Effects of circadian rhythms of fluctuating temperature on growth and biochemical composition of Ulva pertusa

Wang, Qiaohan; Dong, Shuanglin; Tian, Xiangli; Wang, Fang

doi:10.1007/s10750-007-0700-z

Cited by 16 publications

(9 citation statements)

References 31 publications

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“…That elevated temperature has a positive effect on the carbohydrate content in Ulva spp. is supported by previous studies (Mohsen et al 1973b;Wang et al 2007;He et al 2018). As for irradiance, Mohsen et al (1973a) found that the correlation to carbohydrates is not strictly positive or negative but different for the different carbohydrate components, as was also the case for the monosaccharides in this study.…”

Section: Discussionsupporting

confidence: 91%

“…The impact of some abiotic cultivation factors (temperature, illumination, nutrients, and pCO 2 ) on the carbohydrate composition of Ulva spp. has been investigated previously (Mohsen et al 1973a,;1973b;Gómez Pinchetti et al 1998;Wang et al 2007;Kumari et al 2014;Gao et al 2017Gao et al , 2018He et al 2018;Chen et al 2019). However, the total carbohydrate content is sometimes calculated by taking the difference between total weight and other biochemical components, e.g., (Gao et al 2017(Gao et al , 2018, and when carbohydrates are measured directly the resolution is often poor, e.g., (Mohsen et al 1973a(Mohsen et al , 1973bGómez Pinchetti et al 1998;Kumari et al 2014;Chen et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Cultivation conditions affect the monosaccharide composition in Ulva fenestrata

et al. 2020

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In recent years, the interest in using seaweed for the sustainable production of commodities has been increasing as seaweeds contain many potentially worthwhile compounds. Thus, the extraction and refining processes of interesting compounds from seaweeds is a hot research topic but has been found to have problems with profitability for novel applications. To increase the economic potential of refining seaweed biomass, the content of the compounds of interest should be maximized, which can potentially be achieved through optimization of cultivation conditions. In this study, we studied how the monosaccharide composition of the green seaweed species Ulva fenestrata is influenced by the abiotic factors; irradiance, temperature, nitrate, phosphate, and pCO2. It was evident that lower nitrate concentration and cultivation at elevated temperature increased monosaccharide contents. A 70% increase in iduronic acid and a 26% increase in rhamnose content were seen under elevated irradiance and temperature conditions, though the absolute differences in monosaccharide concentration were small. Irradiance and nitrate impacted the ratio between iduronic and rhamnose, which is an indicator of the ulvan structure. These results could potentially be utilized to coax the ulvan towards specific bioactivities, and thus have a considerable impact on a potential biorefinery centered around Ulva.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Cultivation conditions affect the monosaccharide composition in Ulva fenestrata

et al. 2020

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“…During the experiment, the temperature of fresh seawater from sand filter tank was 10–12 °C. To minimize the potential physiological stress caused by temperature fluctuations 6 7 58 , the fresh seawater was heated to 18 °C before use. During the experiment, clams were fed daily with commercial condensed Nannochloropsis sp.…”

Section: Methodsmentioning

confidence: 99%

“…During periods of low tide, intertidal habitants, especially sessile organisms, often face air exposure, resulting in water loss, oxygen deficiency, thermal stress, and limited food supply 1 2 3 . The adaptations of intertidal organisms to cope with extreme environmental changes during tidal cycles have received many attentions 4 5 6 7 8 9 10 11 12 . For example, intertidal bivalves evolved two main strategies to deal with air exposure 1 : continuous anaerobic metabolism during valve closure during air exposure, and 2 intermittent aerobic respiration with periodic gaping 1 4 10 .…”

mentioning

confidence: 99%

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Yin

Chen

Hai

et al. 2017

Sci Rep

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Intertidal organisms, especially the sessile species, often experience long-term periodic air exposure during their lives. Learning the biochemical and physiological responses of intertidal organisms to long-term periodic air exposure and the relationship to duration of air exposure provides insight into adaptation to this variably stressful environment. We studied the Manila clam, Ruditapes philippinarum, an important species in world aquaculture, as a model to evaluate survival, growth, lipid composition, oxygen consumption, oxidative damage, and antioxidant enzyme activity in relation to the duration of air exposure in a long-term (60 days) laboratory study of varying durations of periodic emersion and re-immersion. Our results show: (1) clams undergoing a longer period of air exposure had lower survival and growth compared to those given a shorter exposure, (2) levels of oxidative damage and activities of antioxidant enzymes were higher in all air exposure treatments, but did not increase with duration of air exposure, and (3) the content of docosahexaenoic acid increased with duration of air exposure. Our results can largely be interpreted in the context of the energy expenditure by the clams caused by aerobic metabolism during the daily cycle of emersion and re-immersion and the roles of docosahexaenoic acid against oxidative stress.

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“…The differential mortality could also be envisaged to result from a higher mortality rate of particularly infected snails at the higher temperature. This scenario is, however, unlikely because the prevalence of infection in snails at the end of the experiment was similar in the 2 temperature treatments (17.9°C: 27.0%; 21.2°C: 29.4%).Because snail consumption of algae was measured as the difference between algal mass added at the start and retrieved at the end of the experiment, and because the growth rate of Ulva lactuca is temperature dependent (Wang et al 2007), consumption was corrected for algal growth at both experimental temperatures. This was done by multiplying the average amount of algal mass present during the experiment (g) and the average growth rate of controls (g g -1 start weight d -1…”

mentioning

confidence: 99%

Increasing temperature counteracts the impact of parasitism on periwinkle consumption

Larsen¹,

Mouritsen²

2009

Mar. Ecol. Prog. Ser.

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Parasites often have key structuring roles in natural communities. For instance, trematode infections significantly reduce consumption by the herbivorous gastropod Littorina littorea, in turn affecting the composition of coastal macroalgal communities on which the snail grazes. However, trematodes are extremely sensitive to temperature changes, in that production and release of infective stages (cercariae) from the snail host are strongly accelerated by increasing temperature. Hence, trematode-infected periwinkles may increase their rates of consumption under warmer conditions to support the additional energetic burden exerted through elevated cercarial shedding. We therefore hypothesized that the combined effect of higher temperatures and parasitism may neutralize the negative impact trematodes otherwise have on periwinkle consumption. To test this, we performed a microcosm experiment examining the combined effect of infection and temperature on the snails' consumption of the green macroalgae Ulva lactuca. Our results show an overall positive effect of temperature on consumption by larger periwinkles, but particularly so in trematode-infected specimens. Whereas infected snails consumed less than uninfected ones at 18°C, no difference was evident at 21°C. Hence, the synergy between parasitism and a relevant temperature increase, e.g. in lieu of expected global warming within this century (3°C), may indeed counteract the generally negative impact of trematodes on periwinkle grazing. KEY WORDS: Trematodes · Littorina littorea · Global warming · Synergistic effect · Cercariae · Macroalgae Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 383: [141][142][143][144][145][146][147][148][149] 2009 tive to sites with a high proportion of uninfected snails (Wood et al. 2007). Given that trematodes are thus indirectly capable of structuring the macroalgal community and given that snail-trematode associations are particularly sensitive to temperature (see below), it becomes imperative to elucidate the potential impact of e.g. climate warming on such host -parasite systems.Trematodes are extremely sensitive to temperature change at a crucial step in their often complex life cycles. In the first intermediate host (primarily gastropods), the parasites' infective stages are produced asexually and periodically shed as short-lived, freeswimming cercariae (e.g. Werding 1969). Within the temperature range host and parasite can tolerate, a positive relationship generally exists between cercarial release from the snail and temperature (Kuntz 1947, Rojo-Vázquez & Simón-Martín 1985, Shostak & Esch 1990, Lo & Lee 1996, Umadevi & Madhavi 1997, Mouritsen 2002, Galaktionov et al. 2006, Poulin 2006. Higher temperatures also accelerate the production and maturation process of cercariae within the poikilotherm snail (Ataev 1991). Typically, the rate of physiological processes increases by a factor of 2 to 3 for every 10 degree rise in temperature (Q 10 ) (SchmidtNielsen 1997). Poulin...

show abstract

Effects of circadian rhythms of fluctuating temperature on growth and biochemical composition of Ulva pertusa

Cited by 16 publications

References 31 publications

Cultivation conditions affect the monosaccharide composition in Ulva fenestrata

Cultivation conditions affect the monosaccharide composition in Ulva fenestrata

Physiological performance of the intertidal Manila clam (Ruditapes philippinarum) to long-term daily rhythms of air exposure

Increasing temperature counteracts the impact of parasitism on periwinkle consumption

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