Burial limits to the emergence of aquatic plant propagules

Dugdale, Tony M.; Winton, Mary de; Clayton, J. S.

doi:10.1080/00288330.2001.9516984

Cited by 25 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In many cases a long or repeated exposure to light is required by small seeds (Frankland et al, 1987). A light gradient with depth may be responsible for the effect of burial on seed germination (Dugdale et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Germination Requirement of Vallisneria natans Seeds: Implications for Restoration in Chinese Lakes

2006

Hydrobiologia

View full text Add to dashboard Cite

Due to eutrophication submerged macrophytes have disappeared from many Chinese lakes. This is unfortunate as submerged macrophytes are important to improve water quality, and its re-establishment is therefore desirable. For this purpose a potential method to use is re-seeding, this being particularly attractive due to the high seed productivity of V. natans. We conducted laboratory studies to investigate the effects of five environmental variables (temperature, substratum, oxygen, light availability, and burial depth) on the seed germination of V. natans. Our results showed that a wide temperature range (25-35°C) was favorable for germination; that seeds germinated well under both gravel and silt; that anaerobic condition proved to accelerate seed germination although the final germination percentage did not rise; and that light and burial acted as limiting factors. These results suggest that V. natans is a potential candidate for successful restoration of vegetation in lakes recovering from eutrophication.

show abstract

Section: Discussionmentioning

confidence: 99%

Germination Requirement of Vallisneria natans Seeds: Implications for Restoration in Chinese Lakes

2006

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…Each sample consisted of three sediment cores, collected using a corer (5 cm internal diameter), collected at random within a 1-m-diameter circle. As we aimed to identify the propagules that could potentially be recruited in the following spring, only the top 5 cm of sediment was kept, as this is likely to be the maximum depth at which germination can take place (Dugdale, De Winton & Clayton, 2001).…”

Section: Sampling the Propagule Bankmentioning

confidence: 99%

Effect of light stress from phytoplankton on the relationship between aquatic vegetation and the propagule bank in shallow lakes

et al. 2012

View full text Add to dashboard Cite

1. The way light stress controls the recruitment of aquatic plants (phanerogams and charophytes) is a key process controlling plant biodiversity, although still poorly understood. Our aim was to investigate how light stress induced by phytoplankton, that is, independent from the aquatic plants themselves, determines the recruitment and establishment of plant species from the propagule bank. The hypotheses were that an increase in light stress (i) decreases abundance and species richness both of established aquatic plants and of propagules in the bank and (ii) decreases the recruitment success of plants from this bank.2. These hypotheses were tested in 25 shallow lakes representing a light stress gradient, by sampling propagule banks before the recruitment phase and when the lakes are devoid of actively growing plants (i.e. at the end of winter), established vegetation at the beginning of the summer and phytoplankton biomass (chlorophyll a) during the recruitment and establishment phase. 3. The phytoplankton biomass was negatively correlated with the richness and abundance of established vegetation but was not correlated with the propagule bank (neither species richness nor propagule abundance). The similarity between the propagule bank and established vegetation decreased significantly with increasing phytoplankton biomass. 4. The contrast in species composition between the vegetation and the propagule bank at the highest light stress suggests poor recruitment from the propagule bank but prompts questions about its origin. It could result from dispersal of propagules from neighbouring systems. Propagules could also originate from a persistent propagule bank formerly produced in the lake, suggesting strong year-to-year variation in light stress and, as a consequence, in recruitment and reproductive success of plants.

show abstract

“…Sampling stations were evenly distributed along the sites. Only the upper 5 cm of the cores was used because this depth is usually considered as the maximum from which the germination of species involved in short-term vegetation regeneration can take place (Dugdale et al 2001). The 15 cores were thoroughly mixed and divided into three subsamples which were subjected to three treatments: (1) inundation: sediment permanently flooded under 4 cm of water collected from the wetland, (2) exposure: sediment maintained at saturation point, (3) mixture: sediment maintained at saturation point for one month and then re-flooded under 4 cm of site water.…”

Section: Propagule Bankmentioning

confidence: 99%

Propagule banks and regenerative strategies of aquatic plants

Combroux

Bornette

2004

J Veg Sci

View full text Add to dashboard Cite

The role of the propagule bank in aquatic plant maintenance was studied in two riverine wetlands. Four sites were selected, characterized respectively by flooding, drying up, both disturbances operating, and neither operating. Our hypothesis was that recolonization after drying up would mostly involve seeds and buds from the propagule bank, whereas recolonization after floods would mostly involve rhizomes. Dry sites were characterized by a high density of seeds, and a high similarity between seed species and established vegetation. Unspecialized fragments remaining in wet parts of the sediment probably also contribute to species maintenance. Species maintenance in sites subjected to flooding was highly dependent on deeply anchored rhizomes, as indicated by the strong floristic similarity between species that occur in the established vegetation and rhizomes in the bank. Regeneration of the community after scouring floods also involved seeds, some species being able to flower under water. When scouring flooding and drying up were superimposed, regenerative strategies exhibited in the bank did not simply result from the 'addition' of the two disturbance effects. When the disturbances did not occur too closely together in time, species were able to survive either by: (1) producing many propagules under aquatic conditions or (2) coping with the temporal variability by producing several types of propagules.

show abstract

Burial limits to the emergence of aquatic plant propagules

Cited by 25 publications

References 11 publications

Germination Requirement of Vallisneria natans Seeds: Implications for Restoration in Chinese Lakes

Germination Requirement of Vallisneria natans Seeds: Implications for Restoration in Chinese Lakes

Effect of light stress from phytoplankton on the relationship between aquatic vegetation and the propagule bank in shallow lakes

Propagule banks and regenerative strategies of aquatic plants

Contact Info

Product

Resources

About