Dual processes for cross-boundary subsidies: incorporation of nutrients from reef-derived kelp into a seagrass ecosystem

Hyndes, Glenn A.; Lavery, Paul S.; Doropoulos, Christopher

doi:10.3354/meps09367

Cited by 34 publications

(43 citation statements)

References 56 publications

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“…Other organic tracers include individual amino acids, amino acid mixtures, or combined amino acids produced in algal cultures, purines, pyrimidines, adenosine triphosphate (ATP), whole DNA, acetamide, and creatine, among others. In addition, 15 N-labeled DON has also been produced in situ by growing plankton on 15 NH 4 + or 15 NO 3 − (Bronk and Glibert, 1993a;Veuger et al, 2004), from Trichodesmium grown on 15 N 2 gas , by growing kelp on 15 NH 4 + (Hyndes et al, 2012), or by adding 15 N-labeled NH 4 + to the sediment where Spartina alterniflora is grown to produce labeled humic substances (See and Bronk, 2005;See et al, 2006).…”

Section: Measuring Uptake Ratesmentioning

confidence: 99%

Dynamics of Dissolved Organic Nitrogen

Sipler¹,

Bronk²

2015

Biogeochemistry of Marine Dissolved Organic Matter

119

128

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Section: Measuring Uptake Ratesmentioning

confidence: 99%

Dynamics of Dissolved Organic Nitrogen

Sipler¹,

Bronk²

2015

Biogeochemistry of Marine Dissolved Organic Matter

119

128

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“…Most studies focus primarily on kelp subsidies to consumers. The potential for kelp to subsidize primary producers was only recently demonstrated (Hyndes et al 2012). Kelps rapidly leach nutrients during microbial breakdown , contributing to the nutrient pool available to nearby primary producers.…”

Section: Conclusion and Recommendations For Future Researchmentioning

confidence: 99%

“…When given a choice, herbivores and detritivores that inhabit temperate seagrass beds preferentially consume kelp and other macroalgae over seagrasses , Doropoulos et al 2009). Stable isotope analysis shows that seagrass is a less important dietary source than imported and autochthonous macroalgae, periphyton, and epiphytic algae in seagrass food webs (Stephenson et al 1986, Hyndes et al 2012. Doropoulos et al (2009) suggest that the importance of macroalgal subsidies to seagrass consumers varies seasonally in response to changing levels of production by autochthonous macroalgae and periphyton.…”

Section: Soft-sediment Habitatmentioning

confidence: 99%

“…Wernberg et al (2006) documented large deposits of detrital kelp within seagrass beds hundreds of meters from a kelp source in southwestern Australia. Seagrasses and seagrass epiphytes assimilate kelp-derived nitrogen that is leached during detrital breakdown (Hyndes et al 2012). Kelp deposits also attract assemblages of herbivores, which in some locations consume most of the detritus within days (Wernberg et al 2006).…”

Section: Soft-sediment Habitatmentioning

confidence: 99%

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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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“…Transport of DOC and POC from coastal vegetated intertidal habitats such as mangrove, seagrass, and seaweed can also occur via dissolved or particular matter, through migration of animals from intertidal to subtidal areas, and through a series of predator-prey interactions (trophic relay) (Kneib 1997;Bouillon and Connolly 2009). High rates of DOC loss through leaching occur rapidly following detachment of macrophyte leaves or thalli (Maie et al 2006;Hyndes et al 2012). POC and DOC along with nekton provide major vectors of carbon transfer across ecosystems within seascapes, and water movement plays a major role in facilitating transfer of carbon regardless of the vector (Hyndes et al 2014).…”

Section: Seaweeds and Sabs Capabilities In Co 2 Sequestrationmentioning

confidence: 99%

Carbon dioxide mitigation potential of seaweed aquaculture beds (SABs)

et al. 2016

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Seaweed aquaculture beds (SABs) that support the production of seaweed and their diverse products, cover extensive coastal areas, especially in the Asian-Pacific region, and provide many ecosystem services such as nutrient removal and CO 2 assimilation. The use of SABs in potential carbon dioxide (CO 2 ) mitigation efforts has been proposed with commercial seaweed production in China, India, Indonesia, Japan, Malaysia, Philippines, Republic of Korea, Thailand, and Vietnam, and is at a nascent stage in Australia and New Zealand. We attempted to consider the total annual potential of SABs to drawdown and fix anthropogenic CO 2 . In the last decade, seaweed production has increased tremendously in the Asian-Pacific region. In 2014, the total annual production of Asian-Pacific SABs surpassed 2.61 × 10 6 t dw. Total carbon accumulated annually was more than 0.78 × 10 6 t y −1 , equivalent to over 2.87 × 10 6 t CO 2 y −1 . By increasing the area available for SABs, biomass production, carbon accumulation, and CO 2 drawdown can be enhanced. The conversion of biomass to biofuel can reduce the use of fossil fuels and provide additional mitigation of CO 2 emissions. Contributions

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Dual processes for cross-boundary subsidies: incorporation of nutrients from reef-derived kelp into a seagrass ecosystem

Cited by 34 publications

References 56 publications

Dynamics of Dissolved Organic Nitrogen

Dynamics of Dissolved Organic Nitrogen

Production and fate of kelp detritus

Carbon dioxide mitigation potential of seaweed aquaculture beds (SABs)

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