Relevant bibliographies by topics / Lotic ecosystems

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Lotic ecosystems'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2023

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Journal articles on the topic "Lotic ecosystems"

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Brandão, Heleno, Fábio Hideki Yamada, Gislayne de Melo Toledo, Edmir Daniel Carvalho, and Reinaldo José da Silva. "Monogeneans (Dactylogyridae) parasitizing gills ofSalminus hilarii from a Neotropical reservoir, Brazil." Revista Brasileira de Parasitologia Veterinária 22, no. 4 (December 2013): 579–87. http://dx.doi.org/10.1590/s1984-29612013000400020.

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With the aim of creating an inventory of the metazoan gill parasites of Salminus hilarii in the Taquari River, state of São Paulo, Brazil, five species of monogeneans (Anacanthorus contortus,A. bicuspidatus, Annulotrematoides parisellei, Jainus iocensis andTereancistrum arcuatus) are reported the first time for this host. A total of 28 fish were sampled quarterly between April 2011 and January 2012, with 10 hosts in a lentic ecosystem and 18 in a lotic ecosystem. Quantitative ecological descriptors (prevalence, intensity of infestation and abundance) were calculated for the purpose to comparing the two ecosystems sampled (lentic and lotic ecosystems). However, no quantitative difference between the lentic and lotic ecosystems was observed. The present study has made available a checklist for species of the genus Anacanthorus and their hosts and geographical distribution in the Neotropical region up to the present time.
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Avila-Perez, Humberto, Enrique J. Flores-Munguía, José L. Rosas-Acevedo, Iván Gallardo-Bernal, and Tania A. Ramirez-delReal. "Comparative Analysis of Water Quality Applying Statistic and Machine Learning Method: A Case Study in Coyuca Lagoon and Tecpan River, Mexico." Water 15, no. 4 (February 6, 2023): 640. http://dx.doi.org/10.3390/w15040640.

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The water quality monitoring of lotic and lentic ecosystems allows for informing the possible use in human activities and the consumption of the vital liquid. This work measures the biochemical parameters in Coyuca Lagoon and Tecpan River, localized in Guerrero, Mexico. A comparative statistical analysis of six physicochemical factors in lentic and lotic ecosystems was carried out, finding individual pH values slightly higher for the lagoon ecosystem and lower for the river. For electrical conductivity, we find river sites with parameters lower than 500 µS/cm ideal for human use and consumption. On the contrary, in sites of the lagoon system, the conductivity was higher. As for the total hardness of the river, the values are within the Mexican standard; however, for the lagoon ecosystem, the water has a higher amount of calcium and magnesium salts and is not recommended for human consumption. For chlorides, the lagoon system exceeds the limits of regulations for human consumption; otherwise, it happens with the lotic system. The values of total alkalinity and total dissolved solids are higher for the lentic system than for the lotic one. Finally, the machine learning method shows the importance of measuring other parameters to determine the water quality, especially the salinity and calcium hardness.
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Branco, Luis Henrique Z., Orlando Necchi Jr., and Ciro Cesar Z. Branco. "Cyanophyceae from lotic ecosystems of São Paulo State, southeastern Brazil." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 94 (September 16, 1999): 63–87. http://dx.doi.org/10.1127/algol_stud/94/1999/63.

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Al-Saeedi, Hind Mahdi Salih, and Ibrahim M. A. Al Salman. "Biodiversity of Phytoplankton in Two Aquatic Ecosystems (LOTIC and LENTIC) During the Autumn Season." Pakistan Journal of Medical and Health Sciences 16, no. 6 (June 29, 2022): 379–85. http://dx.doi.org/10.53350/pjmhs22166379.

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Phytoplankton have been studied in quantity and quality in two aquatic ecosystems represented by two sites in the lake of Baghdad Island tourist as a lotic ecosystem and two sites of the Tigris River, one north of the lake and the other south as an lentic ecosystem, and the study was conducted in the autumn of 2021, where 69 species were diagnosed in the environment of the two ecosystems studied, distributed to 14 species of Chlorophyta, 21 species of Cyanobacteria, 29 species of diatom (1 belongs to Centrales order and 28 to Pennales order), 3 species of Euglenophyta and two species of the Chrysophyta division. The dominance of algae belonging to the genus of; Pinnularia, Synedra, Ankistrodesmus, Chroococcus, Oscillatoria, Synechacoccns, Navicula and Nitzschia during the autumn period and at all Sites. Some species showed high density such as: Ankistrodesmus falcatus, Chroococcus disperses, Chroococcus minor, Oscillatoria limnetica, Synechacoccns aeruginosus, Navicula sp. and Nitzschia longissima. The quantitative results showed that the mean density of the phytoplankton in the lotic aquatic ecosystem exceeded that the lentic aquatic ecosystem when recorded (378.68 × 103 cells/L and 334.21×103 cells/L) respectively. Air temperature values were recorded (20-36) °C and while water temperature ranged between (16-25.5) °C, NTU (5.8-19.5) 4), TDS (421-620) mg/L, as well as EC (1027-1380) μS/cm, whereas pH value was (7.4-8.4), (DO) (6.4-8.6), and BOD (204-305). Also, by measuring the values of the essential macronutrients for algae growth, it was found that the values of concentrations NO3 (0.468-0.986), PO4- (0.038-0.061) SO4- (175.6-293.37), and SO3 (3.9-6.9) mg/L respectively. Keywords: Phytoplankton, Biodiversity, Lotic Ecosystem, Lentic Ecosystem, Physiochemical factors.
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Ward, J. V. "The Four-Dimensional Nature of Lotic Ecosystems." Journal of the North American Benthological Society 8, no. 1 (March 1989): 2–8. http://dx.doi.org/10.2307/1467397.

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Hamilton, Steven J., and Vince P. Palace. "Assessment of Selenium Effects in Lotic Ecosystems." Ecotoxicology and Environmental Safety 50, no. 3 (November 2001): 161–66. http://dx.doi.org/10.1006/eesa.2001.2111.

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Bhattacharyya, Sohini, Ajay Kumar Harit, Manoj Singh, Urvashi Sharma, and Chaitramayee Pradhan. "Occurrence of Antibiotic Resistance in Lotic Ecosystems." SCIENTIFIC TEMPER 13, no. 2 (December 31, 2022): 421–24. http://dx.doi.org/10.58414/scientifictemper.13.2.2022.421-424.

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Necchi, Orlando Jr, and João C. L. Moreira. "Longitudinal distribution of macroalgae in two tropical lotic ecosystems from southeastern Brazil." Archiv für Hydrobiologie 135, no. 1 (October 23, 1995): 113–28. http://dx.doi.org/10.1127/archiv-hydrobiol/135/1995/113.

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Rojano, Fernando, David Huber, Ifeoma Ugwuanyi, Vadesse Noundou, Andrielle Kemajou-Tchamba, and Jesus Chavarria-Palma. "Net Ecosystem Production of a River Relying on Hydrology, Hydrodynamics and Water Quality Monitoring Stations." Water 12, no. 3 (March 12, 2020): 783. http://dx.doi.org/10.3390/w12030783.

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Flow and water quality of rivers are highly dynamic. Water quantity and quality are subjected to simultaneous physical, chemical and biological processes making it difficult to accurately assess lotic ecosystems. Our study investigated net ecosystem production (NEP) relying on high-frequency data of hydrology, hydrodynamics and water quality. The Kanawha River, West Virginia was investigated along 52.8 km to estimate NEP. Water quality data were collected along the river using three distributed multiprobe sondes that measured water temperature, dissolved oxygen, dissolved oxygen saturation, specific conductance, turbidity and ORP hourly for 71 days. Flows along the river were predicted by means of the hydrologic and hydrodynamic models in Hydrologic Simulation Program in Fortran (HSPF). It was found that urban local inflows were correlated with NEP. However, under hypoxic conditions, local inflows were correlated with specific conductance. Thus, our approach represents an effort for the systematic integration of data derived from models and field measurements with the aim of providing an improved assessment of lotic ecosystems.
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Winemiller, Kirk O., Alexander S. Flecker, and David J. Hoeinghaus. "Patch dynamics and environmental heterogeneity in lotic ecosystems." Journal of the North American Benthological Society 29, no. 1 (March 2010): 84–99. http://dx.doi.org/10.1899/08-048.1.

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Dissertations / Theses on the topic "Lotic ecosystems"

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Hayes, Richard Birchall. "Consequences for lotic ecosystems of invasion by signal crayfish." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/2484.

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Non-native invasive species are major drivers of biodiversity loss and ecosystemlevel modification. The signal crayfish (Pacifastacus leniusculus) is a highly successful invasive species and demonstrates traits often seen in keystone species, including top-down predatory effects, a high degree of omnivory, and an ability to physically modify its habitat. From field surveys, and in situ and artificial channel experiments, I show that signal crayfish have direct and indirect impacts on the benthos, as well as ecosystem process rates, in lowland, chalk stream ecosystems. Furthermore, I show that these effects are often dependent on crayfish life stage. I demonstrate that two native fish species (chub, Leuciscus cephalus and bullhead, Cottus gobio) may be affected positively, as well as negatively, by signal crayfish invasion. In addition, population genetics reveals overall high levels of genetic diversity in populations of signal crayfish in the UK.
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Lawson, Laurie Linwood. "Epilithic diatoms as indicators of stream condition in arid lotic ecosystems of the american southwest." Diss., The University of Arizona, 1999. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1999_093_sip1_w.pdf&type=application/pdf.

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Jacobson, Peter James. "An ephemeral perspective of fluvial ecosystems: Viewing ephemeral rivers in the context of current lotic ecology." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30582.

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Hydrologic and material dynamics of ephemeral rivers were investigated in the Namib Desert to assess how hydrologic regimes shape the physical habitat template of these river ecosystems. An analysis of long-term hydrologic records revealed that the variation in mean annual runoff and peak discharge were nearly four times higher than the global average, rendering the rivers among the most variable fluvial systems yet described. Further, a pronounced downstream hydrologic decay characterized all of the rivers. The high spatio-temporal variability in flow was reflected in patterns of material transport. Retention of woody debris increased downstream, in contrast to patterns typically reported from more mesic systems, largely attributable to hydrologic decay. Woody debris piles were the principal retentive obstacles and played an important role in channel dynamics. They were also key microhabitats for various organisms, forming "hotspots" of heterotrophic activity analogous to patterns reported from perennial streams. Large amounts of fine particulate and dissolved organic matter (FPOM and DOM) deposited in the lower reaches of the rivers serve to fuel this heterotrophic biota. As a result of the hydrologic decay, sediment concentration (both organic and inorganic) increased downstream and the lower reaches of these rivers acted as sinks for material exported from their catchments. FPOM and DOM concentrations were among the highest reported for any aquatic system, and, contrary to patterns reported from more mesic systems, FPOM dominated the total organic load transported in these rivers. Inorganic solute concentration also increased downstream, resulting in a downstream increase in soluble salt content in floodplain soils. Soils within the river's lower reaches served as effective long-term integrators of hydrologic variability. The mean extent of floods entering the lower river was defined by an alluviation zone, evident from the convexity exhibited in the lower section of the rivers' longitudinal profiles. A downstream increase in the proportion of silt within floodplain soils is associated with increased sediment deposition. Silt deposition had a positive influence on moisture availability, plant rooting, and habitat suitability for various organisms, including fungi and invertebrates. In addition, a strong positive correlation was observed between silt, organic matter, and macronutrients. Thus, the hydrologic control of transport and deposition patterns has important implications for the structure and function of ephemeral river ecosystems. Finally, an examination of the influence of elephants upon riverine vegetation highlighted the importance of these systems as isolated resource patches interspersed in an arid and hostile landscape. Further, it illustrated that flooding was a key ecological process and that hydrologic alterations would affect the fluvial ecosystem as well as the regional landscape they drain.
Ph. D.
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Wishart, Marcus J. "A comparative phylogeographic approach toward defining functional units for the conservation of biodiversity in lotic ecosystems." Connect to this title online, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20031125.103610/.

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Vaz, Pedro Jorge Gonçalves. "Long-term effects of portuguese forest fires on morphology and aquatic habitat structure of lotic ecosystems." Doctoral thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/10811.

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This thesis investigates long-term effects of forest fires on morphology and functioning of Portuguese streams via burned wood. Wildfires influenced the landscape dynamics across three regions examined, towards increases in shrublands encroaching into previously forested areas. Large wood amounts within 27 streams were low and are expected to decline in the future owing to wildfire. Likewise, wildfire was promoting wood lacking structural complexity, thus likely reducing habitat heterogeneity that improves conditions for aquatic organisms. The effect of fire providing wood with greater diameter will increase its probability for stream functions such as pool formation. However, this functionality may not persist because most of this wood was decayed and less stable in the channel. It is critical for aquatic communities if fire-derived wood falls directly into the river or if it is previously conditioned for some time on the forest floor; Efeitos a longo prazo dos fogos florestais na morfologia e estrutura do habitat em ecossistemas lóticos de Portugal ### Esta tese avalia os efeitos a longo prazo dos fogos florestais na morfologia e funcionamento de rios portugueses através da madeira ardida. O fogo influenciou a dinâmica da paisagem em três regiões estudadas, favorecendo a invasão por matos de áreas previamente florestadas. A quantidade de pedaços de madeira em 27 rios foi baixa e prevê-se a sua diminuição futura por influência do fogo. O fogo promoveu também a presença de madeira com menor complexidade estrutural, reduzindo provavelmente a heterogeneidade de habitat que melhora as condições para os organismos aquáticos. A madeira queimada tinha maior diâmetro, aumentando a probabilidade de função no rio, como a criação de fundões. Esta funcionalidade pode não persistir porque esta madeira estava degradada e menos estável no canal. É determinante para as comunidades aquáticas se a madeira dos fogos cai directamente no rio ou se é previamente condicionada durante algum tempo no solo da floresta.
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Machado, Ana Luísa Felgueiras de Brito. "The effects of wildfire on lotic macroinvertebrate communities in Portugal." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/14539.

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Doutoramento em Biologia
The effects of wildfires in Mediterranean lotic communities are still poorly documented. Despite some progress in recent years, the published data refer mainly to studies conducted in North America, with little information on European rivers. Given the importance of regional geographic context, both on the effects of fire and on the resilience of the communities, the gap in the biogeographical knowledge represent a limitation to the implementation of appropriate management measures. This thesis consists in a systematic study of the effects of fire on the macroinvertebrate communities of streams of North and Central Portugal. A chronosequence survey was conducted in order to analyze long-term effects of wildfires (1-18 years) and provide chronological information on the ecological recovery of macroinvertebrate communities. The results indicated that the macroinvertebrate communities recover in abundance and taxa richness and in terms of community structure about two years after the fire impact. A short-term survey was also carried out, where the initial response of macroinvertebrates to fire disturbance was documented, in streams recently affected by wildfires. The parameters analyzed were compared with reference sites without fire impact for the last 20 years. In all sampling periods, lower abundance and lower species richness were recorded in impacted streams, and differences in community structure were found between burnt sites and reference sites. In our study, both on long -term and short-term surveys, the environmental features that conditioned the response of biological communities were evaluated. River size, the extent of the burnt area, conductivity, along with channel characteristics and riparian vegetation, were considered determinant in the response of macroinvertebrates communities to fire impact, and can influence the susceptibility of stream ecosystems. We also analyzed the data of the short-term survey on a trait approach. Differences on functional diversity and on frequency of several trait modalities were analyzed. Specific differences in the food group and reproductive strategies between burned and not burned sites were recorded. Despite the unequivocal negative impact of wildfire on macroinvertebrate communities of Portuguese streams, the recovery seems to be rapid, demonstrating their resilience to this type of disturbance.
Os efeitos dos fogos nas comunidades lóticas mediterrânicas estão ainda mal documentados. Apesar do progresso verificado nos últimos anos, os dados publicados referem-se principalmente a estudos efetuados na América do Norte, sendo escassa a informação relativa aos rios Europeus. Dada a importância do contexto geográfico regional, quer nos efeitos do fogo no meio ambiente quer na resiliência das comunidades, a lacuna no conhecimento biogeográfico representa uma limitação à implementação de medidas de gestão adequadas. A presente tese consiste um estudo sistemático dos efeitos do fogo nas comunidades de macroinvertebrados dos ribeiros do Norte e Centro de Portugal. Foi analisada uma cronosequência para averiguar o efeito do fogo numa escala temporal mais alargada (1 a 18 anos) providenciando informação cronológica sobre a recuperação ecológica das comunidades de macroinvertebrados a longo prazo. Os resultados indicaram que as comunidades de macroinvertebrados recuperam em abundância, riqueza taxonómica e em termos de estrutura das comunidades cerca de dois anos após o impacto Num estudo a curto prazo, em ribeiros recentemente afetados por fogos florestais, foi documentada a resposta inicial dos macroinvertebrados à perturbação pelo fogo e os parâmetros analisados foram comparados com locais de referência onde não ocorreram fogos nos últimos 20 anos. Em todos os períodos amostrados registou-se menor abundância e menor riqueza específica nos ribeiros impactados, bem como diferenças ao nível da estrutura das comunidades entre locais ardidos e os locais de referência. Tanto no estudo a longo prazo como no estudo a curto prazo, foram avaliados os fatores ambientais que condicionaram a resposta das comunidades biológicas. O tamanho do rio, a extensão da área ardida, condutividade, bem como as características do canal e da vegetação ripária, são determinantes na resposta dos macroinvertebrados ao impacto do fogo, e podem influenciar o grau de susceptibilidade dos ecossistemas lóticos. Foram ainda analisados os resultados dos levantamentos a curto prazo numa abordagem do ponto de vista funcional. Foram analisadas as diferenças ao nível da diversidade funcional e ao nível da frequência das várias características funcionais dos organismos. Foram registadas diferenças pontuais em termos do grupo alimentar e estratégias de reprodução, entre locais ardidos e não ardidos. Apesar do inequívoco impacto negativo do fogo nas comunidades de macroinvertebrados aquáticos, a recuperação parece ser rápida, demonstrando a sua resiliência perante este tipo de perturbação.
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Jacobs, Francois Jakob. "The behavioural ecology of the Orange-Vaal River yellowfish in lentic and lotic ecosystems, North-West Province, South Africa / Francois Jakob Jacobs." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9514.

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Fishes are widely used by biologist as ecological indicators that measure key elements of complex systems, without having to capture the full complexity of a specific system. The Vaal River in South Africa is classified as Africa’s hardest working river and is home to, two yellowfish species that are socially and economically important. Both these yellowfish species are considered to be sensitive to changes in water quantity and quality, habitat destruction and utilisation pressure and are often used as ecological indicators to manage aquatic ecosystems. Very little however, is known about their movement, response to changing environmental variables and interspecies habitat preferences. This study therefore aims to use radio telemetry as a method to characterise and evaluate how yellowfish behaviour is influenced by changing environmental variables. To characterise the behavioural ecology of the Vaal-Orange River yellowfish species in lentic and lotic ecosystems, Labeobarbus aeneus (n=18) and L. kimberleyensis (n=3) were fitted with externally attached radio transmitters in Boskop Dam (L. aeneus, n=4) and the Vaal River (L. aeneus, n=14) (L. kimberleyensis, n=3). Various methods were used to collect yellowfish species including: gill nets, to target mobile individuals, in deep habitats, electro-fishing (electro-narcosis) to collect yellowfish in shallow habitats and angling techniques in a wide variety of habitats. Thereafter yellowfish species were sedated and tagged with externally attached radio transmitters, before being released back into the system. Yellowfish were monitored for eleven months using a remote monitoring system together with manual monitoring surveys. Analyses of data collected showed that L. aeneus follows distinct behavioural patterns, with some individual variations in behaviour. Labeobarbus aeneus exhibited higher movement that are associated with deeper water during daylight hours (04:00-16:00). During nocturnal periods (20:00-04:00) L. aeneus showed a decrease in movement activity and preferred shallower water compared to daytime. However, L. aeneus in the Vaal River seems to be less influenced by bright daylight and this might be due to the turbidity of the river water. Labeobarbus aeneus in Boskop Dam showed higher movement counts during full moon phases whereas L. aeneus in the Vaal River showed higher movement counts during new moon phases. All tagged fishes in Boskop Dam and in the Vaal River preferred deeper water during full moon phases than during new moon phases. Movement were significantly higher (P<0.05) with increased temperatures and shallower water in summer whereas movement significantly decreased (P<0.05) with a decrease in temperature and increased depth in autumn and winter. Seasonal movement data were, however, limited. This study confirms that radio telemetry methods can be used to characterise the behavioural ecology of yellowfish species. In addition, the study has improved the knowledge of how environmental variables may affect the behaviour of yellowfish species. However, due to limited data and our understanding of these species, it is still uncertain how behaviour of yellowfish species can be applied as an ecological indicator of aquatic ecosystems.
Thesis (MSc (Zoology))--North-West University, Potchefstroom Campus, 2013
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Moretto, Rafael Alberto. "Diversidade de Hydropsychidae Curtis e Leptoceridae Leach (Insecta, Trichoptera) em riachos do Parque Estadual Intervales, Serra de Paranapiacaba, Estado de São Paulo." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-09042012-145007/.

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A presente dissertação de mestrado resume-se a um estudo da diversidade de Leptoceridae e Hydropsychidae (Insecta, Trichoptera) do Parque Estadual Intervales, Estado de São Paulo, objetivando diminuir as lacunas distribucionais das espécies e facilitar o acesso de tais informações a outros pesquisadores, fornecendo subsídios taxonômicos para futuros trabalhos ecológicos ou de cunho conservacionista, aumentando assim, o conhecimento sobre as famílias Leptoceridae e Hydropsychidae e, consequentemente, sobre a ordem Trichoptera. A coleta foi realizada em dez riachos entre os meses de julho e agosto de 2010. O material coletado foi triado, preparado e identificado até o nível taxonômico de espécie. Análises quantitativas e testes estatísticos foram realizados para a determinação da riqueza e a abundância das duas famílias, além de, a partir das informações bióticas e abióticas nos diferentes riachos e das localidades de coleta, tentar inferir quais fatores ambientais são determinantes na distribuição faunística de tricópteros entre os diferentes riachos. Foi criada também uma checklist para as espécies de Leptoceridae e Hydropsychidae que ocorrem no Parque Estadual Intervales. Com a análise do material coletado, foi possível o reconhecimento de novas espécies e novos registros de espécies para o Estado de São Paulo. As novas espécies foram descritas ou encaminhadas para tricopterólogos especialistas, aumentando assim o conhecimento taxonômico do grupo em questão e contribuindo diretamente para a diminuição entre a diferença no número de espécies descritas na literatura e as estimativas do número de espécies existentes.
This dissertation summarizes a study of the diversity of Leptoceridae and Hydropsychidae (Insecta, Trichoptera) in Parque Estadual Intervales streams, State of São Paulo, aiming to reduce the distributional gaps of species and facilitate the access of such information to other researchers, providing subsidies for future taxonomic or ecological studies and for nature conservation, and increasing the knowledge about the families Leptoceridae and Hydropsychidae and, consequently, of the order Trichoptera. Data were obtained between July and August 2010, when ten streams were sampled. The collected material was sorted, prepared and identified to the taxonomic level of species. Quantitative analysis and statistical tests were performed to determine the richness and abundance of the two families. Biotic and abiotic information from different streams and sampling localities were also analysed, trying to infer which environmental factors are determinant in the distribution of the fauna of caddisflies. A checklist of the species of Leptoceridae and Hydropsychidae from Parque Estadual Intervales is also presented. The analysis of the collected material showed the presence of new species; these were described or sent to experts, thus increasing the taxonomic knowledge of the Trichoptera and contributing to decrease the difference between the number of described species and estimates of the number of existing species.
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Fiuza, Patricia Oliveira. "Fungos ingoldianos em algumas ?reas do semi?rido brasileiro." Universidade Estadual de Feira de Santana, 2013. http://localhost:8080/tede/handle/tede/184.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
Ingoldian fungi are aquatic hyphomycetes that presents conidia sigmoid or branch and occur in lotic and lentic environment, being easily found in foam of water bodies. Aiming to contribute to the knowledge of the biodiversity of Ingoldian fungi in semiarid region, was conducted an inventory in water bodies of areas of extreme biological importance of the Brazilian semiarid. In a single expedition, samples of foam and submerged leaves were collected in water bodies of four localities in semiarid region (Brejo Paraibano-PB, Serra da Jib?ia-BA, Chapada do Araripe and Serra de Ibiapaba-CE). The samples of foam were collected and packaged in plastic bottles of 250 mL and the submerged leaves were packaged in plastic bags. In ?Laborat?rio de Micologia?(LAMIC), the foam was homogenized and 200 ?L of each sample were transferred to 30 slides, which were exposed at room temperature to evaporation. After evaporation, was addition of one drop of lactic acid and sealed with nail polish. Samples of submerged leaves were subjected to the technique of washing in flowing water and cut into pieces of 1 cm?, that were placed in petri dishes containing distilled sterile water for observation of fungi. The bottles and slides were deposited in the ?Herb?rio da Universidade Estadual de Feira de Santana? (HUEFS). The pure cultures were deposited in the ?Cole??o de Cultura de Micro-organismos da Bahia? (CCMB). The first chapter presents all 27 taxa of Ingoldian fungi found in the study, 23 of these taxa present description, geographic distribution, taxonomic comments and illustration; 22 are new records: american continent (3), Neotropics (1), South America (3), Brazil (5), Brazilian semiarid region (7), Cear? (2) and Para?ba (1). The second chapter shows all species of the genus Campylospora with descriptions, comments, geographical distribution, a key to the genus and illustrations. The water body with the highest number of taxa of Ingoldian fungi was the river Miss?o velha.
Os fungos ingoldianos s?o hifomicetos aqu?ticos que apresentam con?dios sigmoides ou ramificados e ocorrem em ambientes l?ticos e l?nticos, sendo encontrados facilmente nas espumas de corpos d??gua. Visando contribuir com o conhecimento da biodiversidade de fungos ingoldianos na regi?o semi?rida foi realizado um invent?rio em corpos d??gua de ?reas de extrema import?ncia biol?gica do semi?rido brasileiro. Em uma expedi??o, amostras de espuma e folhas submersas foram coletadas em corpos d??gua de quatro localidades na regi?o semi?rida (Brejo Paraibano-PB, Serra da Jib?ia-BA, Chapada do Araripe e Serra de Ibiapaba-CE). As amostras de espuma foram coletadas e acondicionadas em frascos pl?sticos de 250 mL e as amostras de folhas submersas foram acondicionadas em sacos pl?sticos. No Laborat?rio de Micologia (LAMIC), a espuma foi homogeneizada e 200 ?L de cada amostra foram transferidos para 30 l?minas, as quais ficaram expostas ? temperatura ambiente para evapora??o. Ap?s a evapora??o, foi adicionada uma gota de ?cido l?ctico e vedada com esmalte. Amostras de folhas submersas foram submetidas ? t?cnica de lavagem em ?gua corrente e cortadas em peda?os de 1 cm?, os quais foram colocados em placas de Petri com ?gua destilada esterilizada para observa??o dos fungos. Os frascos e l?minas foram depositados no Herb?rio da Universidade Estadual de Feira de Santana (HUEFS). As culturas puras foram depositadas na Cole??o de Cultura de Microrganismos da Bahia (CCMB). O primeiro cap?tulo apresenta todos os 27 t?xons de fungos ingoldianos encontrados no estudo, 23 destes t?xons apresentam descri??o, distribui??o geogr?fica, coment?rios taxon?micos e ilustra??o; 22 representam novos registros: continente americano (3), Neotr?pico (1), Am?rica do Sul (3), Brasil (5), regi?o semi?rida brasileira (7), Cear? (2), Para?ba (1). O segundo cap?tulo apresenta todas as esp?cies do g?nero Campylospora, com descri??es, coment?rios taxon?micos, distribui??o geogr?fica, chave taxon?mica para o g?nero e ilustra??es. O corpo d? ?gua que apresentou o maior n?mero de t?xons de fungos ingoldianos foi o rio Miss?o Velha.
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Wheeler, Christopher C. "The Ecosystem Role of Fishes in Lotic Environments." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3694.

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It is important for humans to understand how ecosystems work because we depend on them for a variety of products and services. For example, rivers and streams provide fisheries, improved water quality, and recreational opportunities to many individuals. In rivers, interactions among fishes, other stream plants and animals, and the physical river environment can influence continued provision of these valuable services. However, the role played by many freshwater fishes in the provision of these services remains unknown. Additionally, it is important to identify different factors that affect the outcome of interactions involving riverine fishes. To address these issues, I evaluated how fishes influence different properties of rivers and streams, using a combined approach that summarized previous studies of fish effects on trophic structure and organic matter processing and incorporated field work in natural systems. Overall, my work demonstrated that fishes can play important roles in rivers and streams. In particular, fish spawning migrations from lakes to streams can introduce nutrients to streams. Compared with other nutrient sources for streams, nutrients delivered by fish migrations can be substantial, and they may be used by other plants and animals in the stream to increase productivity. Beyond nutrient introduction, the physical disturbance of river sediments caused by the spawning activity of large migratory fishes can influence the availability of food resources for other stream animals. Additionally, my summary of previous fish studies indicated the consistent influence of fishes on nutrient dynamics and other stream organisms. While the role of riverine fishes varies, natural resource managers and researchers should focus on understanding how these widespread organisms influence valuable ecosystem services derived from freshwater resources.
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Books on the topic "Lotic ecosystems"

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Reynolds, Keith M. Fuzzy logic knowledge bases in integrated landscape assessment: Examples and possibilities. [Portland, OR]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2001.

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Reynolds, Keith M. Fuzzy logic knowledge bases in integrated landscape assessment: Examples and possibilities. [Portland, OR]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2001.

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Reynolds, Keith M. Fuzzy logic knowledge bases in integrated landscape assessment: Examples and possibilities. Portland, OR: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2001.

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Lundberg, Chris H. Effects of grazing and nitrogen enrichment on the taxonomic structure of periphyton assemblages in lotic ecosystems. 1996.

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Schlaepfer, Martin A. Introduced species are not always the enemy of conservation. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198808978.003.0006.

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This chapter tells the story of how a few biologists came to question whether non-native species were being objectively evaluated with regard to their threat to biodiversity and ecosystems. The chapter examines the criteria that are commonly used to evaluate whether species should be labeled as invasive aliens, and suggests there is merit in assessing both the positive and negative contributions of species. Because invasion biology is a heavily value-laden field in which logic does not always reign, there is resistance to considering the benefits that might accrue from non-native species. Now is the time to think hard about which species are likely to cause clear harm so that management interventions can be aimed where they are most needed, and limited resources are not squandered on relatively harmless ecological invasions.
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van, José. Introduction. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190889760.003.0001.

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The introduction puts forward the notion of the “platform society,” which emphasizes the inextricable relation between online platforms and societal structures. It refers to a society in which social and economic traffic is increasingly channeled by a (corporate) global online platform ecosystem that is driven by algorithms and fueled by data. In turn, an online platform should be understood as a programmable digital architecture designed to organize interactions between users—not just end users but also corporate entities and public bodies. It is geared toward the systematic collection, algorithmic processing, circulation, and monetization of user data. Crucially, platforms cannot be seen apart from each other but evolve in the context of an online setting that is structured by its own logic.
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van, José. Healthcare and Health Research. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190889760.003.0006.

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This chapter focuses on the platformization of the health sector. A burgeoning field of online health platforms has emerged, ranging from personal fitness apps to medical platforms that are used by patients, doctors, and researchers. A global industry of health-related platforms is being stacked onto, and interwoven with, the infrastructural core of the ecosystem; developing sectoral health platforms is a potentially lucrative and data-rich area that major operators are keen to invest in. Examining health platforms, the chapter unravels a peculiar double-edged logic in how their benefit is argued: they offer personalized data-driven services to their customers, while simultaneously serving an overarching public interest in medical research, the outcomes of which ostensibly benefit everyone. Using the platform mechanisms as an analytical prism, the chapter scrutinizes three single platforms, which are illustrative of the health sector: 23andMe, PatientsLikeMe, and Parkinson mPower.
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Book chapters on the topic "Lotic ecosystems"

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Allan, J. David. "Organic matter in lotic ecosystems." In Stream Ecology, 259–81. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_12.

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Bruns, Dale A., G. Bruce Wiersma, and G. Wayne Minshall. "Problems of Long-Term Monitoring of Lotic Ecosystems." In Global Climate Change and Freshwater Ecosystems, 285–307. New York, NY: Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2814-1_14.

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Ramachandra, T. V., M. D. Subash Chandran, N. V. Joshi, B. Karthick, and Vishnu D. Mukri. "Ecohydrology of Lotic Systems in Uttara Kannada, Central Western Ghats, India." In Environmental Management of River Basin Ecosystems, 621–65. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13425-3_29.

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Schwendel, Arved C. "Measurement of Stream Bed Stability Characteristics Relevant to Lotic Ecosystems." In Management of Mountain Watersheds, 113–22. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2476-1_9.

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Statzner, B. "Characteristics of Lotic Ecosystems and Consequences for Future Research Directions." In Ecological Studies, 365–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71630-0_18.

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Veras, Ana Sibelonia Saldanha, Diogo Guedes Vidal, Nelson Azevedo Barros, and Maria Alzira Pimenta Dinis. "Sustainability Perception of Lotic and Lentic Ecosystems in the Amazon Basin Through the Lens of a Local Community." In Sustainable Policies and Practices in Energy, Environment and Health Research, 3–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-86304-3_1.

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Karimov, B. K., and V. N. Talskikh. "Biodiversity of Indicator Biocenoses of Lotic Ecosystems of the Aral Sea Basin, Central Asia, Used in Hydrobiological Monitoring." In Biodiversity, Conservation and Sustainability in Asia, 1031–61. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-73943-0_57.

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Fortunato, Michael W.-P., and Morgan R. Clevenger. "Revisiting Entrepreneurial Communities, Entrepreneurial Ecosystems, and Ecosystem Logic." In Entrepreneurial Communities and Ecosystems, 25–55. New York: Routledge, 2022. http://dx.doi.org/10.4324/9781351045711-2.

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Schaffer, Norman, Martin Engert, Guido Sommer, Jasmin Shokoui, and Helmut Krcmar. "The Digitized Ecosystem of Tourism in Europe: Current Trends and Implications." In Information and Communication Technologies in Tourism 2021, 352–64. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65785-7_34.

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AbstractEmerging digital technologies enable the creation of new services and business models, leading to ecosystems’ continuous change. In the tourism industry, new digital-savvy players like Airbnb have entered and created entirely new market segments, while many existing players are challenged to redefine their business logic. However, the literature does not provide a generic overview of the value network in tourism, including new market players, and their ways of interacting. Therefore, this paper develops a current overview of the value network of the European tourism ecosystem. By analyzing the business models and value streams of 704 European enterprises based on Crunchbase data, we identified 27 distinct roles and their respective interrelations in the domain. To validate the proposed value network, we conducted five expert interviews. Our results highlight the continuously growing importance of intermediaries in tourism. Furthermore, new technology players offer new opportunities for innovative services, creating high dynamism in the industry. Nonetheless, local entities, such as residents and communities, play a central role in European tourism and need to be included in experiences provided to tourists. Scholars and practitioners might use the results to identify disruptive actors and opportunities for innovation and niche creation. Additionally, the results can be used as a basis for further analysis of the ecosystem’s ongoing changes induced through technological advancements or external events such as the COVID-19 pandemic.
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Siltaloppi, Jaakko, and Heiko Wieland. "Institutional Change in Service Ecosystems." In The SAGE Handbook of Service-Dominant Logic, 299–315. 1 Oliver's Yard, 55 City Road London EC1Y 1SP: SAGE Publications Ltd, 2018. http://dx.doi.org/10.4135/9781526470355.n18.

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Conference papers on the topic "Lotic ecosystems"

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Bulat, Dumitru, Denis Bulat, Marin Usatii, Nina Fulga, Oleg Crepis, Nicolae Saptefraţti, and Rostislav Chelmenciuc. "Particularităţile ihtiofaunei din zona de confluență a râului Răut cu fluviul Nistru în perioada reproductivă." In International symposium ”Functional ecology of animals” dedicated to the 70th anniversary from the birth of academician Ion Toderas. Institute of Zoology, Republic of Moldova, 2019. http://dx.doi.org/10.53937/9789975315975.73.

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At present, particular attention is paid to large rivers without realizing that the ecological status of a large lotic ecosystem depends on the state of its tributaries. Thus, in the conditions of growing anthropogenic presetting, we aimed to demonstrate the importance of the ecotone zones formed between two riparian ecosystems of different sizes, in order to ensure the welfare of the fish resources on both sides.
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Rassadina, Ekaterina V., and Natalya A. Mitrofanova. "ECOMONITORING OF LOTHIC ECOSYSTEMS ON THE EXAMPLE OF THE SVIYAGI RIVER." In Treshnikov readings – 2022 Modern geographical global picture and technology of geographic education. Ulyanovsk State Pedagogical University named after I. N. Ulyanov, 2022. http://dx.doi.org/10.33065/978-5-907216-88-4-2022-163-165.

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Palhemus, Dan A. "Riffle bugs of Madagascar (Heteroptera: Veliidae): An insular radiation in freshwater lotic ecosystems." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.94073.

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Raharivelo, Sitraka Oliva, and Jean-Pierre Müller. "Modeling Institutions in Socio-Ecosystems." In Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California: International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/688.

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In socio-ecosystems, human activities are structured in time and space by interactions between different regulatory systems with different collective goals. These regulatory systems are modeled by institutions and organizations, and the regulatory mechanisms by norms applied to agents in Multi-Agent Systems (MAS). However, little is said about sharing resources, space and time. In particular, temporal and spatial expressivity is often limited in MAS for institutions and norms. This research proposes an institutional MAS model capable of representing multiple institutions and norms in the socio-ecosystem, in order to account for the multiplicity of interactions through agents, resources, space and time. We propose an extension of Descriptive Logic for the description of institutions and norms, and use Allen's algebra and the RCC8 to represent time and space. The resulting model allows us to know the norms applicable to an agent located socially, spatially and temporally.
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Minhas, Umar, Roger Woods, and Georgios Karakonstantis. "Facilitating Easier Access to FPGAs in the Heterogeneous Cloud Ecosystems." In 2018 28th International Conference on Field Programmable Logic and Applications (FPL). IEEE, 2018. http://dx.doi.org/10.1109/fpl.2018.00083.

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Abreu, Antonio, Jose Duarte Moleiro Martins, and J. M. F. Calado. "Fuzzy Logic Model to Support Risk Assessment in Innovation Ecosystems." In 2018 13th APCA International Conference on Automatic Control and Soft Computing (CONTROLO). IEEE, 2018. http://dx.doi.org/10.1109/controlo.2018.8514281.

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ZadJabbari, B., S. Mohseni, and P. Wongthongtham. "Fuzzy logic based model to measure knowledge sharing." In 2009 3rd IEEE International Conference on Digital Ecosystems and Technologies (DEST). IEEE, 2009. http://dx.doi.org/10.1109/dest.2009.5276692.

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Lee, Seung-Mok, and Hyun Myung. "Interval type-2 fuzzy logic controllers for flocking behavior." In 2011 5th IEEE International Conference on Digital Ecosystems and Technologies (DEST). IEEE, 2011. http://dx.doi.org/10.1109/dest.2011.5936637.

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Wahab, Muhammad Abdul, Pascal Cotret, Mounir Nasr Allah, Guillaume Hiet, Vianney Lapotre, and Guy Gogniat. "Towards a hardware-assisted information flow tracking ecosystem for ARM processors." In 2016 26th International Conference on Field Programmable Logic and Applications (FPL). IEEE, 2016. http://dx.doi.org/10.1109/fpl.2016.7577396.

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"Application of Logic and Decision Models in Sustainable Ecosystem Management." In 2009 42nd Hawaii International Conference on System Sciences. IEEE, 2009. http://dx.doi.org/10.1109/hicss.2009.73.

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