Strong bottom–up effects on phytoplankton community caused by a rainfall during spring and summer in Sagami Bay, Japan

Baek, Seung Ho; Shimode, Shinji; Kim, Hyun Cheol; Han, Myung-Soo; Kikuchi, Toru

doi:10.1016/j.jmarsys.2008.10.005

Cited by 42 publications

(42 citation statements)

References 36 publications

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“…4). In Sagami Bay, high concentrations of NO 2 +NO 3 and Si(OH) 4 have been observed after heavy rainfall, when the supplies of these nutrients to the coastal regions are related to the increase in freshwater discharge due to precipitation (Fujiki et al 2004, Baek et al 2009). Thus, the significant negative relationships between NO 2 +NO 3 and Si(OH) 4 , and salinity indicate those nutrients were supplied by terrestrial runoff in the present study.…”

Section: Nutrient Originmentioning

confidence: 99%

“…During the study, a summer phytoplankton bloom occurred after 3-4 Satoh et al (2000) days of persistent precipitation of 200 mm or more, and the bloom was dominated by large-sized dinoflagellates, such as Ceratium furca Ehrenberg (Satoh et al 2000). Increase in freshwater discharge due to precipitation results in large loadings of nitrogen and silicate to the coastal area, which leads to phosphorus limitation of primary productivity from spring to summer (Fujiki et al 2004, Baek et al 2009). Although variability in phytoplankton communities and primary production has been documented in the nearshore, western part of Sagami Bay, information on the importance of episodic events remains limited.…”

Section: Introductionmentioning

confidence: 99%

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Typhoon-driven variations in primary production and phytoplankton assemblages in Sagami Bay, Japan: A case study of typhoon Mawar (T0511)

Tsuchiya

Yoshiki

Nakajima

et al. 2013

Plankton Benthos Res

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Climate change has the potential for intensification of typhoons, which will cause stronger effects on aquatic ecosystems in the future. The effect of typhoon Mawar (T0511), passing Manazuru Port located in the western part of Sagami Bay, Japan, was investigated from August to September 2005. Immediately after the passage of Mawar, photosynthetically available radiation showed high values, salinity decreased dramatically and nutrient concentrations (NO 2 +NO 3 , PO 4 and Si(OH) 4 ) increased. Skeletonema spp. and Leptocylindrus spp. were dominant after the passage of Mawar, and their succession was linked to the variability of the N/P ratio. Primary production was highest at 349 mg C m 3 day 1 three days after Mawar, and high assimilation numbers lasted for nine days. The integrated primary production during the nine days after Mawar was 2.1 10 3 mg C m 3 , which accounted for 7.2-9.1% of the annual primary production in the upper waters of Sagami Bay. The study confirms that enhanced primary production induced by episodic typhoon events in temperate coastal regions are significant, and should be considered in annual primary production estimates.

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Section: Nutrient Originmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Typhoon-driven variations in primary production and phytoplankton assemblages in Sagami Bay, Japan: A case study of typhoon Mawar (T0511)

Tsuchiya

Yoshiki

Nakajima

et al. 2013

Plankton Benthos Res

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“…Studies on Noctiluca in the coastal waters of Sagami Bay have dealt with aspects of red tides and/or red coloration phenomena, sometimes having originated in expanded from neighboring Tokyo Bay (Tanaka 1985, Yamada 1997, Kamataki 2005, predominance in the microphytoplankton assemblages (Tatara & Kikuchi 2003, Baek et al 2009, and seasonal and interannual variations in abundance in relation to environmental factors (Miyaguchi et al 2006). However, in these waters as well as other waters of the world, there has been no attempt to investigate the availability of nutrients regenerated by Noctiluca for phytoplankton growth or to evaluate the contribution of nutrient (N and P) supply by Noctiluca excretion to phytoplankton primary production.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variability of the red tide-forming heterotrophic dinoflagellate Noctiluca scintillans in the neritic area of Sagami Bay, Japan: its role in the nutrient-environment and aquatic ecosystem

Ara

Nakamura

Takahashi

et al. 2013

Plankton Benthos Res

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Abstract:The role of the heterotrophic dinoflagellate Noctiluca scintillans in affecting the nutrient-environment and aquatic ecosystem was investigated in the neritic area of Sagami Bay, Kanagawa, Japan, from January 2002 to December 2006, based on abundance, intracellular nutrient content, excretion rate and response of phytoplankton (diatoms) to enrichment of nutrients extracted from N. scintillans cells. Seasonal variations in abundance and vertical distribution of N. scintillans were significantly related to the physical structure of the water column, water temperature, chlorophyll a and primary productivity. Intracellular nutrient contents, except for Si(OH) 4 -Si, revealed clear seasonal fluctuations, which were significantly correlated to cell size variations. Thalassiosira rotula increased to higher cell abundances at higher concentrations of nutrients, which were extracted from N. scintillans cells. NH 4 + -N and PO 4 3--P excretion rates were much higher during the first 1-3 h, and decreased rapidly with time. Daily NH 4 + -N and PO 4 3--P supply by N. scintillans excretion was estimated to be on average 34.8% and 55.3%, especially 50.6-85.4% and 80.5-135.8% in April-July (monthly mean), of the daily N and P requirement for primary production, respectively. The large amounts of nutrients regenerated and released by N. scintillans excretion can increase the N and P concentrations in ambient seawater, especially in the upper layer in spring-summer, and consequently affect phytoplankton (diatom) abundance. These may exacerbate eutrophication in these waters by a mutually supportive relationship between phytoplankton and N. scintillans: bottom-up control (phytoplankton-N. scintillans) and nutrient supply by N. scintillans to phytoplankton through excretion.

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“…; Baek et al . ). Solar radiation and wind influence ocean temperature and stratification, altering the availability of nutrients for phytoplankton (Behrenfeld et al .…”

Section: Introductionmentioning

confidence: 97%

Buffering against food availability? The physical environment has little influence on breeding performance of fairy prions (Pachyptila turtur)

Manno

Loh²,

Heezik

2014

Austral Ecology

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The breeding performance of seabirds is constrained by the availability of marine-based prey, which may be influenced by competition with other seabirds, and environmental conditions. Fairy prion (Pachyptila turtur) populations have declined substantially in New Zealand since the introduction of mammalian predators; remaining small populations provide an opportunity to examine the effect of environmental factors on reproductive success in the absence of competition. Using 11 years of nest monitoring data and eight years of chick measurements we investigated (i) the link between physical environmental factors, breeding success rates and chick fledging size, and (ii) the relationship between chick fledging size and likelihood of natal-colony recapture. Despite annual variations in the Southern Oscillation Index (SOI) and sea surface temperatures (SST), breeding success and chick fledging weights remained similar throughout the entire period, possibly due to the use of behavioural buffering mechanisms by parents. Fledgling wing lengths differed among years, and were predicted by early winter and early spring values of the SOI and late spring and summer SSTs. In years of high SOI and high SST, fairy prions fledged with longer wings, possibly due to increased availability of the euphausiid Nyctiphanes australis, their main prey. River flows and rainfall were unrelated to breeding success or chick measurements: the influence of freshwater on the marine system at this locality acts at smaller timescales than those studied here. Using the 2004 and 2005 cohorts, there was no link between fledging size and likelihood of recapture, except for the 2005 cohort which had unusually low 6-year recapture rates, and shorter-than-average wing lengths. A combination of low sea temperatures and an El Niño event in 2005 may have led to a reduction in euphausiid availability, ultimately affecting post-fledging survival.

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Strong bottom–up effects on phytoplankton community caused by a rainfall during spring and summer in Sagami Bay, Japan

Cited by 42 publications

References 36 publications

Typhoon-driven variations in primary production and phytoplankton assemblages in Sagami Bay, Japan: A case study of typhoon Mawar (T0511)

Typhoon-driven variations in primary production and phytoplankton assemblages in Sagami Bay, Japan: A case study of typhoon Mawar (T0511)

Seasonal variability of the red tide-forming heterotrophic dinoflagellate Noctiluca scintillans in the neritic area of Sagami Bay, Japan: its role in the nutrient-environment and aquatic ecosystem

Buffering against food availability? The physical environment has little influence on breeding performance of fairy prions (Pachyptila turtur)

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