Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Competitive abilities of invasive Lagarosiphon major and native Ceratophyllum demersum in monocultures and mixed cultures in relation to experimental sediment dredging
Stiers, I.; Njambuya, J.; Triest, L. (2011). Competitive abilities of invasive Lagarosiphon major and native Ceratophyllum demersum in monocultures and mixed cultures in relation to experimental sediment dredging. Aquat. Bot. 95(2): 161-166. dx.doi.org/10.1016/j.aquabot.2011.05.011
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522
| |
Author keywords |
Invasive species; Relative growth rate; Competition; Aquatic vegetation management; Aquatic ecosystem; Sediment dredging |
Auteurs | | Top |
- Stiers, I.
- Njambuya, J.
- Triest, L.
|
|
|
Abstract |
Competitive abilities of Lagarosiphon major (Ridley) Moss (invasive in Belgium) and native Ceratophyllum demersum L. were assessed experimentally in relation to sediment dredging. We mimicked these conditions by taking undisturbed sediment ('before dredging' treatment) and by using restored sediment where the uppermost nutrient rich top layer was removed ('after dredging' treatment). Both the species were allowed to grow for seven weeks in monocultures and mixed cultures at different planting densities. Overall, invasive L. major performed better than native C. demersum independent of the characteristics of the growth environment. L. major achieved a higher relative growth rate (RGR) in both treatments based on total length (0.17-0.21 week-1) and weight (0.10-0.19 week-1) compared to C. demersum (length: 0.04-0.07 week-1; weight: 0.03-0.17 week-1). The better performance of L. major was due to a high plasticity under stressful conditions of low free CO2 and high pH. Intraspecific competition and niche partitioning were observed between the two species indicating that species coexistence is favoured instead of competitive exclusion. L. major performed better in the 'after dredging' treatment. Consequently, we deduce that sediment dredging will not lead to a decline of the invasive L. major. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.