Academic literature on the topic 'Diatom adaptations for low light'

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

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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 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 &amp; 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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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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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·m–2·s–1. 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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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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Book chapters on the topic "Diatom adaptations for low light"

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Cotrozzi, Lorenzo, and Marco Landi. "Molecular and Physiological Adaptations of Tea Plant in Response to Low Light and UV Stress." In Stress Physiology of Tea in the Face of Climate Change. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2140-5_5.

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Lucas, Maëlle, Vincent Gouëset, and Florent Demoraes. "Cycling in Bogotá During a Pandemic. The Influence of Tactical Urbanism and Perceived Insecurity on Bicycle Usage." In The Urban Book Series. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-45308-3_9.

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AbstractThis chapter first analyses the impacts of the 2020 health crisis on bicycle policies, and second, the adaptations and reactions of the city’s bicycle users, in Bogotá. The capital of Colombia has been the first city in the world to create a network of pop-up bikeways to encourage citizens to avoid public transportation. These were inspired by tactical urbanism, which enabled its quick installation and adaptation. They were set up on main avenues, to serve low-income neighbourhoods, where remote working could not be implemented. This new policy has been used as a tool by Bogotá’s Mayor
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Kaiser, Michel J., Martin J. Attrill, Simon Jennings, et al. "Polar Regions." In Marine Ecology: Processes, Systems, and Impacts. Oxford University Press, 2020. http://dx.doi.org/10.1093/hesc/9780198717850.003.0014.

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This chapter takes a look at the polar oceans and seas. Organisms living in Arctic and Antarctic waters are adapted to low temperatures, long periods in the year of poor or entirely absent light, and an ecosystem dominated by the seasonal formation, consolidation, and subsequent melt of frozen seawater. These areas are now receiving much attention due to a rapidly changing landscape and seasonal dynamics attributable to global climate change. The effects of global climate change are likely to have profound influences on these regions, especially in the Arctic. However, an understanding of thei
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Conference papers on the topic "Diatom adaptations for low light"

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Warakapitiya, G. Y. D., S. B. A. Coorey, N. G. R. Perera, and R. Giridharan. "Behavioural adaptations and housing modification: a case study of a low-income high-rise housing estate in Sri Lanka." In World Construction Symposium - 2024. Department of Building Economics, 2024. http://dx.doi.org/10.31705/wcs.2024.22.

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Rapid urbanisation and population growth have intensified housing challenges in Sri Lanka. In response, the government initiated Urban Regeneration Projects (URPs) to create a slum-free Colombo. These projects involved constructing high-rise housing blocks for relocating low-income settlements and freeing up land for urban development. Unfortunately, several initiatives encountered failures due to inadequate services, limited employment access, substandard living conditions, poor maintenance, and unforeseen social consequences. This research delves into the adaptive behaviours of relocated low
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Bennett, Jarod, Mather Saladin, Daniel Sizoo, et al. "Design of an Efficient, Low-Cost, Stationary LiDAR System for Roadway Condition Monitoring." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69308.

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Abstract Light Imaging Detection and Ranging (LiDAR) systems generate point cloud imagery by using laser light to measure distance to a surface and then combine numerous points to create a three-dimensional (3-D) image. Since early adaptations, LiDAR is now common in aerial and subterranean geographical surveying and autonomous vehicle operations. The transportation industry uses LiDAR to monitor roadway quality, which can allow hazardous roadway corrosion to be spotted and repaired before endangering drivers. However, a leading issue with LiDAR availability is the respectively high price poin
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