DEVELOPMENT OF A METHOD FOR MEASURING THE PRODUCTIVITY OF THE KELP<i>ECKLONIA MAXIMA</i>(Osbeck) Papenf

Mann, K. H.; Jarman, N. G.; Dieckmann, Gerhard

doi:10.1080/00359197909520077

Cited by 31 publications

(16 citation statements)

References 4 publications

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“…In E. m a xima, the dry mass of frond is 15 O/ O of the wet mass, whilst the carbon is 29.3 O/O of the dry mass, and the energetic content in kJ is 15.9 g-' dry frond (Mann et al 1979). Comparable data for Laminana pallida have been assembled in Table 10 from data of Dieckmann (1978) and Field et al (1977).…”

Section: Discussion: Quantitative Significance Of Dissolved Organic Csupporting

confidence: 53%

“…Calculation of the significance of energy released in mucilage based on data of Mann et al (1979) recalculated for the frond biomass of Ecklonia maxima and of Field et al (1977) for that of Laminaria pallida are also included in Table 10 and yield similar values to those cited above. It should be emphasised, however, that both standing crop and biomass to production ratio are subject to considerable variation with both depth and community structure.…”

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 78%

“…Values for standing crop and production of Ecklonia maxima have been assembled in Table 10 from data supplied by N. G. Jarman (personal communication) and recalculated from Mann et al (1979). In E. m a xima, the dry mass of frond is 15 O/ O of the wet mass, whilst the carbon is 29.3 O/O of the dry mass, and the energetic content in kJ is 15.9 g-' dry frond (Mann et al 1979).…”

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 99%

“…That is, for 1 g dry weight eroded from the tip of the frond of L. pallida, there are 6.816 m1 of mucilage which is equivalent to 3.727 kJ (or 8 g of wet tissue contain 3.72 kJ energy in mucilage). Field et al (1977); that for E, maxima based on recalculations from Mann et al (1979) assuming a biomass: production of 1 :4, and from unpublished data' kindly made available by N. G. Jarman. The calculated energetic contribution of dissolved organic matter released during fragmentation of the kelp is also shown together with its relative significance as a percentage of total energy production as growth.…”

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 99%

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Quantitative Significance of Dissolved Organic Losses Following Fragmentation of Kelp (Ecklonia maxima and Laminaria pallida)

Newell¹,

Lucas²,

Velirnirov³

et al. 1980

Mar. Ecol. Prog. Ser.

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Kelp Ecklonia maxima and Laminaria pallida both undergo fragmentation from the tip and thus release structural components as particulate matter and a dissolved fraction from the cell contents into the water column. Analysis of the dissolved fraction released as mucilage from kelp during fragmentation yielded a 92-94 '10 gravimetric recovery comprising 4.74-5.27 "it, protein, 0.17-0.18 "/3 fat, 7.17-7.56 "/o sugar and polyols, 4.77-5.01 '/o alginate and 4.6-7. Energy released as dissolved organic components during kelp fragmentation amounts to approximately 34 '/Q of the total annual energy production of L. pallida and 16-17 O/O of that by E. maxima. Total particulate energy production from both species in a small kelp bed of 700 ha is estimated as 43.25 X 10'' kJ y-', whereas that released as dissolved organic matter amounts to 10.74 X 101° kJy-l. This is equivalent to 20.24 X 107 1 mucilage released year-' during fragmentation into the shallow water of the kelp bed, to which should be added undetermined losses of mucilage from the surface of the fronds. Studies of the concentration of dissolved organic matter in the water near a kelp bed suggest that the exudate released during fragmentation is rapidly utilised within 24 h by microheterotrophic organisms rather than by phytoplankton.

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Section: Discussion: Quantitative Significance Of Dissolved Organic Csupporting

confidence: 53%

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 78%

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 99%

Section: Discussion: Quantitative Significance Of Dissolved Organic Cmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative Significance of Dissolved Organic Losses Following Fragmentation of Kelp (Ecklonia maxima and Laminaria pallida)

Newell¹,

Lucas²,

Velirnirov³

et al. 1980

Mar. Ecol. Prog. Ser.

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“…The distal ends of blades can erode rapidly or gradually, producing detrital fragments that range from small particulates to large sections of blade. Dissolved organic matter is released as kelp blades fragment and erode, and is estimated to account for 16 to 35% of annual energy production in kelps (Johnston et al 1977, Hatcher et al 1977, Mann et al 1979, Newell et al 1980.…”

Section: Production Of Kelp Detritusmentioning

confidence: 99%

Production and fate of kelp detritus

Krumhansl

Scheibling²

2012

Mar. Ecol. Prog. Ser.

378

341

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The flow of detritus between habitats is an important form of connectivity that affects regional productivity and the spatial organization of marine ecosystems. Kelps form highly productive beds or forests that produce detritus through incremental blade erosion, fragmentation of blades, and dislodgement of whole fronds and thalli. Rates of detrital production range from 8 to 2657 g C m −2 yr −1 for blade erosion and fragmentation, and from 22 to 839 g C m −2 yr −1 for loss of fronds and thalli. The estimated global average rate of detrital production by kelps is 706 g C m , accounting for 82% of annual kelp productivity. Detrital production rates are regulated by current and wave-driven hydrodynamic forces and are highest during severe storms and following blade weakening through damage by grazers and encrusting epibionts. Detritus settles within kelp beds or forests and is exported to neighboring or distant habitats, including sandy beaches, rocky intertidal shores, rocky and sedimentary subtidal areas, and the deep sea. Exported kelp detritus can provide a significant resource subsidy and enhance secondary production in these communities ranging from tens of meters to hundreds of kilometers from the source of production. Loss of kelp biomass is occurring worldwide through the combined effects of climate change, pollution, fishing, and harvesting of kelp, which can depress rates of detrital production and subsidy to adjacent communities, with large-scale consequences for productivity.KEY WORDS: Kelp bed · Kelp forest · Connectivity · Detritus · Resource subsidy · Local-regional productivity Resale or republication not permitted without written consent of the publisher

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Growth and Production of the Seaweed, Himantothallus grandifolius, at King George Island

Dieckmann

Reichardt²,

Zieliński

1985

Antarctic Nutrient Cycles and Food Webs

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DEVELOPMENT OF A METHOD FOR MEASURING THE PRODUCTIVITY OF THE KELPECKLONIA MAXIMA(Osbeck) Papenf

Cited by 31 publications

References 4 publications

Quantitative Significance of Dissolved Organic Losses Following Fragmentation of Kelp (Ecklonia maxima and Laminaria pallida)

Quantitative Significance of Dissolved Organic Losses Following Fragmentation of Kelp (Ecklonia maxima and Laminaria pallida)

Production and fate of kelp detritus

Growth and Production of the Seaweed, Himantothallus grandifolius, at King George Island

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