Bibliografías temáticas / Stream ecology

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Literatura académica sobre el tema "Stream ecology"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 29 de julio de 2024

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Artículos de revistas sobre el tema "Stream ecology"

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Waters, Thomas F. "Stream Ecology". Ecology 77, n.º 6 (septiembre de 1996): 1953. http://dx.doi.org/10.2307/2265801.

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Findlay, Stuart. "Stream microbial ecology". Journal of the North American Benthological Society 29, n.º 1 (marzo de 2010): 170–81. http://dx.doi.org/10.1899/09-023.1.

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Füreder, Leopold y Georg H. Niedrist. "Glacial Stream Ecology: Structural and Functional Assets". Water 12, n.º 2 (30 de enero de 2020): 376. http://dx.doi.org/10.3390/w12020376.

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High altitude glacier-fed streams are harsh environments inhabiting specialized invertebrate communities. Most research on biotic aspects in glacier-fed streams have focused on the simple relationship between presence/absence of species and prevailing environmental conditions, whereas functional strategies and potentials of glacial stream specialists have been hardly investigated so far. Using new and recent datasets from our investigations in the European Alps, we now demonstrate distinct functional properties of invertebrates that typically dominate glacier-fed streams and show significant relationships with declining glacier cover in alpine stream catchments. In particular, we present and argue about cause-effect relationships between glacier cover in the catchment and temperature, community structure, diversity, feeding strategies, early life development, body mass, and growth of invertebrates. By concentrating on key taxa in glacial and non-glacial alpine streams, the relevance of distinct adaptations in these functional components becomes evident. This clearly demonstrates that further studies of functional characteristics are essential for the understanding of peculiar diversity patterns, successful traits and their plasticity, evolutionary triggered species adaptions, and flexibilities.
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Cecala, Kristen, Michael Dorcas y Steven Price. "Ecology of juvenile Northern watersnakes (Nerodia sipedon) inhabiting low-order streams". Amphibia-Reptilia 31, n.º 2 (2010): 169–74. http://dx.doi.org/10.1163/156853810791069029.

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AbstractThe juvenile stage for many reptiles is considered “the lost years” because of low capture probabilities, however understanding factors impacting juvenile survivorship and recruitment is critical for conservation of populations. We studied the ecology of juvenile Northern watersnakes, Nerodia sipedon, by intensively sampling a first-order stream and determined the occupancy of juveniles in 30 low-order streams in the Piedmont of North Carolina. Juveniles were relatively abundant within a single stream (n = 62 ± 9), and their capture probabilities were positively related to increasing stream-water temperatures. We also found that juveniles had high survivorship (ϕ = 0.87 ± 0.017). Occupancy of juvenile N. sipedon in low-order, Piedmont streams may be greater at streams that have confluences with high order streams or lakes, which potentially support adult N. sipedon populations. This study provides important information regarding the natural history of juvenile reptiles and indicates the importance of low order streams as habitat for N. sipedon populations.
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Soares, Bruno Eleres y Gabriel Nakamura. "ECOLOGIA FILOGENÉTICA DE COMUNIDADES DE PEIXES DE RIACHO NEOTROPICAIS". Oecologia Australis 25, n.º 02 (16 de junio de 2021): 433–48. http://dx.doi.org/10.4257/oeco.2021.2502.13.

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Neotropical stream fishes exhibit a complex evolutionary history and encompass both old and recent lineages. Patterns of species diversity of stream fishes are relatively well-studied for Neotropical streams, but not for patterns of clade distribution and historical factors that structure these assemblages, which are the main interests of phylogenetic ecology. Understanding the evolutionary context of communities provides important insights into large-scale mechanisms that structure them. This review aims to: (i) discuss the main concepts of phylogenetic ecology and its application to Neotropical stream fishes; and (ii) highlight the main methods applied in this background. The first section presents the main phylogenetic hypothesis of fishes and discusses how their gaps in Neotropical stream fishes hinder phylogenetic ecology. Afterward, we discuss the main concepts of phylogenetic ecology (phylogenetic signal, community phylogenetic structure, and phylogenetic diversity), as well as gaps and potential applications of these concepts and tools to understand Neotropical stream fish assemblages. The second section introduces the main methods to address the phylogenetic ecology, including a standardized procedure to edit fish phylogenetic trees, comparative methods, and indices and analytical tools to understand community structure and conservation importance. Finally, we discuss the perspectives to the next years to better understand the Neotropical stream fish assemblages in the light of past and current historical processes.
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Dolinsek, Ivan J., Robert L. McLaughlin, James W. A. Grant, Lisa M. O’Connor y Thomas C. Pratt. "Do natural history data predict the movement ecology of fishes in Lake Ontario streams?" Canadian Journal of Fisheries and Aquatic Sciences 71, n.º 8 (agosto de 2014): 1171–85. http://dx.doi.org/10.1139/cjfas-2013-0294.

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Little is known about the movements of most stream fishes, so fisheries managers often rely on natural history data from the literature to make management decisions. Observations of over 15 000 individuals from 37 species across 3 years were used to evaluate four aspects of the reliability of literature data for predicting the movement behaviour of stream fishes: (i) water temperature when fish enter streams; (ii) reasons for moving into the streams; (iii) stream residence times of migrants; and (iv) relative use of lake and stream habitats. Comparisons of our data for arrival times in the streams, water temperature at arrival, and time spent in the streams were highly correlated with literature data, whereas relative use of the lake was not. Further, our detailed data revealed two novel findings: (1) in many species juveniles were also moving into streams, even in those species where adults were clearly spawning in the streams; and (2) adult-sized individuals were moving into streams for nonreproductive purposes. Our results suggest that fishery managers can confidently use natural history information to gain general insights into the movement ecology of fishes, but should also recognize that this information remains incomplete in important ways.
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Findlay, Stuart, Robert Hall y William V. Sobczak. "Methods on stream ecology". Limnology and Oceanography 43, n.º 5 (julio de 1998): 1020–21. http://dx.doi.org/10.4319/lo.1998.43.5.1020.

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Stout, Ben. "Methods in Stream Ecology". Journal of the North American Benthological Society 27, n.º 1 (marzo de 2008): 223. http://dx.doi.org/10.1899/27.1.br.157.

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Wipfli, Mark S., F. Richard Hauer y Gary A. Lamberti. "Methods in Stream Ecology." Ecology 78, n.º 3 (abril de 1997): 960. http://dx.doi.org/10.2307/2266075.

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Fletcher, Melanie. "Methods in Stream Ecology". Freshwater Biology 53, n.º 12 (diciembre de 2008): 2639. http://dx.doi.org/10.1111/j.1365-2427.2008.02042.x.

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Tesis sobre el tema "Stream ecology"

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Evers, Stephanie. "The role of forest stream corridor characteristics in influencing stream and riparian ecology". Connect to e-thesis, 2008. http://theses.gla.ac.uk/184/.

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Thesis (Ph.D.) - University of Glasgow, 2008.
Ph.D. thesis submitted to the Division of Environmental and Evolutionary Biology, Institute of Biomedical and Life Sciences, University of Glasgow, 2008. Includes bibliographical references.
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Evers, Stephanie L. "The role of forest stream corridor characteristics in influencing stream and riparian ecology". Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/184/.

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This PhD thesis seeks to consider conifer forestry stream corridor design in relation to both in-stream and riparian zone biodiversity and functioning. The contribution, availability and source of basal resources within varying corridor conditions are the focus of this project. This approach is combined with surveys of community diversity on a number of key trophic scales in order to determine how the corridor characteristics and their associated resource availability, affects community structure. The effects of varying design and management of the riparian buffer zones within afforested stream systems on in-stream and overall habitat diversity and functioning remains largely unknown. Although guidelines have been implemented for several years (Forest and Water Guidelines, Forestry Commission), recommendations, although based on sound assumptions, are subjective assessments and tend not based on scientific research or data. As such, the premise of this project is to consider a variety of corridor physical parameters adjacent to low-order streams within two afforested catchments in South-West Scotland, between 2003 and 2005, in order to contribute to the understanding of system functioning within the limitations of forestry land-use and management. A number of different approaches were employed in order to define the proportional contributions of allochthonous and autochthonous material within the benthos of the stream systems. This was done in order to define resource availability, biofilm characteristics, stream functioning and the role of corridor design in influencing resource availability. Yet, despite significant autochthonous productivity, allochthonous organic matter was the primary resource utilised by many taxa. However, conversely, light regime was found to be fundamental in shaping production and community structure within these ecosystems. Consequently, here I explore a number of different trophic scale responses to riparian conditions in order to define the biotic responses to variation of resource availability, with the aim of contributing information which may aid in design and management of afforested riparian zones.
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Grudzinski, Bartosz Piotr. "Influence of watershed grazing management on stream geomorphology in grassland headwater streams". Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18688.

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Doctor of Philosophy
Department of Geography
Melinda D. Daniels
This dissertation increases our understanding of the drivers that shape and maintain grassland streams and their watersheds by examining the influence of grazing management practices on suspended sediment concentrations, bare ground production, and changes to channel geomorphology. Chapter 2 demonstrates that cattle grazing produces significantly higher baseflow suspended sediment concentrations relative to bison grazing. Suspended sediment concentrations within bison-grazed streams are similar to ungrazed streams, indicating that the substitution of cattle for bison has resulted in degradation of baseflow water quality in grassland streams. Burning frequency, discharge, and seasonality are also significant drivers of suspended sediment concentrations, but are generally less influential than grazing treatments. Chapter 3 indicates that high density cattle grazing treatments produce more bare ground within the riparian zones of grassland stream networks, particularly underneath tree canopy cover. The increased bare ground coverage within riparian areas is correlated with increased suspended sediment concentrations during baseflow conditions, while watershed-scale bare ground production is correlated with increased suspended sediment concentrations during storm flow events. Chapter 4 demonstrates channel geometry and sedimentology are significantly influenced by grazing treatments. This dissertation is the first study to comparatively evaluate the relative influence between cattle and bison grazing on stream geomorphology within any environment. Insight gained from this project can be used by public and private land use managers to improve the environmental integrity of native grassland ecosystems.
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Alberts, Jeremy M. "Riverscapes in a Changing World: Assessing the Relative Influence of Season, Watershed- , and Local-scale Land Cover on Stream Ecosystem Structure and Function". University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479822898487528.

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Imholt, Christian. "Ecological significance of stream thermal regimes". Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=166176.

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This thesis aimed to provide improved understanding of the spatial and temporal variability of stream temperature, the influence of riparian woodlands on thermal regimes and examples of the ecological consequences of different thermal regimes.  First, the spatial and temporal variability of temperature within a large montane river basin at nested spatial scales was established.  It was from this analysis that (i) variation that can occur at all spatial scales was observed, (ii) different physical factors are controlling these variations at all scales, and (iii) greatest differences occur between different tributaries.  The extent of riparian forestry proved to be in important factor in determining river temperatures.  The results suggest that broadleaved tree species within the riparian zone are more able to reduced incoming solar radiation and consequently control stream temperature.  This highlights the potential of riparian plantings in mitigation efforts against high temperatures under future climate scenarios.  To complement these empirical assessments, the ecological significance of observed thermal variability was assessed in a laboratory study of the growth of juvenile Atlantic salmon.  The effects of the temperature regime on growth were in the range of about 3% reduction in final length in the variable regime compared to the constant one.  Relations between invertebrate growth, adult emergence patterns and thermal regime differences related to riparian cover were assessed in relation to the mayfly Baetis rhodani.  Statistically significant differences in mean size and size distribution of Baetis were found in the Girnock, between all sites separated by no more than 5 km.
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Troia, Matthew John. "A mechanistic framework for understanding prairie stream fish distributions". Diss., Kansas State University, 2014. http://hdl.handle.net/2097/17285.

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Doctor of Philosophy
Department of Biology
Keith B. Gido
A fundamental goal of ecology is to understand environmental associations of species. These associations can provide a basis for predicting spatial distributions in contemporary habitats as well as how those distributions might change in response to anthropogenic environmental change. Developing species distribution models is limited by an incomplete understanding of functional traits, spatial scaling, and the mechanisms and generalities of correlations among abundance and environmental gradients. I address these four issues using observational and experimental approaches. First, I tested opposing mechanisms of community assembly by measuring the dispersion (i.e., diversity) of three types of functional strategies at three spatial scales and along environmental gradients. I found that communities are assembled via abiotic environmental filtering, but the strength of this filtering depends on the spatial scale of investigation, longitudinal network position, and type of functional strategy. Second, I quantified community-environment relationships across thirteen sub-basins, nested within the three major basins within Kansas to evaluate the consistency (i.e., generality) in predictive capability of environmental variables among sub-basins and across spatial extents. I found that longitudinal network position is consistently the strongest predictor of community composition among sub-basins, but in-stream and catchment predictors become stronger correlates of community composition with increasing spatial extent. Third, I used environmental niche models to quantify distributions of four pairs of congeneric cyprinids and found that species within each pair exhibited contrasting stream-size preferences. I then used field experiments to test for differences in individual-level performance between one pair of species (Pimephales notatus and P. vigilax) along a gradient of stream size. I found that adult spawn success and juvenile growth and condition increased with stream size for both species, indicating that these congeners respond similarly to abiotic gradients associated with the river continuum. I concluded that complementary distributions are a consequence of biotic interactions, differential environmental filtering evident in an unmeasured performance metric, or differential environmental filtering by an environmental factor operating at longer timescales. These studies demonstrate the context dependencies of characterizing habitat associations of stream fishes, but also reveal the general importance of stream size and associated environmental gradients in structuring stream fish communities.
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Chan, Pui-lok Bosco. "Sustainability and biodiversity : the impact, alternative design and prospects of restoration of channelized lowland streams in Hong Kong /". Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B4257612X.

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Edwards, Francois K. "Fish presence and the ecology of stream invertebrate predators". Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/14773.

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This thesis describes the ecology of invertebrate predators (Plecoptera and Trichoptera) across steams, some without fish. Focusing primarily on stoneflies of the families Perlidae and Perlodidae, I studied the density and diversity of predators and the invertebrate prey, predator diet, size-mass relationships and microhabitat use. The abundance of invertebrate predators varied across streams and seasons but numbers of predatory invertebrates did not differ with fish presence. Only the smallest species of invertebrate predator was more abundant in substrate complexes in streams with fish. Overall biomass of invertebrate predators was lower in streams with fish, because the size-class distributions of some species were biased towards small individuals. The size-mass relationships and pre-emergent weights of all predators, except the Perlidae, varied across sites, but there was no clear relationship between condition and fish presence/absence. Invertebrate predators were mainly carnivorous in fishless sites, but in some species diet broadened with fish presence to include more algae. I hypothesise that the fixed nocturnal habit of Perlidae, permitted by their slower growth, accounted for the similarity in abundance, size, condition and diet across streams. Nocturnal activity and the coarse stony substrate which provided abundant refugia, minimised any effect of fish. By contrast, Perlodidae and other predators have shorter life cycles, forage by day and night, and have greater growth requirements, accounting for the greater variability in size and condition across streams. Though these species should incur greater exposure to fish, the coarse substrate may provide foraging space free from predation risk, thus minimising any effects of fish. For stream invertebrate predators, direct predation effects of fish appear to be minimal and principal effects may be sublethal, indirect, and prey mediated.
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Fralick, Kasey Elizabeth. "BASAL RESOURCE COMPOSITION AND MACROINVERTEBRATE COMMUNITY STRUCTURE IN TALLGRASS, MIXED-GRASS, AND SHORTGRASS PRAIRIE HEADWATER STREAMS". OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2643.

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North American prairie headwater streams are highly threatened and relatively poorly studied. Most studies on prairie streams have occurred at the Konza Prairie Biological Station, a tallgrass prairie Long Term Ecological Research site in the Flint Hills ecoregion near Manhattan, KS. According to the Stream Biome Gradient Concept, several ecosystem factors vary along a gradient from more allochthonous forested streams to more autochthonous desert streams, with grassland streams often intermediate in several key ecological factors including litter inputs, primary production, and invertebrate abundance and biomass. However, few studies have examined the degree of variation that exists within prairie headwater streams, and whether this variation occurs along a longitudinal gradient as well, with more mesic tallgrass prairie streams differing from more xeric shortgrass prairie streams, and mixed-grass sites intermediate between the two. I examined thirteen prairie headwater stream sites in the central United States from 2014 to 2017. My objective was to determine whether basal resource composition – including standing stocks of coarse particulate organic matter (CPOM), fine particulate organic matter (FPOM), and very fine particulate organic matter (VFPOM), sestonic and benthic chlorophyll-a levels, and sources of CPOM – differed significantly among streams in tallgrass, mixed-grass, and shortgrass prairie regions. In addition, I examined whether invertebrate communities differed among tallgrass, mixed-grass, and shortgrass prairie regions, and whether this was reflected in the functional feeding group composition, habit composition, voltinism, and dispersal ability of invertebrate communities. There were no significant differences in total CPOM, FPOM, and VFPOM standing stocks among regions. However, CPOM composition did differ with region, with tallgrass sites having higher standing stocks of leaf litter, but lower standing stocks of grass litter and macrophyte litter than the other regions. Benthic chlorophyll-a did not differ significantly among regions, but there were lower sestonic chlorophyll-a levels in tallgrass sites. Given higher light availability and nutrient levels in shortgrass and mixed-grass streams, lack of stable substrata may be limiting benthic algae in these regions. Invertebrate abundance and biomass were highest in mixed-grass sites and lowest in tallgrass sites, with shortgrass sites intermediate. Mixed-grass sites also had significantly higher Shannon diversity and taxa richness than tallgrass sites. A NMDS revealed that sites differed in overall community structure. Functional feeding group composition did not differ significantly across regions, with collector-gatherers, followed by predators, dominating in all sites. High Predator-Prey Index (predator biomass: other invertebrate biomass) values in each region indicates strong top-down pressure and high turnover rates of prey taxa. While there was a weak correlation between leaf litter AFDM and invertebrate community structure, the correlation between latitude and longitude and invertebrate community structure was much higher, indicating that basal resources may not be the main drivers in these systems. Invertebrate habit composition did not differ with region; all regions were dominated by taxa preferring fine substrata (burrowers and sprawlers). All regions showed selection against semivoltine invertebrates and were dominated by high dispersing insect taxa, though the proportion of the insect community that consisted of high dispersers did not differ significantly with region. My results suggest that generalizing about prairie streams based on studies from one or a handful of sites may not be prudent, at least for some aspects. The higher proportion of autochthonous inputs in shortgrass and mixed-grass regions may drive increased invertebrate abundance, biomass, richness, and diversity, but the relative hydrologic stability of the mixed-grass sites might also explain these results or have an interactive or additive relationship with primary production. Overall, the link between basal resources and communities across prairie types was somewhat weak, and all regions were dominated by collector-gatherers with rapid life-cycles and high dispersal abilities, indicating that disturbance may be a more important community filter than basal resource composition. Streams in all three regions have highly variable hydrology, and this may be an overriding factor that results in similarity in communities.
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Melin, Mattias. "Stream size determines densities of larger juvenile brown trout in mountain streams". Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-183936.

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The productivity or availability of juvenile habitats have theoretically been shown to determine size distributions of adult individuals and population abundance. Brown trout (Salmo trutta) is a species where adults may inhabit lakes and use connected streams for spawning and as nursery habitats for juveniles. This project aimed to estimate what factors determine the density and growth of juvenile brown trout in mountain streams. This was done by sampling 21 mountain streams for juvenile brown trout densities and growth, habitat availability and stream size, productivity, and resource availability. Additional data were obtained from other mountain streams from the Swedish Electrofishing Register. My results showed that measures of stream productivity and estimated benthic resource availability did not affect the densities and biomass of older juvenile brown trout. Instead, higher densities of older juvenile brown trout were related to increasing stream size (stream width x water depth). This is likely due to interference competition for space, where territory size influences the growth and densities of brown trout in streams but also that larger streams can provide refuges for larger individuals during periods of drying and thermal stress. This indicates that my estimate of stream size is an important factor determining densities of older juvenile brown trout in low-productive mountain streams. Stream size can be suggested to be a used as proxy for density and production of larger juvenile brown trout and therefore it may also be used to predict adult lake-living brown trout population size structure and abundance.
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Libros sobre el tema "Stream ecology"

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Allan, J. David, María M. Castillo y Krista A. Capps. Stream Ecology. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61286-3.

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Allan, J. David. Stream Ecology. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7.

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Allan, J. David y Marí M. Castillo. Stream Ecology. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5583-6.

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Richard, Hauer F. y Lamberti Gary Anthony, eds. Methods in stream ecology. 2a ed. San Diego, Calif: Academic Press/Elsevier, 2006.

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Fleisher, Paul. Mountain stream. New York: Benchmark Books, 1998.

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Sayre, April Pulley. River and stream. New York: Twenty-First Century Books, 1996.

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Gordon, Nancy D. Stream Hydrology. New York: John Wiley & Sons, Ltd., 2004.

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Joanne, Drinan, ed. Stream ecology & self-purification: An introduction. 2a ed. Lancaster, Pa: Technomic Pub. Co., 2001.

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Neel, Joe Kendall. A northern prairie stream. Grand Forks, N.D: University of North Dakota Press, 1985.

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Neel, Joe Kendall. A northern prairie stream. Grand Forks, N.D: University of North Dakota Press, 1985.

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Capítulos de libros sobre el tema "Stream ecology"

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Allan, J. David, Maria M. Castillo y Krista A. Capps. "Stream Microbial Ecology". En Stream Ecology, 225–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61286-3_8.

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Roy, Allison H., Michael J. Paul y Seth J. Wenger. "Urban Stream Ecology". En Agronomy Monographs, 341–52. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/agronmonogr55.c16.

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Allan, J. David. "Channels and flow". En Stream Ecology, 1–21. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_1.

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Allan, J. David. "Drift". En Stream Ecology, 221–37. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_10.

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Allan, J. David. "Lotic communities". En Stream Ecology, 239–57. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_11.

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

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Allan, J. David. "Nutrient dynamics". En Stream Ecology, 283–303. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_13.

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Allan, J. David. "Modification of running waters by humankind". En Stream Ecology, 305–42. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_14.

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Allan, J. David. "Streamwater chemistry". En Stream Ecology, 23–43. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_2.

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Allan, J. David. "Physical factors of importance to the biota". En Stream Ecology, 45–82. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0729-7_3.

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Actas de conferencias sobre el tema "Stream ecology"

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"Session: Special stream in advanced information technologies in ecology". En 2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS). IEEE, 2013. http://dx.doi.org/10.1109/idaacs.2013.6663032.

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Бадюкова, Е., E. Badyukova, Леонид Жиндарев, Leonid Zhindarev, Светлана Лукьянова, Svetlana Lukyanova, Г. Соловьева y G. Solov'eva. "ACCUMULATION-DEFLATIONARY PROCESSES ON MARINE SAND BARS COASTS OF THE SOUTHERN-EAST BALTIC". En Sea Coasts – Evolution ecology, economy. Academus Publishing, 2018. http://dx.doi.org/10.31519/conferencearticle_5b5ce3887ae4e9.49318189.

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Modern accumulative and deflation forms of a coastal eolian relief on the sea coast of Kuronian and Vistula Spits are considered. It is established that on coastal barriers there are at the same time processes of accretion and degradation of a dune ridge and leaned against it foredune. Alternation of stable and erosive sites of a dune ridge is revealed. The last has destruction signs as with sea (wave erosion), and from the land side where the whirls of a wind stream creating numerous deflation basins in dune ridge have great value.
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Favas, Paulo. "ASSESSMENT OF ARSENIC AND HEAVY METALS POLLUTION IN STREAM SEDIMENTS AFFECTED BY MINING USING GEOACCUMULATION INDEX". En 14th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b51/s20.011.

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Paller, Michael y Anna Sophia Knox. "Relative Effects of Local Disturbance and Climatic Change on Stream Ecology over 27 Years". En Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2015.

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Магрицкий, Д., D. Magrickiy, К. Можаева y K. Mozhaeva. "THE FEATURES OF MODERN CHANGES OF MORPHOLOGY AND WATER REGIME OF CHANNELS IN SULAK AND TEREK RIVER DELTAS". En Sea Coasts – Evolution ecology, economy. Academus Publishing, 2018. http://dx.doi.org/10.31519/conferencearticle_5b5ce3d0c4b352.39136673.

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On the basis of available hydrological data and results of expedition sounding works the detailed analysis of long-term changes of water levels in the main channels of Terek and Sulak river deltas, vertical and planned deformations of channels, parameters of channels and a river stream is made. The contribution to change of water levels in channels of the water discharges, channel processes, mouth lengthening and sea level fluctuations is quantitatively estimated. Differentiation of delta channels on character and factors of channel processes and changes of water levels is executed. Reliable tools (in the form of empirical dependences) for calculation of water levels on hydrological posts in the Terek and Sulak river deltas on the main factors are created. Received for results allow to optimize water economic actions in deltas of Terek and Sulak, to deepen our knowledge of mouth processes, especially at considerable change of factors of these processes.
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Bennett, Annastacia C., Senthil Murugapiran, Jeff R. Havig y Trinity L. Hamilton. "PHOTOTROPHIC COMMUNITY DISTRIBUTION AND MORPHOLOGY ALONG A GEOTHERMAL STREAM: INSIGHTS INTO BOTH MODERN AND ANCIENT MICROBIAL ECOLOGY". En GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-321105.

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Saibov, A. A., A. M. Umirzokov, F. M. Mahmudova, S. S. Saidullozoda y Kh Kh Khabibullozoda. "Analysis of theoretical frameworks of air stream motion and heat exchange with cylinders and their heads for air-cooled engines". En INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “ENERGY, ECOLOGY AND TECHNOLOGY IN AGRICULTURE” (EEA2022). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0129677.

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Gannon, J. P., David Kinner, Mark Lord y Trip Krenz. "ISOLATING THE IMPACTS OF A DISTURBED, EPHEMERAL GULLY ON WATER QUALITY AND STREAM ECOLOGY IN A HEADWATER CATCHMENT IN WESTERN NORTH CAROLINA". En 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273581.

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Popović, Filip J., Tanja B. Trakić, Mirjana M. Stojanović y Jovana M. Sekulić. "A new record of Dendrobaena Serbica karaman, 1973 (Clitellata; Lumbricidae) from Serbia". En 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.284p.

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The new records of the little-known Balkan endemic species Dendrobaena serbica Karaman, 1973 from Kopaonik Mountain, Serbia, are reported. So far, the species has been recorded at four localities: three localities in Serbia (Čakor, Kragujevac, Niš) and one locality in Montenegro (Prokletije Mountain). The first records were from 1973 from the locality in southwestern Serbia (Čakor, Prokletije). A review of the geographical distribution of D. serbica is presented. The confirmed geographical distribution of the species includes only the territories of the Republic of Serbia and Montenegro. Also, its distinction from the taxonomic similar congeners Dendrobaena illyrica (Cognetti de Martiis, 1906), Dendrobaena sasensis Šapkarev 1983 and Dendrobaena vejdovskyi (Černosvitov, 1935) is discussed. Further, the habitats of this species are restricted to the uppermost litter layer in forest soil and humid forests near stream banks. This paper summarized the knowledge of the taxonomy, ecology, and distribution of a little-known Balkan endemic species D. serbica.
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Gündel, Hande y Ayşe Kalaycı Önaç. "Sponge City Based on Blue – Green Urbanism". En 7th International Students Science Congress. Izmir International guest Students Association, 2023. http://dx.doi.org/10.52460/issc.2023.053.

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Blue-Green Infrastructure systems are essential and valuable solutions for urban and rural areas which are facing climate change problem. As climate change negatively affects vegetation systems, water systems, and life cycles, blue-green infrastructure solutions enhance the urban and rural landscape. The system combines the green and water networks and also manages stormwater. BGI develops a variety of urban ecological, economic, social functions, and also urban sustainability and liveability. In addition to these, the systems decrease the need of grey infrastructure and the negative impacts on urban ecology. BGI plays a specific role on development of stream and coastal systems, and also urban green areas. The system emphasizes the protection of hydrologic system and hydrodynamic processes, accordingly, water management systems which consist of rain gardens, green roofs, vertical greening systems, and permeable pavements are used. In the scope of the study, creation of Sponge City with Blue-Green Infrastructure systems and the construction processes are scrutinized. In connection with the idea, sponge city design tools are described.
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Informes sobre el tema "Stream ecology"

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Pokrzywinski, Kaytee, Kaitlin Volk, Taylor Rycroft, Susie Wood, Tim Davis y Jim Lazorchak. Aligning research and monitoring priorities for benthic cyanobacteria and cyanotoxins : a workshop summary. Engineer Research and Development Center (U.S.), agosto de 2021. http://dx.doi.org/10.21079/11681/41680.

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In 2018, the US Army Engineer Research and Development Center partnered with the US Army Corps of Engineers–Buffalo District, the US Environmental Protection Agency, Bowling Green State University, and the Cawthron Institute to host a workshop focused on benthic and sediment-associated cyanobacteria and cyanotoxins, particularly in the context of harmful algal blooms (HAB). Technical sessions on the ecology of benthic cyanobacteria in lakes and rivers; monitoring of cyanobacteria and cyanotoxins; detection of benthic and sediment-bound cyanotoxins; and the fate, transport, and health risks of cyanobacteria and their associated toxins were presented. Research summaries included the buoyancy and dispersal of benthic freshwater cyanobacteria mats, the fate and quantification of cyanotoxins in lake sediments, and spatial and temporal variation of toxins in streams. In addition, summaries of remote sensing methods, omic techniques, and field sampling techniques were presented. Critical research gaps identified from this workshop include (1) ecology of benthic cyanobacteria, (2) identity, fate, transport, and risk of cyanotoxins produced by benthic cyanobacteria, (3) standardized sampling and analysis protocols, and (4) increased technical cooperation between government, academia, industry, nonprofit organizations, and other stakeholders. Conclusions from this workshop can inform monitoring and management efforts for benthic cyanobacteria and their associated toxins.
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Crowley, David E., Dror Minz y Yitzhak Hadar. Shaping Plant Beneficial Rhizosphere Communities. United States Department of Agriculture, julio de 2013. http://dx.doi.org/10.32747/2013.7594387.bard.

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PGPR bacteria include taxonomically diverse bacterial species that function for improving plant mineral nutrition, stress tolerance, and disease suppression. A number of PGPR are being developed and commercialized as soil and seed inoculants, but to date, their interactions with resident bacterial populations are still poorly understood, and-almost nothing is known about the effects of soil management practices on their population size and activities. To this end, the original objectives of this research project were: 1) To examine microbial community interactions with plant-growth-promoting rhizobacteria (PGPR) and their plant hosts. 2) To explore the factors that affect PGPR population size and activity on plant root surfaces. In our original proposal, we initially prqposed the use oflow-resolution methods mainly involving the use of PCR-DGGE and PLFA profiles of community structure. However, early in the project we recognized that the methods for studying soil microbial communities were undergoing an exponential leap forward to much more high resolution methods using high-throughput sequencing. The application of these methods for studies on rhizosphere ecology thus became a central theme in these research project. Other related research by the US team focused on identifying PGPR bacterial strains and examining their effective population si~es that are required to enhance plant growth and on developing a simulation model that examines the process of root colonization. As summarized in the following report, we characterized the rhizosphere microbiome of four host plant species to determine the impact of the host (host signature effect) on resident versus active communities. Results of our studies showed a distinct plant host specific signature among wheat, maize, tomato and cucumber, based on the following three parameters: (I) each plant promoted the activity of a unique suite of soil bacterial populations; (2) significant variations were observed in the number and the degree of dominance of active populations; and (3)the level of contribution of active (rRNA-based) populations to the resident (DNA-based) community profiles. In the rhizoplane of all four plants a significant reduction of diversity was observed, relative to the bulk soil. Moreover, an increase in DNA-RNA correspondence indicated higher representation of active bacterial populations in the residing rhizoplane community. This research demonstrates that the host plant determines the bacterial community composition in its immediate vicinity, especially with respect to the active populations. Based on the studies from the US team, we suggest that the effective population size PGPR should be maintained at approximately 105 cells per gram of rhizosphere soil in the zone of elongation to obtain plant growth promotion effects, but emphasize that it is critical to also consider differences in the activity based on DNA-RNA correspondence. The results ofthis research provide fundamental new insight into the composition ofthe bacterial communities associated with plant roots, and the factors that affect their abundance and activity on root surfaces. Virtually all PGPR are multifunctional and may be expected to have diverse levels of activity with respect to production of plant growth hormones (regulation of root growth and architecture), suppression of stress ethylene (increased tolerance to drought and salinity), production of siderophores and antibiotics (disease suppression), and solubilization of phosphorus. The application of transcriptome methods pioneered in our research will ultimately lead to better understanding of how management practices such as use of compost and soil inoculants can be used to improve plant yields, stress tolerance, and disease resistance. As we look to the future, the use of metagenomic techniques combined with quantitative methods including microarrays, and quantitative peR methods that target specific genes should allow us to better classify, monitor, and manage the plant rhizosphere to improve crop yields in agricultural ecosystems. In addition, expression of several genes in rhizospheres of both cucumber and whet roots were identified, including mostly housekeeping genes. Denitrification, chemotaxis and motility genes were preferentially expressed in wheat while in cucumber roots bacterial genes involved in catalase, a large set of polysaccharide degradation and assimilatory sulfate reduction genes were preferentially expressed.
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Evans, Julie, Kendra Sikes y Jamie Ratchford. Vegetation classification at Lake Mead National Recreation Area, Mojave National Preserve, Castle Mountains National Monument, and Death Valley National Park: Final report (Revised with Cost Estimate). National Park Service, octubre de 2020. http://dx.doi.org/10.36967/nrr-2279201.

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Vegetation inventory and mapping is a process to document the composition, distribution and abundance of vegetation types across the landscape. The National Park Service’s (NPS) Inventory and Monitoring (I&M) program has determined vegetation inventory and mapping to be an important resource for parks; it is one of 12 baseline inventories of natural resources to be completed for all 270 national parks within the NPS I&M program. The Mojave Desert Network Inventory & Monitoring (MOJN I&M) began its process of vegetation inventory in 2009 for four park units as follows: Lake Mead National Recreation Area (LAKE), Mojave National Preserve (MOJA), Castle Mountains National Monument (CAMO), and Death Valley National Park (DEVA). Mapping is a multi-step and multi-year process involving skills and interactions of several parties, including NPS, with a field ecology team, a classification team, and a mapping team. This process allows for compiling existing vegetation data, collecting new data to fill in gaps, and analyzing the data to develop a classification that then informs the mapping. The final products of this process include a vegetation classification, ecological descriptions and field keys of the vegetation types, and geospatial vegetation maps based on the classification. In this report, we present the narrative and results of the sampling and classification effort. In three other associated reports (Evens et al. 2020a, 2020b, 2020c) are the ecological descriptions and field keys. The resulting products of the vegetation mapping efforts are, or will be, presented in separate reports: mapping at LAKE was completed in 2016, mapping at MOJA and CAMO will be completed in 2020, and mapping at DEVA will occur in 2021. The California Native Plant Society (CNPS) and NatureServe, the classification team, have completed the vegetation classification for these four park units, with field keys and descriptions of the vegetation types developed at the alliance level per the U.S. National Vegetation Classification (USNVC). We have compiled approximately 9,000 existing and new vegetation data records into digital databases in Microsoft Access. The resulting classification and descriptions include approximately 105 alliances and landform types, and over 240 associations. CNPS also has assisted the mapping teams during map reconnaissance visits, follow-up on interpreting vegetation patterns, and general support for the geospatial vegetation maps being produced. A variety of alliances and associations occur in the four park units. Per park, the classification represents approximately 50 alliances at LAKE, 65 at MOJA and CAMO, and 85 at DEVA. Several riparian alliances or associations that are somewhat rare (ranked globally as G3) include shrublands of Pluchea sericea, meadow associations with Distichlis spicata and Juncus cooperi, and woodland associations of Salix laevigata and Prosopis pubescens along playas, streams, and springs. Other rare to somewhat rare types (G2 to G3) include shrubland stands with Eriogonum heermannii, Buddleja utahensis, Mortonia utahensis, and Salvia funerea on rocky calcareous slopes that occur sporadically in LAKE to MOJA and DEVA. Types that are globally rare (G1) include the associations of Swallenia alexandrae on sand dunes and Hecastocleis shockleyi on rocky calcareous slopes in DEVA. Two USNVC vegetation groups hold the highest number of alliances: 1) Warm Semi-Desert Shrub & Herb Dry Wash & Colluvial Slope Group (G541) has nine alliances, and 2) Mojave Mid-Elevation Mixed Desert Scrub Group (G296) has thirteen alliances. These two groups contribute significantly to the diversity of vegetation along alluvial washes and mid-elevation transition zones.
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