Species pool versus site limitations of macrophytes in urban waters |
| |
Authors: | K Vermonden R S E W Leuven G van der Velde A J Hendriks M M van Katwijk J G M Roelofs E C H E T Lucassen O Pedersen K Sand-Jensen |
| |
Institution: | 1. Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands 2. Freshwater Biological Laboratory, University of Copenhagen, Helsing?rsgade 51, 3400, Hiller?d, Denmark 3. Department of Animal Ecology and Ecophysiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands 4. Netherlands Centre for Biodiversity Naturalis, P.O. Box 9517, 2300 RA, Leiden, The Netherlands 5. Department of Aquatic Ecology and Environmental Biology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands 6. B-WARE Research Centre, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
|
| |
Abstract: | Biodiversity in urban areas is affected by a multitude of stressors. In addition to physico-chemical stress factors, the native
regional species pool can be greatly reduced in highly urbanized landscapes due to area loss and fragmentation. In this study,
we investigated how macrophyte composition and diversity in urban water systems are limited by the regional species pool and
local environmental conditions. Canonical correspondence analysis of the macrophyte species composition revealed that urban
and semi-natural water systems differed and differences could be related to local abiotic variables such as pH and iron concentrations.
Macrophytes in the semi-natural area were typical for slightly acid and oligotrophic conditions. In urban water systems, exotic
species characteristic of eutrophic conditions were present. In the semi-natural areas, the number of macrophyte species exceeded
the number of species expected from species–area relationships of artificial water bodies in rural areas. In urban areas,
the number of macrophyte species was similar to artificial water systems in rural areas. Macrophyte species present in the
study areas also were generally found within 20–30 km distance to the study area. Macrophyte species composition in urban
water systems and semi-natural water systems appeared to be influenced by the regional species pool within approximately 30 km
of the locations. Nevertheless, site limitation ultimately determined the local macrophyte species composition and diversity
in urban water systems and in semi-natural water systems. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|