LOCAL EXTIRPATION OF STEPHANODISCUS-NIAGARAE (BACILLARIOPHYCEAE) IN THE RECENT LIMNOLOGICAL RECORD OF LAKE ONTARIO

Authors
JULIUS ML STOERMER EF TAYLOR CM SCHELSKE CL
Citation
Ml. Julius et al., LOCAL EXTIRPATION OF STEPHANODISCUS-NIAGARAE (BACILLARIOPHYCEAE) IN THE RECENT LIMNOLOGICAL RECORD OF LAKE ONTARIO, Journal of phycology, 34(5), 1998, pp. 766-771
Citations number
19
Categorie Soggetti
Plant Sciences","Marine & Freshwater Biology
Journal title
Journal of phycology → ACNP
ISSN journal
00223646
Volume
34
Issue
5
Year of publication
1998
Pages
766 - 771
Database
ISI
SICI code
0022-3646(1998)34:5<766:LEOS(I>2.0.ZU;2-N
Abstract
We investigated microfossil assemblages in recent sediments from nine stations across Lake Ontario. Stephanodiscus niagarae was not present in any of these sediment samples, marking the taxon's extirpation from its type locality. This observation documents the end of a general re duction in size and alteration in valve morphology associated with hab itat disturbance. Stephanodiscus niagarae may have been directly elimi nated from the lake, or sexual reproduction may have been delayed beyo nd the species' ability to sustain numbers through asexual reproductio n.