- Tytuł:
- Subfossil shell margins and tail spines of Daphnia in Finnish lake sediments - is Daphnia underrepresented in cladocera analysis?
- Autorzy:
- Sarmaja- Korjonen, Kaarina
- Powiązania:
- https://bibliotekanauki.pl/articles/2026810.pdf
- Data publikacji:
- 2007
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
subfossil Daphnia remains
tail spines
shell margins
lake sediments
Finland - Opis:
- One of the short com ings of the analy sis of sub fos sil Cla do cera (wa ter flee) re mains is that pres er va tion of re mains is se lec tive. Of Daph nia spp. which are very com mon in zoo plank ton as sem blages of lakes, usu ally only postab domi nal claws and ephip pia are found. In the pres ent pa per I de scribe Daph nia shell mar gins and some tail spines from the Holo cene sedi ments of a lake in south ern Fin land where the mar gins were much more abun dant than the postab dominal claws, in di cat ing that postab domi nal claws may be un der rep re sented. Daph nia claws, shell mar gins and tail spines were found also in sur face sam ples of 17 Fin nish lakes and thus the abun dance of tail spines could be com pared with that of postab domi nal claws. The re sults showed that in most cases the tail spines are more abun dant than postab domi - nal claws and may give a closer es ti mate of the true abun dance of Daph nia. How ever, in some lakes claws were clearly more fre quent than tail spines. Ap par ently, there are dif fer ences in pres er va tion of dif fer ent types of Daph nia re mains be tween lakes, pos si bly con nected with wa ter chem is try. Over all, the re sults in di cate that proba bly Daph nia re mains are al ways un der rep re sented in lake sedi ments.
- Źródło:
-
Studia Quaternaria; 2007, 24; 61-64
1641-5558
2300-0384 - Pojawia się w:
- Studia Quaternaria
- Dostawca treści:
- Biblioteka Nauki
Artykuł