Plasmatic resistance and rate of respiration and photosynthesis of Zostera marina at different salinities and temperatures

Biebl, Richard; McRoy, C. Peter

doi:10.1007/bf00349344

Cited by 126 publications

(59 citation statements)

References 22 publications

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“…Photosynthesis and respiration rates from plants were determined using a modified light-dark bottle technique (Biebl & McRoy, 1971) after the 10-day incubation in the sulfide treatments. A apical segment of shoots with a weight of 0.5 ± 0.08 g from each treatment was cut and placed in a 250-ml productivity bottle with a magnetic stir bar for both photosynthesis and respiration measurements.…”

Section: Experimental Designmentioning

confidence: 99%

Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus

Cheng

Liang

et al. 2009

Hydrobiologia

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Potamogeton crispus is a cosmopolitan aquatic species and is widely used as a pioneer species for vegetation restoration of eutrophic lakes. However, many restoration projects applying P. crispus turions have not been successful. Earlier studies focused on effects of light and temperature on turion germination. The purpose of this study was to determine whether sediment anoxia and light interactively affected the turion germination and early growth of P. crispus. Anoxic conditions in the experiment were produced by adding sucrose to the sediment. The germination rate of the turions was 68-73% lower in the highly anoxic condition treatment than in the control. Medium light intensity (10% of natural light at the water surface) was more favorable for germination under slightly anoxic conditions than either low or high light intensity. The growth of newly-formed sprouts was also significantly inhibited by sediment anoxia. Photosynthesis and shoot biomass were reduced under sediment anoxia, whereas total chlorophyll content, root biomass, and soluble protein content were highest in the low anoxic condition treatment. Medium light improved net photosynthesis and biomass production of the sprouts. We conclude that turion germination and sprout growth can be significantly inhibited by sediment anoxia. Medium light intensity may alleviate this inhibition by anoxia, but light has little effect when sediment anoxia is severe. For the purposes of vegetation restoration, more attention should be paid to the role of sediment anoxia, and it is necessary to improve sediment and light conditions for turion germination and early growth of P. crispus in eutrophic lakes. These results will contribute to a more complete understanding of turion germination dynamics of P. crispus and will be useful for future restoration programs.

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Section: Experimental Designmentioning

confidence: 99%

Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus

Cheng

Liang

et al. 2009

Hydrobiologia

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“…Although most seagrasses can tolerate short-term salinity fluctuations, salinity variations will significantly affect some of the biochemical processes involved in photosynthesis and growth, determining the biomass, distribution, and productivity of these species (Montague and Ley 1993;Hillman et al 1995;Chesnes and Montague 2001). Experimental studies on seagrass tolerance to salinity changes have shown that most species have optimum productivity at around oceanic salinity (Ogata and Matsui 1965;McMillan and Moseley 1967;Biebl and McRoy 1971;Drysdale and Barbour 1975;Hillman et al 1995;Doering and Chamberlain 1998), though some species have optima at lower salinities (Kamermans et al 1999;van Katwijk et al 1999). These investigations have demonstrated that extreme or suboptimal salinities can produce negative alterations of their photosynthetic rate (Biebl and McRoy 1971;Kerr and Strother 1985;Dawes et al 1987Dawes et al , 1989, metabolism (van Katwijk et al 1999), reproduction (Ramage andSchiel 1998), growth (McMillan andMoseley 1967;Walker 1985;Walker and McComb 1990), and survival (Vermaat et al 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Along with salinity levels, other important environmental factors can vary, such as temperature or pH, also affecting the distribution and growth of several seagrass species (Ogata and Matsui 1965;Biebl and McRoy 1971;Hillman et al 1995). These variations can be natural or produced by certain human activities, such as discharges from a desalination plant.…”

Section: Introductionmentioning

confidence: 99%

“…Brine discharge has an elevated salinity, a relatively high temperature, and low pH (Lattemann and Ho¨pner 2003). Temperature can alter the metabolism or cause mortality at extreme values (Biebl and McRoy 1971;Drysdale and Barbour 1975;Drew 1979;Marsh et al 1986). The principal influence of pH is on the concentration and form of available carbonates (Invers et al 1997), which affect the photosynthesis of marine angiosperms (Beer and Waisel 1979).…”

Section: Introductionmentioning

confidence: 99%

“…The principal influence of pH is on the concentration and form of available carbonates (Invers et al 1997), which affect the photosynthesis of marine angiosperms (Beer and Waisel 1979). Few studies have investigated the effect of interactions or co-variations of these factors on seagrasses (Biebl and McRoy 1971;Dawes et al 1989;Ralph 1999).…”

Section: Introductionmentioning

confidence: 99%

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Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

2005

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The effects of salinity, temperature, and pH variations on growth, survival, and photosynthetic rates of the seagrass Halophila johnsonii Eiseman were examined. Growth and survival responses to salinity were characterized by aquarium experiments in which plants were exposed to seven different salinity treatments (0, 10, 20, 30, 40, 50, and 60 psu) during 15 days. Photosynthetic behavior was assessed for short-term salinity exposures (1 or 20 h) by incubation experiments in biological oxygen demand (BOD) bottles and by measuring photosynthesis versus irradiance (PI) responses in an oxygen electrode chamber. In the bottle experiments the possible effects of interactions between salinity and temperature (15, 25, and 35°C) or pH (5, 6, 7, and 8.2) were also examined. Growth and survival of H. johnsonii were significantly affected by salinity, with maximum rates obtained at 30 psu. Salinity also altered the parameters of the PI curves. Light-saturated photosynthesis (P max ) and the photosynthetic efficiency at subsaturating light (a) increased significantly up to an optimum of 40 psu, decreasing again at the highest salinities. Dark respiration rates and compensating irradiance (I c ) showed minimum values at 40 and 50 psu, while light-saturation point (I k ) was maximum at 30-50 psu. An interaction between salinity and temperature was not found although an increase of temperature alone produced an increase in a, P max , respiration rates, and I k . An interaction between salinity and pH was only found in the P max response: P max increased with pH=5 at 30 psu. In addition, reducing the pH increased a significantly. In the BOD bottles experiment a significant reduction in the dark respiration with decreasing pH was observed, but the opposite trend was observed in the photosynthetic rate. These results suggest that the endemic seagrass H. johnsonii could be negatively affected by hypo-or hypersalinity conditions, although salinity changes did not seem to alter the tolerance of this species to other environmental factors, such as temperature or pH.

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Zostera: Biology, Ecology, and Management

Moore

Short

Seagrasses: Biology, Ecologyand Conservation

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Plasmatic resistance and rate of respiration and photosynthesis of Zostera marina at different salinities and temperatures

Cited by 126 publications

References 22 publications

Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus

Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Zostera: Biology, Ecology, and Management

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