Depth distribution of oligochaetes in Lake Baikal (Siberia - Russia)

✍ Scribed by Patrick Martin; Boudewijn Goddeeris; Koen Martens

• Book ID: 104639673
• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 522 KB
• Volume: 278
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00142323

✦ Synopsis

In the course of a preliminary sampling program, oligochaetes were collected along two transects in soft sediments in Lake Baikal. The number of oligochaetes present in the samples was counted, without distinguishing between species. The results suggest an exponential decrease in number of individuals (N) relative to depth (11,165 N m-2 at 21 m, 265 N m-2 at 1200 m). Most oligochaetes were found in the top 7 cm of sediment. The orange colour of the sediments suggests a high oxygen availability, even at the greatest water depths.

R&sum6

Au tours d'un programme d'echantillonnage preliminaire, les oligochetes du lac Balkal ont CtC recoltes dans le sediment mou preleve le long de deux transects. Les oligochetes presents dans les Cchantillons ont simplement Cte denombres, saris identification d'especes. Les resultats suggerent une diminution exponentielle du nombre d'individus en fonction de la profondeur du lac (11165 N m -2 a 2 1 m, 265 N m 2 a 1200 m). La plupart des oligochetes ont CtC trouves dans les 7 premiers cm de la couche superieure du sediment. La couleur orangee du sediment suggere une grande disponibilite en oxygene, mCme aux profondeurs les plus grandes.