Inorganic carbon sources for seagrass photosynthesis: an experimental evaluation of bicarbonate use in species inhabiting temperate waters

Invers, Olga; Zimmerman, Richard C.; Alberte, Randall S.; Pérez, Marta; Romero, Javier

doi:10.1016/s0022-0981(01)00332-x

Cited by 142 publications

(156 citation statements)

References 55 publications

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“…Although healthy, dense seagrass beds are relatively resistant to invasion (Jaubert et al 1999), seagrass and C. taxifolia can co-occur, as was the case at the site we studied. Initial colonization by C. taxifolia is likely to be facilitated by seagrass deterioration due to existing stressors (e.g., nutrient overenrichment, disturbance, and light limitation), but further invasion may be facilitated by a variety of mechanisms (Ceccherelli and Cinelli 1997).…”

Section: Discussionmentioning

confidence: 77%

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Oakes¹,

Bautista²,

Maher³

et al. 2011

Limnology & Oceanography

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Additions of 13 C-labeled macroalgal detritus (Caulerpa taxifolia) and seagrass detritus (Zostera capricorni) to a vegetated intertidal mudflat in subtropical Australia provided insight into the mechanisms and ecosystem effects of C. taxifolia invasions in seagrass beds. Despite the high lability typical of macroalgae, carbon from seagrass detritus was removed from sediments and transferred to benthic compartments (microphytobenthos, bacteria, mud whelks, and live C. taxifolia and Z. capricorni) at a faster rate than carbon from macroalgal detritus. This preference was more pronounced for live Z. capricorni than live C. taxifolia. Whereas rates of dissolved inorganic carbon production and utilization were similar for seagrass and macroalgal detritus, higher fluxes of dissolved organic carbon (DOC) from macroalgal detritus early in the experiment reflected the lower utilization of this carbon pool. Although both seagrass and algae can use DOC as a source of carbon, caulerpenyne may comprise part of the DOC pool leached from C. taxifolia detritus during early degradation. This compound can have allelopathic effects on seagrass and may, therefore, be inaccessible to Z. capricorni. The availability of an additional carbon source for C. taxifolia, generated from its own detritus, represents a competitive advantage for this invasive macroalga over existing seagrass, particularly because seagrass productivity can be carbon-limited. A similar mechanism may exist for other species of invasive macroalga, particularly those that produce toxic secondary metabolites.

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Section: Discussionmentioning

confidence: 77%

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Oakes¹,

Bautista²,

Maher³

et al. 2011

Limnology & Oceanography

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“…Because the CO 2 supply in seawater can be restricted by low solubilities and diffusion rates, seagrasses have adapted to use HCO 3 -, which is the most abundant dissolved inorganic carbon (DIC) in seawater , Beer and Rehnberg 1997, Björk et al 1997, Invers et al 2001). However, the affinity for HCO 3 -has been reported to be lower than that of CO 2 (Björk et al 1997, Invers et al 2001. Seagrasses store carbon products in rhizome tissue in the form of non-structural carbohydrate during high photosynthetic periods, and stored carbon in below-ground tissue then supports the growth and maintenance of plants during periods of low photosynthetic production (Dawes and Lawrence 1980, Durako and Moffler 1985, Pirc 1985, Dawes and Guiry 1992, Lee and Dunton 1996.…”

Section: Introductionmentioning

confidence: 99%

“…Seagrasses can utilize both CO 2 and HCO 3 -for photosynthetic carbon reduction (Durako 1993, Beer and Rehnberg 1997, Invers et al 2001. Because the CO 2 supply in seawater can be restricted by low solubilities and diffusion rates, seagrasses have adapted to use HCO 3 -, which is the most abundant dissolved inorganic carbon (DIC) in seawater , Beer and Rehnberg 1997, Björk et al 1997, Invers et al 2001). However, the affinity for HCO 3 -has been reported to be lower than that of CO 2 (Björk et al 1997, Invers et al 2001.…”

Section: Introductionmentioning

confidence: 99%

“…However, the CO 2 supply for photosynthesis in seawater may be restricted by low solubility and diffusion rates (Björk et al 1997), and thus most of seagrasses utilize HCO 3 -, which is the most abundant form of DIC in seawater (Durako 1993, Beer and Rehnberg 1997, Invers et al 2001. HCO 3 -acquisition into seagrass photosynthetic tissues usually involves extracellular carbonic anhydrase for the formation of CO 2 from HCO 3 -prior to uptake , Beer and Rehnberg 1997, Björk et al 1997, Invers et al 2001. Thus, the affinity of HCO 3 -is lower than that of CO 2 for seagrass photosynthesis.…”

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confidence: 99%

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Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Kim¹,

Kim²,

Kim³

et al. 2012

ALGAE

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Growth dynamics of the seagrass, Zostera marina were examined at the two stations (Myungju and Dagu) in Jindong Bay on the southern coast of Korea. Eelgrass leaf productivities, underwater irradiance, water temperature, dissolved inorganic nitrogen (DIN) in water column and sediments, and tissue carbon (C) and nitrogen (N) content were monitored monthly from March 2002 to January 2004. Underwater irradiance fluctuated highly without a clear seasonal trend, whereas water temperature showed a distinct seasonal trend at both study stations. Water column DIN concentrations were usually less than 5 μM at both study sites. Sediment pore water NH 4 + and NO 3 -+ NO 2 -concentrations were higher at the Myungju site than at the Dagu site. Eelgrass leaf productivity at both study sites exhibited a distinct seasonality, increasing during spring and decreasing during summer. Seasonal variation of eelgrass productivity was not consistent with seasonal patterns of underwater irradiance, or water temperature. Eelgrass tissue C and N content at both study sites also showed significant seasonal variations. Relationships between tissue C and N content and leaf productivities exhibited usually negative correlations at both study sites. These negative correlations implied that the growth of Z. marina at the study sites was probably limited by C and N supplies during the high growth periods.Key Words: growth dynamics; irradiance; nutrient availability; seagrass; temperature; tissue C and N content; Zostera marina INTRODUCTIONSeagrasses are known to play an important role as a primary producer in coastal and estuarine ecosystems (McRoy and McMillan 1977, Zieman and Wetzel 1980, Lee and Dunton 1996. Seagrasses can affect the coastal and estuarine environment by enhancing sedimentation and reducing current and wave energy (Fonseca 1989). Seagrasses also improve water qualities of coasts and estuaries by removing over-enriched inorganic nutrients through leaf uptake McRoy 1984, Lee andDunton 1999). Moreover, seagrass meadows provide habitats for commercially and ecologically valuable marine organisms (Holmquist et al. 1989, Montague andLey 1993). Since seagrass production is essential to support coastal and estuarine ecosystems, examination of seagrass growth dynamics is critical to understand functions and values of seagrass at a certain area in coastal and estuarine ecosystems.The primary productivity of seagrass is usually controlled by underwater irradiance, water temperature, and inorganic nutrient availabilities (Wetzel and Penhale Received July 20, 2012, Accepted August 14, 2012 *Corresponding Author E-mail: klee@pusan.ac.kr Tel: +82-51-510-2255+82-51-510- , Fax: +82-51-581-2962 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 216 be important factors for estimation of whole ...

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“…In this regard, seagrasses are unlike many algae which often have the ability to utilize HCO 3 − as an additional source of inorganic carbon when CO 2 is limiting. For example, most marine algae derive 90% or more of their photosynthetic carbon requirements from HCO 3 − , but marine seagrasses manage to satisfy only ≤50% of their carbon requirements in this way (Zimmerman et al 1995(Zimmerman et al , 1996Beer and Koch 1996;Beer and Rehnberg 1997;Zimmerman et al 1997;Invers et al 2001;Björk et al 1997;Jiang, Huang, and Zhang 2010). In addition, some freshwater SAV species are almost completely reliant on dissolved aqueous CO 2 , and lightsaturated photosynthesis is typically CO 2 -limited in low alkalinity water (Lloyd, Canvin, and Bristow 1977).…”

Section: Coastal Zone Acidificationmentioning

confidence: 99%

Twenty-first century climate change and submerged aquatic vegetation in a temperate estuary: the case of Chesapeake Bay

Arnold

Zimmerman

Engelhardt

et al. 2017

Ecosyst Health Sustain

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Introduction: The Chesapeake Bay was once renowned for expansive meadows of submerged aquatic vegetation (SAV). However, only 10% of the original meadows survive. Future restoration efforts will be complicated by accelerating climate change, including physiological stressors such as a predicted mean temperature increase of 2-6°C and a 50-160% increase in CO 2 concentrations. Outcomes: As the Chesapeake Bay begins to exhibit characteristics of a subtropical estuary, summer heat waves will become more frequent and severe. Warming alone would eventually eliminate eelgrass (Zostera marina) from the region. It will favor native heat-tolerant species such as widgeon grass (Ruppia maritima) while facilitating colonization by non-native seagrasses (e.g., Halodule spp.). Intensifying human activity will also fuel coastal zone acidification and the resulting high CO 2 /low pH conditions may benefit SAV via a "CO 2 fertilization effect." Discussion: Acidification is known to offset the effects of thermal stress and may have similar effects in estuaries, assuming water clarity is sufficient to support CO 2 -stimulated photosynthesis and plants are not overgrown by epiphytes. However, coastal zone acidification is variable, driven mostly by local biological processes that may or may not always counterbalance the effects of regional warming. This precarious equipoise between two forcesthermal stress and acidification -will be critically important because it may ultimately determine the fate of cool-water plants such as Zostera marina in the Chesapeake Bay. Conclusion: The combined impacts of warming, coastal zone acidification, water clarity, and overgrowth of competing algae will determine the fate of SAV communities in rapidly changing temperate estuaries.

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Inorganic carbon sources for seagrass photosynthesis: an experimental evaluation of bicarbonate use in species inhabiting temperate waters

Cited by 142 publications

References 55 publications

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Carbon self‐utilization may assist Caulerpa taxifolia invasion

Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Twenty-first century climate change and submerged aquatic vegetation in a temperate estuary: the case of Chesapeake Bay

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