Gotowe bibliografie tematyczne / Dune lakes

Gotowa bibliografia na temat „Dune lakes”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 19 lutego 2023

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Artykuły w czasopismach na temat "Dune lakes"

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Colgan, Patrick M., William H. Amidon i Sara A. Thurkettle. "Inland dunes on the abandoned bed of Glacial Lake Chicago indicate eolian activity during the Pleistocene-Holocene transition, southwestern Michigan, USA". Quaternary Research 87, nr 1 (styczeń 2017): 66–81. http://dx.doi.org/10.1017/qua.2016.13.

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AbstractInland dune fields have recently emerged as a source of data for reconstructing paleoenvironments and climate in the western Great Lakes region of North America during the Pleistocene-Holocene transition. We employ optically stimulated luminescence (OSL) methods, radiocarbon ages, soils, and landform relationships to determine the age of inland dunes in Ottawa County, Michigan. These dunes rest on the abandoned bed of Glacial Lake Chicago, which is thought to have been exposed after ~13.6 ka. OSL analyses from two inland dunes yield ages ranging from 13.3±1.1 to 11.6±0.9 ka (uncertainty=2σ). Fine sand in the parabolic dunes suggests deflation of exposed glaciolacustrine nearshore sand by northwesterly and westerly winds. These new data add to a growing number of studies that demonstrate widespread eolian activity in the western Great Lakes region during the Pleistocene-Holocene transition. OSL ages from dune fields in the western Great Lakes indicate peak eolian activity and dune stabilization occurred during or following the Younger Dryas and Preboreal events. Northwesterly and westerly winds suggest the limited effect of hypothesized easterly anticyclonic winds during the Pleistocene-Holocene transition. Rapidly changing climate and newly deglaciated surfaces provided an ideal environment for dune formation.
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Timms, B. V. "Study of coastal freshwater lakes in southern New South Wales". Marine and Freshwater Research 48, nr 3 (1997): 249. http://dx.doi.org/10.1071/mf96049.

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There are few freshwater lakes associated with coastal dunes in southern New South Wales (NSW). Lake Nargal near Narooma, Bondi Lake near Bega, and a small lagoon near Pambula have little in common limnologically with coastal dune lakes of northern NSW and southern Queensland. They differ in mode of origin, are less dominated by NaCl, are less acidic, are more speciose, have few characteristic dune-lake indicator species, and moreover contain certain southern species. However, a re-examination of data for Lakes Windermere and McKenzie further north at Jervis Bay suggest that these are classic dune-contact lakes rather similar to those in northern NSW. Differences and similarities are largely influenced by the extent and therefore the hydrological influence of the contextural coastal sand mass and by biogeography.
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Timms, BV. "Reconnaissance limnology of some coastal dune lakes of Cape York Peninsula, Queensland". Marine and Freshwater Research 37, nr 2 (1986): 167. http://dx.doi.org/10.1071/mf9860167.

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All nine lakes studied are small (mean area 32 ha), shallow (< 5 m deep), watertable exposures in thin dunes overlying laterite or sandstone. Their water is fresh (mean salinity 52 mg I-1), acid (mean pH 4.8) and dominated by Na+ and Cl-, but with appreciable amounts of Ca2+, Mg2+ and HCO3-. Almost all macrophytes, littoral invertebrates, fish and limnetic zooplankters are common tropical species. A few species are shared with dune lakes in southern Australia and even fewer are endemic. Hence, these tropical dune lakes are different from those in temperate and subtropical eastern Australia.
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Martini, Peter. "Coastal dunes of Ontario: distribution and geomorphology". Géographie physique et Quaternaire 35, nr 2 (1.02.2011): 219–29. http://dx.doi.org/10.7202/1000438ar.

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Transverse dunes (fore-dunes), parabolic dunes, rare cliff-top dunes, and blowouts are found in Ontario. Many of these coastal dunes are land-locked on abandoned sand plains of partially drained early-post glacial lakes and seas. Others are part of coastal systems found at different stages of evolution along the Great Lakes. An idealized coastal system, as is for great part well developed at Wasaga Beach, includes the following elements: a few metres high foredunes partially deflated and breached by wave washover; low, long, narrow, marshy zones landward from the foredunes: the "pannes"; a wide sequence of numerous beach ridges capped by small (2 m high) stabilized foredunes, and separated by long shallow swales covered by water for several months of the year; intensely deflated transverse dunes which record raised coastlines of old lakes; and finally, high (up to 25 m) nested parabolic dunes showing progressive landward increase in height. These high dunes have developed over sandy, gravelly bars of early Holocene lakes, and have prograded for a short distance over lagoons. Most of the dune systems found along the Great Lakes have developed in the last 3-5000 years. Some of them have been intensely affected by man during the last two centuries, particularly by logging, agriculture, and recreational activities. Some dune fields have been completely flattened, others on the contrary have been reactivated by deforestation, and new dunes have formed and have migrated landward onto forests and cultivated fields.
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Blumer, Bradley E., Alan F. Arbogast i Steven L. Forman. "The OSL chronology of eolian sand deposition in a perched dune field along the northwestern shore of Lower Michigan". Quaternary Research 77, nr 3 (maj 2012): 445–55. http://dx.doi.org/10.1016/j.yqres.2012.01.006.

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Extensive coastal dunes occur in the Great Lakes region of North America, including northwestern Michigan where some are perched on high (~ 100 m) bluffs. This study focuses on such a system at Arcadia Dunes and is the first to systematically generate optical ages from stratigraphic sections containing buried soils. Dune growth began ca. 4.5 ka during the Nipissing high lake stand and continued episodically thereafter, with periods of increased sand supply at ca. 3.5 ka and ca. 1.7 ka. The most volumetrically dominant phase of dune growth began ca. 1.0 ka and continued intermittently for about 500 years. It may have begun due to the combined effects of a high lake phase, potential changes in lake hydrodynamics with final isostatic separation of Lake Superior from Lakes Michigan and Huron, and increased drought and hydrologic variability associated with the Medieval Warm Period. Thus, this latest eolian phase likely reflects multiple processes associated with Great Lakes water level and climate variability that may also explain older eolian depositional events. Comparison of Arcadia ages and calendar corrected 14C ages from previous studies indicate broad chronological agreement between events at all sites, although it appears that dune growth began later at Arcadia.
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Peralta Pelaez, Luis A., Patricia Moreno-Casasola i Hugo López Rosas. "Hydrophyte composition of dune lakes and its relationship to land-use and water physicochemistry in Veracruz, Mexico". Marine and Freshwater Research 65, nr 4 (2014): 312. http://dx.doi.org/10.1071/mf12295.

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Coastal dunes include several habitats, including dune lakes. These habitats are valuable environmental assets. We analysed the impact of the surrounding land use on plant species composition, vegetation structure and water quality of 15 dune lakes in the coast of Veracruz in the Gulf of Mexico. The physical and chemical characteristics were determined for water during both the dry and rainy seasons, and vegetation was sampled once. Ammonium, nitrate, orthophosphate and total phosphorus varied between seasons and among lakes. Multivariate analysis revealed a gradient from lakes in a good state (water and wetland vegetation) to degraded lakes. These lakes fall into two groups: the first one has five lakes with a higher nutrient content, and surrounded by land where livestock is pastured and sugarcane is grown. The vegetation of these lakes consists of a combination of aquatic plants and flood-tolerant grasses introduced to feed cattle (Cynodon dactylon, Pennisetum purpureum, Setaria geniculata). Oligotrophic and mildly eutrophic lakes are characterised by little human activity, and aquatic species predominate (Cabomba palaeformis, Nymphaea ampla, Acrostichum aureum). Rural activities such as sugarcane cultivation and cattle rearing are likely the main factors causing changes in water enrichment and affecting the composition and structure of wetland vegetation. Management measures should be implemented to recover these areas and prevent further deterioration.
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Peralta Peláez, Luis Alberto, i Patricia Moreno Casasola. "Composición florística y diversidad de la vegetación de humedales en los lagos interdunarios de Veracruz". Botanical Sciences 85 (20.05.2019): 89. http://dx.doi.org/10.17129/botsci.2307.

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Dune lakes of the coast of Veracruz, Mexico, are shallow freshwater lakes with suitable conditions for the establishment of herbaceous and arboreal wetlands. Most of the vegetation of the surrounding dunes has been transformed into pastures for grazing lands and sugar cane plantations. The objective of this paper is to describe and compare structure, composition and diversity of the wetland vegetation of 15 dune lakes in the rural area. Environmental parameters (pH, salinity, size, depth and number of dry months) were taken into account. Plant diversity of these lakes comprise 46 families (27 strictly aquatic) and 82 species, among them <em>Sagittaria lancifolia, Pontederia sagittata, Ceratophyllum demersum.</em> Species richness fl uctuated between 5 and 33 species. The classifi cation resulted in nine fl oristic wetland groups, three of them with grass species from the surrounding areas <em>(Cynodon dactylon, Echinochloa pyramidalis).</em> Ordination separated lakes based on pH and number of dry months. Management plans should be developed together with the owners to maintain both the use of these lakes and the composition and structure of their wetlands.
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Niu, Zhenmin, Nai’ang Wang, Nan Meng, Jiang Liu, Xueran Liang, Hongyi Cheng, Penghui Wen, Xinran Yu, Wenjia Zhang i Xiaoyan Liang. "Contribution of Lake-Dune Patterning to the Dune Height of Mega-Dunes in the Badain Jaran Sand Sea, Northern China". Remote Sensing 13, nr 23 (3.12.2021): 4915. http://dx.doi.org/10.3390/rs13234915.

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Mega-dunes in the lake group area of the Badain Jaran Sand Sea, China, are generally taller than dunes in the non-lake group area. This spatial distribution of dune heights may provide a new perspective on the controversy regarding the dunes’ formation mechanism. In this study, we calculated the relative heights and slopes of individual dunes based on a digital elevation model, and we confirmed the height distribution of abnormally tall dunes in the lake group area of the sand sea. It was also found that slopes of more than 10° in the lake group area are more common than those in the non-lake group area. Based on meteorological observations, coupled with the measurement of water content in the sand layers, we propose a conceptual model demonstrating that moisture exchange between the lakes and soil via non-rainfall water will humidify dune slopes and form a more favorable accumulation environment for aeolian sand, thus increasing dune heights. Although long-term observations are yet to be carried out, the present study can be used as evidence for understanding the basis of dune formation in the lake group area and assessing groundwater utilization in deserts.
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Liu, Zhengyao, Zhibao Dong i Xujia Cui. "Morphometry of lunette dunes in the Tirari Desert, South Australia". Open Geosciences 10, nr 1 (14.09.2018): 452–60. http://dx.doi.org/10.1515/geo-2018-0035.

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Abstract Morphometry and formation processes are key research problems in the study of aeolian sandy landforms. Based on morphometric parameters inferred from satellite images and the calculation of the drift potential (DP), we examined general characteristics of lunette dunes in the Tirari Desert, South Australia, along with their morphometry and formation processes to determine how this landform type initially formed and its relationship to surrounding linear dune distribution. Results show that the morphometric parameters of lunette dunes and connective lake systems exhibit moderate correlations. It suggests that the morphology of these dunes is controlled by the lakes. Spatially, the lunette dunes present regular arrangement, and the strike of their alignment are approximately in accordance with the linear dunes. The calculated DP implies that the lunette dunes developed under a low-wind-energy environment, which is a wind regime similar to that required for the formation of the surrounding linear dunes. Even though, the resultant DP demonstrates that the summer wind should be responsible for the growth of the lunette dunes. However, accompanied with the repeated drying of lakes and even its disappearance during the dune development process, it not only contributes to the development of lunette dunes but also promotes their transformation to linear dunes.
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Arthington, AH, HB Burton, RW Williams i PM Outridge. "Ecology of humic and non-humic dune lakes, Fraser Island, with emphasis on the effects of sand infilling in Lake Wabby". Marine and Freshwater Research 37, nr 6 (1986): 743. http://dx.doi.org/10.1071/mf9860743.

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Aspects of physicochemical limnology and the zooplankton, littoral invertebrates and fish of dune lakes on Fraser Island are described and compared. The comparisons highlight differences between perched, humic lakes and the non-humic Lake Wabby, a water-table window with some morphometric and biological features typical of dune barrage lakes. Lake Wabby has been partially infilled by a mobile sand dune moving mainly in a north-westerly direction across the northern end of the lake. The maximum rate of dune advance estimated from aerial photos was 5.03 m year-1, between 1948 and 1958. Sand infilling between 1975 and 1984 altered the morphometry and substrate characteristics of the lake's eastern region and reduced maximum depth from 13.0 to 11.5 m and volume by 43%. The number of benthic invertebrates was reduced from 14 taxa in 1975 to six taxa in 1984; there was also a significant decrease in abundance of benthic Chironomini during this period (ANOVA, P < 0.05). In both years, an undescribed species of Conochironomus was the most abundant benthic invertebrate in Lake Wabby (250-700 individuals m-2). A new genus of Chironomini (near Paralauter borniella) was discovered. Lake Wabby supported 11 species of fish in 1975 and 1984, but the perched lakes had only one or two species. The five most abundant species in Lake Wabby in 1975 showed evidence of partitioning of food resources, of which the main components were benthic invertebrates and filamentous algae. Allochthonous food resources were not important in fish diets. The possible long-term effects of sand infilling on food resources, fish diets and the composition of the zooplankton in Lake Wabby are discussed.
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Rozprawy doktorskie na temat "Dune lakes"

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Domínguez, Acosta Miguel. "The Pluvial Lake Palomas-Samalayuca Dune systems". To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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Hadwen, Wade Lynton, i w. hadwen@mailbox gu edu au. "Effects of Nutrient Additions on Dune Lakes on Fraser Island, Australia". Griffith University. Australian School of Environmental Studies, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030304.091718.

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Given the rapidly increasing visitation levels to Fraser Island, there is increasing concern that tourist activities may threaten the long-term ecological health of the region's unique dune lakes. This project aimed to investigate the consequences of tourist use of Fraser Island's dune lakes and to develop appropriate monitoring tools and management objectives in light of the projected increases in visitation levels in the foreseeable future. The initial phase of this research aimed to identify the relative importance of some of the most popular dune lakes on the island as key destinations for tourists. Tourist surveys, in conjunction with the development of a Tourist Pressure Index (TPI), which quantifies logistic, social and natural variables, identified Lakes McKenzie, Allom and Birrabeen as the lakes most at risk from excessive tourist use. In addition, analyses of water quality in 15 lakes on Fraser Island aimed to determine the current trophic status of dune lakes on Fraser Island and the ecological implications of tourist use of these systems. Detailed comparisons of nutrient and chlorophyll a concentrations in five popular dune lakes in February 1990 (data from Arthington et al. 1990) and February 1999 suggested that productivity has increased significantly in the past decade. More detailed examinations of nutrient and algal variables in five popular perched dune lakes revealed that while ambient nutrient and phytoplankton chlorophyll a concentrations remained relatively stable, periphyton chlorophyll a concentrations increased over the course of the 1999-2000 summer in most lakes. Significantly, these increases were found only in heavily visited (disturbed) sites in the clear lakes examined (McKenzie and Birrabeen). In these lakes, where algal growth is likely to be only limited by nutrient availability, tourist nutrient additions may stimulate excessive periphyton production. Experimental algal bioassays identified that phytoplankton and to a lesser degree periphyton growth was stimulated by nutrient additions in all five perched dune lakes. However, the degree to which growth was stimulated was both lake and nutrient (nitrogen versus phosphorus versus nitrogen + phosphorus) dependent, highlighting the variable nature of systems within a relatively small geographic range. Since periphyton biomass was higher in heavily visited areas of lakes and was likely to be stimulated by nutrient additions by tourists, stable isotope analyses of littoral zone food webs were conducted to quantify the percent contribution of periphyton to consumer diets. There was a trend towards higher periphyton contributions in systems identified as key tourist locations (on the basis of their TPI scores) and this indicates that increasing visitation may increase the contribution of periphyton to littoral zone food webs, both via increases in the quantity and quality of periphyton as a food resource. To further explore the contribution of periphyton in littoral zone food webs of heavily visited lakes, a 15N-tracer addition experiment was conducted to establish the fate of nutrient additions within the littoral zone. Nutrients were added in quantities that mimicked those likely from tourists, to enable a realistic appraisal of the fate of tourist additions. As expected, periphyton rapidly assimilated the added 15N-tracer and was found to be the first and most significant sink for nutrients entering the littoral zone. Finally, the results from this research were used to develop a conceptual model of nutrient enrichment for perched dune lakes on Fraser Island. The model indicates that although nutrient additions from tourists may lead to undesirable increases in periphyton biomass, the degree to which this is deemed to be a detrimental ecological outcome is likely to be mediated by water level fluctuations and the consumptive capacity of grazers. Given that excessive periphyton growth is likely to be seen as negative impact of tourism, regular periphyton monitoring (biomass and percent contribution to littoral zone food webs) should be built into an updated monitoring program for this series of dune lakes. Whilst the implementation of periphyton monitoring is likely to enable the early detection of deleterious impacts of excessive tourist use, it is likely that the long-term conservation of the region will, in the future, require the implementation of strict visitation level guidelines, to ensure that the irreversible consequences of long term additions of nutrients are ameliorated.
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O'Malley, Paul W. "Understanding Formation and Evolution of Dune Fields by Spatial Mapping and Analysis: Upper Muskegon River Valley, Michigan". Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1557841176226706.

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Zedeño, M. Nieves, Richard W. Stoffle, Fabio Pittaluga, Hefley Genevieve Dewey, R. Christopher Basaldú i Maria Porter. "Traditional Ojibway Resources in the Western Great Lakes". Bureau of Applied Research in Applied Anthropology, 2001. http://hdl.handle.net/10150/292680.

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This was an applied ethnographic study of natural and cultural resources of contemporary significance for American Ojibway' tribes and Canadian Ojibway First Nations that are or were once present within or in the immediate vicinity of four National Park Service (NPS) units in the Midwest Region: Sleeping Bear Dunes National Lakeshore (SLBE), Michigan; Pictured Rocks National Lakeshore (PIRO), Michigan; Apostle Islands National Lakeshore (APIS), Wisconsin; and Voyageurs National Park (VOYA), Minnesota. The main objective of this study, according to the Scope of Work (SOW) of 1996, was to develop a documented basis of knowledge regarding historic and current use of resources by culturally affiliated Native American tribes that should help park managers anticipate Native American resource use issues that may confront them in the future and thus be better prepared to deal with them in an informed and culturally sensitive manner. The study also was to provide recommendations regarding preservation, monitoring, mitigation, interpretation, and use access issues. The research was designed to provide a historical and ethnographic overview and assessment of Native American, Southwestern Ojibway in particular, land and resource use as it pertains to the region where the parks are located, and to each park unit. This study also provided an inventory of ethnographic resources known to have been significant for culturally affiliated Southwestern Ojibway tribes at different points in time.
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Rowland, Jennifer M. "Restoration ecology of Cirsium pitcheri along Lake Huron sand dunes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ42096.pdf.

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Baca, Kira J. "Environmental Impacts on the Development and Dune Activity of Oxbow Lake along the Southwest Coast of Lake Michigan at Saugatuck, Michigan USA". University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365161018.

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Clack, Aaron G. "The Lesser Slave Lake dune ridge barrier complex, north central Alberta, depositional processes, paleogeography, and paleoclimate". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0005/MQ34950.pdf.

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Duffy, Angela. "Genetic structuring among naturally isolated dune lake populations : a microcosm of evolutionary processes on oceanic islands". Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16491/1/Angela_Duffy_Thesis.pdf.

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Oceanic islands have been used as model systems for studies of evolution and speciation as the range of island sizes coupled with their known geological chronosequence make them ideal systems for the study of spatial and temporal variations in species diversity and distributions. These processes also occur on continental islands and mainland habitats but features of oceanic islands, notably their clearly delimited boundaries, natural isolation and simple geological composition make them more amenable to study. The perched dune lakes of Fraser Island, Australia share many of the properties of oceanic islands. The naturally isolated formation of the perched lakes, clearly delimited boundaries of the freshwater habitat and phase difference compared to the surrounding, terrestrial environment have significant implications for the biota these lakes support. Inhabitants of the perched dune lakes consist of the aquatic and semi-aquatic descendents of colonisers that were able to traverse a land barrier and survive in the oligotrophic, acidic waters over subsequent generations. Barriers to ongoing gene flow among lake populations, are however likely to be different for species with different life history characteristics. I therefore sought to assess the effects of three different life history characteristics on post-colonisation interpopulation gene flow. A representative species was selected to represent one of each of the following life history characteristics: * Aquatic species confined to lake for entire life cycle - freshwater shrimp Caridina indistincta. * Semi-aquatic species capable of terrestrial dispersal - freshwater turtle Emydura krefftii. * Semi-aquatic species capable of aerial dispersal - odonate Orthetrum Boumiera. 137-250 individuals were sampled per species across six lakes separated by 1-6km. Regions of the mitochondrial genome were targeted and molecular screening methods developed and employed to assess the relative levels of post-colonisation gene flow among lake populations. Parsimony analysis of the 25 unique haplotypes identified in the species with no apparent inter-lake dispersal mechanism, the freshwater shrimp Caridina indistincta, demonstrated that there was no sharing of derived haplotypes among lake populations. Star shaped genealogies were identified in four lake populations indicative of a population expansion and mismatch distribution analysis confirmed a recent population expansion estimated to have occurred no more than 200,000 years ago. This demonstrates that each of the perched dune lakes was colonised by C.indistincta soon after their inception but that no ongoing gene flow among lake populations has occurred. The population genetic structure of the species assessed which is capable of terrestrial dispersal suggests that although this species of freshwater turtle, Emydura krefftii, is capable of overland dispersal, gene flow among lake populations is limited. Even at the small spatial scale examined in this study, E.krefftii populations displayed a pattern of isolation by distance (r=0.854, p<0.03). Nested clade analysis also suggested a pattern of restricted gene flow with some long distance dispersal in recent times with long distance dispersal and a possible range expansion occurring historically. The species examined in this study that displayed the most extensive gene flow among lake populations was the dragonfly Orthetrum boumiera. No relationship was found between genetic and geographic distance (r= -0.0852, p>0.05) and nested clade analysis could not identify a geographical association among haplotypes, indicative of panmixia. While larval life stages of this species are fully aquatic, the winged adult stages of this species appear to be connecting seemingly isolated lake populations, at least at the spatial scale examined here. The results of this study have demonstrated that these perched dune lakes provide 'island like' models for recent biogeographic processes. The pattern of colonisation and subsequent diversification identified in these populations takes the form of insitu 'genetic radiations' with those populations that are isolated forming monophyletic clades endemic to a single lake. The genetic diversity and endemism identified in this study has occurred over much smaller temporal (<500,000 years) and spatial (<6.5km) scales than in studies of oceanic island fauna. However, the mode of formation of the perched dune lakes and the implications that their natural isolation and abiotic genesis have for the evolution of colonisers of these unique habitats has resulted in them being analogous to true oceanic islands.
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Duffy, Angela. "Genetic structuring among naturally isolated dune lake populations : a microcosm of evolutionary processes on oceanic islands". Queensland University of Technology, 2007. http://eprints.qut.edu.au/16491/.

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Oceanic islands have been used as model systems for studies of evolution and speciation as the range of island sizes coupled with their known geological chronosequence make them ideal systems for the study of spatial and temporal variations in species diversity and distributions. These processes also occur on continental islands and mainland habitats but features of oceanic islands, notably their clearly delimited boundaries, natural isolation and simple geological composition make them more amenable to study. The perched dune lakes of Fraser Island, Australia share many of the properties of oceanic islands. The naturally isolated formation of the perched lakes, clearly delimited boundaries of the freshwater habitat and phase difference compared to the surrounding, terrestrial environment have significant implications for the biota these lakes support. Inhabitants of the perched dune lakes consist of the aquatic and semi-aquatic descendents of colonisers that were able to traverse a land barrier and survive in the oligotrophic, acidic waters over subsequent generations. Barriers to ongoing gene flow among lake populations, are however likely to be different for species with different life history characteristics. I therefore sought to assess the effects of three different life history characteristics on post-colonisation interpopulation gene flow. A representative species was selected to represent one of each of the following life history characteristics: * Aquatic species confined to lake for entire life cycle - freshwater shrimp Caridina indistincta. * Semi-aquatic species capable of terrestrial dispersal - freshwater turtle Emydura krefftii. * Semi-aquatic species capable of aerial dispersal - odonate Orthetrum Boumiera. 137-250 individuals were sampled per species across six lakes separated by 1-6km. Regions of the mitochondrial genome were targeted and molecular screening methods developed and employed to assess the relative levels of post-colonisation gene flow among lake populations. Parsimony analysis of the 25 unique haplotypes identified in the species with no apparent inter-lake dispersal mechanism, the freshwater shrimp Caridina indistincta, demonstrated that there was no sharing of derived haplotypes among lake populations. Star shaped genealogies were identified in four lake populations indicative of a population expansion and mismatch distribution analysis confirmed a recent population expansion estimated to have occurred no more than 200,000 years ago. This demonstrates that each of the perched dune lakes was colonised by C.indistincta soon after their inception but that no ongoing gene flow among lake populations has occurred. The population genetic structure of the species assessed which is capable of terrestrial dispersal suggests that although this species of freshwater turtle, Emydura krefftii, is capable of overland dispersal, gene flow among lake populations is limited. Even at the small spatial scale examined in this study, E.krefftii populations displayed a pattern of isolation by distance (r=0.854, p<0.03). Nested clade analysis also suggested a pattern of restricted gene flow with some long distance dispersal in recent times with long distance dispersal and a possible range expansion occurring historically. The species examined in this study that displayed the most extensive gene flow among lake populations was the dragonfly Orthetrum boumiera. No relationship was found between genetic and geographic distance (r= -0.0852, p>0.05) and nested clade analysis could not identify a geographical association among haplotypes, indicative of panmixia. While larval life stages of this species are fully aquatic, the winged adult stages of this species appear to be connecting seemingly isolated lake populations, at least at the spatial scale examined here. The results of this study have demonstrated that these perched dune lakes provide 'island like' models for recent biogeographic processes. The pattern of colonisation and subsequent diversification identified in these populations takes the form of insitu 'genetic radiations' with those populations that are isolated forming monophyletic clades endemic to a single lake. The genetic diversity and endemism identified in this study has occurred over much smaller temporal (<500,000 years) and spatial (<6.5km) scales than in studies of oceanic island fauna. However, the mode of formation of the perched dune lakes and the implications that their natural isolation and abiotic genesis have for the evolution of colonisers of these unique habitats has resulted in them being analogous to true oceanic islands.
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Chen, Hua. "Seed dormancy of Pitcher's thistle, a threatened species of Lake Huron sand dunes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0009/MQ28548.pdf.

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Książki na temat "Dune lakes"

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J, Elfont C., red. Sand dunes of the Great Lakes. Chelsea, MI: Sleeping Bear Press, 1997.

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Coastline and dune evolution along the Great Lakes. Boulder, Colorado: The Geological Society of America, 2014.

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F, Arbogast Alan, i Monaghan G. William, red. The geoarchaeology of Lake Michigan coastal dunes. East Lansing: Michigan State University Press, 2012.

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Sinclair, Kirk A. Moses Lake Dunes Wastewater Treatment Plant, Class II groundwater inspection. [Olympia, Wash.]: Washington State Dept. of Ecology, 1999.

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Golding, Steven. Moses Lake (Dunes) Wastewater Treatment Plant, Class II wastewater inspection, April 27-29, 1998. [Olympia, Wash.]: Washington State Dept. of Ecology, 1999.

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United States. Congress. House. Committee on Interior and Insular Affairs. Modifying the boundaries of the Indiana Dunes National Lake-Shore, and for other purposes: Report (to accompany H.R. 3209). [Washington, D.C.?: U.S. G.P.O., 1990.

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United States. Congress. House. Committee on Interior and Insular Affairs. Modifying the boundaries of the Indiana Dunes National Lake-Shore, and for other purposes: Report (to accompany H.R. 3209). [Washington, D.C.?: U.S. G.P.O., 1990.

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United States. Congress. House. Committee on Interior and Insular Affairs. Modifying the boundaries of the Indiana Dunes National Lake-Shore, and for other purposes: Report (to accompany H.R. 3209). [Washington, D.C.?: U.S. G.P.O., 1990.

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Altizer, William E. Small-scale archeological inventories of ROU tracts and other park properties 2009, Lake and Porter Counties, Indiana Dunes National Lakeshore. Lincoln, Neb: National Park Service, Midwest Archeological Center, 2010.

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Journey into summer: A naturalist's record of a 19,000-mile journey through the North American summer. New York: St. Martin's Press, 1990.

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Części książek na temat "Dune lakes"

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Timms, B. V. "The Coastal Dune Lakes of Eastern Australia". W Limnology in Australia, 421–32. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4820-4_26.

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Fukuhara, Haruo, Fumiko Nemoto, Yoko Takeuchi i Nobushige Toda. "Nitrate dynamics in a reed belt of a shallow sand dune lake in Japan: Analysis of nitrate retention using stable nitrogen isotope ratios". W Shallow Lakes in a Changing World, 49–58. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6399-2_5.

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McDowall, R. M. "Pattern and Process in the Distributions of Non-diadromous Species 3: The Dune Lakes Galaxias". W New Zealand Freshwater Fishes, 297–302. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9271-7_13.

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Hansen, Edward, Suzanne DeVries-Zimmerman, Robin Davidson-Arnott, Deanna van Dijk, Brian Bodenbender, Zoran Kilibarda, Todd Thompson i Brian Yurk. "Dunes of the Laurentian Great Lakes". W Dunes of the World, 65–120. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40498-7_3.

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Princy, J. R., M. Ramesh, J. Jyothi, P. S. Swathy Krishna i L. Sheela Nair. "Non-monsoonal Coastal Erosion Due to the Tropical Cyclone (OCKHI) and Its Impacts Along Thiruvananthapuram Coast, Southwest Coast of India – A Geospatial Approach". W Coasts, Estuaries and Lakes, 471–86. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21644-2_29.

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Dong, Zhibao. "Mega-Dune—Lake System in the Badain Jaran Sand Sea". W Sand Dunes of the Northern Hemisphere, 127–51. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003125426-12.

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Baines, P. G. "Momentum exchange due to internal waves and wakes generated by flow past topography in the atmosphere and lakes". W Physical Processes in Lakes and Oceans, 285–94. Washington, D. C.: American Geophysical Union, 1998. http://dx.doi.org/10.1029/ce054p0285.

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Rankenhohn, Florian, Tido Strauß i Paul Wermter. "Dianchi Shallow Lake Management". W Terrestrial Environmental Sciences, 69–102. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80234-9_3.

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AbstractLake Dianchi in the Chinese province Yunnan is a shallow lake suffering from algae blooms for years due to high pollution. We conducted a thorough survey of the water quality of the northern part of the lake called Caohai. This study was intended as the basis for the system understanding of the shallow lake of Caohai. The study consisted of two steps. First we collected available environmental, hydrological and pollution data from Kunming authorities and other sources. It was possible to parameterise a lake model model based on the preliminary data set. It supported first estimations of management scenarios. But the first and quick answers came with a relevant vagueness. Relevant monitoring data was still missing like P release from lake-internal sediment.Because data uncertainty causes model uncertainty and model uncertainty causes planning and management uncertainties, we recommended and conducted a thorough sediment and river pollution monitoring campaign in 2017. Examination of the sediment phosphorus release and additional measurements of N and P was crucial for the improvement of the shallow lake model of Caohai. In May 2018 we presented and discussed the results of StoLaM shallow lake model of Caohai and the outcomes of a set of management scenarios.The StoLaM shallow lake model for Caohai used in SINOWATER indicates that sediment dredging could contribute to the control of algae by limitation of phosphorus, but sediment management can only produce sustainable effects when the overall nutrient input and especially the phosphorus input from the inflows will be reduced significantly.
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Huntington, Ellsworth. "16. An Archipelago of Sand Dunes in a Lake of Central Asia". W Geography Toward History, 266–73. Piscataway, NJ, USA: Gorgias Press, 2009. http://dx.doi.org/10.31826/9781463213633-019.

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Mulatu, Chalachew Abebe. "Alteration of the Fogera Plain Flood Regime Due to Ribb Dam Construction 3". W Downstream Consequences of Ribb River Damming, Lake Tana Basin, Ethiopia, 75–106. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003281290-5.

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Streszczenia konferencji na temat "Dune lakes"

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Gorgenson, Ian, Brian Yurk, Suzanne J. DeVries-Zimmerman i Edward Hansen. "DUNE DISTRIBUTION ALONG THE LAURENTIAN GREAT LAKES: THE EFFECTS OF WIND AND WAVES". W GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-303904.

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Bustos, David, David W. Love, Bruce D. Allen, Vincent L. Santucci i Jonathan P. Knapp. "DIVERSE ARRAY OF SOFT-SEDIMENT FOSSIL VERTEBRATE TRACKS FROM THE LAKES OF WORLD’S LARGEST GYPSUM DUNE FIELD". W GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287403.

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Zular, Andre, Giselle Utida, Francisco W. Cruz, André O. Sawakuchi, Hong Wang, Márcia Bicego, Paulo César Fonseca Giannini, Selma I. Rodrigues, Guilherme P. B. Garcia i Vinícius R. Mendes. "THE EFFECTS OF MID-HOLOCENE FLUVIO-EOLIAN INTERPLAY AND COASTAL DYNAMICS ON THE FORMATION OF DUNE-DAMMED LAKES IN NE BRAZIL". W GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-331723.

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Arbogast, Alan F., G. William Monaghan i William A. Lovis. "ARE COASTAL DUNE ACTIVATION CYCLES IN THE GREAT LAKES (USA) LINKED WITH THOSE AT CAPE COD (USA) AND NORTHERN EUROPE DURING THE LATE HOLOCENE?" W GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322915.

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Catianis, Irina, Gabriel Iordache, Adriana Maria Constantinescu, Ana Bianca Pavel i Oana Dobre. "ASSESSMENT OF THE ABUNDANCE AND DISTRIBUTION OF THE EMERGENT AQUATIC VEGETATION IN THE DANUBE DELTA, ROMANIA. THE CASE STUDY OF TATARU AND UZLINA LAKES". W 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/2.1/s11.45.

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This paper presents the findings of the mapping and evaluation of macrophyte vegetation from Tataru and Uzlina lakes, located within Danube Delta, Romania. Throughout time, the Danube Delta unique ecosystem has endured considerable ecological changes due to natural and anthropogenic stressors. Currently, the potential threats are those related to pollution, agriculture, land use, climate change and subsequently, the proliferation and/or the extinction of many macrophyte species. The excessive development of aquatic vegetation has negative consequences, reducing the flow velocity of water in the connecting channels, exacerbates the sedimentation processes in the deltaic lakes which are subject to the clogging phenomenon (i.e., silting). The abundance, distribution and biodiversity of the emergent aquatic species were surveyed in Tataru and Uzlina lakes. The biodiversity of macrophytes is different in the investigated lakes, being dependent on the fluvial input of water and sediment of the Danube River, extent of lakes and water depth. In Tataru Lake, the macrophyte vegetation was represented by a greater variety of species (Nymphaea alba, Nuphar lutea, Trapa natans, Salvinia natans, Lemna minor and Phragmites australis), in comparison to Uzlina Lake (Nymphaea alba, Nuphar lutea, Trapa natans and Phragmites australis). This methodology and results are valuable for the strategic environmental assessment and management of the Danube Delta Biosphere Reserve and can be used in similar settings.
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G. V., Izotova, Vlasenko P. G., Kashinskaya E. N. i Solovyev M. M. "IDENTIFICATION OF DIPLOSTOMOSIS PATHOGENS OF PREDOMINATING FISH SPECIES OF SIBERIA USING DNA-BARCODING APPROACH". W II INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "DEVELOPMENT AND MODERN PROBLEMS OF AQUACULTURE" ("AQUACULTURE 2022" CONFERENCE). DSTU-Print, 2022. http://dx.doi.org/10.23947/aquaculture.2022.53-55.

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Metacercariae of the genus Diplostomum are localized in the eyes and the brain of freshwater fish and cyclostomata species causing different types of diplostomosis. Hyperinvasion by these parasites lead to spatial disorientation, changing in feeding activity, lowering the growth rate, etc. Species identification of Diplostomum spp. based on the morphological features is difficult due to the lack and severity of them. In present study, species diversity of the genus Diplostomum metacercariae parasitizing in fishes of Chany, Baunt and Teletskoye lakes is defined according to the DNA-barcoding approach based on mtDNA fragment cox1 (595 bp). Parasite sequences from the fishes inhabited studied lakes formed 11 clades of the species level. The lowest diversity was noted for an eutrophic Lake Chany – 3 species, whereas for an oligotrophic lakes Teletskoye and Baunt – 8 species were found.
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Tang, Kevin T., i Eby G. Friedman. "Noise estimation due to signal activity for capacitively coupled CMOS logic gates". W the 10th Great Lakes Symposium. New York, New York, USA: ACM Press, 2000. http://dx.doi.org/10.1145/330855.331035.

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Gao, Lijun, i Keshab K. Parhi. "Models for power consumption and power grid noise due to datapath transition activity". W the 11th Great Lakes Symposium. New York, New York, USA: ACM Press, 2001. http://dx.doi.org/10.1145/368122.368891.

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Xia, Tian, Peilin Song i Hao Zheng. "Characterizing the VCO jitter due to the digital simultaneous switching noise". W the 15th ACM Great Lakes symposium. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1057661.1057680.

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Guo, Jin, Antonis Papanikolaou, Michele Stucchi, Kristof Croes, Zsolt Tokei i Francky Catthoor. "A tool flow for predicting system level timing failures due to interconnect reliability degradation". W the 18th ACM Great Lakes symposium. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1366110.1366180.

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Raporty organizacyjne na temat "Dune lakes"

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Hagedorn, G. W., I. R. Smith, R. C. Paulen i M. Ross. Surficial geology, Enterprise, Northwest Territories, NTS 85-C/9, 10, 15, and 16. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328292.

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The Enterprise map area is a low-relief terrain bisected by a prominent Devonian carbonate bedrock escarpment. Ice-flow indicators show a clockwise shift in Laurentide Ice Sheet flow from southwest (230°), to west (280°), to northwest (305°). A late-stage southwestward surge from the Great Slave Lake basin is also preserved as drumlinoid ridges below the escarpment. During deglaciation, ice retreat impounded northeastern drainage forming local ice-contact lakes and areas of subaerial glaciofluvial outwash. As ice continued to retreat, the northern portion of the map area became inundated by glacial Lake McConnell, within which the Snake Creek Moraine and associated subaqueous fans formed. Prominent flights of beach ridges record the drainage of this lake. Exposed nearshore and littoral lake sediments were subsequently remobilized into eolian dunes. Bogs and fens have formed over much of the low relief landscape and display extensive thermokarst.
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Casper, Gary, Stefanie Nadeau i Thomas Parr. Acoustic amphibian monitoring, 2019 data summary: Sleeping Bear Dunes National Lakeshore. National Park Service, grudzień 2022. http://dx.doi.org/10.36967/2295512.

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Amphibians are a Vital Sign indicator for monitoring long-term ecosystem health in seven national park units that comprise the Great Lakes Network. We present here the results for 2019 amphibian monitoring at Sleeping Bear Dunes National Lakeshore (SLBE). Appendices contain tabular summaries for six years of cumulative results. The National Park Service Great Lakes Inventory and Monitoring Network established 10 permanent acoustic amphibian monitoring sites at SLBE in 2013. Acoustic samples are collected by placing automated recorders with omnidirectional stereo microphones at each of the 10 sampling sites. Temperature loggers co-located with the recorders also collect air temperature during the sampling period. We expanded analyses and reporting in 2018 to address calling phenology and to provide a second metric for tracking changes in abundance across years. Occupancy analyses track whether or not a site was occupied by a species. Abundance is tracked by assessing how the maximum call intensity changes on sites across years, and by how many automated detections are reported from sites across years. Using two independent survey methods, manual and automated, with large sample sizes continues to return reliable results, providing a confident record of site occupancy for most species. The monitoring program detected five of the six species of frog and toad known to occur at SLBE in 2019, with Eastern American Toad, Gray Treefrog, Green Frog and Spring Peeper occurring at almost every site sampled. Wood Frog was found at one new site, and Northern Leopard Frog was not confirmed in 2019 but was detected at five sites in 2018. There were no significant data collection issues in 2019 except for late deployment of SLBE11, which limited data analyses for this site. Remaining sites successfully collected data as programmed. Cumulative data collection result summaries since inception are provided in appendices. Since temperature logs show that the threshold of ≥40°F was often exceeded by 1 April in 2019, making 15 March a start date for data collection may be considered if park personnel feel snow and ice cover would be reduced enough by that date as well.
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Johnson, Bradley D. Lake Michigan: Prediction of Sand Beach and Dune Erosion for Flood Hazard Assessment. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2012. http://dx.doi.org/10.21236/ada571220.

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Casper, Gary, Stfani Madau i Thomas Parr. Acoustic amphibian monitoring, 2019 data summary: Mississippi National River and Recreation Area. National Park Service, grudzień 2022. http://dx.doi.org/10.36967/2295507.

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Amphibians are a Vital Sign indicator for monitoring long-term ecosystem health in seven national park units that comprise the Great Lakes Network. We present here the results for 2019 amphibian monitoring at Mississippi National River and Recreation Area (MISS). Appendices contain tabular summaries for six years of cumulative results. The National Park Service Great Lakes Inventory and Monitoring Network established 10 permanent acoustic amphibian monitoring sites at MISS in 2015. Acoustic samples are collected by placing automated recorders with omnidirectional stereo microphones at each of the 10 sampling sites. Temperature loggers co-located with the recorders also collect air temperature during the sampling period. Eight of the nine species of frog and toad known to occur at MISS were found in 2019. The most well distributed species were Eastern American Toad, Gray Treefrog, Green Frog, and Northern Leopard Frog. Rarer are Blanchard’s Cricket Frog, Cope’s Gray Treefrog, Wood Frog, and Boreal Chorus Frog. American Bullfrog has not yet been detected on GLKN monitored sites but has been recently confirmed nearby (Pigs Eye Lake). Two of the ten sites—MISS02, MISS04—were not sampled in 2019 due to flooding, and occupancy of early calling species at MISS06 was determined inconclusive due to a late sampling start. MISS07 was also deployed late and results may contain some false absences due to late sampling. We expanded analyses and reporting in 2018 to address calling phenology and to provide a second metric for tracking changes in abundance (as opposed to occupancy) across years. Occupancy analyses track whether or not a site was occupied by a species. Abundance is tracked by assessing how the maximum call intensity changes on sites across years, and by how many automated detections are reported from sites across years. Using two independent survey methods, manual and automated, with large sample sizes continues to return reliable results, providing a confident record of site occupancy for most species. There were some data collection issues in 2019, with two ARS units not deployed and two others with late start dates. This did reduce our ability to assess some sites and species. Summaries of 2019 data are shown in Appendices A, B and C, and cumulative data collection result summaries are provided in Appendix E. Since temperature logs show that the threshold of ≥40°F was already exceeded by 1 April in 2019, we recommend a 15 March start date for future data collection.
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Goodwin, Katy, i Alan Kirschbaum. Acoustic monitoring for bats at Indiana Dunes National Park: Data summary report for 2016–2019. National Park Service, luty 2022. http://dx.doi.org/10.36967/nrds-2290144.

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The Great Lakes Inventory and Monitoring Network initiated an acoustic monitoring program for bats in 2015. At Indiana Dunes National Park, monitoring began in 2016. This report presents results for the 2016–2019 surveys. Acoustic recordings were analyzed using the software program Kaleidoscope Pro and a subset of files were manually reviewed to confirm species identifications. Seven of the eight bat species previously documented at the park were reconfirmed. These include big brown bat, eastern red bat, hoary bat, silver-haired bat, evening bat, little brown bat, and tricolored bat. In addition, the Kaleidoscope software classified some acoustic files to northern long-eared bat and Indiana bat, however none of these recordings were verified through manual vetting. Activity levels for six of the nine species (big brown bat, hoary bat, silver-haired bat, evening bat, northern long-eared bat, and Indiana bat) appeared to be stable or slightly increasing. For northern long-eared and Indiana bats, observed activity levels were very low in all four years, so we may not have adequate data to assess trends for those species. The remaining three species (eastern red bat, little brown bat, and tricolored bat) showed slightly decreasing trends.
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Nichols, Dale S. Estimating lake susceptibility to acidification due to acid deposition. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1990. http://dx.doi.org/10.2737/nc-rp-289.

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Marks, David R. Mute Swans. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, luty 2018. http://dx.doi.org/10.32747/2018.7208745.ws.

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Mute swans (Cygnus olor) are an invasive species originally brought to the United States in the late 19th and early 20th centuries for ornamental ponds and lakes, zoos and aviculture collections. Original populations were located in northeastern states along the Hudson Valley but have since expanded to several Midwestern states and portions of the western U.S. and Canada. Mute swan damage includes competing with native waterfowl, destroying native plants, spreading disease, and colliding with aircraft. They are also considered a nuisance in some areas due to their abundant fecal droppings and aggressiveness towards people. Some have questioned the status of mute swans as an introduced species, but multiple reviews by scientists and the U.S. Fish and Wildlife Service clearly support the conclusion that mute swans are not native to North America. The Migratory Bird Treaty Act, therefore, does not protect mute swans, and management authority falls under jurisdiction of the states and Tribes.
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Hodul, M., H. P. White i A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).
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Johnson, Sarah, Michael Sinclair, Emily Leonard i Forrest Rosenbower. Development of strategies for monitoring and managing sandscape vegetation, with an assessment of declining vegetation in the Apostle Islands National Lakeshore. National Park Service, kwiecień 2022. http://dx.doi.org/10.36967/nrr-2293187.

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Coastal dune habitats such as those of the Apostle Islands National Lakeshore (APIS) are regionally rare habitats of global and state-wide concern. Their dynamic, sandy landforms provide habitat for unique species specifically adapted to frequent disturbance, drought, and other stresses. Despite having disturbance-driven life histories, these species are at risk due to increased visitor use of sandscape habitats and environmental change. Resource managers at APIS have long understood the values of these sandscapes and threats presented by recreational trampling, but more recently they have recognized the precarious position that these coastal habitats are in due to their proximity to the lake and exposure to weather-related phenomena linked with long-term climate change. In recognition of emerging threats and the need to track impacts of these threats, park managers initiated a revision of their methods for monitoring sandscape vegetation. We applied these methods to 15 sandscape locations within the national lakeshore in 2014. Here, we outline what these revisions to the methods were, assess the current status of sandscape structure and composition, assess the utility of data collected with these methods, provide suggestions for further revisions of the sampling method, outline a two-tiered sampling approach for future monitoring, and we provide management recommendations. In a second section of the report, we provide a focused assessment of the size and health of Juniperus communis (common juniper), a target species of concern in these sandscape communities after it was observed by park managers to be dying or stressed on Michigan Island. Our assessments include the status of J. communis across all sandscapes monitored in 2014, and an analysis of change over time since 2012 in the health of J. communis on Michigan, Outer, and Stockton Islands. We provide evidence of impacts by rodents on foliar dieback, primarily on Michigan Island, and we discuss possible interactions with the non-native pale juniper web-worm (Aethes rutilana) and with climate change.
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Johnson, Sarah, Michael Sinclair, Emily Leonard i Forrest Rosenbower. Development of strategies for monitoring and managing sandscape vegetation, with an assessment of declining vegetation in the Apostle Islands National Lakeshore. National Park Service, kwiecień 2022. http://dx.doi.org/10.36967/nrr-2293187.

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Coastal dune habitats such as those of the Apostle Islands National Lakeshore (APIS) are regionally rare habitats of global and state-wide concern. Their dynamic, sandy landforms provide habitat for unique species specifically adapted to frequent disturbance, drought, and other stresses. Despite having disturbance-driven life histories, these species are at risk due to increased visitor use of sandscape habitats and environmental change. Resource managers at APIS have long understood the values of these sandscapes and threats presented by recreational trampling, but more recently they have recognized the precarious position that these coastal habitats are in due to their proximity to the lake and exposure to weather-related phenomena linked with long-term climate change. In recognition of emerging threats and the need to track impacts of these threats, park managers initiated a revision of their methods for monitoring sandscape vegetation. We applied these methods to 15 sandscape locations within the national lakeshore in 2014. Here, we outline what these revisions to the methods were, assess the current status of sandscape structure and composition, assess the utility of data collected with these methods, provide suggestions for further revisions of the sampling method, outline a two-tiered sampling approach for future monitoring, and we provide management recommendations. In a second section of the report, we provide a focused assessment of the size and health of Juniperus communis (common juniper), a target species of concern in these sandscape communities after it was observed by park managers to be dying or stressed on Michigan Island. Our assessments include the status of J. communis across all sandscapes monitored in 2014, and an analysis of change over time since 2012 in the health of J. communis on Michigan, Outer, and Stockton Islands. We provide evidence of impacts by rodents on foliar dieback, primarily on Michigan Island, and we discuss possible interactions with the non-native pale juniper web-worm (Aethes rutilana) and with climate change.
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