The phenology of gross ecosystem production in a macroalga and seagrass canopy is driven by seasonal temperature

Hinode, Kenjiro; Punchai, Peeraporn; Saitsu, Mako; Nishihara, Gregory N.; Inoue, Yasuhisa; Terada, Ryuta

doi:10.1111/pre.12433

Cited by 3 publications

(5 citation statements)

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“…Our study was conducted on rocky intertidal reefs at John Brown’s Beach on Japonski Island, Sitka, Alaska, USA (57.06° N, 135.37° W) 60 between September 2018 and September 2019. Measurements spanned a year to capture effects of season and temperature on ecosystem metabolism 61 . Tide pools ( n = 5, randomly selected from pools at the site) ranged from 3 to 28 L in volume, averaging 9.4 ± 4.7 L (mean ± s.e.m.…”

Section: Methodsmentioning

confidence: 99%

Accounting for variation in temperature and oxygen availability when quantifying marine ecosystem metabolism

Miller

Mastroni

Lira

et al. 2022

Sci Rep

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It is critical to understand how human modifications of Earth’s ecosystems are influencing ecosystem functioning, including net and gross community production (NCP and GCP, respectively) and community respiration (CR). These responses are often estimated by measuring oxygen production in the light (NCP) and consumption in the dark (CR), which can then be combined to estimate GCP. However, the method used to create “dark” conditions—either experimental darkening during the day or taking measurements at night—could result in different estimates of respiration and production, potentially affecting our ability to make integrative predictions. We tested this possibility by measuring oxygen concentrations under daytime ambient light conditions, in darkened tide pools during the day, and during nighttime low tides. We made measurements every 1–3 months over one year in southeastern Alaska. Daytime respiration rates were substantially higher than those measured at night, associated with higher temperature and oxygen levels during the day and leading to major differences in estimates of GCP calculated using daytime versus nighttime measurements. Our results highlight the potential importance of measuring respiration rates during both day and night to account for effects of temperature and oxygen—especially in shallow-water, constrained systems—with implications for understanding the impacts of global change on ecosystem metabolism.

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Section: Methodsmentioning

confidence: 99%

Accounting for variation in temperature and oxygen availability when quantifying marine ecosystem metabolism

Miller

Mastroni

Lira

et al. 2022

Sci Rep

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“…Reliable long-term field observations of carbon capture rates by macroalgae ecosystems remains scarce. Presently, most assessments of carbon capture rates rely on extrapolating from chambered photosynthesis experiments of using phytoelements or the whole thallus of macroalgae, measuring the CO 2 flux at the airsea interface and the O 2 flux at the water-sediment interface using eddy covariance techniques (e.g., Berg et al, 2022), extrapolate from simulations and limited in temporal scope (e.g., Watanabe et al, 2020), extrapolate from O 2 mass-balances (e.g., Hinode et al, 2020), measuring the O 2 flux at the water-sediment, and isotopic measurements (e.g., Holtgrieve et al, 2010;Staehr et al, 2012;Hoellein et al, 2013). All methods have both advantages and disadvantages, that must be considered prior to data interpretation.…”

Section: Discussionmentioning

confidence: 99%

“…The instruments were placed so that the majority of the biomass of the seaweed were between the data loggers. Recordings were carried out for four to twenty days before the instruments were retrieved for maintenance and data offloading (e.g., Hinode et al, 2020). Calculations of productivity (as described below) is based on the ensemble mean of the dissolved oxygen time-series recorded by the dataloggers, to account for vertical heterogeneity.…”

Section: Temperature and Dissolved Oxygenmentioning

confidence: 99%

“…At the natural ecosystems, the measurements were taken one meter above the seawater surface by placing the equipment on a floating raft; however, at the seaweed aquaculture farms, the instruments were placed 10 m above ground at nearby boat harbors. Data was recorded for four to twenty days (e.g., Hinode et al, 2020).…”

Section: Light and Wind Speedmentioning

confidence: 99%

“…The gross ecosystem production (GEP) rates and ecosystem respiration (ER) rates were estimated from the diurnal fluctuations of the dissolved oxygen concentration with the open-water method (Hanson et al, 2008;Staehr et al, 2010;Hinode et al, 2020), therefore the data includes not only the physiological processes of photosynthetic organisms, but also includes the respiration of non-photosynthetic organisms (see Gallagher et al, 2022 for details on the processes occurring in open systems). Briefly, the net ecosystem production (NEP) rate can be defined as NEP = GEP + ER, where GEP are positive values and ER are negative values.…”

Section: Estimating Productivitymentioning

confidence: 99%

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Variability in the Net Ecosystem Productivity (NEP) of Seaweed Farms

et al. 2022

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The important role of vegetated ecosystems in the sequestration of carbon has gained strong interest across a wide variety of disciplines. With evidence growing of the potential for macroalgae ecosystems to capture carbon, there is burgeoning interest in applying newfound knowledge of carbon capture rates to better understand the potential for carbon sequestration. Seaweed farms are expected to play a significant role in carbon capture; advocates for the expansion of seaweed farms are increasing in many countries. In general, seaweed farms are expected to be highly productive, although whether they are autotrophic or heterotrophic ecosystems and hence potential exporters of carbon, is under debate. Therefore, we present our investigation of three seaweed farms, two in northern Japan and one in southern Japan. We examine the frequency of autotrophic days and compare potential rates of carbon capture of the seaweed farms with two natural macroalgae ecosystems and one degraded site. We estimated potential carbon capture rates by calculating the net ecosystem productivity from continuous recordings of dissolved oxygen concentrations under natural environmental conditions. The net ecosystem production rates for the natural ecosystems in Arikawa Bay and Omura Bay were equivalent to 0.043 and 0.054 [g C m-2 d-1] m-1, respectively. Whereas, for the degraded ecosystem in Tainoura Bay, it was -0.01 [g C m-2 d-1] m-1. We reveal that the Undaria pinnatifida farm in Matsushima Bay experience autotrophy more often than natural ecosystems, although for seaweed farms producing U. pinnatifida in Hirota Bay and Cladospihon okamuranus at Bise Point, autotrophy was less frequently observed. Nevertheless, up to 14.1 g C m-2 (0.110 g C m-2 d-1) was captured by the production of U. pinnatifida and 3.6 g C m-2 (0.034 g C m-2 d-1) was captured by C. okamuranus, and the total yield of carbon captured during 2021 production season for these farms was 43,385 kg C.

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The phenology of gross ecosystem production in a macroalga and seagrass canopy is driven by seasonal temperature

Cited by 3 publications

References 40 publications

Accounting for variation in temperature and oxygen availability when quantifying marine ecosystem metabolism

Accounting for variation in temperature and oxygen availability when quantifying marine ecosystem metabolism

Blue Carbon: Beyond the Inventory

Variability in the Net Ecosystem Productivity (NEP) of Seaweed Farms

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