Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis

Lorenzen, Bent; Brix, Hans; McKee, Karen L.; Mendelssohn, Irving A.; Miao, ShiLi

doi:10.1016/s0304-3770(99)00076-5

Cited by 67 publications

(64 citation statements)

References 19 publications

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“…Seed germination in situ has rarely been quantified for C. jamaicense (Alexander, 1971), possibly because germination of C. jamaicense is inherently low, even in controlled environments (van der Valk & Rosburg, 1997;Leeds et al, 2002;Smith et al, 2002). Nevertheless, periods of warming and dry conditions are likely to increase germination (Lorenzen et al, 2000) and probably also enhance rates of seed decay and disappearance. This problem may be partly avoided by counting C. jamaicense seed fragments, which were identifiable in our soils and also have been identified in seedbank studies elsewhere in the Everglades (van der Valk & Rosburg, 1997).…”

Section: Discussionmentioning

confidence: 99%

Using soil profiles of seeds and molecular markers as proxies for sawgrass and wet prairie slough vegetation in Shark Slough, Everglades National Park

et al. 2006

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We measured the abundance of Cladium jamaicense (Crantz) seeds and three biomarkers in freshwater marsh soils in Shark River Slough (SRS), Everglades National Park (ENP) to determine the degree to which these paleoecological proxies reflect spatial and temporal variation in vegetation. We found that C. jamaicense seeds and the biomarkers Paq, total lignin phenols (TLP) and kaurenes analyzed from surface soils were all significantly correlated with extant aboveground C. jamaicense biomass quantified along a vegetation gradient from a C. jamaicense to a wet prairie/slough (WPS) community. Our results also suggest that these individual proxies may reflect vegetation over different spatial scales: Paq and kaurenes correlated most strongly (R 2 =0.88 and 0.99, respectively) with vegetation within 1 m of a soil sample, while seeds and TLP reflected vegetation 0-20 m upstream of soil samples. These differences in the spatial scale depicted by the different proxies may be complementary in understanding aspects of historic landscape patterning. Soil profiles of short (25 cm) cores showed that downcore variation in C. jamaicense seeds was highly correlated with two of the three biomarkers (Paq, R 2 =0.84, p<0.005; TLP, R 2 =0.97, p<0.0001), and all four of the proxies indicated a recent increase in C. jamaicense biomass at the site. Using a preliminary depth-to-age relationship based on matching charcoal peaks with available ENP fire records (1980-present) specific to our coring site, we found that peak-depths in C. jamaicense seed concentration appeared to correspond to recent minimum water levels (e.g., 1989 and 2001), and low seed abundance corresponded to high water levels (e.g., 1995), consistent with the known autecology of C. jamaicense. In summary, the combination of C. jamaicense seeds and biomarkers may be useful for paleoecological reconstruction of vegetation change and ultimately in guaging the success of ongoing efforts to restore historic hydrologic conditions in the South Florida Everglades.

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Section: Discussionmentioning

confidence: 99%

Using soil profiles of seeds and molecular markers as proxies for sawgrass and wet prairie slough vegetation in Shark Slough, Everglades National Park

et al. 2006

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“…The treatment was replicated five times. Low-oxygen treatment was undertaken by employing the method described by Lorenzen et al (2000). Twenty milliliters of double-distillated water (previously flushed for 15 min with N 2 gas) was added and the vials were flushed for 2 min with 800 ml min )1 of the same gas before being sealed.…”

Section: Effect Of Oxygen Availability On Germinationmentioning

confidence: 99%

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

2006

Hydrobiologia

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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.

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“…Colonization of gaps then may not be restrained by inundation. It is known that seeds of various wetland species can readily germinate when submerged (Leck, 1996;Lorenzen et al, 2000;Morinaga, 1926). Since the temperature amplitude is small beneath an insulating cover of water (Thompson et al, 1977) those seeds are not expected to be stimulated by daily temperature fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Germination ecology of three endangered river corridor plants in relation to their preferred occurrence

Geißler

Gzik

2010

Flora - Morphology, Distribution, Functional Ecology of Plants

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Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis

Cited by 67 publications

References 19 publications

Using soil profiles of seeds and molecular markers as proxies for sawgrass and wet prairie slough vegetation in Shark Slough, Everglades National Park

Using soil profiles of seeds and molecular markers as proxies for sawgrass and wet prairie slough vegetation in Shark Slough, Everglades National Park

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

Germination ecology of three endangered river corridor plants in relation to their preferred occurrence

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