Change search
ReferencesLink to record
Permanent link

Direct link
Hydrology, shore morphology and species traits affect seed dispersal, germination and community assembly in shoreline plant communities
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Show others and affiliations
2014 (English)In: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 102, no 4, 998-1007 p.Article in journal (Refereed) Published
Abstract [en]

1. Seed dispersal and germination are two primary processes influencing plant community assembly. On freshwater shores, water levels regulate both processes. However, it is still unclear how water levels, shore morphology and species traits interactively affect seed dispersal and germination, and how these interactions determine plant community assembly. We hypothesize that a drawdown water regime enhances seed establishment compared to a year-round stable water level, that this increases species richness and diversity, and that this is modulated by species traits and shore morphology. 2. Germination of 20 wetland plant species with different dispersal capacities (floating capacity expressed as seed floatation half-time) and soil moisture preferences for germination (Ellenberg F) was tested on artificial shores in 24 outdoor ponds in two complementary experiments over 8 weeks. The 'dispersal experiment' tested the effect of water regime on recruitment of hydrochorously dispersing seeds. The 'seed bank experiment' tested the effect of water regime on germination from a sown seed bank, on steep and gradual shores. 3. In the dispersal experiment, the drawdown regime increased recruitment and species richness. Longer floating species colonized a larger shoreline section. Soil moisture preference for germination did not determine colonization patterns. 4. In the seed bank experiment, the drawdown regime increased the number of seedlings on gradual sloping shores, but not on steep shores. The number of germinating seedlings corresponded to the area subjected to the drawdown regime in both shore types. Species richness was not affected by water regime or shore morphology, and species traits did not determine shoreline colonization. Most seeds germinated in moist soil conditions for all species. 5. Synthesis. A spring drawdown instead of stable water regime stimulates establishment of hydrochorously dispersing seeds in temperate wetlands, leading to higher species richness and diversity. Germination from the seed bank is more affected by water regime and shore surface than by the tested species traits. Species traits, water levels and shore morphology together determine wetland plant community assembly, with dispersal as the main driver of seedling community diversity. Water-level regulations and shore morphology can be used to influence plant communities in wetland restoration.

Place, publisher, year, edition, pages
2014. Vol. 102, no 4, 998-1007 p.
Keyword [en]
biodiversity, determinants of plant community diversity and structure, Ellenberg, hydrochory, river, seed floatation, shore slope, soil moisture preference, wetland, zonation
National Category
URN: urn:nbn:se:umu:diva-91266DOI: 10.1111/1365-2745.12250ISI: 000338027500017OAI: diva2:735687
Available from: 2014-07-30 Created: 2014-07-28 Last updated: 2014-07-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Sarneel, Judith M.
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Journal of Ecology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 95 hits
ReferencesLink to record
Permanent link

Direct link