Small Landscape Research Articles

A similarity-based method for three-dimensional prediction of soil organic matter concentration

This paper presents an approach to predicting three-dimensional (3D) variation of soil organic matter (SOM) concentration by integrating a similarity-based method with depth functions. It was tested in a small hilly landscape. A depth function model was constructed to fit SOM profile distribution using a linear relation in the topsoil and a power function in the subsoil. Then, under the assumption that similar environmental conditions at two sites would lead to the development of similar profile morphologies and thus similar depth function parameters, the similarity-based method was used to spatially interpolate the depth function parameters based on their relationships with environmental variables. With the values of the parameters for every location, a 3D map of SOM distribution was generated. The predicted SOM pattern well reproduced the statistical distribution of the pedon dataset used in this study. The overall mean error (ME) was 0.06gkg−1 and ratio of performance to deviation (RPD) was 2.34. We conclude that the proposed approach is effective and accurate for 3D SOM prediction. It overcomes two drawbacks of the frequently used pseudo 3D soil mapping approach: (1) the neglect of vertical soil pattern when performing horizontal soil predictions, and (2) the repeated applications of depth function fittings in the mapping process, both of which may lead to prediction errors. Moreover, the similarity-based method is a transparent and traceable prediction process, allowing for easy interpretation of its results. This is useful for understanding soil–environmental relationships and processes. The method thus is an attractive alternative to the commonly used non-linear “black-box” techniques such as artificial neural networks.

Voices from the Crimson Clouds Library: Reading Liu Rushi's (1618–1664)Misty Willows by Moonlit Dike

Misty Willows by Moonlit Dike , painted in 1643 by the celebrated courtesan-turned-gentry-lady Liu Yin (1618–1664, better known as Liu Rushi), and documented by the literary talent Qian Qianyi (1582–1664), serves as the definitive statement on the romantic and artistic union of this eminent pair of cultural figures precisely a year before the fall of the Ming dynasty. It also reflects upon a complex gender dimension in the expression of reclusion entangled with the trauma of dynastic transition. This is revealed, in part, by two additions to the scroll: a small landscape painting of eight years later dedicated to Liu by her close female associate, Huang Jieling (ca. 1620-ca. 1669), and a long commemorative preface that Qian Qianyi wrote for Huang in 1651 reminiscing on bygone glory through the topos of their beloved Jianyun Library that tragically burnt down in 1650. Through a close reading of Liu’s and Huang’s paintings and Qian’s inscriptions on the scroll, this article aims to explore the macrocultural milieu of the time by examining, on the one hand, these two female paradigms of reclusion, and on the other the collective sentiment and memory of the catastrophe of the Ming-Qing dynastic transition as voiced through words and images in their paintings, calligraphy, and the iconography of the willow.

Analysis Principles of Landscape Design Small City

The status quo of China's small urban landscape design were analyzed and summarized the relevant principles of landscape design. Advocated the use of "anti-planning" theory, starting from the geographical features, historical context and ecological construction, to create a harmonious and beautiful and pleasant small city landscape image Habitat landscape environment, so that small urban landscape toward crafting, ecological harmony sustainable development and the direction of development.

Ceritinib for the treatment of late-stage (metastatic) non-small cell lung cancer.

Over the past decade, the non-small cell lung cancer therapeutics landscape has been dominated by the increasing focus on identification and validation of molecular targets, as well as the identification of the best candidate agents to address these targets. Among the notable successes have been the approval of erlotinib, gefitinib, and afatinib for the EGFR mutation, and more recently crizotinib for anaplastic lymphoma kinase (ALK) gene rearrangement. Despite the excellent efficacy of crizotinib, several mechanisms of resistance, including secondary mutation in the ALK gene, eventually result in disease progression, and several second-generation ALK inhibitors, notably ceritinib, have demonstrated evidence of clinical activity in this setting. This review discusses the data associated with the recent accelerated approval of ceritinib for treatment of patients with ALK-positive, metastatic lung adenocarcinoma with disease progression on or who are intolerant to crizotinib.

1963—2009年金塔绿洲变化对绿洲景观格局的影响

PDF HTML阅读 XML下载 导出引用 引用提醒 1963-2009年金塔绿洲变化对绿洲景观格局的影响 DOI: 10.5846/stxb201304080639 作者: 作者单位: 干旱环境与气候变化协同创新中心,干旱环境与气候变化协同创新中心,干旱环境与气候变化协同创新中心,干旱环境与气候变化协同创新中心,干旱环境与气候变化协同创新中心 作者简介: 通讯作者: 中图分类号: F301.24 基金项目: 中央高校基本科研业务费专项资金资助(lzujbky-2013-m02); 教育部"春晖计划"科研项目(Z2011028) Spatio-temporal change and its effects on landscape pattern of Jinta Oasis in Arid China from 1963 to 2009 Author: Affiliation: Collaborative Innovation Centre for Arid Environments and Climate Change CAEC,Key Laboratory of Western China’s Environmental Systems Ministry of Education,Lanzhou University,Collaborative Innovation Centre for Arid Environments and Climate Change CAEC,Key Laboratory of Western China’s Environmental Systems Ministry of Education,Lanzhou University,Collaborative Innovation Centre for Arid Environments and Climate Change CAEC,Key Laboratory of Western China’s Environmental Systems Ministry of Education,Lanzhou University,Collaborative Innovation Centre for Arid Environments and Climate Change CAEC,Key Laboratory of Western China’s Environmental Systems Ministry of Education,Lanzhou University,Collaborative Innovation Centre for Arid Environments and Climate Change CAEC,Key Laboratory of Western China’s Environmental Systems Ministry of Education,Lanzhou University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:内陆河流域绿洲与荒漠景观之间的相互作用与影响机制是干旱区景观地理学的重要内容之一。绿洲时空变化及其对区域景观格局影响的研究,对流域绿洲管理和环境保护具有重要的指导意义和科学价值。以中国西北干旱区内陆河流域水土资源开发的典型代表区域——金塔绿洲为例,基于5期不同的卫星遥感数据,利用数理统计模型及景观指数等方法开展绿洲变化过程、趋势、空间分布格局和景观结构特征变化研究。结果表明:(1)1963-2009年间金塔绿洲主要以扩张为主,绿洲面积增加了167.37 km2,绿洲与荒漠间相互转化剧烈,呈现出非平衡-平衡-极端不平衡的趋势状态。绿洲变化主要体现在西坝乡、羊井子湾乡的绿洲外延扩张和在三合乡-中东-大庄子乡、金塔镇-中东镇、古城乡等地的绿洲内部填充合并。(2)近46 a来金塔绿洲景观的分形特征、离散程度和破碎化程度趋于减小,各景观斑块则趋于简单和均匀化。(3)绿洲变化在一定程度上影响着绿洲景观格局,导致景观结构趋于均匀化和密集化,绿洲斑块镶嵌体表现出散布-扩张-破碎-融合扩展的变化过程。 Abstract:Oasis was a small and medium scale zonal ecological landscape, and the basic places to sustain human activities and developments in the arid area. Under the influence of the increasing human activities and the change of global climate, oasis change (Oasification and desertification) was not only the most direct reflect of environmental change in the arid area, but also was one of the most active research fields of land degradation and regional sustainable development. Recently, the interaction mechanism between oasis change and landscape pattern had been regarded as an important content of regional environmental change research in arid areas. In China, oases were mainly distributed in temperate and warm temperate desert areas, but only took up 4%-5% of the total area of the northwestern China. However, more than 90% of the population and 95% of social wealth were concentrated within these oases. Jinta oasis located in the Hexi Corridor in arid northwestern China, was not only a typical oasis with long agricultural history, but also was an agro-pastoral transitional zone and ecologically fragile area. Due to the rapid growth of population, economic pressure and excess exploitation using the resources, the ecological environment and sustainable development of Jinta oasis were greatly affected. Therefore, we took Jinta oasis as a case to study oasis spatio-temporal change from 1963 to 2009 and its influence on the landscape pattern. Based on Keyhole satellite photograph in the 1963, Landsat MSS images in the 1973, TM and ETM images from 1986 to 2009, the land cover were divided into two categories: oasis and desert. Oasis included farmland, grassland, woodland, water and residential area which based on classification criteria of Chinese National Technical Standard for Land-Use Survey; desert included salinized land, bare land, desert, Gobi and low coverage grassland which the vegetation cover degree ≤ 15%.The results were tested by the field investigation, the GPS sampling and interview with local people. After then, the process, trend and spatial pattern change in Jinta oasis and the characteristic of landscape pattern changes were analyzed by a set of mathematical statistical models and indice of landscape ecology. The results showed that: Jinta oasis was being in an unbalanced state, oasis scale and area expanded gradually with an increase of 167.37km2 during the period of 1963-2009. Simultaneously, the area of Jinta oasis achieved its maximum with 523.17km2 in 2009. The conversion between oasis and non-oasis was frequent and violent and showed a state of imbalance-balance-extreme imbalance condition, although the degree of conversion was different in different periods. And then, most change of the oasis happened as the reclamation of abandoned land and desert area, especially in the inner and outer marginal area of oasis, such as Yangjingziwan township, Xiba township, Sanhe-Dongba -Dazhuangzi township zone, Jinta-Zhongdong township zone. The area, size and spatial distribution of oasis influenced by human activity had resulted in fundamental changes of oasis landscape pattern. The fractal characteristics, dispersion degree and fragmentation of Jinta oasis were decreased, and the oasis landscape tended to be simple and uniform. All in all, in the latest 46 years, the spatio-temporal change of Jinta oasis drove the change of local landscape pattern to the decrease of the diversity, complex structure and landscape heterogeneity. 参考文献 相似文献 引证文献

Well site extraction from Landsat-5 TM imagery using an object- and pixel-based image analysis method

Well sites, including both well pads and exploratory core holes, are small polygonal landscape disturbance features approximately one half to one hectare (0.5–1 ha) in area, resulting from oil and gas exploration activities. Automatic extraction and monitoring of such small features using remote-sensing technology at regional scales has always been desirable for wildlife habitat monitoring and environmental planning and modelling. Due to the vast disturbances of well sites in a province like Alberta, Canada, high-resolution imagery is not practical for well site extraction. For operational purposes, mid-resolution and cost-effective satellite imagery such as Landsat is the choice. However, automatic well site extraction using mid-resolution satellite imagery is a challenging task. Wells are typically less than three pixels in width and length in a Landsat multispectral image. Furthermore, the spectral contrast between the well site pixels and the surrounding areas is low due to vegetation regrowth and the spectral complexity of the surrounding environment. This article presents a novel methodology for automatic extraction of well sites from Landsat-5 TM imagery. The method combines both pixel- and object-based image analyses and contains three major steps: geometric enhancement, segmentation, and well site extraction. The method was applied to Landsat-5 TM images acquired over Fort McMurray, Alberta, Canada. For accuracy assessment, four regions of interest were selected and the results of the proposed automatic method were evaluated against visual inspection of the Landsat-8 pan-sharpened image. The method results in a total average correctness, completeness, and quality measures of about 80, 96, and 77%, respectively over the four sites. In addition, the method is very fast as an entire Landsat scene is processed in less than 10 minutes. The method is an operational approach for automatic detection of well sites over the entire province and can dramatically reduce the labour cost of manual digitization for monitoring and updating well site maps.

Properties of selected mutations and genotypic landscapes under Fisher's geometric model.

The fitness landscape-the mapping between genotypes and fitness-determines properties of the process of adaptation. Several small genotypic fitness landscapes have recently been built by selecting a handful of beneficial mutations and measuring fitness of all combinations of these mutations. Here, we generate several testable predictions for the properties of these small genotypic landscapes under Fisher's geometric model of adaptation. When the ancestral strain is far from the fitness optimum, we analytically compute the fitness effect of selected mutations and their epistatic interactions. Epistasis may be negative or positive on average depending on the distance of the ancestral genotype to the optimum and whether mutations were independently selected, or coselected in an adaptive walk. Simulations show that genotypic landscapes built from Fisher's model are very close to an additive landscape when the ancestral strain is far from the optimum. However, when it is close to the optimum, a large diversity of landscape with substantial roughness and sign epistasis emerged. Strikingly, small genotypic landscapes built from several replicate adaptive walks on the same underlying landscape were highly variable, suggesting that several realizations of small genotypic landscapes are needed to gain information about the underlying architecture of the fitness landscape.

Identification of weeping crabapple cultivars by microsatellite DNA markers and morphological traits

Ornamental crabapples are small landscape trees with charming flowers, colourful fruits and many growth forms. The first weeping crabapple cultivars, Malus prunifolia ‘Pendula’ and ‘Pendula Nova’, were described in Sweden around 150 years ago. Our study was aimed at identification and characterization of weeping crabapple clones by microsatellite markers and morphological traits. We analysed 13 Swedish and Finnish trees and 8 reference accessions including M. prunifolia ‘Pendula’ and three international cultivars belonging to its progeny. The 21 trees represented 13 distinct genotypes. Five local trees were identified as the historical ‘Pendula’, assumed to be extinct from the nursery trade. On the basis of morphological traits and historical records, two old Swedish trees were concluded to represent ‘Pendula Nova’. The authenticity of the trees could not be confirmed by DNA markers because no known plant of the old cultivar was found in botanical collections. The Finnish clone ‘Hyvingiensis’ proved unique among the crabapple accessions studied. ‘Hyvingiensis’ was probably raised from seed at the Finnish State Railways Nurseries about 110 years ago. Several mislabellings were revealed among both the local and the reference samples. A novel identification key was created to aid discrimination between the clones by their morphological traits. A combination of DNA fingerprints, comparison of morphological traits and tracing information in relevant archives and old garden literature proved useful for solving the origin and identity of weeping crabapples. The results contribute to conservation of garden plants and stabilization of horticultural nomenclature.

Old Plates, New Impressions: Local Landscape Prints in Seventeenth-Century Antwerp

In about 1640, the Antwerp print publisher Johannes Galle reissued a sixteenth-century print series known as the Small Landscapes. He made several additions and changes to the original plates that fundamentally realigned the representational status of the original prints, reflecting and responding to contemporary perceptions of the countryside around Antwerp toward the end of the Eighty Years’ War. The changing functions and meanings of the prints when they appeared in this new historical context suggest the importance of a diachronic approach to the study of print publishing and print culture in the early modern period.

Study on Monitoring Protection of Ecological Landscape Based on Permanent GPS Sites

This paper aims at landscape environment problems of small towns in cold area, the ecological principle, landscape planning and design combining with economics, discusses make use of original equipment and resources ,on the basis of the original small towns ecological landscape in the cold area,the feasibility of the protection and repairment to the ecological landscape in small towns ,probes the mode in ecological landscape industrialization in the universal small towns of cold area, so as to ameliorate the malpractices bring about by the extensive mode of current economic development in the small towns,to open up another road for the development of economy in small towns.

Phoenix roebelenii: Pygmy Date Palm

The pygmy date palm is one of the most popular small landscape palms in Florida. It is single-stemmed, but is often grown in clumps of 2–4 closely spaced individuals which, when older, give the impression of a multi-stemmed palm. This revised 4-page fact sheet was written by Timothy K. Broschat and published by the UF Department of Environmental Horticulture, August 2014.
 ENH-600/ST441: Phoenix roebelenii: Pygmy Date Palm (ufl.edu)

Is habitat amount important for biodiversity in rocky shore systems? A study of South African mussel assemblages

Habitat-forming species on rocky shores are often subject to high levels of exploitation, but the effects of subsequent habitat loss and fragmentation on associated species and the ecosystem as a whole are poorly under - stood. In this study, the effects of habitat amount on the fauna associated with mussel beds were investigated, test- ing for the existence of threshold effects at small landscape scales. Specifically, the relationships between mussel or algal habitat amount and: associated biodiversity, associ- ated macrofaunal abundance and density of mussel recruits were studied at three sites (Kidd's Beach, Kayser's Beach and Kini Bay) on the southern and south-eastern coasts of South africa. Samples, including mussel-associated macro- fauna, of 10 × 10 cm were taken from areas with 100 % mussel cover (Perna perna or a combination of P. perna and Mytilus galloprovincialis) at each site. The amount of habitat provided by mussels and algae surrounding the

The Construction of Modern Residences Based on the Concept of “Ecological” Green Community

Landscape planning and design of Chinese residential area is in a continuous development and in-depth exploration stage. The small green landscape design able to both improve the quality of living environment for residents, and also aid in display the unique cultural characteristics of the residence. Greenbelt landscape design problems and issues in modern Chinese residences development were investigated in this paper; principles and methods of ecological planning and design also were proposed.

Effects of Climate Change on Peatlands in the Far North of Ontario, Canada: A Synthesis

The Hudson Bay Lowlands (HBL) is the largest peatland complex in North America. More than 75% of the HBL occurs in Ontario, where the provincial government mandates that ecosystem carbon storage and sequestration be considered in land-use planning. Accomplishing this task requires identifying carbon indicators and assessing their responses to changing ecosystem processes, such as succession, permafrost thaw, and evapotranspiration (ET). Therefore, we synthesized information on peat carbon indicators and ecosystem process from the literature. Findings indicate that the long-term carbon accumulation, carbon dioxide (CO2) sequestration, peat depth, and peatland age were similar (p > 0.10) between dry and wet peatland features. Furthermore, CO2 sequestration displayed the highest variability and ponds were net CO2 emitters. Recent carbon accumulation, CH4 emission, and ET were highest (p < 0.01) in wet features, with CH4 emission displaying wide variation. Increased active layer thickness (105 ± 92 cm per 100 years) in permafrost was the most variable ecosystem process analyzed in this study, while variation in permafrost loss (53 ± 23% per 100 years) was similar to that of carbon accumulation and ET rates. Processes creating wet and pond conditions may increase landscape-scale CO2 and CH4 emissions to the atmosphere, weakening peatland carbon sinks. Dry conditions may reduce CH4 emissions but potentially increase peatland susceptibility to fire. Knowledge of these changes should be useful for climate change vulnerability and adaptation assessments for large landscapes. However, better understanding of variability in CO2 sequestration, CH4 emission, and permafrost dynamics is required to design such assessments for small landscapes.

Characterizing transient thermal interactions between lunar regolith and surface spacecraft

We present a new method, its development, implementation, and verification, for calculating the transient thermal interaction between lunar regolith and moving spacecraft travelling across the surface of the Moon. Regolith temperatures can be determined for lunar landscapes as defined by laser altimeter remote sensing data refined with local crater and boulder models. The purpose of this approach is to enable more detailed, dynamic thermal analyses of mobile systems on the lunar surface rather than relying on worst case, boundary condition design approaches typically used for spacecraft thermal engineering.This new simulation method is based on integrating models that represent small and large scale landscapes; reproduce regolith and boulder temperatures on the Moon; define the position of the Sun; and perform ray tracing to determine infrared and solar heat fluxes between passing objects and the surface. The thermal model of the lunar regolith enhances established models with a slope- and depth-dependent density. The simulation results were verified against remote sensing data obtained from the Diviner Lunar Radiometer Experiment of the Lunar Reconnaissance Orbiter (LRO) and from other sources cited in the literature.The verification results for isolated regolith surface patches showed a deviation from established models of about ±3–6K (±1–6%) during lunar day, and lunar night. For real landscapes such as Crater Calippus and Crater Marius A, the deviation is less than ±15K (±10%) compared to remote sensing data for the majority of measured data points. Only in regions with presumed different regolith material properties, such as steep slopes or depressions, or in regions with a low resolution on the topographic map, were the deviations up to 100K (60%). From the results, empirical equations were derived, which can be used for worst case calculations or to calculate initial temperatures for more elaborate time marching numerical models.The proposed new method could be further enhanced to address scientific questions by incorporating more detailed regolith and boulder models, or be used as-is to evaluate the dynamic thermal envelope of moving spacecraft.

An approach for assessing engineering risk from shale gas wells in the United States

In response to a series of “energy crises” in the 1970s, the United States government began investigating the potential of unconventional, domestic sources of energy to offset imported oil. Hydraulic fracturing applied to vertical tight sand and coal bed methane wells achieved some degree of success during a period of high energy prices in the early 1980s, but shale gas remained largely untapped until the late 1990s with the application of directional drilling, a mature technology adapted from deepwater offshore platforms that allowed horizontal wells to penetrate kilometers of organic-rich shale, and staged hydraulic fracturing, which created high permeability flowpaths from the horizontal wells into a much greater volume of the target formations than previous completion methods.These new engineering techniques opened up vast unconventional natural gas and oil reserves, but also raised concerns about potential environmental impacts. These include short-term and long-term impacts to air and water quality from rig operations, potential migration of gas, fluids and chemicals through the ground, and effects on small watersheds and landscapes from roads, pads and other surface structures.Engineering risk assessment commonly uses integrated assessment models (IAMs), which define sources of risk from features, events and processes. The risk from each system element is assessed using high-fidelity models. Output from these is simplified into reduced-order models, so that a large, integrated site performance assessment can be run using the IAM. The technique has been applied to engineered systems in geologic settings for sequestering carbon dioxide, and it is also applicable to shale gas, albeit with some modifications of the various system elements.Preliminary findings indicate that shale gas well drilling and hydraulic fracturing techniques are generally safe when properly applied. Incident reports recorded by state environmental agencies suggest that human error resulting from the disregard of prescribed practices is the greatest cause of environmental incidents. This can only be addressed through education, regulations and enforcement.

Dynamics and drivers of hantavirus prevalence in rodent populations.

Human encroachment on wildlife habitats has contributed to the emergence of several zoonoses. Pathogenic hantaviruses are hosted by rodents and cause severe diseases in the Americas and Eurasia. We reviewed several factors that potentially drive prevalence (the proportion of infected rodents) in host populations. These include demography, behavior, host density, small mammal diversity, predation, and habitat and landscape characteristics. This review is the first to include a quantitative summary of the literature investigating hantavirus prevalence in rodents. Demographic structure and density were investigated the most and predation the least. Reported effects of demographic structure and small mammal diversity were consistent, whereby reproductive males were most likely to be infected and prevalence decreased with small mammal diversity. The influences of habitat and landscape properties are often complex and indirect. The relationship between density and prevalence merits more investigation. Most hantavirus hosts are habitat generalists and their control is challenging. Incorporating all potential factors and their interactions is essential to understanding and controlling infection in host populations.

Non-CG methylation patterns shape the epigenetic landscape in Arabidopsis.

DNA methylation occurs in CG and non-CG sequence contexts. Non-CG methylation is abundant in plants, and is mediated by CHROMOMETHYLASE (CMT) and DOMAINS REARRANGED METHYLTRANSFERASE (DRM) proteins; however its roles remain poorly understood. Here we characterize the roles of non-CG methylation in Arabidopsis thaliana. We show that a poorly characterized methyltransferase, CMT2, is a functional methyltransferase in vitro and in vivo. CMT2 preferentially binds histone H3 lysine 9 (H3K9) dimethylation and methylates non-CG cytosines that are regulated by H3K9 methylation. We revealed the contributions and redundancies between each non-CG methyltransferase in DNA methylation patterning and in regulating transcription. We also demonstrate extensive dependencies of small RNA accumulation and H3K9 methylation patterning on non-CG methylation, suggesting self-reinforcing mechanisms between these epigenetic factors. The results suggest that non-CG methylation patterns are critical in shaping the histone modification and small non-coding RNA landscapes.

An Infection-Relevant Transcriptomic Compendium for Salmonella enterica Serovar Typhimurium

Bacterial transcriptional networks consist of hundreds of transcription factors and thousands of promoters. However, the true complexity of transcription in a bacterial pathogen and the effect of the environments encountered during infection remain to be established. We present a simplified approach for global promoter identification in bacteria using RNA-seq-based transcriptomic analyses of 22 distinct infection-relevant environmental conditions. Individual RNA samples were combined to identify most of the 3,838 Salmonella enterica serovar Typhimurium promoters in just two RNA-seq runs. Individual in vitro conditions stimulated characteristic transcriptional signatures, and the suite of 22 conditions induced transcription of 86% of all S. Typhimurium genes. We highlight the environmental conditions that induce the Salmonella pathogenicity islands and present a small RNA expression landscape of 280 sRNAs. This publicly available compendium of environmentally controlled expression of every transcriptional feature of S. Typhimurium constitutes a useful resource for the bacterial research community.

Classification of freshwater ice conditions on the Alaskan Arctic Coastal Plain using ground penetrating radar and TerraSAR-X satellite data

Arctic freshwater ecosystems have responded rapidly to climatic changes over the last half century. Lakes and rivers are experiencing a thinning of the seasonal ice cover, which may increase potential over-wintering freshwater habitat, winter water supply for industrial withdrawal, and permafrost degradation. Here, we combined the use of ground penetrating radar (GPR) and high-resolution (HR) spotlight TerraSAR-X (TSX) satellite data (1.25 m resolution) to identify and characterize floating ice and grounded ice conditions in lakes, ponds, beaded stream pools, and an alluvial river channel. Classified ice conditions from the GPR and the TSX data showed excellent agreement: 90.6% for a predominantly floating ice lake, 99.7% for a grounded ice lake, 79.0% for a beaded stream course, and 92.1% for the alluvial river channel. A GIS-based analysis of 890 surface water features larger than 0.01 ha showed that 42% of the total surface water area potentially provided over-wintering habitat during the 2012/2013 winter. Lakes accounted for 89% of this area, whereas the alluvial river channel accounted for 10% and ponds and beaded stream pools each accounted for <1%. Identification of smaller landscape features such as beaded stream pools may be important because of their distribution and role in connecting other water bodies on the landscape. These findings advance techniques for detecting and knowledge associated with potential winter habitat distribution for fish and invertebrates at the local scale in a region of the Arctic with increasing stressors related to climate and land use change.