Journal articles on the topic 'Water Lily Lake'
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1
Brugam, Richard B., Eric C. Grimm, and Nancy M. Eyster-Smith. "Holocene Environmental Changes in Lily Lake, Minnesota Inferred from Fossil Diatom and Pollen Assemblages." Quaternary Research 30, no. 1 (July 1988): 53–66. http://dx.doi.org/10.1016/0033-5894(88)90087-7.
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A postglacial core was taken from Lily Lake, a soft-water lake, located on carbonate-poor till in eastern Minnesota. Pollen analysis allowed the reconstruction of watershed vegetation change. Diatom assemblages from the core were compared with 255 surface sediment assemblages from Minnesota, Maine, Labrador, and the Canadian arctic. Late-glacial assemblages were similar to Canadian arctic lakes. During the mid-postglacial period of warmer and drier climate, fossil diatom assemblages at Lily Lake were similar to those in the surface sediment of modern eutrophic hardwater lakes in Central Minnesota. The shift to hardwater diatom assemblages coincided with a shift to prairie species in fossil pollen assemblages at about 8000 yr B.P. At about 3400 year B.P. the fossil diatom assemblage that characterized presettlement times was established.
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Lebedeva, O. A., E. A. Belyakov, and A. G. Lapirov. "Reproductive potential of yellow water-lily (Nuphar lutea) in the conditions of lake ecosystems." Biosystems Diversity 28, no. 1 (March 11, 2020): 60–67. http://dx.doi.org/10.15421/012010.
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Nuphar lutea (L.) Sm. (Nymphaeaceae Salisb.) belongs to the category of highly active cenose-forming plants in water bodies and water flows. The material for study of morphological peculiarities and seed productivity of the fruits of this species was collected mainly in the lake ecosystems of the Central Part of European Russia and Republic of Belarus. In the study we used biomorphological and ontogenetic approaches. Seed productivity was surveyed by direct count of number of seeds in the fruit. By abundance (in descending order), the significant reliable inter-lake differences in a number of morphological parameters of the fruit fall into the following sequence: number of rays of stigma of fruit (in six pairs of lakes) > length of fruit (in four pairs of lakes) > diameter of the stigma of fruit (in three pairs of lakes) > diameter of fruit (in two pairs of lakes) > length of the neck of the fruit (in one pair of lakes). Intra-regional differences in certain morphological parameters of fruits (by number of rays of stigmas) were most notably manifested only in the Belarus lakes which are similar by trophic status. All the differences in the fruits’ morphology could be due to differences in the habitat by the amount of nutrients in water and soil. The amount of seed productivity of the fruits from N. lutea varies broadly. Analysis of this parameter depending on the character of soils in which the plants grew indicated reliable results only in the case of muddy (296 ± 81) and sandy soils (179 ± 13). We determined that distribution of generative diasporas of N. lutea across large distances is related not only to presence of floating ability in the seeds, but also the “multi-step” process of their release: first – mericarps from fruits, and then seeds from mericarps. In the experimental conditions, most seeds directly sunk to the bed (70%) and the rest continued to float on the surface of the water during a month. Low germination of the seeds of the water-lily in the laboratory conditions (4–6%) with use of different means and terms of dry stratification was due to the fact that they have an organic morphophysiological intermediate type of rest. Having such a mechanism causes portioned and prolonged germination, allowing the species to survive in non-favourable conditions and accumulate generative diaspores in the soil. Despite the fact that the initial stages of ontogenesis in the laboratory and natural conditions have no significant differences, we found polyvariance in their tempo of development. First of all, this is related to different dates of transition of the plant from one age state to another. In the case of N. lutea, one should also note the morphological polyvariance of ontogenesis related to change in morphologic characteristics of plants depending on the water level. The obtained results give a more complete picture of the peculiarities of generative reproduction of N. lutea, necessary for understanding the ecosystem role of this plant and its impact on biological processes in water bodies.
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Stenberg, Johan A., and Johanna E. Stenberg. "Herbivory limits the yellow water lily in an overgrown lake and in flowing water." Hydrobiologia 691, no. 1 (February 25, 2012): 81–88. http://dx.doi.org/10.1007/s10750-012-1035-y.
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Ju, Yang, and Gil Bohrer. "Classification of Wetland Vegetation Based on NDVI Time Series from the HLS Dataset." Remote Sensing 14, no. 9 (April 27, 2022): 2107. http://dx.doi.org/10.3390/rs14092107.
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Natural wetlands are intrinsically heterogeneous and typically composed of a mosaic of ecosystem patches with different vegetation types. Hydrological and biogeochemical processes in wetlands vary strongly among these ecosystem patches. To date, most remote sensing classification approaches for wetland vegetation either rely on coarse images that cannot capture the spatial variability of wetland vegetation or rely on very-high-resolution multi-spectral images that are detailed but very sporadic in time (less than once per year). This study aimed to use NDVI time series, generated from NASA’s HLS dataset, to classify vegetation patches. We demonstrate our approach at a temperate, coastal lake, estuarine marsh. To classify vegetation patches, a standard time series library of the four land-cover patch types was built from referencing specific locations that were identified as “pure” pixels. These were identified using a single-time high-resolution image. We calculated the distance between the HLS-NDVI time series at each pixel and the “pure”-pixel standards for each land-cover type. The resulting true-positive classified rate was >73% for all patch types other than water lily. The classification accuracy was higher in pixels of a more uniform composition. A set of vegetation maps was created for the years 2016 to 2020 at our research site to identify the vegetation changes at the site as it is affected by rapid water elevation increases in Lake Erie. Our results reveal how changes in water elevation have changed the patch distribution in significant ways, leading to the local extinction of cattail by 2019 and a continuous increase in the area cover of water lily patches.
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Gee, Carole T., David Winship Taylor, and William C. Rember. "First water lily, a leaf of Nymphaea sp., from the Miocene Clarkia flora, northern Idaho, USA: Occurrence, taphonomic observations, floristic implications." Fossil Imprint 78, no. 1 (2022): 288–97. http://dx.doi.org/10.37520/fi.2022.011.
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Although the Miocene Clarkia locality in Idaho, USA, is a well-known fossil lagerstätte, this 16-million-year-old flora is especially renowned for its abundant leaves with excellent preservation. The exquisite condition of its dicot leaves has resulted in detailed research on systematics, morphology, venation, epidermal structure, cell ultrastructure, biochemistry, and even molecular biology. However, new discoveries continue to emerge, even after five decades of research. Here we describe the first water lily leaf from the Clarkia flora as Nymphaea sp. based on its form, petiole attachment, and venation. The eccentric peltate leaf is ovate with a cordate base, a deep basal sinus, entire margins, and actinodromous primary venation. Its small, unblemished condition and leathery texture suggests that it is a young floating leaf. While rare in the Clarkia Lake deposits, the occurrence of a single water lily leaf among tens of thousands of dicot and conifer leaves follows the taphonomic pattern of nearby Middle Miocene floras, two of which have yielded Nymphaea pollen. The recognition of Nymphaea at Clarkia supplements the taxonomic composition of the flora, confirms the presence of water lilies in region during the Middle Miocene, and completes our understanding of plant life in the Pacific Northwest 16 million years ago.
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Campbell, Peter G. C., André Tessier, Marc Bisson, and René Bougie. "Accumulation of Copper and Zinc in the Yellow Water Lily, Nuphar variegatum: Relationships to Metal Partitioning in the Adjacent Lake Sediments." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 1 (January 1, 1985): 23–32. http://dx.doi.org/10.1139/f85-003.
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Relationships between the partitioning of Cu and Zn in lake sediments and their availability to the yellow water lily, Nuphar variegatum, were examined downstream from a major Cu/Zn mining and smelting complex in Northwestern Quebec, Canada. At each of 13 sampling sites, five N. variegatum individuals were collected, separated into stem and rhizome portions, and analyzed for total Cu and Zn. At the same sites, sediment cores were collected at the base of each plant; the 0- to 2-cm stratum was extruded, wet sieved (850 μm), and subjected to a sequential leaching procedure to determine the partitioning of Cu and Zn among various operationally defined geochemical fractions. Statistical analysis suggested that a significant portion of the Cu burden in N. variegatum was probably derived from the sediments, whereas the Zn content of the plant originated largely in the water column. The concentrations of Cu in the fractions most readily extracted from the sediment were the best indicators of Cu bioavailability in the sediment; normalization of these concentrations with respect to the Fe content of the sediment improved the relationship with [Curhizome], suggesting that Fe may play a protective role in regulating Cu bioavailability.
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Willis, E. O. "Birds of a eucaliptos woodlot in interior São Paulo." Brazilian Journal of Biology 63, no. 1 (February 2003): 141–58. http://dx.doi.org/10.1590/s1519-69842003000100019.
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Some 255 birds were recorded between 1982-2001 in and near a 2314-ha "Horto" of old eucalyptus plantations with native understory and a lake, near Rio Claro, in central São Paulo, Brazil. This is close to the 263 recorded in and around a ten-times smaller nearby 230-ha woodlot of semideciduous forest. Different species were 44, for a total of 307 in both areas. One hundred and fifty nonvagrant forest and border species were recorded in 1982-86, a number close to the 152 in the small native woodlot. With dry years and logging of plots in 1985-93, 21 of the 150 species were lost, 42 species decreased in numbers, 49 were stable, 19 increased (15 being border species), and 5 entered (one of dry forest and 4 of borders), so 129 species remained in 1996-2001 compared to 133 in the native woodlot. Open-area birds were 33, versus 50 in better-checked grassy swales in sugar cane near the natural woodlot, for a total of 53. Several species, like some border ones, did not enter the open but isolated and mowed interior lake area, or took years to do so. Water and marsh birds were 46 versus 40 in smaller creeks and ponds near the natural woodlot (total, 55) but many were migrants or infrequent visitors using distant areas, and perhaps should be counted as 0.1-0.9 "local species" rather than "1" species. Use of this more accurate method would reduce waterbird totals by 14 "species" in the Horto and by 11 around the native woodlot. I also recommend longer censusing at the edges in large woodlots or many edge species will be recorded only in small fragments of habitat. Several species increased and others decreased with occasional cat-tail and water-lily cleanups at the lake. A forested corridor between the Horto and natural woodlot is recommended, with old eucalyptus left to provide flowers for hummingbirds.
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Husband, Claire R., Nigel J. Cassidy, and Ian G. Stimpson. "The geophysical investigation of lake water seepage in the regulated environment of the Bosherston Lily Ponds, South Wales, UK. Part 1: natural, fracture‐related pathways." Near Surface Geophysics 7, no. 5-6 (July 2009): 499–515. http://dx.doi.org/10.3997/1873-0604.2009042.
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Husband, Claire R., Nigel J. Cassidy, and Ian G. Stimpson. "The geophysical investigation of lake water seepage in the regulated environment of the Bosherston Lily Ponds, South Wales, UK. Part 2: historical, dam‐related pathways." Near Surface Geophysics 7, no. 5-6 (July 2009): 517–28. http://dx.doi.org/10.3997/1873-0604.2009044.
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Shinkareva, G. L., M. Yu Lychagin, M. K. Tarasov, J. Pietroń, M. A. Chichaeva, and S. R. Chalov. "Biogeochemical specialization of macrophytes and their role as a biofilter in the Selenga delta." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 12, no. 3 (October 3, 2019): 240–63. http://dx.doi.org/10.24057/2071-9388-2019-103.
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This study aims to evaluate the biofiltration ability of higher aquatic vegetation of the Selenga delta as a barrier for heavy metals and metalloids (HMM) flows into the Lake Baikal. Main aquatic vegetation species have been collected from deltaic channels and inner lakes: Nuphar pumila, Potamogeton perfoliatus, P. pectinatus, P. natans, P. friesii, Butomus umbellatus, Myriophyllum spicatum, Ceratophyllum demersum, Phragmites australis. Analysis of the obtained data showed that regardless of the place of growth hydatophytes spiked water-milfoil (M. spicatum) and the fennel-leaved pondweed (P. pectinatus) most actively accumulate metals. Opposite tendencies were found for helophytes reed (Ph. australis) and flowering rush (B. umbellatus), which concentrate the least amount of elements. This supports previous findings that the ability to concentrate HMM increases in the series of surface – floating – submerged plants. Regarding river water, the studied macrophyte species are enriched with Mn and Co, regarding suspended matter – Mo, Mn and B, regarding bottom sediments – Mn, Mo and As. We identified two associations of chemical elements: S-association with the predominant suspended form of migration (Be, V, Co, Ni, W, Pb, Bi, Mn, Fe and Al) and D-association with the predominant dissolved form of migration (B, U, Mo, Cr, Cu, Zn, As, Cd, Sn and Sb). Due to these associations three groups of macrophytes were distinguished – flowering rush and reed with a low HMM content; small yellow pond-lily and common floating pondweed with a moderate accumulation of S-association and weak accumulation of D-association elements; and clasping-leaved pondweed, fennel-leaved pondweed, and pondweed Friesii accumulating elements of both S and D groups. The results suggest that macrophytes retain more than 60% of the total Mn flux that came into the delta, more than 10% – W, As, and from 3 to 10% B, Fe, Co, Mo, Cd, V, Ni, Bi, Be, Cu, Zn, Cr, U, Al. The largest contribution is made by the group of hydatophytes (spiked water-milfoil and pondweed), which account for 74 to 96% of the total mass of substances accumulated by aquatic plants.
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Robson, Diana Bizecki, John H. Wiersema, C. Barre Hellquist, and Thomas Borsch. "Distribution and Ecology of a New Species of Water-lily, Nymphaea loriana (Nymphaeaceae), in Western Canada." Canadian Field-Naturalist 130, no. 1 (January 1, 2016): 25. http://dx.doi.org/10.22621/cfn.v130i1.1787.
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Nymphaea loriana Wiersema, Hellq. & Borsch (Lori’s Water-lily) is a newly described, Canadian endemic species that has been found in central Manitoba and east-central Saskatchewan. To assess the status of a species, data regarding its distribution, population size, habitat, and search effort are needed. The purpose of this paper is to document these factors for this species. The extent of occurrence of N. loriana is approximately 15 100 km2 but the known area of occupancy is a mere 20 km2. The estimated population size of N. loriana is about 750 individual plants, although more may exist on poorly explored rivers and lakes within the extent of occurrence and possibly in northeastern Ontario. Nymphaea loriana occurs in fresh, stagnant, or slowly moving water in boreal lakes and rivers and is typically associated with N. leibergii (Dwarf Water-lily), Schoenoplectus tabernaemontani (Soft-stemmed Bulrush), Potamogeton natans (Floating-leaved Pondweed) and Nuphar variegata (Variegated Pondlily). Potential threats to the persistence of this species include low water quality resulting from mining, forestry, and agriculture, and changes to water flow because of dam construction and climate change. Monitoring known populations and searching for additional ones may be needed to assess the status of this species.
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Wisenden, Brian, Shireen Alemadi, Thomas P. Dye, Katie Geray, Jodi Hendrickson, Courtney Rud, Michael Jensen, Goodwin Sonstegard, and Michelle Malott. "Effects of nest substrate on egg deposition and incubation conditions in a natural population of fathead minnows (Pimephales promelas)." Canadian Journal of Zoology 87, no. 5 (May 2009): 379–87. http://dx.doi.org/10.1139/z09-022.
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Fathead minnows ( Pimephales promelas Rafinesque, 1820) occur commonly in small lakes across the prairie region of North America. Males establish nests, court females, and tend the eggs. In our study population in Minnesota, males choose between two distinct nest substrates that differ in exposure to abiotic conditions affecting egg development: the underside of pond-lily (genus Nuphar Sm.) pads or the underside of submerged sticks. We found that lily pad nests contained more eggs, more clutches of different ages, and eggs distributed over a larger area than nests under submerged sticks. The difference in egg incubation temperatures between lily pad nests and stick nests varied diurnally with air–water temperature gradients. Proximity to the surface allowed lily pad nests to be significantly warmer during the day but only slightly cooler at night than nests under submerged sticks, resulting in about 10 h shorter time to hatch. The availability of lily pads for nests may greatly alter selection on sexual behaviour by males in competing for limiting nest sites of high quality, and female opportunity to exercise choice of mate. Moreover, availability of lily pads changes the role of abiotic conditions. In warm weather, males that nest under lily pads may achieve greater reproductive success than males that nest under sticks.
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Clark, Erin M. R., John M. Dole, Alicain S. Carlson, Erin P. Moody, Ingram F. McCall, Frankie L. Fanelli, and William C. Fonteno. "Vase Life of New Cut Flower Cultivars." HortTechnology 20, no. 6 (December 2010): 1016–25. http://dx.doi.org/10.21273/hortsci.20.6.1016.
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Each year a wide variety of new cultivars and species are evaluated in the National Cut Flower Trial Programs administered by North Carolina State University and the Association of Specialty Cut Flower Growers. Stems of promising and productive cultivars from the National Trial Program were pretreated with either a commercial hydrating solution or deionized (DI) water and placed in either a commercial holding solution or DI water. Over 8 years, the vase life of 121 cultivars representing 47 cut flower genera was determined. Although there was cultivar variation within each genus, patterns of postharvest responses have emerged. The largest category, with 53 cultivars, was one in which a holding preservative increased vase life of the following genera and species: acidanthera (Gladiolus murielae), basil (Ocimum basilicum), bee balm (Monarda hybrid), black-eyed susan (Rudbeckia hybrids), campanula (Campanula species), celosia (Celosia argentea), common ninebark (Physocarpus opulifolius), coneflower (Echinacea purpurea), coral bells (Heuchera hybrids), feverfew (Tanacetum parthenium), foxglove (Digitalis purpurea), ladybells (Adenophora hybrid), lisianthus (Eustoma grandiflorum), lobelia (Lobelia hybrids), obedient plant (Physostegia virginiana), ornamental pepper (Capsicum annuum), pincushion flower (Scabiosa atropurpurea), pinkflower (Indigofera amblyantha), seven-sons flower (Heptacodium miconioides), shasta daisy (Leucanthemum superbum), sunflower (Helianthus annuus), snapdragon (Antirrhinum majus), sweet william (Dianthus hybrids), trachelium (Trachelium caeruleum), and zinnia (Zinnia elegans). Hydrating preservatives increased the vase life of four basils, coral bells, and sunflower cultivars. The combined use of hydrator and holding preservatives increased the vase life of three black-eyed susan, seven-sons flower, and sunflower cultivars. Holding preservatives reduced the vase life of 14 cultivars of the following genera and species: ageratum (Ageratum houstonianum), false queen anne's lace (Ammi species), knotweed (Persicaria hybrid), lisianthus, pineapple lily (Eucomis comosa), sneezeweed (Helenium autumnale), yarrow (Achillea millifolium), and zinnia. Hydrating preservatives reduced the vase life of 18 cultivars of the following genera and species: feverfew, lisianthus, ornamental pepper, pineapple lily, seven-sons flower, shasta daisy, sneezeweed, sweet william, sunflower, trachelium, yarrow, and zinnia. The combined use of hydrating and holding preservatives reduced the vase life of 12 cultivars in the following genera and species: false queen anne's lace, feverfew, pincushion flower, sneezeweed, sunflower, trachelium, yarrow, and zinnia. Data for the remaining 50 cultivars were not significant among the treatments; these genera and species included beautyberry (Callicarpa americana), black-eyed susan, blue mist (Caryopteris clandonensis), calendula (Calendula officinalis), campanula, cleome (Cleome hasserliana), common ninebark, dahlia (Dahlia hybrids), delphinium (Delphinium hybrids), flowering peach (Prunus persica forma versicolor), heliopsis (Heliopsis helianthoides), hemp agrimony (Eupatorium cannabinum), himalayan honeysuckle (Leycesteria formosa), hydrangea (Hydrangea paniculata), larkspur (Consolida hybrids), lily of the nile (Agapanthus hybrid), lisianthus, lobelia, ornamental pepper, pineapple lily, scented geranium (Pelargonium hybrid), sunflower, sweet william, and zinnia.
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Ferguson, Dennis E. "Allelopathic potential of western coneflower (Rudbeckia occidentalis)." Canadian Journal of Botany 69, no. 12 (December 1, 1991): 2806–8. http://dx.doi.org/10.1139/b91-351.
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Water extracts and volatiles from western coneflower (Rudbeckia occidentalis Nutt.) were tested for allelopathic potential under controlled laboratory conditions. Test species were lettuce (Lactuca sativa, Lilly Miller Great Lakes), lodgepole pine (Pinus contorta Dougl. ex Loud.), and Engelmann spruce (Picea engelmannii Parry ex Engelm.) using four treatments (leaves–stems, solid caudex, rotting caudex, and control). Water extracts reduced radicle lengths of seeds but had little effect on germination. Volatiles reduced or delayed germination but had little effect on radicle lengths of germinants. Key words: phytotoxin, Pinus contorta, Picea engelmannii.
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SUGIER, PIOTR, and BOGDAN LORENS. "Resources of Nuphar lutea (L.) Sibth. & Sm. in mid-eastern Poland as a potential source of herbal raw material." Agronomy Science 75, no. 3 (October 2, 2020): 103–16. http://dx.doi.org/10.24326/as.2020.3.8.
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The aim of this study was to characterize the phytocoenoses with a share of Nuphar lutea (L.) Sibth. & Sm. and to evaluate the area of patches of Nupharo-Nymphaeetum albae Tomaszewicz 1977 as well as resources of the yellow water lily that can be used as a source of valuable medicinal raw material. The field investigations were carried out in the summer seasons of 2009–2018, and fifty-eight lakes were included in this study. Nuphar lutea is a very interesting plant species due to considerable concentration of secondary metabolites and their biological activity. Therefore, under conditions of eastern Poland, it can be a valuable raw material for pharmaceutical purposes. The largest Nupharo-Nymphaeetum albae phytocoenoses with N. lutea as the main floristic component are localized especially in retention reservoirs connected with the Wieprz-Krzna Canal and other lakes of a natural character. They are often very shallow basins. Therefore, removal of a biomass, especially in the case of small lakes that overgrow at a very rapid rate, can significantly slow down their shallowing and they will remain and function in the landscape over a longer time. Harvesting the N. lutea leaves can decelerate the process of shallowing of water bodies, especially in the case of retention reservoirs, and may contribute to their better functioning. Collected raw material can be a source of valuable secondary metabolites suitable for the pharmaceutical industry.
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DeWolf, Ella Ide, William John Calder, Joshua Grant Harrison, Gregory Donald Randolph, Benjamin Edward Noren, and Cynthia Weinig. "Aquatic Macrophytes Are Associated With Variation in Biogeochemistry and Bacterial Assemblages of Mountain Lakes." Frontiers in Microbiology 12 (January 27, 2022). http://dx.doi.org/10.3389/fmicb.2021.777084.
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In aquatic systems, microbes likely play critical roles in biogeochemical cycling and ecosystem processes, but much remains to be learned regarding microbial biogeography and ecology. The microbial ecology of mountain lakes is particularly understudied. We hypothesized that microbial distribution among lakes is shaped, in part, by aquatic plant communities and the biogeochemistry of the lake. Specifically, we investigated the associations of yellow water lilies (Nuphar polysepala) with the biogeochemistry and microbial assemblages within mountain lakes at two scales: within a single lake and among lakes within a mountain range. We first compared the biogeochemistry of lakes without water lilies to those colonized to varying degrees by water lilies. Lakes with >10% of the surface occupied by water lilies had lower pH and higher dissolved organic carbon than those without water lilies and had a different microbial composition. Notably, cyanobacteria were negatively associated with water lily presence, a result consistent with the past observation that macrophytes outcompete phytoplankton and can suppress cyanobacterial and algal blooms. To examine the influence of macrophytes on microbial distribution within a lake, we characterized microbial assemblages present on abaxial and adaxial water lily leaf surfaces and in the water column. Microbial diversity and composition varied among all three habitats, with the highest diversity of microbes observed on the adaxial side of leaves. Overall, this study suggests that water lilies influence the biogeochemistry and microbiology of mountains lakes.
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Mikhailova, Kristina B., and Sergey G. Mikhalap. "The dynamics of overgrowing of spawning areas of Lake Pskov, using the example of Anokhovo Bay." Ecosystem Transformation 3, no. 4 (2020). http://dx.doi.org/10.23859/estr-200404.
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The dynamics of overgrowing of spawning grounds in the southern area of Peipsi-Pihkva Lake complex is considered, based on 28 years of observations from Anokhovo Bay. The history of the study of the water area is analyzed in detail, the species and syntaxonomic composition of plant associations in the littoral areas of the bay is described, and the dominant species are established. Over the entire observation period, the total number of macrophyte species increased by almost 2.5 times, and the number of plant associations increased approximately twofold. The area of the bay overgrown with macrophytes increased by 9.5%, with a simultaneous increase in the overgrowth density. The dominant species are common reed Phragmites australis, lakeshore bulrush Schoenoplectus lacustris, and yellow water-lily Nuphar lutea.
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Ejankowski, Wojciech, and Bartłomiej Małysz. "Morphological variability of the water lily (Nymphaea) in the Polesie Zachodnie region, Eastern Poland." Biologia 66, no. 4 (January 1, 2011). http://dx.doi.org/10.2478/s11756-011-0055-9.
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AbstractMorphological analysis of the water lily (Nymphaea) was carried out to verify distribution of two closely related species Nymphaea alba and N. candida in the large swampy area in Eastern Poland, Polesie Zachodnie. A total of 25 lakes were investigated across the region. Data were collected from 20 lakes of different origin. Based on morphological characters of flowers and leaves the specimens varied continuously from “pure” N. candida to N. alba with high number of plants with mixed morphology, commonly known as N. × borealis. The intermediate morphotypes were common in all over the study area, whereas plants with exact morphology of N. candida were found mostly in humic lakes, in the eastern part of the region. The results provide evidences that N. candida occurs beyond formerly recognized southern border of its range in the country.
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Unawekla, Julyan V., Emma Sy Moeis, and Yuanita A. Langi. "Hubungan antara Status Gizi dan Sistem Imun Seluler pada Subyek Penyakit Ginjal Kronik Stadium V Hemodialisis di Instalasi Tindakan Hemodialisis RSUP Prof. Dr. R. D. Kandou Manado." e-CliniC 6, no. 1 (January 9, 2018). http://dx.doi.org/10.35790/ecl.6.1.2018.18682.
Full textAbstract:
Abstract: Chronic kidney disease (CKD) is a pathophysiological process with a diverse etiology that causes progressive decrease of renal function and is generally ended with renal failure. Patients with CKD are given low-protein and low-water diets that can affect their nutritional status and immune system. This study was aimed to determine the relationship between nutritional status and cellular immune system in patients with stage V CKD that had hemodialysis perfomed on them at the Installation of Hemodialysis of Prof. Dr. R. D. Kandou Hospital Manado. This was a descriptive analytical study with a cross sectional design. Variables were age, gender, lymphocyte count, body mass index (BMI), and upper arm circumference. There were 30 samples in this study; males (56.7%) were more dominant. The age range was 36-76 years; lymphocyte count range was 1000-4131; IMT range was 16-28.1; and upper arm circumference range was 17-28.50. The Spearman parametric test of the relationship between nutritional status and cellular immune system based on BMI and lymphocyte count obtained a P-value of 0.111 meanwhile the relationship between nutritional status based on upper arm circumference and lymphocytes obtained a P-value of 0.309. Conclusion: There was no relationship between nutritional status (BMI and arm circumference) and cellular immune system (lymphocyte count) in stage V CKD patients that had hemodialysis perfomed on them. Keywords: CKD V-HD, nutritional status, cellular immune systemAbstrak: Penyakit ginjal kronik (PGK) adalah suatu proses patofisiologis dengan etiologi beragam yang mengakibatkan penurunan fungsi ginjal secara progesif dan umumnya berahir dengan gagal ginjal. Pasien PGK diberikan terapi rendah protein dan air sehingga dapat berdampak pada status gizi dan sistem imun pasien. Penelitian ini bertujuan untuk mengetahui hubungan status gizi dengan sistem imun seluler pada subyek PGK stadium V hemodialisis di Instalasi Tindakan Hemodialisis RSUP Prof. Dr. R. D. Kandou Manado. Jenis penelitian ialah deskriptif analitik dengan desain potong lintang. Variabel penelitian ialah usia, jenis kelamin, hasil hitung limfosit, hitung IMT, dan ukuran lingkar lengan atas (LILA). Hasil penelitian mendapatkan 30 sampel dengan jumlah terbanyak ialah laki-laki 17 orang (56,7%), cengan rentang usia 36-76 tahun. Kisaran nilai untuk limfosit ialah 1000-4131; IMT 16-28,1; dan LILA 17-28,50. Uji parametrik Spearman terhadap hubungan antara status gizi berdasarkan IMT dan limfosit mendapatkan P=0,111 sedangkan antara status gizi berdasarkan LILA dan limfosit mendapatkan P=0,309. Simpulan: Tidak terdapat hubungan antara status gizi (IMT dan LILA) dengan limfosit (sistem imun) pada pasien PGK V yang menjalani hemodialisis.Kata kunci: PGK V-HD, status gizi, sistem imun seluler