Tempo-spatial distribution and species diversity of green algae micro-propagules in the Yellow Sea during the large-scale green tide development

Harmful Algae ◽  
2014 ◽  
Vol 39 ◽  
pp. 40-47 ◽  
Author(s):  
Yan Li ◽  
Wei Song ◽  
Jie Xiao ◽  
Zongling Wang ◽  
Mingzhu Fu ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Species Diversity ◽  
Green Algae ◽  
Yellow Sea ◽  
Large Scale ◽  
The Yellow Sea ◽  
Green Tide

scholarly journals Assessing Herbivorous Impacts of Apohale sp. on the Ulva prolifera Green Tide in China

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiaoxiang Miao ◽  
Jie Xiao ◽  
Shiliang Fan ◽  
Yu Zang ◽  
Xuelei Zhang ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Algal Biomass ◽  
Large Scale ◽  
Algal Growth ◽  
Ulva Prolifera ◽  
The Yellow Sea ◽  
Green Tide ◽  
Species Identity ◽  
Green Tides ◽  
The Southern Yellow Sea

An epiphytic gammarid species, Apohyale sp., was abundant in the floating Ulva prolifera (U. prolifera), which forms large-scale green tides in the Yellow Sea (YSGT). Field observation and laboratory experiments were subsequently conducted to study the species identity, abundance, and grazing effects on the floating algal biomass. The abundance of Apohyale sp. showed great spatial variation and varied from 0.03 to 1.47 inds g−1 in the YSGT. In average, each gram of Apohyale sp. body mass can consume 0.43 and 0.60 g algal mass of U. prolifera per day, and the grazing rates varied among the algae cultured with different nutritional seawaters. It was estimated that grazing of Apohale sp. could efficiently reduce ~0.4 and 16.6% of the algal growth rates in Rudong and Qingdao, respectively. The U. prolifera fragments resulting from gnawing of Apohyale sp. had a higher growth rate and similar photosynthetic activities compared to the floating algae, indicating probably positive feedback on the floating algal biomass. This research corroborated the significant impact of Apohyale sp. on the floating algal mass of YSGT through the top-down control. However, further research is needed to understand the population dynamics of these primary predators and hence their correlation with the expansion or decline of YSGT, especially under the complex food webs in the southern Yellow Sea.

scholarly journals Distribution and species diversity of the floating green macroalgae and micro-propagules in the Subei Shoal, southwestern Yellow Sea

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10538
Author(s):  
Xiaoxiang Miao ◽  
Jie Xiao ◽  
Qinzeng Xu ◽  
Shiliang Fan ◽  
Zongling Wang ◽  
...  
Keyword(s):  
Species Diversity ◽  
Environmental Factors ◽  
Yellow Sea ◽  
Source Region ◽  
The Yellow Sea ◽  
Green Tide ◽  
Distributional Pattern ◽  
Green Tides ◽  
Green Macroalgae ◽  
Subei Shoal

Massive floating green macroalgae have formed harmful green tides in the Yellow Sea since 2007. To study the early development and the associated environmental factors for the green tide, a field survey was carried out in the Subei Shoal, southwestern Yellow Sea. Multiple species were identified in both floating green macroalgae and micro-propagules , while their abundances showed distinct spatial variations. The floating macroalgal biomass was widespread in the northern Subei Shoal and most abundant at 34°N. Ulva prolifera dominated (91.2% in average) the floating macroalgae, and the majority (88.5%) of U. prolifera was the ‘floating type’. In comparison, the micro-propagules were most abundant around the aquaculture rafts, and decreased significantly with the distance to the rafts. The dominant species of micro-propagules was U. linza (48.5%), followed by U. prolifera (35.1%). Their distinct distribution patterns and species diversity suggested little direct contribution of micro-propagules for the floating macroalgae. The spatial variation of the floating macroalgae was probably a combined result from the biomass source and environmental factors, while the abundance of micro-propagules was closely associated with the rafts. A positive correlation between the floating macroalgae and DO was observed and suggested active photosynthesis of the initial biomass in Subei Shoal. This study revealed specific distributional pattern and relationships among the floating macroalgae, micro-propagules and the environmental factors in the source region, which helps understanding the early blooming dynamics of the green tides in Yellow Sea.

scholarly journals Remotely-Observed Early Spring Warming in the Southwestern Yellow Sea Due to Weakened Winter Monsoon

2019 ◽  
Vol 11 (21) ◽  
pp. 2478 ◽  
Author(s):  
Xiangbai Wu ◽  
Qing Xu ◽  
Gen Li ◽  
Yuei-An Liou ◽  
Bin Wang ◽  
...  
Keyword(s):  
Green Algae ◽  
Yellow Sea ◽  
Sea Water ◽  
Submarine Canyon ◽  
Winter Monsoon ◽  
The Yellow Sea ◽  
Green Tide ◽  
Northerly Wind ◽  
Spring Warming ◽  
Sst Variability

The seasonal warming over the southwestern Yellow Sea (YS) in the spring is of vital importance to the local ecologic environment, especially to the massive green algae blooms of the YS in late spring and early summer. Based on daily optimum interpolation sea surface temperature (SST) data consisting of satellite derived SST from Advanced Very High Resolution Radiometer (AVHRR) and in situ measurements, this study analyzed the spring SST variation over the southwestern YS (SWYS) from 1982 to 2018. The results show that the recent warming trend of spring SST over the SWYS is four-to-six times that of the global average, and as a result, sea water over the Subei Shoal (SBS) shifts about 10–13 days earlier to reach 10 °C in early April. This implies that, accordingly, the micro-propagules of green algae over the SBS may have the chance to germinate earlier. SST variability in early April significantly correlates with northerly wind and exhibits a general warming over the SWYS with an intensified warming anchored along the axis of the submarine canyon off the Yangtze estuary. The Moderate Resolution Imaging Spectroradiometer (MODIS) red–green–blue composite images captured the intrusion of the Taiwan Warm Current (TWC) into the SWYS through the submarine canyon during northerly wind relaxation in early April. Ocean remote sensing provides important clues for understanding the regional SST variability in the SWYS. Following this clue, this study finds that the weakening of winter monsoon in the spring leads to northward migration of the TWC and results in enhanced spring warming over the SWYS. The attendant advanced warming in spring, resulting in a favorable temperature condition for early development of green alga, may have contributed to the green tide blooms in the Yellow Sea in the recent decade.

Chemical control of overwintering green algae to mitigate green tide in the Yellow Sea

2021 ◽  
Vol 168 ◽  
pp. 112424
Author(s):  
Ning Gong ◽  
Kuishuang Shao ◽  
Kun Shen ◽  
Yanbin Gu ◽  
Yu'an Liu ◽  
...  
Keyword(s):  
Green Algae ◽  
Yellow Sea ◽  
Chemical Control ◽  
The Yellow Sea ◽  
Green Tide

scholarly journals Monitoring the Dissipation of the Floating Green Macroalgae Blooms in the Yellow Sea (2007–2020) on the Basis of Satellite Remote Sensing

2021 ◽  
Vol 13 (19) ◽  
pp. 3811
Author(s):  
Deyu An ◽  
Dingfeng Yu ◽  
Xiangyang Zheng ◽  
Yan Zhou ◽  
Ling Meng ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Yellow Sea ◽  
Large Scale ◽  
Marine Ecology ◽  
The Yellow Sea ◽  
Green Tide ◽  
Southern Yellow Sea ◽  
Simple Method ◽  
Green Macroalgae ◽  
The Southern Yellow Sea

Large scale green macroalgae blooms (MABs) caused by Ulva prolifera have occurred regularly in the Yellow Sea since 2007. In the MAB dissipation phase, the landing or sinking and decomposition of U. prolifera would alter the physical-chemical environment of seawater and cause ecological, environmental, and economic problems. To understand MAB dissipation features, we used multiple sensors to analyze the spatiotemporal variation of the MAB dissipation phase in the southern Yellow Sea. The results show the variation in the daily dissipation rate (DR) was inconsistent from year to year. Based on the DR variation, a simple method of estimating MAB dissipation days was proposed for the first time. Verification results of the method, from 2018 to 2020, showed the estimated dissipation days were relatively consistent with the results obtained by remote sensing imagery. From 2007 to 2020, the order in which macroalgae landed in the coastal cities of Shandong Peninsula can be roughly divided into two types. In one type, the macroalgae landed first in Rizhao, followed by Qingdao, Rushan, and Haiyang. In the other type, they landed in the reverse order. The MABs annual distribution density showed significant differences in the southern Yellow Sea. These results provided a basis for evaluating the MABs’ impact on marine ecology and formulating the green-tide prevention and control strategies.

scholarly journals Datasets on the spatial distribution of mercury and its controlling factors in the Yellow Sea

Data in Brief ◽  
2021 ◽  
Vol 35 ◽  
pp. 106792
Author(s):  
Do Hyun Jeong ◽  
Wooyoung Jeong ◽  
Saehun Baeg ◽  
Jihun Kim
Keyword(s):  
Spatial Distribution ◽  
Yellow Sea ◽  
Controlling Factors ◽  
The Yellow Sea
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