Buoyancy potential of dominant green macroalgal species in the Yellow Sea's green tides, China

Fu, Mingzhu; Fan, Shiliang; Wang, Zongling; Song, Wei; Sun, Kai-Ming; Han, Hao; Xiao, Jie; Shen, Song Dong

doi:10.1016/j.marpolbul.2019.01.056

Cited by 25 publications

(4 citation statements)

References 47 publications

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“…Red algae are good models to test these hypotheses as they have limited dispersal. Unlike brown algae like Sargassum, which have air bladders providing positive buoyancy, or free-floating green algae such as Ulva, red algae do not rely on their vegetative structure for dispersal (Graham et al, 2008;Fu et al, 2019). Additionally, red algae lack flagella during their entire life cycle, relying mainly on water currents and the attachment and growth of spores on various substrates to spread and colonize new areas (Cole and Sheath, 1990).…”

Section: Introductionmentioning

confidence: 99%

Seaweed diversification driven by Taiwan’s emergence and the Kuroshio Current: insights from the cryptic diversity and phylogeography of Dichotomaria (Galaxauraceae, Rhodophyta)

Fontana,

Wang,

Tseng

et al. 2024

Front. Ecol. Evol.

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Ocean currents play a role in both facilitating and impeding connectivity of marine organisms’ populations, serving as key drivers and potential barriers. The emergence of Taiwan around five million years ago (Mya) impacted the Kuroshio Current which later shaped the distribution of marine organisms. In this study, we examined how the Kuroshio Current influenced the distribution and population divergence of the marine red alga Dichotomaria elegans (Galaxauraceae, Nemaliales). Through phylogenetic analysis, species delimitation, and morphological comparison of Taiwanese species, we determined its phylogenetic position relative to other species within the D. marginata complex of the genus Dichotomaria. We uncovered the hidden cryptic diversity within the D. marginata complex in Taiwan and proposed the new combinations D. elegans and D. latifolia based on Galaxaura elegans and G. latifolia. Genetic analysis based on three loci (mitochondrial cox2-3 and cox1, and plastid rbcL) from 32 locations across the Philippines, Taiwan, and Japan revealed three allopatric lineages within D. elegans. The first lineage is restricted to the northern Philippines and southern Taiwan, while the second has a broader latitudinal range along the Kuroshio Current. The third lineage is found in southeast Luzon, Philippines, close to the bifurcation of the North Equatorial Current, near the start of the Kuroshio Current. The divergence of the first two lineages during the mid-Pliocene (~3.7 Mya) coincided with the emergence of Taiwan, with the current dynamics accentuating their separation. The Kuroshio Current exhibited a dual impact on the biogeography of D. elegans: promoting the dispersal of the second lineage towards higher latitudes and preventing the first lineage from moving northward. Principal component analysis showed that habitat conditions and morphologies differed between the two D. elegans lineages. This study provides insights into the cryptic diversity of Dichotomaria in Taiwan, as well as the genetic divergence, biogeographical patterns, and ecological associations of D. elegans, highlighting the interplay of island formation and currents shaping the diversification of seaweeds in the Northwest Pacific Ocean.

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Section: Introductionmentioning

confidence: 99%

Seaweed diversification driven by Taiwan’s emergence and the Kuroshio Current: insights from the cryptic diversity and phylogeography of Dichotomaria (Galaxauraceae, Rhodophyta)

Fontana,

Wang,

Tseng

et al. 2024

Front. Ecol. Evol.

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“…The Yellow Sea Green Tide originates from the Porphyra aquaculture at the Jiangsu Shoal in the southern Yellow Sea. After the harvest of the Porphyra seaweed, large quantities of green tide algae attached to the aquaculture raft scopes are manually cleaned and reenters the sea via the tide (Fu et al, 2019). This algae continue to reproduce (Liu et al, 2015;Xiao et al, 2016), drifting northward under the influence of wind and waves (Son et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Research on the dissipation of green tide and its influencing factors in the Yellow Sea based on Google Earth Engine

Gao

2021

Marine Pollution Bulletin

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“…Since 2007, green tides with Ulva prolifera as the dominant species have occurred every summer in the Yellow Sea (Fu et al. 2019, Xiao et al. 2019).…”

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confidence: 99%

“…This study supports NRA is a suitable proxy of the effects of temperature changes on the ability of Ulva prolifera to uptake and metabolize nitrogen nutrients. Key index words: Ulva prolifera; growth rate; nitrate reductase activity; temperature Abbreviations: ARGR, the average relative growth rate; ARGRmax, the maximum ARGR; NO 2 -NCIAI, the concentration of intracellular nitrite in U. prolifera; NO 3 -NCIAI, intracellular nitrate concentrations in U. prolifera; NO 3 -NCIM, the nitrate concentration in culture medium; NR, nitrate reductase; NRA, Nitrate reductase activity; NRAmax, the maximal NRA; PMS, phenazine methosulfate; RGR, the relative growth rate; RGRmax, the maximum RGR; Wwmax, the maximal Ww Since 2007, green tides with Ulva prolifera as the dominant species have occurred every summer in the Yellow Sea (Fu et al 2019). The massive free-floating macroalgal blooms of U. prolifera in the Yellow Sea have caused severe ecological and economic damage (Sellner et al 2003, Tian et al 2011, Liu and Zhou 2018.…”

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confidence: 99%

Effects of temperature on the nitrate reductase activity and growth of Ulva prolifera

Feng

Shi

Chen

et al. 2021

Journal of Phycology

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To better understand the effect of temperature on the growth and nitrate reductase activity (NRA) of Ulva prolifera and their relationships, the effects of five different temperatures (10, 15, 20, 25, and 30°C) were investigated in a laboratory setup. In this study, an optimization in vitro analysis method for Ulva prolifera NRA was developed. Under different treatments, the NRA, nitrate concentration, pH, the intracellular nitrate and nitrite concentrations, and the POC/PON were evaluated. The results of the in vitro analysis method showed it was optimal for the NRA assay when the extraction time was 6 min, enzymatic reaction time 30 min, volume of phenazine methosulfate (PMS) solution 50 μL, NADH concentration 0.36 mM, and KNO3 concentration 10 mM. The maximal NRA (NRAmax) appeared on the 2nd day in the 10, 15, and 20°C (low‐temperature) groups and on the 1st day in the 25 and 30°C (high‐temperature) groups. The algal growth ended earlier at a high temperature, ending after 5 d at 30 and 25°C and 7 d at 20°C and 9 d at 15°C, and the alga at 10°C had been growing during the incubation period. Ulva prolifera cultivated in a range of 10–20°C had a long growth cycle and the NRA decreased with increasing temperature when exceeded 15°C, a positive correlation between algal growth and NRA was observed. This study supports NRA is a suitable proxy of the effects of temperature changes on the ability of Ulva prolifera to uptake and metabolize nitrogen nutrients.

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Buoyancy potential of dominant green macroalgal species in the Yellow Sea's green tides, China

Cited by 25 publications

References 47 publications

Seaweed diversification driven by Taiwan’s emergence and the Kuroshio Current: insights from the cryptic diversity and phylogeography of Dichotomaria (Galaxauraceae, Rhodophyta)

Seaweed diversification driven by Taiwan’s emergence and the Kuroshio Current: insights from the cryptic diversity and phylogeography of Dichotomaria (Galaxauraceae, Rhodophyta)

Research on the dissipation of green tide and its influencing factors in the Yellow Sea based on Google Earth Engine

Effects of temperature on the nitrate reductase activity and growth of Ulva prolifera

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