Abstract
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Canadian Journal of Fisheries and Aquatic Sciences |
| Vol/bind | 57 |
| Sider (fra-til) | 2022-2031 |
| ISSN | 0706-652X |
| Status | Udgivet - 2000 |
Citationsformater
- APA
- Standard
- Harvard
- Vancouver
- Author
- BIBTEX
- RIS
I: Canadian Journal of Fisheries and Aquatic Sciences, Bind 57, 2000, s. 2022-2031.
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
}
TY - JOUR
T1 - Aquatic macrophyte richness in Danish lakes in relation to alkalinity, transparency, and lake area
AU - Vestergaard, Ole Skafte
AU - Sand-Jensen, Kaj
PY - 2000
Y1 - 2000
N2 - We examined the relationship between environmental factors and the richness of submerged macrophytesspecies in 73 Danish lakes, which are mainly small, shallow, and have mesotrophic to hypertrophic conditions. Wefound that mean species richness per lake was only 4.5 in acid lakes of low alkalinity but 12.3 in lakes of high alkalinitydue to a greater occurrence of the species-rich group of elodeids. Mean species richness per lake also increased significantlywith increasing Secchi depth. No significant relationship between species richness and lake surface area wasobserved among the entire group of lakes or a subset of eutrophic lakes, as the growth of submerged macrophytes inlarge lakes may be restricted by wave action in shallow water and light restriction in deep water. In contrast,macrophyte species richness increased with lake surface area in transparent lakes, presumably due to expansion of thearea colonised by submerged macrophytes. Thus, the size of the colonised area is a better predictor of species richnessthan lake surface area. The strong increase in species richness accompanying greater transparency can be accounted forby the combined effect of higher colonised area and higher habitat richness along gradients of deeper macrophytegrowth.
AB - We examined the relationship between environmental factors and the richness of submerged macrophytesspecies in 73 Danish lakes, which are mainly small, shallow, and have mesotrophic to hypertrophic conditions. Wefound that mean species richness per lake was only 4.5 in acid lakes of low alkalinity but 12.3 in lakes of high alkalinitydue to a greater occurrence of the species-rich group of elodeids. Mean species richness per lake also increased significantlywith increasing Secchi depth. No significant relationship between species richness and lake surface area wasobserved among the entire group of lakes or a subset of eutrophic lakes, as the growth of submerged macrophytes inlarge lakes may be restricted by wave action in shallow water and light restriction in deep water. In contrast,macrophyte species richness increased with lake surface area in transparent lakes, presumably due to expansion of thearea colonised by submerged macrophytes. Thus, the size of the colonised area is a better predictor of species richnessthan lake surface area. The strong increase in species richness accompanying greater transparency can be accounted forby the combined effect of higher colonised area and higher habitat richness along gradients of deeper macrophytegrowth.
M3 - Journal article
SN - 0706-652X
VL - 57
SP - 2022
EP - 2031
JO - Canadian Journal of Fisheries and Aquatic Sciences
JF - Canadian Journal of Fisheries and Aquatic Sciences
ER -