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Burrows of Paragnathia (Crustacea: Isopoda) and bledius (Arthropoda: Staphylinidae) enhance cliff erosion
Cadée, G.C.; Checa, A.G.; Rodriguez-Tovar, F.J. (2001). Burrows of Paragnathia (Crustacea: Isopoda) and bledius (Arthropoda: Staphylinidae) enhance cliff erosion. Ichnos 8(3-4): 255-260. https://dx.doi.org/10.1080/10420940109380193
In: Ichnos: an International Journal for Plant and Animal Traces. Harwood Academic Publishers/Taylor & Francis: Reading. ISSN 1042-0940; e-ISSN 1563-5236, meer
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| Trefwoorden |
Isopoda [WoRMS]; Staphylinidae Latreille, 1804 [WoRMS]
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| Author keywords |
Boring organisms, isopods, staphylinid beetles, cliff erosion |
| Auteurs | | Top |
- Cadée, G.C., meer
- Checa, A.G.
- Rodriguez-Tovar, F.J.
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| Abstract |
In coastal cliffs consisting of Pliocene fine‐grained clastic sediments at El Rompido, Huelva, Spain we discovered around the high water line an extensive zone of about 1.5 m in height burrows that were made by up to 4 mm long isopods Paragnathia formica (Hesse) and small 5 mm long staphylinid beetles (Bledius cf. corniger Rosenhauer). The burrowing zone was crowded with irregular burrows 2–5 mm in diameter and extended some 5 cm deep in the cliff. The base of the cliff showed a clear (bio)erosional notch due to this burrowing activity, comparable to those produced by marine boring and scraping organisms in, for example, calcareous rocks. This indicates that the activity of Paragnathia and Bledius helps in eroding the cliffs, a phenomenon not published earlier as far as we know. A comparable but less extensive burrowed zone was found farther upstream near Cartaya. Their presence around the high tide zone also might prove these burrows to be good markers of former high tide lines in older cliffs. |
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