|Bioerosion of intertidal limestone, Co. Clare, Eire: 1. Paracentrotus lividus|Trudgill, S.T.; Smart, P.L.; Friederich, H.; Crabtree, R.W. (1987). Bioerosion of intertidal limestone, Co. Clare, Eire: 1. Paracentrotus lividus. Mar. Geol. 74(1-2): 85-98. dx.doi.org/10.1016/0025-3227(87)90007-7
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227; e-ISSN 1872-6151, meer
Aquatic organisms > Boring organisms
Paracentrotus lividus (Lamarck, 1816) [WoRMS]
|Auteurs|| || Top |
- Trudgill, S.T.
- Smart, P.L.
- Friederich, H.
- Crabtree, R.W.
The boring sea urchin, Paracentrotus lividus, is widely distributed in the mid and lower intertidal zones on Carboniferous Limestone in Co. Clare, Eire. Erosion rates have been estimated from the measurement of excavation depth and the counting of growth rings on the test (shell). The rates ranged from 0.25–1.5 cm a-1 on an exposed shore to 0–1.0 cm a-1 on a sheltered site; larger, older individuals were commoner on the exposed site. The distribution, activities and geomorphological significance of the organisms are discussed, together with the validity of the procedures adopted to estimate erosion rates. It is clear that Paracentrotus is a major factor in pool deepening in the mid-intertidal zone and in weakening the rock mass in the lower intertidal, especially when Paracentrotus erosion rates are compared with general surface lowering rates of 0.2 mm a-1.