We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Small-scale patchiness of the phytoplankton in a lentic oxbow.
- Authors
Borics, Gábor; Abonyi, András; Krasznai, Enikő; Várbíró, Gábor; Grigorszky, István; Szabó, Sándor; Deák, Csaba; Tóthmérész, Béla
- Abstract
Horizontal sampling within a lentic oxbow demonstrated the uneven distribution of algae at both large and small scales. An index of heterogeneity is proposed to characterize the fine-scale horizontal patchiness, which is defined as the ratio of the coefficient of variation among samples and the error in counting the algae. Applying a vertical grid sampling strategy, a distinct patchy distribution of several algal species was observed. Most of the patches were formed by those species that have good buoyancy-regulating mechanisms (blue–green algae, dinoflagellates). Atelomixis caused by surface cooling may be the explanation of the heterogeneity. We have shown that the anisotropic horizontal distribution of the phytoplankton could cause high uncertainty in lake quality assessment. Therefore, to improve accuracy composite sampling is needed.
- Subjects
PHYTOPLANKTON; ALGAE; SPECIES distribution; HETEROGENEITY; BIOLOGICAL variation; LAKE ecology; WATER quality
- Publication
Journal of Plankton Research, 2011, Vol 33, Issue 6, p973
- ISSN
0142-7873
- Publication type
Article
- DOI
10.1093/plankt/fbq166