal and Recovery of Subtidal Grazers Highlights the Importance of Functional Redundancy and Temporal Context. PLoS ONE 8(11): e78969. doi:10.1371/journal.pone.0078969</a></p>

<p><strong>Associated physical underwater and&nbsp;weather data:</strong></p>

<p>See&nbsp;<a href=\"http://140.142.199.7/vdv/VV_Frame.php\">http://140.142.199.7/vdv/VV_Frame.php</a></p>

<p>本研究针对“红色海胆（Strongylocentrotus franciscanus）与带壳石鳖（Tonicella属）在维持可用空间（本文定义为结壳藻类与裸岩）方面存在功能冗余（functional redundancy）”这一假说开展验证。我们在三个地点设置了重复析因野外实验，连续九个月降低海胆与石鳖的种群密度。通过在植食动物移除前一年、移除期间及移除后一年监测底栖群落，结合自然时间变异背景阐释了植食者的生态效应。</p>
<p>本研究的物理观测数据（涵盖温度、盐度与电导率）亦可通过以下在线链接获取：<a href="http://nvs.nanoos.org/Explorer">http://nvs.nanoos.org/Explorer</a> 与 <a href="http://depts.washington.edu/fhl/wx.html">http://depts.washington.edu/fhl/wx.html</a></p>
<p><strong>本数据集参考文献：</strong></p>
<p><a href="http://www.plosone.org/article/authors/info%3Adoi%2F10.1371%2Fjournal.pone.0078969;jsessionid=3865D9F9ECBBD3174EF10F65C01F3CA8" target="_blank">Elahi R, Sebens KP (2013) 潮下带植食动物的实验移除与恢复研究凸显功能冗余与时间背景的重要性. PLoS ONE 8(11): e78969. doi:10.1371/journal.pone.0078969</a></p>
<p><strong>相关水下物理与气象数据：</strong></p>
<p>可通过<a href="http://140.142.199.7/vdv/VV_Frame.php">http://140.142.199.7/vdv/VV_Frame.php</a>查看。</p>