Evolution/Events
A 1933 study documented the life in California's intertidal zone at Pacific Grove. Sixty
years later, doctoral student Raphael Sagarin examined the same exact area and found, in the words of the Los Angeles Times, "It was almost as if Malibu had moved to Monterey Bay." The biogeography of the area had dramatically transformed over the last six decades. Flora and fauna associated with warmer Southern California had moved
northward. The explanation was that increased temperatures were the culprit.
Using temperatures averaged over a 13-year period (climate data typically relies upon 30-year spans of data), researchers discovered that the study site had risen 4 degrees Fahrenheit over the 60 years and annual temperature increased 2 degrees.
In addition to climatic impacts, people have a dramatic impact on the intertidal zones. While it's illegal to remove as much as a shell from many tidal pools, there is very limited enforcement so buckets of marine plants and animals are carried away from intertidal zones each day. That which is not carried away is often crushed or destroyed by sightseers who visit tidal pools and rocky intertidal zones. This loss and damage affects the biodiversity and food cycle of these precious marine environments.
Source - http://geography.about.com/od/physicalgeography/a/intertidal.htm
years later, doctoral student Raphael Sagarin examined the same exact area and found, in the words of the Los Angeles Times, "It was almost as if Malibu had moved to Monterey Bay." The biogeography of the area had dramatically transformed over the last six decades. Flora and fauna associated with warmer Southern California had moved
northward. The explanation was that increased temperatures were the culprit.
Using temperatures averaged over a 13-year period (climate data typically relies upon 30-year spans of data), researchers discovered that the study site had risen 4 degrees Fahrenheit over the 60 years and annual temperature increased 2 degrees.
In addition to climatic impacts, people have a dramatic impact on the intertidal zones. While it's illegal to remove as much as a shell from many tidal pools, there is very limited enforcement so buckets of marine plants and animals are carried away from intertidal zones each day. That which is not carried away is often crushed or destroyed by sightseers who visit tidal pools and rocky intertidal zones. This loss and damage affects the biodiversity and food cycle of these precious marine environments.
Source - http://geography.about.com/od/physicalgeography/a/intertidal.htm