Responses of four Indo-West Pacific seagrass species to shading

Collier, Catherine; Waycott, Michelle; Ospina, Ana Giraldo

doi:10.1016/j.marpolbul.2011.06.017

Cited by 118 publications

(98 citation statements)

References 48 publications

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“…In transition season, condition of environmental variables was relatively stable. Generally, there were no extreme environmental variables found for seagrass growth requirements (Hena et al, 2001;Campbell et al, 2006;Ochieng et al, 2010;Unsworth et al, 2010;Collier et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Carbon Stock of Seagrass Community in Barranglompo Island, Makassar (Stok Karbon pada Komunitas Lamun di Pulau Barranglompo, Makassar)

et al. 2014

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Section: Resultsmentioning

confidence: 99%

Carbon Stock of Seagrass Community in Barranglompo Island, Makassar (Stok Karbon pada Komunitas Lamun di Pulau Barranglompo, Makassar)

et al. 2014

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“…Under decreased irradiances (e.g. at 20 in comparison with 5 m depth), this seagrass shows increased photochemical energy conversion efficiency (α); this is a common strategy of marine angiosperms when they are subjected to chronic light deprivation (Collier et al 2012), including C. nodosa (Silva et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…For example, increasing turbidity in coastal areas alters the dominance and functioning of seascapes dominated by submersed vegetation, particularly those constituted by marine angiosperms (seagrasses) (Duarte et al 2008, Silva et al 2013. Understanding the physiological response of seagrasses and accompanying seaweeds to altered light regimes is therefore important (Collier et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Photo-physiological performance and short-term acclimation of two coexisting macrophytes (<em>Cymodocea nodosa</em> and <em>Caulerpa prolifera</em>) with depth

et al. 2016

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Summary:Marine macrophytes are vertically distributed according to their ability to optimize their photosynthetic performance. We assessed the photo-physiological performance of the seagrass Cymodocea nodosa and the green seaweed Caulerpa prolifera at varying depth at Gran Canaria Island (Canary Islands, eastern Atlantic). The biomass of C. nodosa decreases with depth, while the opposite occurs for C. prolifera. Photochemical responses of both macrophytes were measured in shallow (5 m) and deep (20 m) waters at two times via chlorophyll a fluorescence and internal content of photoprotective pigments and antioxidant activity. We additionally carried out a reciprocal transplant experiment by relocating shallow and deep vegetative fragments of both macrophytes to assess their short-term photo-physiological acclimation. Overall, C. nodosa behaves as a 'light-plant', including a larger optimum quantum yield and ETR max under scenarios of high photosynthetically active radiation and a larger antioxidant activity. In contrast, C. prolifera is a 'shade-adapted' plant, showing a larger carotene content, particularly in shallow water. Deep-water C. nodosa and C. prolifera are more photochemically efficient than in shallow water. The alga C. prolifera shows a rapid, short-term acclimation to altered light regimes in terms of photosynthetic efficiency. In conclusion, decreased light regimes favour the photosynthetic performance of the green alga when both species coexist.Keywords: macroalgae; seagrass; photoacclimation; photo-biology; photoprotection; Atlantic Ocean.Rendimiento foto-fisiológico y aclimatación a corto plazo de dos macrófitos coexistentes (Cymodocea nodosa y Caulerpa prolifera) con la profundidad Resumen: Los macrófitos marinos se distribuyen verticalmente de acuerdo a sus capacidades para optimizar su rendimiento fotosintético. Evaluamos el rendimiento foto-fisiológico de la fanerógama marina Cymodocea nodosa y el alga verde Caulerpa prolifera a diferentes profundidades en la isla de Gran Canaria (Islas Canarias, Atlántico oriental). La biomasa de C. nodosa decrece con la profundidad, mientras que para C. prolifera ocurre lo contrario. Las respuestas foto-químicas de ambos macrófitos se midieron en aguas someras (5 m) y profundas (20 m), en dos tiempos, a través de la fluorescencia de la clorofila a y los contenidos internos en pigmentos fotoprotectores y la actividad antioxidante. Además, ejecutamos un experimento de trasplante recíproco, recolocando fragmentos vegetativos de ambos macrófitos entre aguas someras y profundas para determinar su aclimatación a corto plazo. En general, C. nodosa se comporta como "planta de sol", con mayor rendimiento cuántico óptimo y ETR max bajo escenarios de alta radiación PAR y mayor actividad antioxidante. Contrariamente, C. prolifera es una "planta de sombra", mostrando mayor cantidad de carotenos, en particular a poca profundidad. Ejemplares profundos de ambos macrófitos son más eficientes foto-químicamente que los de aguas someras. El alga C. prolifera muestra una aclim...

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“…The LAI was < 1 for all species, which classifies the leaf packing within the seagrass canopy as monolayered (Enríquez and Pantoja-Reyes 2005). Low LAI is indicative of species with the capacity to reduce self-shading, and potentially represents an adaptation strategy to low light environments (Coles et al 1996, Collier et al 2012). However, light was likely not limiting in shallow water in the midshelf GBR.…”

Section: Shoot Density Shoot Length and Laimentioning

confidence: 99%

Spatial and temporal variability of seagrass at Lizard Island, Great Barrier Reef

Saunders¹,

Bayraktarov

Roelfsema

et al. 2015

Botanica Marina

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Increasing threats to natural ecosystems from local and global stressors are reinforcing the need for baseline data on the distribution and abundance of organisms. We quantified spatial and/or temporal patterns of seagrass distribution, shoot density, leaf area index, biomass, productivity, and sediment carbon content in shallow water (0-5 m) at Lizard Island, Great Barrier Reef, Australia, in field surveys conducted in December 2011 and October 2012. Seagrass meadows were mapped using satellite imagery and field validation. A total of 18.3 ha of seagrass, composed primarily of Thalassia hemprichii and Halodule uninervis, was mapped in shallow water. This was 46% less than the area of seagrass in the same region reported in 1995, although variations in mapping methods may have influenced the magnitude of change detected. There was inter-annual variability in shoot density and length, with values for both higher in 2011 than in 2012.Seagrass properties and sediment carbon content were representative of shallow-water seagrass meadows on a mid-shelf Great Barrier Reef island. The data can be used to evaluate change, to parameterize models of the impact of anthropogenic or environmental variability on seagrass distribution and abundance, and to assess the success of management actions.

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Responses of four Indo-West Pacific seagrass species to shading

Cited by 118 publications

References 48 publications

Carbon Stock of Seagrass Community in Barranglompo Island, Makassar (Stok Karbon pada Komunitas Lamun di Pulau Barranglompo, Makassar)

Carbon Stock of Seagrass Community in Barranglompo Island, Makassar (Stok Karbon pada Komunitas Lamun di Pulau Barranglompo, Makassar)

Photo-physiological performance and short-term acclimation of two coexisting macrophytes (<em>Cymodocea nodosa</em> and <em>Caulerpa prolifera</em>) with depth

Spatial and temporal variability of seagrass at Lizard Island, Great Barrier Reef

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