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Organisms living in this zone have a highly variable and often hostile environment, and have evolved various adaptations to cope with and even exploit these conditions. One easily visible feature of intertidal communities is vertical zonation , where the community is divided into distinct vertical bands of specific species going up the shore.
The intertidal or littoral zone: area between the high and low-tide marks. Can be further divided into high, mid, and low intertidal zones, which are explained below in more depth. [4] The sublittoral or subtidal zone: area below the low-tide mark. The presence and abundance of flora and fauna vary between zones along the rocky shore.
The infralittoral zone is the algal-dominated zone down to around five metres below the low water mark. The circalittoral zone is the region beyond the infralittoral, which is dominated by sessile animals such as oysters. The subtidal zone is the region of the neritic zone which is below the intertidal zone, therefore never exposed to the ...
Marine biologists divide the intertidal region into three zones (low, middle, and high), based on the overall average exposure of the zone. [2] The low intertidal zone, which borders on the shallow subtidal zone, is only exposed to air at the lowest of low tides and is primarily marine in character. The mid intertidal zone is regularly exposed ...
The biotic characteristics are mainly determined by the organisms that occur. For example, wetland plants may produce dense canopies that cover large areas of sediment—or snails or geese may graze the vegetation leaving large mud flats. Aquatic environments have relatively low oxygen levels, forcing adaptation by the organisms found there.
The Ballantine scale is a biologically defined scale for measuring the degree of exposure level of wave action on a rocky shore. Devised in 1961 by W. J. Ballantine, then at the zoology department of Queen Mary University of London, London, U.K., the scale is based on the observation that where shoreline species are concerned "Different species growing on rocky shores require different degrees ...
The littoral zone, also called litoral or nearshore, is the part of a sea, lake, or river that is close to the shore. [1] In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal areas that are permanently submerged — known as the foreshore — and the terms are often used interchangeably.
It can be found a wide range of habitats, ranging from intertidal to subtidal zones. Padina are found to be more prolific in clear waters at a depth of 15–20 m but can be seen up to 110 m in depth, attached to hard substrates or growing as epiphytes on larger seaweeds (e.g. Sargassum). [5]
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