In an attempt to make the public processes on this web site as easy to follow as possible, the site was designed to provide access to information through several channels that may of value to people too busy to directly check the web site regularly.
What are those orange icons?
You may have noticed that the ocean topics on this website have RSS feed icons ("") displayed on the main page for each section. These icons allow users to subscribe to the contents of this website using any number of feed-reading technologies.
Google has a "Feed 101" page that has information on various ways to use RSS. They suggest several options for using RSS feeds:
What are all the other icons displayed at the bottom of individual Articles?
The links at the bottom of articles are provided so that readers who want to bookmark or share specific articles with friends can easily send the page address for the article to any one of a number of social bookmarking services. Similar to using the email icon for sending the URL of an article out via email.