Factors Controlling the Biota of Tide-Pools

摘要: It is a matter of common observation among workers in marine biology that tide-pools vary greatly their biota, depending upon height above low-tide level. In the lower there are many plants and animals epibenthic zone (the from mark to depth 200 metres) which lacking higher up on shore. During seasons I92i I922, while at Atlantic Biological Station, St. Andrews, New Brunswick, I had an opportunity make careful study series obtain data factors affecting biota. The shore front laboratory consists ledges sandstone conglomerate, disposed like steps; between these ledges, concavefaces some them, number tide-pools. Of pools selected six, ranging near high-tide mark, as typical. All shallow pools, less than four decimetres depth. located, being Bay Fundy, has great rise fall tide characteristic body water, amplitude spring 25 feet neap about 8 less. this have connection with water sea severed when reaches following levels: