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Journal articles on the topic 'Diatom adaptations for low light'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Steinitz-Kannan, Miriam, Jerry H. Carpenter, and Mark A. Nienaber. "A biofilm micro-community dominated by the diatom Campylodiscus neofastuosus (Surirellales) binds detritus used as food source for rare brittle stars endemic to two Bahamian caves." Subterranean Biology 51 (May 16, 2025): 197–212. https://doi.org/10.3897/subtbiol.51.141192.

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The rare endemic brittle star Amphicutis stygobita (Echinodermata: Ophiuroidea: Amphilepididae) is found in Bernier Cave on San Salvador Island in The Bahamas. We report here on the diatom-rich detritus on which the brittle star feeds. The detritus contains a microbial biofilm dominated by a large diatom Campylodiscus neofastuosus Ruck & Nakov that thrives in the cave’s brackish water. The biofilm diatoms and bacteria produce sticky, carbohydrate-rich, extracellular polymeric substances (EPS) that add to the detritus’ nutritional value and help give the detritus a consistency for A. stygob

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Steinitz-Kannan, Miriam, Jerry H. Carpenter, and Mark A. Nienaber. "A biofilm micro-community dominated by the diatom Campylodiscus neofastuosus (Surirellales) binds detritus used as food source for rare brittle stars endemic to two Bahamian caves." Subterranean Biology 51 (May 16, 2025): 197–212. https://doi.org/10.3897/subtbiol.51.141192.

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The rare endemic brittle star <i>Amphicutis stygobita</i> (Echinodermata: Ophiuroidea: Amphilepididae) is found in Bernier Cave on San Salvador Island in The Bahamas. We report here on the diatom-rich detritus on which the brittle star feeds. The detritus contains a microbial biofilm dominated by a large diatom <i>Campylodiscus neofastuosus</i> Ruck & Nakov that thrives in the cave's brackish water. The biofilm diatoms and bacteria produce sticky, carbohydrate-rich, extracellular polymeric substances (EPS) that add to the detritus' nutritional value and help give the detritus a consistency

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3

Hoffmann, L. J., I. Peeken, and K. Lochte. "Co-limitation by iron, silicate, and light of three Southern Ocean diatom species." Biogeosciences Discussions 4, no. 1 (2007): 209–47. http://dx.doi.org/10.5194/bgd-4-209-2007.

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Abstract. The effect of combined iron, silicate, and light co-limitation was investigated in two Southern Ocean diatom species, Chaetoceros dichaeta and Actinocyclus sp. and one cosmopolitan species, Chaetoceros debilis, all isolated in the Southern Ocean (SO). We found species specific differences in the level of nutrient limitation and its effect on physiological and morphological parameters. Growth of all species tested was clearly co-limited by iron and silicate, reflected in a 4 to 40 times higher increase in cell numbers in the high iron, high silicate treatments compared with the contro

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4

Lacour, Thomas, Jade Larivière, Joannie Ferland, et al. "Photoacclimation of the polar diatom Chaetoceros neogracilis at low temperature." PLOS ONE 17, no. 9 (2022): e0272822. http://dx.doi.org/10.1371/journal.pone.0272822.

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Polar microalgae face two major challenges: 1- growing at temperatures (-1.7 to 5°C) that limit enzyme kinetics; and 2- surviving and exploiting a wide range of irradiance. The objective of this study is to understand the adaptation of an Arctic diatom to its environment by studying its ability to acclimate to changes in light and temperature. We acclimated the polar diatom Chaetoceros neogracilis to various light levels at two different temperatures and studied its growth and photosynthetic properties using semi-continuous cultures. Rubisco content was high, to compensate for low catalytic ra

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Lelekov, Alexander S., and Rudolf P. Trenkenshu. "Modeling of photosynthesis light curves by linear splines." Hydrosphere Еcology (Экология гидросферы), no. 2(4) (2019): 20–29. http://dx.doi.org/10.33624/2587-9367-2019-2(4)-20-29.

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The paper presents an example of the linear splines use to describe the photosynthesis light curves for microalgae culture. The main mathematical models of the relationship between photosynthesis rate and light are listed. Based on the previously formulated basic principles of modeling microalgae photobiosynthesis, a mathematical model is proposed that describes the dependence of the assimilation number of chlorophyll a on the value of the light flux by linear splines. The advantage of the proposed approach is a clear definition of the point of change of the limiting factor. It is shown that l

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Bartual, Ana, and J. Angel Gálvez. "Short- and long-term effects of irradiance and CO2 availability on carbon fixation by two marine diatoms." Canadian Journal of Botany 81, no. 3 (2003): 191–200. http://dx.doi.org/10.1139/b03-013.

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Unbuffered and nutrient-replete dilute batch cultures of Skeletonema costatum Cleve and Phaeodactylum tricornutum Bohlin were grown at high and low CO2 availability conditions and two incident irradiances, 150 and 30 µmol photons·m2·s1. Long-term combined effects of such light and CO2 availability conditions on carbon fixation rates of both diatoms were compared. At saturating light, P. tricornutum showed higher photosynthetic rates than S. costatum at both CO2 conditions. However, under subsaturating light, carbon fixation rates of P. tricornutum were higher than observed for S. costatum on

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7

Li, G., and D. A. Campbell. "Interactive effects of and light on growth rates and RUBISCO content of small and large centric diatoms." Biogeosciences Discussions 12, no. 20 (2015): 16645–72. http://dx.doi.org/10.5194/bgd-12-16645-2015.

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Abstract. Among marine phytoplankton groups, diatoms span the widest range of cell size, with resulting effects upon their nitrogen uptake, photosynthesis and growth responses to light. We grew two strains of marine centric diatoms, the small Thalassiosira pseudonana and the larger T. punctigera in high and low nitrogen media, across a range of growth light levels. Nitrogen and total proteins per cell decreased with increasing growth light in both species when grown under low nitrogen media. Surprisingly, low nitrogen increased the cellular allocation to RUBISCO and the rate of electron transp

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Bayramova, E. M., Ye D. Bedoshvili, and Ye V. Likhoshway. "Molecular and cellular mechanisms of diatom response to environmental changes." Limnology and Freshwater Biology, no. 1 (2023): 20–30. http://dx.doi.org/10.31951/2658-3518-2023-a-1-20.

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Abstract. The review is devoted adaptations of diatom under environmental changes and stress factors. Life cycle of diatoms is influenced by various environmental changes, including changes in light intensity, temperature, nutrient availability, and exposure to infochemicals, algicidal bacteria, and viruses. During evolution diatoms have evolved many molecular pathways to respond to stress factors: altering their metabolism to react on abiotic stressors, or producing secondary metabolites to protect themselves from competitors and predators. Prolonged exposure to a stress factor leads to a var

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Dawson, H. M., K. R. Heal, A. Torstensson, L. T. Carlson, A. E. Ingalls, and J. N. Young. "Large Diversity in Nitrogen- and Sulfur-Containing Compatible Solute Profiles in Polar and Temperate Diatoms." Integrative and Comparative Biology 60, no. 6 (2020): 1401–13. http://dx.doi.org/10.1093/icb/icaa133.

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Synopsis Intense bottom-ice algal blooms, often dominated by diatoms, are an important source of food for grazers, organic matter for export during sea ice melt, and dissolved organic carbon. Sea-ice diatoms have a number of adaptations, including accumulation of compatible solutes, that allows them to inhabit this highly variable environment characterized by extremes in temperature, salinity, and light. In addition to protecting them from extreme conditions, these compounds present a labile, nutrient-rich source of organic matter, and include precursors to climate active compounds (e.g., dime

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FUREY, PAULA C., KALINA M. MANOYLOV, and REX L. LOWE. "New and interesting aerial diatom assemblages from southwestern Iceland." Phytotaxa 428, no. 3 (2020): 173–208. http://dx.doi.org/10.11646/phytotaxa.428.3.2.

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Examination of algal assemblages from aerial environments around the globe, especially those from pseudoaerial habitats found on moistened rocks underneath waterfalls or around springs and seeps, reveals the presence of unique diatom floras. Yet, diatom assemblages from northern regions like Iceland remain understudied, especially those from the volcanic rock outcrops and boulders that create euaerial habitats where biota receive moisture from the atmosphere or the rock itself. During the summers of 2013 and 2015, we examined the biodiversity of mostly euaerial, but also pseudoaerial, diatom a

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Wang, Xiaodong, Xuan Che, Xingguo Liu, et al. "The Range of the Colonial Microcystis’ Biomass for Shift to Diatom Aggregates Under Aeration Mixing and Low Light." Diversity 16, no. 11 (2024): 695. http://dx.doi.org/10.3390/d16110695.

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In order to investigate non-cyanobacteria dominance succession from Microcystis blooms, particularly to diatom dominance, an experiment using varying colonial Microcystis biomasses expressed as bulk concentrations of 2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0, 16.0, 18.0, 20.0, 22.0, and 24.0 mL L−1 was undertaken under continuous aeration mixing in a greenhouse during a hot summer where shading had reduced light level by 97%. The results showed that the algal shift process was affected by the initial biomass of the colonial Microcystis, and the algal community diversified. When the Microcystis bulk

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12

Prelle, Lara R., and Ulf Karsten. "Photosynthesis, Respiration, and Growth of Five Benthic Diatom Strains as a Function of Intermixing Processes of Coastal Peatlands with the Baltic Sea." Microorganisms 10, no. 4 (2022): 749. http://dx.doi.org/10.3390/microorganisms10040749.

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In light of climate change, renaturation of peatlands has become increasingly important, due to their function as carbon sinks. Renaturation processes in the Baltic Sea include removal of coastal protection measures thereby facilitating exchange processes between peatland and Baltic Sea water masses with inhabiting aquatic organisms, which suddenly face new environmental conditions. In this study, two Baltic Sea and three peatland benthic diatom strains were investigated for their ecophysiological response patterns as a function of numerous growth media, light, and temperature conditions. Resu

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Gao, Kunshan, and Douglas A. Campbell. "Photophysiological responses of marine diatoms to elevated CO2 and decreased pH: a review." Functional Plant Biology 41, no. 5 (2014): 449. http://dx.doi.org/10.1071/fp13247.

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Diatoms dominate nearly half of current oceanic productivity, so their responses to ocean acidification are of general concern regarding future oceanic carbon sequestration. Community, mesocosm and laboratory studies show a range of diatom growth and photophysiological responses to increasing pCO2. Nearly 20 studies on effects of elevated pCO2 on diatoms have shown stimulations, no effects or inhibitions of growth rates. These differential responses could result from differences in experimental setups, cell densities, levels of light and temperature, but also from taxon-specific physiology. Ge

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WATSON, D., S. DAUME, J. PRINCE, L. BEAZLEY, and B. KNOTT. "The influence of culture conditions on the growth and biochemical composition of an algal feed for juvenile greenlip abalone (Haliotis laevigata)." Molluscan Research 25, no. 1 (2005): 1–8. http://dx.doi.org/10.11646/mr.25.1.1.

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The diatom Navicula jeffreyi was cultured in seawater media of low, standard or high nitrate content (2.47, 12.35 and 24.71 mg NO3-N L-1, respectively) in high (22 ± 3 mol photons/m2/s) and low (4.7 ± 0.8 mol photons/m2/s) light conditions. The growth, survival and grazing rates of juvenile Haliotis laevigata Donovan, 1808 were monitored in response to the density and biochemical composition of N. jeffreyi cultured in each of the six treatments. Navicula jeffreyi Hallegraeff et Burford grown in high light had a proportionally lower protein content and a higher carbohydrate and fat content (2

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15

JOHNSON, G. N., F. J. RUMSEY, A. D. HEADLEY, and E. SHEFFIELD. "Adaptations to extreme low light in the fern Trichomanes speciosum." New Phytologist 148, no. 3 (2000): 423–31. http://dx.doi.org/10.1046/j.1469-8137.2000.00772.x.

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16

Larasati, Chandrika Eka, Mujizat Kawaroe, and Tri Prartono. "Characteristics of Diatoms in Strait of Rupat Riau (Karakteristik Diatom di Selat Rupat Riau)." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 20, no. 4 (2015): 223. http://dx.doi.org/10.14710/ik.ijms.20.4.223-232.

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Selat Rupat merupakan selat kecil yang berdekatan dengan Selat Malaka yang memiliki berbagai macam aktivitas antropogenik. Tekanan dari aktivitas tersebut dapat menyebabkan perubahan kondisi lingkungan perairan sehingga dapat berpengaruh pada organisme laut khususnya kelimpahan diatom. Penelitian ini bertujuan untuk menganalisis karakteristik lingkungan perairan yang memengaruhi kelimpahan diatom di permukaan Perairan Selat Rupat. Penelitian ini dilaksanakan di Selat Rupat Riau dengan 5 stasiun yang berbeda karakteristik lingkungannya pada saat pasang dan surut. Parameter yang diukur, yaitu: n

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17

Valieva, Elvira A., Gulnara R. Nigamatzyanova, Niyaz M. Nigmatullin, Danis K. Nurgaliev, and Larisa A. Frolova. "Detailed results of diatom analysis of bottom sediments from lake Big Miassovo (Chelyabinsk region, Russia)." Issues of modern algology (Вопросы современной альгологии), no. 1(28) (2022): 110–16. http://dx.doi.org/10.33624/2311-0147-2022-2(29)-110-116.

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Diatoms are good indicators of a variety of lake water conditions including salinity, pH, light availability, temperature and nutrient levels, but diatoms as palaeoindicators are relatively poorly studied in the Chelyabinsk region. The diatom results of analysis a 498 cm long continuous sediments core from the Lake Big Miassovo (Southern Urals, Russia) are presented. The core was collected in July 2018 from central part of the lake from a depth of 24 m. Diatom analysis of 51 samples revealed 124 taxa, belonging to 47 genera. Diatom diagram has been divided into two diatom zones and five subzon

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18

Smerilli, Arianna, Sergio Balzano, Maira Maselli, et al. "Antioxidant and Photoprotection Networking in the Coastal Diatom Skeletonema marinoi." Antioxidants 8, no. 6 (2019): 154. http://dx.doi.org/10.3390/antiox8060154.

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Little is known on the antioxidant activity modulation in microalgae, even less in diatoms. Antioxidant molecule concentrations and their modulation in microalgae has received little attention and the interconnection between light, photosynthesis, photoprotection, and antioxidant network in microalgae is still unclear. To fill this gap, we selected light as external forcing to drive physiological regulation and acclimation in the costal diatom Skeletonema marinoi. We investigated the role of light regime on the concentration of ascorbic acid, phenolic compounds and among them flavonoids and th

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Marinov, I., S. C. Doney, and I. D. Lima. "Response of ocean phytoplankton community structure to climate change over the 21st century: partitioning the effects of nutrients, temperature and light." Biogeosciences Discussions 7, no. 3 (2010): 4565–606. http://dx.doi.org/10.5194/bgd-7-4565-2010.

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Abstract. The response of ocean phytoplankton community structure to climate change depends upon species competition for nutrients and light, as well as the increase in surface ocean temperature. We propose an analytical framework linking changes in nutrients, temperature and light with changes in phytoplankton growth rates, and we assess our theoretical considerations against model projections (1980–2100) from a global Earth System model. Our proposed ''critical nutrient theory'' suggests that there is a critical nutrient threshold below (above) which a nutrient change will affect more (less)

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Stelmakh, Liudmila, and Tatiana Gorbunova. "Emiliania huxleyi blooms in the Black Sea: influence of abiotic and biotic factors." Botanica 24, no. 2 (2018): 172–84. http://dx.doi.org/10.2478/botlit-2018-0017.

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Abstract Stelmakh L.V., Gorbunova T.I., 2018: Emiliania huxleyi blooms in the Black Sea: influence of abiotic and biotic factors. - Botanica, 24(2): 172-184. The studies were conducted in the Black Sea in deep and shallow water areas in October 2010 and May 2013. The main abiotic and biotic factors, which control spring and autumn coccolithophorid Emiliania huxleyi blooms, were identified. During late May this phenomenon was observed under optimal light and temperature conditions, and also optimal ratio between mineral forms of nitrogen and phosphorus (N/P) in the water. Biotic variables (the

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Goeyers, Charlotte, Dale H. Vitt, and Bart Van de Vijver. "Taxonomic and biogeographical analysis of diatom assemblages from historic bryophyte samples from Campbell Island (sub-Antarctic)." Plant Ecology and Evolution 155, no. 1 (2022): 107–22. http://dx.doi.org/10.5091/plecevo.84543.

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Background and aims – The past two decades, the non-marine diatom flora in the sub-Aantarctic region has been intensively revised. Historic collections provide excellent tools for answering taxonomic, community-related, and biogeographical questions. This study analysed the moss-inhabiting diatom flora from sub-Antarctic Campbell Island in samples collected in 1969–1970 and retrieved from the British Antarctic Survey herbarium (Cambridge, UK). With this study we attempt to expand our, till now sparse, knowledge on the moss-inhabiting diatom flora in the southern Pacific Ocean.Material and meth

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Walter, B., J. Peters, J. E. E. van Beusekom, and M. A. St. John. "Interactive effects of temperature and light during deep convection: a case study on growth and condition of the diatom Thalassiosira weissflogii." ICES Journal of Marine Science 72, no. 6 (2014): 2061–71. http://dx.doi.org/10.1093/icesjms/fsu218.

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Abstract Aim of this study was to expose phytoplankton to growth conditions simulating deep winter convection in the North Atlantic and thereby to assess changes in physiology enabling their survival. Growth rate, biochemical composition, and photosynthetic activity of the diatom Thalassiosira weissflogii were determined under two different light scenarios over a temperature range of 5–15°C to simulate conditions experienced by cells during winter deep convection. These metrics were examined under a low light scenario (20 µmol m−2 s−1, 12/12 h light/dark), and compared with a scenario of short

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Winsborough, Barbara, Philip Winsborough, and Byron Sudbury. "The Diatom Flora of Hall’s Cave, Kerr County, Texas." Journal of Cave and Karst Studies 86, no. 3/4 (2024): 37–56. https://doi.org/10.4311/2019pa0104.

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This paper presents the results of a study to identify the species and distribution of diatoms growing in various habitats and on different substrates in Hall’s Cave, a limestone cave located on the Edward’s Plateau in western Kerr County, central Texas, USA. A diverse diatom assemblage that includes at least seventeen taxa was found growing in low to very low light conditions in different parts of the cave interior and on the walls of the cave entrance. Many other species were found in low numbers and may have been transported into the cave. One diatom species, Nitzschia palmida Carter is dom

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Marinov, I., S. C. Doney, and I. D. Lima. "Response of ocean phytoplankton community structure to climate change over the 21st century: partitioning the effects of nutrients, temperature and light." Biogeosciences 7, no. 12 (2010): 3941–59. http://dx.doi.org/10.5194/bg-7-3941-2010.

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Abstract. The response of ocean phytoplankton community structure to climate change depends, among other factors, upon species competition for nutrients and light, as well as the increase in surface ocean temperature. We propose an analytical framework linking changes in nutrients, temperature and light with changes in phytoplankton growth rates, and we assess our theoretical considerations against model projections (1980–2100) from a global Earth System model. Our proposed "critical nutrient hypothesis" stipulates the existence of a critical nutrient threshold below (above) which a nutrient c

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Walter, B., J. Peters, Beusekom J. E. .E. van, and John M. A. St. "Interactive effects of temperature and light during deep convection: a case study on growth and condition of the diatom Thalassiosira weissflogii." Ices Journal Of Marine Science 72, no. 6 (2015): 2061–71. https://doi.org/10.1093/icesjms/fsu218.

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Aim of this study was to expose phytoplankton to growth conditions simulating deep winter convection in the North Atlantic and thereby to assess changes in physiology enabling their survival. Growth rate, biochemical composition, and photosynthetic activity of the diatom <em>Thalassiosira weissflogii</em> were determined under two different light scenarios over a temperature range of 5–15°C to simulate conditions experienced by cells during winter deep convection. These metrics were examined under a low light scenario (20 µmol m<sup>−2</sup> s<sup>−1</sup>, 12/12 h

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Honkanen, Anna, Esa-Ville Immonen, Iikka Salmela, Kyösti Heimonen, and Matti Weckström. "Insect photoreceptor adaptations to night vision." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1717 (2017): 20160077. http://dx.doi.org/10.1098/rstb.2016.0077.

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Night vision is ultimately about extracting information from a noisy visual input. Several species of nocturnal insects exhibit complex visually guided behaviour in conditions where most animals are practically blind. The compound eyes of nocturnal insects produce strong responses to single photons and process them into meaningful neural signals, which are amplified by specialized neuroanatomical structures. While a lot is known about the light responses and the anatomical structures that promote pooling of responses to increase sensitivity, there is still a dearth of knowledge on the physiolo

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Zahajská, Petra, Rosine Cartier, Sherilyn C. Fritz, et al. "Impact of Holocene climate change on silicon cycling in Lake 850, Northern Sweden." Holocene 31, no. 10 (2021): 1582–92. http://dx.doi.org/10.1177/09596836211025973.

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Diatom-rich sediment in a small subarctic lake (Lake 850) was investigated in a 9400 cal. yr BP sediment record in order to explore the impact of Holocene climate evolution on silicon cycling. Diatom stable silicon isotopes ([Formula: see text]) and biogenic silica (BSi) indicate that high BSi concentrations in sediment throughout the Holocene are associated with a lighter Si isotope source of dissolved silica (DSi), such as groundwater or freshly weathered primary minerals. Furthermore, higher BSi concentrations were favoured during the mid-Holocene by low detrital inputs and possibly a longe

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Matsumoto, Takuma, Kenya Sudo, Ken-Ichiro Ishii, Ayako Imura, and Nobuharu Inaba. "Distribution of Diatom Resting Stages in Sediment near Artificial Reefs Deployed in the Dysphotic Zone: Exploration of New Artificial Reef Function." Applied Sciences 12, no. 19 (2022): 9972. http://dx.doi.org/10.3390/app12199972.

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Artificial reefs (ARs) have multiple beneficial effects involved in increased fishery production. The present study investigated diatom resting stages in the sediments near ARs at a depth of about 90 m by the combined use of direct microscopic observation and the MPN method, seeking a novel function of AR deployment that potentially increases biological production. Although the concentration of diatom resting stages at A2 (north end station of the AR area), composed mainly of Chaetoceros, was ten times the concentration at A5 (non-reef station), the concentration at A1 (south end station of th

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Goeyers, Charlotte, Dale H. Vitt, and de Vijver Bart Van. "Taxonomic and biogeographical analysis of diatom assemblages from historic bryophyte samples from Campbell Island (sub-Antarctic)." Plant Ecology and Evolution 155, no. (1) (2022): 107–22. https://doi.org/10.5091/plecevo.84543.

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<strong>Background and aims</strong> – The past two decades, the non-marine diatom flora in the sub-Aantarctic region has been intensively revised. Historic collections provide excellent tools for answering taxonomic, community-related, and biogeographical questions. This study analysed the moss-inhabiting diatom flora from sub-Antarctic Campbell Island in samples collected in 1969–1970 and retrieved from the British Antarctic Survey herbarium (Cambridge, UK). With this study we attempt to expand our, till now sparse, knowledge on the moss-inhabiting diatom flora in the southern Pacific Ocean.

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Strzepek, Robert F., Philip W. Boyd, and William G. Sunda. "Photosynthetic adaptation to low iron, light, and temperature in Southern Ocean phytoplankton." Proceedings of the National Academy of Sciences 116, no. 10 (2019): 4388–93. http://dx.doi.org/10.1073/pnas.1810886116.

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Phytoplankton productivity in the polar Southern Ocean (SO) plays an important role in the transfer of carbon from the atmosphere to the ocean’s interior, a process called the biological carbon pump, which helps regulate global climate. SO productivity in turn is limited by low iron, light, and temperature, which restrict the efficiency of the carbon pump. Iron and light can colimit productivity due to the high iron content of the photosynthetic photosystems and the need for increased photosystems for low-light acclimation in many phytoplankton. Here we show that SO phytoplankton have evolved

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Heydarizadeh, Parisa, Wafâa Boureba, Morteza Zahedi, et al. "Response of CO 2 -starved diatom Phaeodactylum tricornutum to light intensity transition." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1728 (2017): 20160396. http://dx.doi.org/10.1098/rstb.2016.0396.

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In this study, we investigated the responses of Phaeodactylum tricornutum cells acclimated to 300 µmol m −2 s −1 photon flux density to an increase (1000 µmol m −2 s −1 ) or decrease (30 µmol m −2 s −1 ) in photon flux densities. The light shift occurred abruptly after 5 days of growth and the acclimation to new conditions was followed during the next 6 days at the physiological and molecular levels. The molecular data reflect a rearrangement of carbon metabolism towards the production of phosphoenolpyruvic acid (PEP) and/or pyruvate. These intermediates were used differently by the cell as a

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Kopalova, Katerina, Jana Veselá, Josef Elster, Linda Nedbalová, Jiří Komárek, and de Vijver Bart Van. "Benthic diatoms (Bacillariophyta) from seepages and streams on James Ross Island (NW Weddell Sea, Antarctica)." Plant Ecology and Evolution 145, no. (2) (2012): 190–208. https://doi.org/10.5091/plecevo.2012.639.

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<b>Background and aim</b> – The non-marine diatom communities in the Antarctic Region are characterized by a typical species composition, in close relationship with their environment. Despite the growing interest, the diatom flora of James Ross Island is only poorly known. The present paper discusses the diversity of limnoterrestrial diatoms on this island: seepages and streams. <b>Methods</b> – The diatom flora of 53 samples taken on the eastern side of the Ulu peninsula on James Ross Island has been studied using light and scanning electron microscopy. <b>Key results</b> – A total of 69 diat

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Li, Qinfeng, Zheng He, Hussein E. Rozan, Chao Feng, Xiaojie Cheng, and Xiguang Chen. "An improved blood hemorrhaging treatment using diatoms frustules, by alternating Ca and light levels in cultures." Marine Life Science & Technology 5, no. 3 (2023): 316–25. http://dx.doi.org/10.1007/s42995-023-00180-3.

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AbstractHemorrhage control requires hemostatic materials that are both effective and biocompatible. Among these, diatom biosilica (DBs) could significantly improve hemorrhage control, but it induces hemolysis (the hemolysis rate > 5%). Thus, the purpose of this study was to explore the influence of Ca2+ biomineralization on DBs for developing fast hemostatic materials with a low hemolysis rate. Here, CaCl2 was added to the diatom medium under high light (cool white, fluorescent lamps, 67.5 µmol m−2 s−1), producing Ca-DBs-3 with a particle size of 40–50 μm and a Ca2+ content of Ca-DBs-3 obta

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Guérin, Sébastien, Laura Raguénès, Dany Croteau, Marcel Babin, and Johann Lavaud. "Potential for the Production of Carotenoids of Interest in the Polar Diatom Fragilariopsis cylindrus." Marine Drugs 20, no. 8 (2022): 491. http://dx.doi.org/10.3390/md20080491.

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Carotenoid xanthophyll pigments are receiving growing interest in various industrial fields due to their broad and diverse bioactive and health beneficial properties. Fucoxanthin (Fx) and the inter-convertible couple diadinoxanthin–diatoxanthin (Ddx+Dtx) are acknowledged as some of the most promising xanthophylls; they are mainly synthesized by diatoms (Bacillariophyta). While temperate strains of diatoms have been widely investigated, recent years showed a growing interest in using polar strains, which are better adapted to the natural growth conditions of Nordic countries. The aim of the pre

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Kim, Eunchul, Akimasa Watanabe, Christopher D. P. Duffy, Alexander V. Ruban, and Jun Minagawa. "Multimeric and monomeric photosystem II supercomplexes represent structural adaptations to low- and high-light conditions." Journal of Biological Chemistry 295, no. 43 (2020): 14537–45. http://dx.doi.org/10.1074/jbc.ra120.014198.

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An intriguing molecular architecture called the “semi-crystalline photosystem II (PSII) array” has been observed in the thylakoid membranes in vascular plants. It is an array of PSII–light-harvesting complex II (LHCII) supercomplexes that only appears in low light, but its functional role has not been clarified. Here, we identified PSII–LHCII supercomplexes in their monomeric and multimeric forms in low light–acclimated spinach leaves and prepared them using sucrose-density gradient ultracentrifugation in the presence of amphipol A8-35. When the leaves were acclimated to high light, only the m

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Voit, Andrea C., Richard J. Hebda, Julien M. J. Racca, et al. "Post-glacial diatom-inferred aquatic changes in Sicamous Creek Lake, British Columbia, Canada." Revue des sciences de l’eau 27, no. 3 (2014): 233–56. http://dx.doi.org/10.7202/1027808ar.

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Diatom analyses of sediments from a high elevation lake situated in an Engelmann Spruce - Subalpine Fir (ESSF) forest of south-central British Columbia, Canada, reveal long-term climate and water chemistry change. During the transition from the late-glacial / Pleistocene to the xerothermic early Holocene, small, benthic Fragilaria diatoms species that grew under low light conditions in Sicamous Creek Lake gave way to planktonic Cyclotella species that require open-water conditions. Warm temperatures in the mesothermic Holocene are indicated by smaller Cyclotella species and large, benthic penn

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Rybak, Mateusz, Natalia Kochman-Kędziora, and Łukasz Peszek. "Description of four new terrestrial diatom species from Luticola and Microcostatus genera from South Africa." PhytoKeys 182 (September 14, 2021): 1–26. https://doi.org/10.3897/phytokeys.181.65326.

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The knowledge about terrestrial diatom assemblages in southern Africa is rather limited, despite a long history of diatom research in this area. Terrestrial habitats are places of characteristic diatom floras, dominated by species resistant to desiccation which are able to thrive in conditions of limited water availability. The presented work expands the knowledge about these unique habitats. During the study on terrestrial moss-inhabiting diatoms from Western Cape Province (South Africa), four taxa with a unique set of valve features have been found and described herein as new species, based

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Choiniere, Jonah N., James M. Neenan, Lars Schmitz, et al. "Evolution of vision and hearing modalities in theropod dinosaurs." Science 372, no. 6542 (2021): 610–13. http://dx.doi.org/10.1126/science.abe7941.

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Owls and nightbirds are nocturnal hunters of active prey that combine visual and hearing adaptations to overcome limits on sensory performance in low light. Such sensory innovations are unknown in nonavialan theropod dinosaurs and are poorly characterized on the line that leads to birds. We investigate morphofunctional proxies of vision and hearing in living and extinct theropods and demonstrate deep evolutionary divergences of sensory modalities. Nocturnal predation evolved early in the nonavialan lineage Alvarezsauroidea, signaled by extreme low-light vision and increases in hearing sensitiv

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Bei, Zhanlin, Lulu Lu, Zubayda Amar, and Xin Zhang. "Light Adaptations of Ipomoea purpurea (L.) Roth: Functional Analysis of Leaf and Petal Interfaces." Plants 14, no. 6 (2025): 862. https://doi.org/10.3390/plants14060862.

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In low-light environments, plants face challenges in maximizing light acquisition for growth and reproduction. This study investigates the light-related adaptations of Ipomoea purpurea (L.) Roth, a climbing annual vine commonly known as morning glory. Field and laboratory analyses focused on the functionality of its leaf and petal interfaces. We observed that tendrils of I. purpurea enable it to climb surrounding structures, optimizing light capture. The leaves display absorption peaks at 400 nm and 700 nm, typical for plants that absorb light in the red and blue regions, with microstructural

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Græsholt, Cecilie, Tore Brembu, Charlotte Volpe, et al. "Zeaxanthin epoxidase 3 Knockout Mutants of the Model Diatom Phaeodactylum tricornutum Enable Commercial Production of the Bioactive Carotenoid Diatoxanthin." Marine Drugs 22, no. 4 (2024): 185. http://dx.doi.org/10.3390/md22040185.

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Carotenoids are pigments that have a range of functions in human health. The carotenoid diatoxanthin is suggested to have antioxidant, anti-inflammatory and chemo-preventive properties. Diatoxanthin is only produced by a few groups of microalgae, where it functions in photoprotection. Its large-scale production in microalgae is currently not feasible. In fact, rapid conversion into the inactive pigment diadinoxanthin is triggered when cells are removed from a high-intensity light source, which is the case during large-scale harvesting of microalgae biomass. Zeaxanthin epoxidase (ZEP) 2 and/or

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Karst-Riddoch, Tammy L., Michael FJ Pisaric, Donald K. Youngblut, and John P. Smol. "Postglacial record of diatom assemblage changes related to climate in an alpine lake in the northern Rocky Mountains, Canada." Canadian Journal of Botany 83, no. 8 (2005): 968–82. http://dx.doi.org/10.1139/b05-045.

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We relate changes in diatom assemblages to Holocene climate since ca. 10 300 cal. years BP at a small (4 ha), alkaline, alpine tundra lake in the Rocky Mountains of northeast British Columbia. A complex of small benthic Fragilaria-type taxa generally dominated the fossil diatom communities reflecting shallow, alkaline, and likely low light conditions resulting from minerogenic turbidity or extensive ice cover throughout the Holocene. Shifts in diatom assemblages occurred with changes in local vegetation, inferred from pollen and stomate records, and shifts in charcoal-inferred fire frequency (

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Lazzara, L., I. Nardello, C. Ermanni, O. Mangoni, and V. Saggiomo. "Light environment and seasonal dynamics of microalgae in the annual sea ice at Terra Nova Bay, Ross Sea, Antarctica." Antarctic Science 19, no. 1 (2007): 83–92. http://dx.doi.org/10.1017/s0954102007000119.

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We investigated the physical conditions of the Spring pack ice environment at Terra Nova Bay to understand their influence on the structure and physiology of sympagic microalgae. Bio-optical methods were used to study the availability and spectral quality of solar radiation, both inside and underneath the ice cover. Pack ice thickness was around 2.5 m, with a temperature between −2 and −7°C. On average, only 1.4% of surface PAR penetrated to the bottom ice and less than 0.6% below platelet ice level. Surface UV-B radiation under the bottom ice was 0.2–0.4%. Biomass concentrations up to 2400 mg

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Chattová, Barbora, Marc Lebouvier, Vít Syrovátka, and Bart Van de Vijver. "Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean)." Plant Ecology and Evolution 154, no. 1 (2021): 63–79. http://dx.doi.org/10.5091/plecevo.2021.1767.

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Background and aims – Despite the ongoing taxonomical revision of the entire (sub)-Antarctic diatom flora, our knowledge on the ecology and community associations of moss-inhabiting diatoms is still rather limited. In the present study, our research aim was to survey the diversity together with the environmental factors structuring the epiphytic moss diatom communities on Ile Amsterdam (TAAF), a small volcanic island in the southern Indian Ocean.Material and methods – A morphology-based dataset and (physico)chemical measurements were used for the ecological and biogeographical analysis of moss

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Chattová, Barbora, Marc Lebouvier, Vít Syrovátka, and de Vijver Bart Van. "Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean)." Plant Ecology and Evolution 154, no. (1) (2021): 63–79. https://doi.org/10.5091/plecevo.2021.1767.

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<b>Background and aims</b> – Despite the ongoing taxonomical revision of the entire (sub)-Antarctic diatom flora, our knowledge on the ecology and community associations of moss-inhabiting diatoms is still rather limited. In the present study, our research aim was to survey the diversity together with the environmental factors structuring the epiphytic moss diatom communities on Ile Amsterdam (TAAF), a small volcanic island in the southern Indian Ocean.<b>Material and methods</b> – A morphology-based dataset and (physico)chemical measurements were used for the ecological and biogeographical an

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Liu, Hongbin, and Chih-Jung Wu. "Effect of the silica content of diatom prey on the production, decomposition and sinking of fecal pellets of the copepod <i>Calanus sinicus</i>." Biogeosciences 13, no. 16 (2016): 4767–75. http://dx.doi.org/10.5194/bg-13-4767-2016.

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Abstract. The effects of changing the amount of silica in the cell wall of diatom prey, on the production, decomposition rate and sinking velocity of fecal pellets of the calanoid copepod, Calanus sinicus, were examined. Using different light intensities to control the growth of the diatom Thalassiosira weissflogii also led to the accumulation of different amounts of biogenic silica. Copepods were then fed either low ( ∼ 1600 cells L−1) or high ( ∼ 8000 cells L−1) concentrations of this diatom. Copepods fed a high concentration of diatoms with high-silica content exhibited a lower grazing rate

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Rybak, Mateusz, Natalia Kochman-Kędziora, and Łukasz Peszek. "Description of four new terrestrial diatom species from Luticola and Microcostatus genera from South Africa." PhytoKeys 182 (September 14, 2021): 1–26. http://dx.doi.org/10.3897/phytokeys.181.65326.

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Abstract:

The knowledge about terrestrial diatom assemblages in southern Africa is rather limited, despite a long history of diatom research in this area. Terrestrial habitats are places of characteristic diatom floras, dominated by species resistant to desiccation which are able to thrive in conditions of limited water availability. The presented work expands the knowledge about these unique habitats. During the study on terrestrial moss-inhabiting diatoms from Western Cape Province (South Africa), four taxa with a unique set of valve features have been found and described herein as new species, based

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de Busserolles, Fanny, and N. Justin Marshall. "Seeing in the deep-sea: visual adaptations in lanternfishes." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1717 (2017): 20160070. http://dx.doi.org/10.1098/rstb.2016.0070.

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Ecological and behavioural constraints play a major role in shaping the visual system of different organisms. In the mesopelagic zone of the deep- sea, between 200 and 1000 m, very low intensities of downwelling light remain, creating one of the dimmest habitats in the world. This ambient light is, however, enhanced by a multitude of bioluminescent signals emitted by its inhabitants, but these are generally dim and intermittent. As a result, the visual system of mesopelagic organisms has been pushed to its sensitivity limits in order to function in this extreme environment. This review covers

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Kling, Joshua D., Kyla J. Kelly, Sophia Pei, Tatiana A. Rynearson, and David A. Hutchins. "Irradiance modulates thermal niche in a previously undescribed low‐light and cold‐adapted nano‐diatom." Limnology and Oceanography 66, no. 6 (2021): 2266–77. http://dx.doi.org/10.1002/lno.11752.

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Yin, Kedong, Paul J. Harrison, and Quay Dortch. "Lack of ammonium inhibition of nitrate uptake for a diatom grown under low light conditions." Journal of Experimental Marine Biology and Ecology 228, no. 1 (1998): 151–65. http://dx.doi.org/10.1016/s0022-0981(98)00025-2.

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Hay, Murray B., Audrey Dallimore, Richard E. Thomson, Stephen E. Calvert, and Reinhard Pienitz. "Siliceous microfossil record of late Holocene oceanography and climate along the west coast of Vancouver Island, British Columbia (Canada)." Quaternary Research 67, no. 1 (2007): 33–49. http://dx.doi.org/10.1016/j.yqres.2006.08.002.

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AbstractDiatoms, silicoflagellates, and biogenic silica (BSi) were analyzed from two piston cores recovered from Effingham Inlet, British Columbia. Relatively productive marine conditions from 4850 to 4000 cal yr BP were followed by a transition to the modern ocean–climate regime marked by a decreased siliceous microfossil production since 2800 cal yr BP. This change in the northeast Pacific climate was characterized by an apparent cooling associated with higher rainfall and lower light levels. The reduced abundance of most spring–summer bloom diatom taxa (Skeletonema–Thalassiosira–Chaetoceros

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