113 results on '"wind protection"'
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2. Fruit Quality and Yield of Mandarin (Citrus reticulata) in Orchards with Different Windbreaks in the Western Cape, South Africa
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Geldenhuys, Heinrich, Lötze, Elmi, and Veste, Maik
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- 2023
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3. Improving Coping Strategies with Weather and Climate Risks in Agricultural Production, Including the Improved Use of Insurance Approaches: Multiple Cropping
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Stigter, Kees and Stigter, Kees, editor
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- 2010
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4. Introduction to Part II (INSAM Examples)
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Stigter, Kees and Stigter, Kees, editor
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- 2010
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5. Evaluating the efficiency of wind protection by windbreaks based on remote sensing and geographic information systems
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Yang, Xiguang, Li, Fengri, Fan, Wenyi, Liu, Guiwei, and Yu, Ying
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- 2021
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6. Thermal comfort index and infrared temperatures for lambs subjected to different environmental conditions
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Tiago do Prado Paim, Rafhael Felipe Saraiva Martins, Cyntia Cardoso, Bruno Dallago, Helder Louvandini, and Concepta McManus
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Brazilian savanna ,bioclimatology ,thermal stress ,wind protection ,artificial warming ,Agriculture (General) ,S1-972 - Abstract
There is an abundance of thermal indices with different input parameters and applicabilities. Infrared thermography is a promising technique for evaluating the response of animals to the environment and differentiating between genetic groups. Thus, the aim of this study was to evaluate superficial body temperatures of lambs from three genetic groups under different environmental conditions, correlating these with thermal comfort indices. Forty lambs (18 males and 22 females) from three genetic groups (Santa Inês, Ile de France × Santa Inês and Dorper × Santa Inês) were exposed to three climatic conditions: open air, housed and artificial heating. Infrared thermal images were taken weekly at 6h, 12h and 21h at the neck, front flank, rear flank, rump, nose, skull, trunk and eye. Four thermal comfort indices were calculated using environmental measurements including black globe temperature, air humidity and wind speed. Artificial warming, provided by infrared lamps and wind protection, conserved and increased the superficial body temperature of the lambs, thus providing lower daily thermal ranges. Artificial warming did not influence daily weight gain or mortality. Skin temperatures increased along with increases in climatic indices. Again, infrared thermography is a promising technique for evaluating thermal stress conditions and differentiating environments. However, the use of thermal imaging for understanding animal responses to environmental conditions requires further study.
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- 2014
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7. Windbreaks in North American agricultural systems
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Brandle, J. R., Hodges, L., Zhou, X. H., Nair, P. K. R., editor, Rao, M. R., editor, and Buck, L. E., editor
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- 2004
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8. ОСОБЕННОСТИ ФОРМИРОВАНИЯ АЭРАЦИОННОГО РЕЖИМА ЖИЛОЙ ЗАСТРОЙКИ НА СКЛОНОВЫХ ТЕРРИТОРИЯХ
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аэрационный режим ,CFD modeling ,aeration regime ,wind protection ,Murmansk ,Russian Arctic ,склоновые территории ,АЗРФ ,CFD-моделирование ,comfort of residential development ,ветрозащита ,Мурманск ,комфортность жилой застройки ,slope territories - Abstract
Статья посвящена оценке и особенностям формирования аэрационного режима жилой застройки на склоновых территориях АЗРФ. В условиях нехватки резервных территорий для роста поселений Арктической зоны РФ (АЗРФ) вопрос освоения неудобных территорий стоит достаточно остро. Портовые города Северного морского пути, которые располагаются на территории АЗРФ, в большинстве случаев располагаются в АЗРФ на сложном рельефе — склоновых территориях, застройка которых представляет собой градостроительную задачу по формированию комфортной и безопасной городской среды. Одними из самых интересных с точки зрения архитектурно-строительного освоения являются склоновые территории, которые имеют значительное распространения в портовых городах Северного морского пути (СМП) (Мурманск, Архангельск, Певек, Владивосток и др.). Приемы планировки жилых зон городской застройки, а также ее внешнего и внутреннего благоустройства, рассчитанные на равнинную местность, не могут быть применены без снижения качества городской среды, что обуславливает необходимость проведения научных исследований по разработке градостроительных решений жилых зон, располагаемых на склоновых территориях. Качество жилого пространства формируется из множества факторов, одним из них является аэрационный режим территории. Аэрационным режимом называется ветровой режим приземного слоя воздуха в условиях городской застройки. Однако единых комфортных значений скорости ветра для любой застройки не существует, поскольку ветровой режим — это ветровые условия, происходящие на определенной территории, а значит, что различные территории со своими ландшафтными и климатическими характеристиками имеют свои особенности формирования аэрационного режима. Таким образом, аэрационный режим одной территории может значительно отличаться от другой. Так как территория АЗРФ характеризуется сложными климатическими условиями — низкими температурами, высокими скоростями ветра и сложным ландшафтом, то определение аэрационного режима таких территории требует особого внимания и учета всех особенностей, в частности, изменений температурного и аэрационного режимов, что неизбежно сказывается на качестве жилой среды., The article is devoted to the assessment and features of the formation of the aeration regime of residential development in the sloping territories of the Russian Arctic. According to Resolution No. 484 of March 30, 2021, a comprehensive program for the socio-economic development of the Arctic zone (AZRF) begins in Russia, which includes the strategic task of urban development. The port cities of the Northern Sea Route, which are located on the territory of the Russian Arctic, in most cases are located in the Russian Arctic on a difficult terrain — sloping territories, the development of which is an urban planning task to form a comfortable and safe urban environment. The techniques of planning residential areas of urban development, as well as its external and internal landscaping, designed for flat terrain cannot be applied without reducing the quality of the urban environment, which necessitates scientific research on the development of urban planning solutions for residential areas located on sloping territories. The quality of the living space is formed from many factors, one of them is the aeration regime of the territory. The aeration regime is called the wind regime of the surface layer of air in urban conditions. However, there are no uniform comfortable values of wind speed for any development, since the wind regime is the wind conditions occurring in a certain territory, which means that different territories with their landscape and climatic characteristics have their own characteristics of the formation of the aeration regime. Thus, the aeration regime of one territory may differ significantly from another. Since the territory of the Russian Arctic is characterized by difficult climatic conditions — low temperatures, high wind speeds and a complex landscape, the determination of the aeration regime of such territories requires special attention and consideration of all features, in particular, changes in temperature and aeration regimes, which inevitably affects the quality of the living environment.
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- 2021
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9. Aeration modes and engineering preparation of slopes
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Lifshits Valeria M., Korobeynikova Anna E., and Dunichkin Ilya V.
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Physics ,geotechnical engineering ,bioclimatic comfort ,wind protection ,lcsh:HD9715-9717.5 ,slopes ,wind power engineering ,lcsh:Construction industry ,wind ,landscape architecture ,lcsh:Architecture ,Humanities ,landscape components ,lcsh:NA1-9428 - Abstract
Предмет исследования: аэрационный режим склоновых территорий различного ландшафта, для которых необходимы мероприятия по инженерной подготовке территории. Цели: анализ закономерностей обтекания склоновых территорий воздушными потоками, влияющими на биоклиматическую комфортность и ветровую эрозию ландшафта. Материалы и методы: даны схемы обтекания склоновых территорий с различными характеристиками, представлена оценка биоклиматической комфортности для человека. Рассмотрены геотехнические методы в решении проблем ветровой эрозии и устойчивости склонов холмов и сложного рельефа в городской черте. Результаты: в настоящее время актуален вопрос адаптации и рекультивации нарушенных земель. Многие из данных территорий, обладающие живописными ландшафтами и хорошими условиями для развития инфраструктуры, ценны с точки зрения градостроительного освоения. На большей части склоновых территорий в отличие от равнинной местности изменены природные температура и влажность, а также гидрологический режим и аэрация, что неизбежно сказывается на качестве жизни и комфорте пребывания потенциальных жителей. Это качество оценивается по биоклиматическому комфорту и безопасности, по совокупности факторов аэрации и температурно-влажностного режима. Важность и новизна исследования в изучении взаимосвязи геометрии склонов и качества среды очевидна, так как снижение уровня биоклиматического комфорта неизбежно приводит к снижению развития близлежащих городских территорий, проблемам с климатом и местным климатом, а также к снижению качества жизни людей. Рассматриваются связь пластики рельефа с аэрационным режимом территории; зависимость аэродинамических шероховатостей от их высоты; особенности аэрации склонового и холмистого рельефа; факторы, влияющие на направление и скорость ветра и методы изучения аэрационного режима склоновых территорий. Приведены результаты комплексных исследований по склоновым территориям и рекомендации по усовершенствованию проектных решений. Рассматривается вопрос ветровой эрозии и биоклиматической комфортности территории на склоне с учетом аэрационного режима. Выводы: продемонстрированы возможности применения геотехнических сооружений для укрепления склонов с использованием биопозитивных конструкций, которые влияют на параметры аэрации и биоклиматического комфорта среды, что повышает индикаторы здоровья населения.
- Published
- 2018
10. Energy saving processes in huddling emperor penguins: from experiments to theory.
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Gilbert, Caroline, Blanc, Stéphane, Le Maho, Yvon, and Ancel, André
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EMPEROR penguin , *ENERGY conservation , *APTENODYTES , *ANIMAL behavior , *EGG incubation , *BODY temperature , *METABOLISM , *ORNITHOLOGY - Abstract
This paper investigates the energy savings of male emperor penguins Aptenodytes forsteri linked to their huddling behaviour, the key factor that allows them to assume their incubating task while undergoing a long fast. Drawing on new studies by our team, this review examines the energetic benefits accrued from huddling and estimates the respective contributions of wind protection, exposure to mild ambient temperatures, reduction in cold-exposed body surfaces and body temperature adjustments In these energy savings. The metabolic rate of 'loosely grouped' birds (restrained in small groups of 5-10 individuals, which are unable to huddle effectively) is reduced by 39% compared to metabolic rate of 'isolated' birds, with 32% of these energetic benefits due to wind protection. In addition, metabolic rate of 'free-ranging' emperors, i.e. able to move freely and to huddle, is on average 21% lower than that of 'loosely grouped' birds. Exposure to mild ambient temperatures within the groups and reduction in coldexposed body surfaces while huddling, though overestimated, would represent a 38% metabolic reduction. About two thirds of metabolic lowering is attributable to the reduction in coldexposed body surfaces and one third to the mild microclimate created within the groups. Moreover, body temperature adjustments contribute to these energetic beneflts: maintaining body temperatures 1&x#00B0;C lower would represent a 7-17% reduction in energy expenditure. These processes, linked together, explain how huddling emperors save energy and maintain a constant body temperature, which ensures a successful incubation in the midst of the austral winter. [ABSTRACT FROM AUTHOR]
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- 2008
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11. WIND PROTECTION OF LANDSCAPE ARCHITECTURE
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N. A. Trubitsyna
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business.industry ,bioclimatic comfort ,Environmental resource management ,landscape and architectural structures and complexes ,wind protection ,lcsh:HD9715-9717.5 ,gas vents ,kinetic windmills ,wind power engineering ,Landscape architecture ,wind permeability ,lcsh:Construction industry ,large-scale ,landscape buildings ,wind ,landscape architecture ,Business ,kinetic sculptures ,hedges ,lcsh:Architecture ,lcsh:NA1-9428 - Abstract
The article discusses the interaction between the wind regime and the landscape. Examples of objects of landscape architecture in high-tech and science-intensive spheres, such as the launch pad of a spacecraft, are given. Wind protection is represented as a result of work on wind power engineering and a means of increasing bioclimatic comfort. The terms of landscape architecture are disclosed and mutual influence on the climate and impact on woody-shrub vegetation and field crops are analyzed. The phenomenon of air permeability for optimal operation of windproof structures and orientations of geoplastics and dendroplastics is described. In this paper, a classification of terrain types is described with a description of their elemental composition, as well as various categories of landscape. The proposal to consider the landscape as a territorial complex, and landscape buildings, landscape-architectural structures as objects of landscape architecture possessing properties of wind protection and air permeability was introduced. Thus, the concept of a landscape-architectural complex as a single group of landscape-architectural objects located on the territory and connected by a common system of communications, functions, technical elements and a visual image is formulated. Further research is based on the rationale for the use of the term ensemble in relation to the objects of the landscape and architectural complex and the identification of their design and planning features that can affect the parameters of wind protection and air permeability. The paper concludes that frequent coincidence of favorable for the fauna wind regime and mimicry of landscape architecture objects. The combination in the landscape of functions for wind protection and aesthetics is analyzed with analysis of such elements of landscape architecture as hedges and windproof properties of green plantations. In the work examples of wind engineering small architectural forms are shown in the form of sculptures moving from air streams, which also change the speed and direction of the wind. All this is generalized in further directions of research within the framework of the designated terrain theme, bioclimatic comfort and wind protection.
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- 2017
12. Agroforestry solutions to some African wind problems
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Stigter, C.J., Mohammed, Ahmed Eltayeb, Nasr Al-amin, Nawal K., Onyewotu, L.O.Z., Oteng’i, S.B.B., and Kainkwa, R.M.R.
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AGROFORESTRY , *WINDS - Abstract
The Traditional Techniques of Microclimate Improvement-Project was in several cases called upon to find urgently required local solutions to problems caused by wind in Africa, using trees in an agroforestry setting. In Sudan, this was related to wind-induced sand encroachment towards an irrigated area, which could be solved by a shelterbelt. Also, sand settlement by trees and grasses in the source area was researched. In Nigeria, land reclaimed from desertification by multiple shelterbelts had to be brought again into agricultural use under conditions of hot dry winds. In Kenya, mulched intercropping had to be practised under conditions of strong winds, which was made possible by applying hedges all around and intercropped trees. Reductions of strong winds were also studied in north Tanzania with a sufficient and an insufficient density of scattered trees for soil protection. Keeping shade trees appeared necessary for wind protection of coffee on the slopes of the Kilimanjaro, also in northern Tanzania. [Copyright &y& Elsevier]
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- 2002
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13. Hedges and their possibilities
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JOANA AMARAL PAULO and RAQUEL ALMEIDA
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windbreaks ,shelterbelts ,wind protection ,silvopastoral systems ,crops ,silvoarable systems ,agroforestry ,fodder - Abstract
Presentation from the 5th Portuguese RAIN meeting on hedges - windbreaks and shelterbelts, and their possibilities.
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- 2019
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14. Shelterbelts and windbreaks: principles for installation - Cortinas de abrigo e quebra-ventos: princípios para a sua instalação
- Author
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JOANA AMARAL PAULO and RAQUEL ALMEIDA
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hedgerow management ,shrubs ,Hedgerows ,gestão de sebes ,wind protection ,proteção contra o vento ,arbustos ,hedgerow installation ,trees ,árvores ,instalação de sebes ,Sebes vivas - Abstract
O vento pode afetar culturas e animais, atuando direta ou indiretamente nos processos mecânicos ou fisiológicos relacionados com o microclima e o solo. Existem diversos elementos arbóreos que, quando corretamente inseridos numa exploração ou paisagem, permitem reduzir estes efeitos. Ao nível da paisagem estas sebes vivas surgem normalmente combinadas umas com as outras num sistema para reduzir os danos do vento. A escolha das plantas lenhosas certas requer uma ponderação cuidadosa e oportuna das necessidades ecológicas, da estrutura da sebe, do solo, clima, culturas e outros elementos da exploração. Apesar disso, existe um conjunto de princípios comuns a considerar.
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- 2019
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15. Shelterbelts and windbreaks: principles for installation - Pasowe zadrzewienia ochronne i wiatrochłonne: zasady instalacji
- Author
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Amaral Paulo Joana and Almeida Raquel
- Subjects
hedgerow management ,żywopłoty ,krzewy ,shrubs ,ochrona przed wiatrem ,Hedgerows ,drzewa ,wind protection ,sadzenie zadrzewień ,hedgerow installation ,trees ,pielęgnacja żywopłotów - Abstract
Wiatrochrony i ochronne pasy zadrzewień są podstawą w minimalizowaniu szkodliwego wpływu wiatru na uprawy, zwierzęta gospodarskie i mienie. Pełniona przez nie funkcja zależy od wielu czynników, takich jak wysokość, długość, gęstość, grubość pni czy gęstość zasadzenia. W celu zmaksymalizowania funkcji ochronnej należy dobrać odpowiednie gatunki, odpowiednio je rozmieścić i prowadzić prace pielęgnacyjne. Wiatrochrony i pasy zadrzewień mają wiele zalet, ich słabe strony mogą być zminimalizowane poprzez odpowiedni dobór upraw na przylegającym obszarze. - Windbreaks and shelterbelts are fundamental in minimizing the unpleasant effects of wind upon crops, livestock and property. Their function depends on factors including height, length, thickness and density. In order to maximize their wind protection function, it is essential to ensure suitable species selection, good installation and management. Shelterbelts and windbreaks have a multitude of advantages and their disadvantages can be overcome by clever choice of crops for their adjacent areas.
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- 2019
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16. SHELTERBELTS AND WINDBREAKS: PRINCIPLES FOR INSTALLATION - MEZŐVÉDŐ ÉS SZÉLTÖRŐ ERDŐSÁVOK: TELEPÍTÉSÜK ALAPELVEI
- Author
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JOANA AMARAL PAULO
- Subjects
hedgerow management ,shrubs ,fák ,Hedgerows ,sövény telepítés ,sövények ,sövény gazdálkodás ,wind protection ,mezővédő erdősáv ,hedgerow installation ,trees ,cserje ,szélvédelem - Abstract
A szél hatással lehet a növényekre és az állatokra, közvetlenül vagy közvetve a mikroklímával és a talajjal kapcsolatos mechanikai vagy fiziológiai folyamatokra. Számos olyan fás tájképi elem van, amelyek megfelelő tervezés esetén lehetővé teszik ezeknek a hatásoknak a csökkentését. Előnyeik és hátrányaik, valamint telepítésük alapelvei kerülnek itt ismertetésre. - Wind can affect crops and animals, by directly or indirectly acting on mechanical or physiological processes related to microclimate and soil. There are several tree elements that, when correctly planed, allow the reduction of these effects.Their advantages and disadvantages as well as the principles of their installation are described here.
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- 2019
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17. Shelterbelts and windbreaks: principles for installation
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JOANA AMARAL PAULO and RAQUEL ALMEIDA
- Subjects
hedgerow management ,Hedgerows ,shrubs ,AFINET ,factsheet ,wind protection ,hedgerow installation ,trees - Abstract
Wind can affect crops and animals, by directly or indirectly acting on mechanical or physiological processes related to microclimate and soil. There are several tree elements that, when correctly planed, allow the reduction of these effects. At the landscape level, most of the time they are used in combination with each other to reduce wind damage. According to their structure three types of green barriers may be considered (Pavari 1961): 1) shelterbelts - strips of wide multiple rows of trees or shrubs; 2) windbreaks - afforestation with single or multiple rows of trees (up to 4 or 6 maximum); 3) single hedges - single linear elements for the immediate protection of crops, composed by trees, shrubs or other.
- Published
- 2019
- Full Text
- View/download PDF
18. Shelterbelts and windbreaks: principles for installation HD
- Author
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JOANA AMARAL PAULO and RAQUEL ALMEIDA
- Subjects
hedgerow management ,Hedgerows ,shrubs ,AFINET ,factsheet ,wind protection ,hedgerow installation ,trees - Abstract
Wind can affect crops and animals, by directly or indirectly acting on mechanical or physiological processes related to microclimate and soil. There are several tree elements that, when correctly planed, allow the reduction of these effects. At the landscape level, most of the time they are used in combination with each other to reduce wind damage. According to their structure three types of green barriers may be considered (Pavari 1961): 1) shelterbelts - strips of wide multiple rows of trees or shrubs; 2) windbreaks - afforestation with single or multiple rows of trees (up to 4 or 6 maximum); 3) single hedges - single linear elements for the immediate protection of crops, composed by trees, shrubs or other.
- Published
- 2019
- Full Text
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19. The Specificity of Course Works on “The Design of Energy Efficient Buildings” Discipline
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Priemets, O. N., Samoilov, K. I., Приемец, О. Н., Самойлов, К. И., Priemets, O. N., Samoilov, K. I., Приемец, О. Н., and Самойлов, К. И.
- Abstract
The ability to interpret technological innovations in the design of buildings and structures is one of the fundamental skills of the architect. This training has a number of features, some of which are discussed in this paper by the example of performing graphical tasks on the subject of energy-efficient buildings., Умение интерпретировать технологические новации в проектировании зданий и сооружений является одним из основополагающих навыков архитектора. Обучение этому имеет ряд особенностей, часть которых на примере выполнения графических заданий по тематике энергоэффективных зданий рассмотрена в данной работе.
- Published
- 2019
20. Специфика курсовых работ по дисциплине «Проектирование энергоэффективных зданий»
- Author
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Priemets, O. N. and Samoilov, K. I.
- Subjects
ВЕТРОГЕНЕРАТОРЫ ,ВЕТРОЗАЩИТА ,ENERGY EFFICIENCY ,СОЛНЦЕЗАЩИТА ,SOLAR PANELS ,WIND PROTECTION ,АРХИТЕКТУРНОЕ ПРОЕКТИРОВАНИЕ ,ARCHITECTURAL DESIGN ,ЭНЕРГОЭФФЕКТИВНОСТЬ ,СОЛНЕЧНЫЕ БАТАРЕИ ,TEACHING METHODS ,VERTICAL GARDENING ,SUN PROTECTION ,МЕТОДИКА ПРЕПОДАВАНИЯ ,WIND GENERATORS ,BIOCLIMATIC ARCHITECTURE ,ВЕРТИКАЛЬНОЕ ОЗЕЛЕНЕНИЕ ,БИОКЛИМАТИЧЕСКАЯ АРХИТЕКТУРА - Abstract
The ability to interpret technological innovations in the design of buildings and structures is one of the fundamental skills of the architect. This training has a number of features, some of which are discussed in this paper by the example of performing graphical tasks on the subject of energy-efficient buildings. Умение интерпретировать технологические новации в проектировании зданий и сооружений является одним из основополагающих навыков архитектора. Обучение этому имеет ряд особенностей, часть которых на примере выполнения графических заданий по тематике энергоэффективных зданий рассмотрена в данной работе.
- Published
- 2019
21. Carbon on the margins
22. Energy saving processes in huddling emperor penguins: from experiments to theory
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André Ancel, Caroline Gilbert, Stéphane Blanc, Yvon Le Maho, Département Ecologie, Physiologie et Ethologie (DEPE-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), IPEV, and Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Male ,0106 biological sciences ,emperor penguin ,Physiology ,030310 physiology ,Cold climate ,Energy (esotericism) ,wind protection ,Wind ,Aquatic Science ,010603 evolutionary biology ,01 natural sciences ,Body Temperature ,03 medical and health sciences ,Animal science ,Animals ,Molecular Biology ,Ecology, Evolution, Behavior and Systematics ,0303 health sciences ,Behavior, Animal ,biology ,Ecology ,[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] ,Aptenodytes ,Cold Climate ,biology.organism_classification ,Spheniscidae ,huddling ,energetic benefit ,Energy expenditure ,Insect Science ,Metabolic rate ,Environmental science ,Animal Science and Zoology ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Energy Metabolism ,microclimate - Abstract
SUMMARYThis paper investigates the energy savings of male emperor penguins Aptenodytes forsteri linked to their huddling behaviour, the key factor that allows them to assume their incubating task while undergoing a long fast. Drawing on new studies by our team, this review examines the energetic benefits accrued from huddling and estimates the respective contributions of wind protection, exposure to mild ambient temperatures,reduction in cold-exposed body surfaces and body temperature adjustments in these energy savings. The metabolic rate of `loosely grouped' birds(restrained in small groups of 5–10 individuals, which are unable to huddle effectively) is reduced by 39% compared to metabolic rate of `isolated'birds, with 32% of these energetic benefits due to wind protection. In addition, metabolic rate of `free-ranging' emperors, i.e. able to move freely and to huddle, is on average 21% lower than that of `loosely grouped' birds. Exposure to mild ambient temperatures within the groups and reduction in cold-exposed body surfaces while huddling, though overestimated, would represent a 38% metabolic reduction. About two thirds of metabolic lowering is attributable to the reduction in cold-exposed body surfaces and one third to the mild microclimate created within the groups. Moreover, body temperature adjustments contribute to these energetic benefits: maintaining body temperatures 1°C lower would represent a 7–17% reduction in energy expenditure. These processes, linked together, explain how huddling emperors save energy and maintain a constant body temperature, which ensures a successful incubation in the midst of the austral winter.
- Published
- 2008
- Full Text
- View/download PDF
23. Studie zur Beurteilung des Winderosionsschutzes durch Erstaufforstung, Gehölzstreifen und Ackerbau im Nordraum Leipzig
- Author
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Universität Leipzig, Fakultät für Physik und Geowissenschaften, Ziemann, Astrid, Arnold, Klaus, Schönfeldt, Hans-Jürgen, Universität Leipzig, Fakultät für Physik und Geowissenschaften, Ziemann, Astrid, Arnold, Klaus, and Schönfeldt, Hans-Jürgen
- Abstract
In der vorliegenden Studie wird einerseits die Winderosion und der damit verbundene Sedimenttransport hinter ausgedehnten Waldgebieten, die in ihrer Zusammensetzung typisch für den Nordraum von Leipzig sind, und hinter schmalen Gehölzschutzstreifen untersucht. Als Ergebnis dieser Analyse lassen sich Empfehlungen für die günstigsten Eigenschaften von Windschutzanpflanzungen hinsichtlich einer maximalen Schutzwirkung vor Sedimenttransport ableiten. Andererseits wird die Häufigkeit möglicher erosiver Ereignisse am Beispiel einer für das Untersuchungsgebiet repräsentativen meteorologischen Station geprüft. Kritische meteorologische Randbedingungen für erosive Prozesse treten entsprechend einer statistischen Datenanalyse zweimal pro Jahr auf., On the one hand, the wind erosion and the associated sediment transport behind extensive forest areas, which are typically for the northern area of Leipzig, and behind narrow shelterbelts were examined in this study. Recommendations for the favourable properties of such protective arrangements with reference to the maximal shelter effect against sediment transport follow from this analyses. On the other hand, the :frequency of the potential occurrence of erosion will be proofed by data of a representatively meteorological station. Critically meteorological conditions appear two times per year corresponding to the statistical analyses.
- Published
- 2016
24. Thermal comfort index and infrared temperatures for lambs subjected to different environmental conditions
- Author
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Helder Louvandini, Rafhael Felipe Saraiva Martins, Cyntia Cardoso, Concepta McManus, Tiago do Prado Paim, and Bruno Stéfano Lima Dallago
- Subjects
Rump ,Ecology ,Infrared ,Wet-bulb globe temperature ,Infrared lamp ,Thermal comfort ,Brazilian savanna ,wind protection ,lcsh:S1-972 ,Wind speed ,thermal stress ,Animal science ,Thermography ,artificial warming ,Environmental science ,Animal Science and Zoology ,lcsh:Agriculture (General) ,bioclimatology ,Agronomy and Crop Science ,Open air - Abstract
There is an abundance of thermal indices with different input parameters and applicabilities. Infrared thermography is a promising technique for evaluating the response of animals to the environment and differentiating between genetic groups. Thus, the aim of this study was to evaluate superficial body temperatures of lambs from three genetic groups under different environmental conditions, correlating these with thermal comfort indices. Forty lambs (18 males and 22 females) from three genetic groups (Santa Inês, Ile de France × Santa Inês and Dorper × Santa Inês) were exposed to three climatic conditions: open air, housed and artificial heating. Infrared thermal images were taken weekly at 6h, 12h and 21h at the neck, front flank, rear flank, rump, nose, skull, trunk and eye. Four thermal comfort indices were calculated using environmental measurements including black globe temperature, air humidity and wind speed. Artificial warming, provided by infrared lamps and wind protection, conserved and increased the superficial body temperature of the lambs, thus providing lower daily thermal ranges. Artificial warming did not influence daily weight gain or mortality. Skin temperatures increased along with increases in climatic indices. Again, infrared thermography is a promising technique for evaluating thermal stress conditions and differentiating environments. However, the use of thermal imaging for understanding animal responses to environmental conditions requires further study.
- Published
- 2014
25. Windbreaks in North American agricultural systems
- Author
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Brandle, J.R., Hodges, L., and Zhou, X.H.
- Published
- 2004
- Full Text
- View/download PDF
26. Landbouwbedrijven in het landschap: de ruimtelijke wisselwerking tussen landbouwbedrijf en landschap nader bekeken
- Subjects
friesland ,heggen ,perceptie ,milieu ,wind protection ,landschap ,landscape ,perception ,windbescherming ,agricultural land ,landbouw ,Biologische bedrijfssystemen ,windsingels ,shelterbelts ,hedges ,environment ,Biological Farming Systems ,landbouwgrond ,agriculture - Abstract
Diversity in plantations around conventional and organic farm buildings
- Published
- 1998
27. Barreras rompevientos con álamos y sauces
- Author
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Thomas, Esteban Ricardo and Rodriguez, Andrea Betiana
- Subjects
Windbreaker Curtain ,Cortina Rompeviento ,Windbreak Trees ,Protección Contra el Viento ,Windbreaks ,Salix ,Neuquén ,Rompeviento ,Wind Protection ,Sauce ,Álamo ,Willows ,Populus ,Rio Negro (Argentina) ,Poplar ,Arboles Rompevientos - Abstract
En los valles irrigados de Río Negro y Neuquén, el viento es considerado una adversidad climática. Los vientos predominantes en primavera y verano provienen del oeste y sudoeste con una alta frecuencia de velocidades mayores a 20 km/h y ráfagas que alcanzan los 80 Km/h, generando deshidratación y daños mecánicos en los cultivos. El uso de barreras forestales permite disminuir su velocidad, atenuando los efectos perjudiciales sobre el desarrollo de los cultivos agrícolas y la calidad de su producción. En nuestra región se plantan cortinas rompevientos con álamos (Populus spp.) y en menor proporción con sauces (Salix spp.), ya que ambas especies están bien adaptadas a las condiciones agroclimáticas. Predomina el uso de los álamos criollo (P. nigra ‘Itálica’) y chileno (P. nigra ‘Chile’), aunque también se utilizan otros álamos: Blanc de Garonne (P. nigra ‘Jean Pourtet’), híbridos euroamericanos (P. xcanadensis) I-214, I-488, Conti 12 y Guardi; plateados (P. alba var. pyramidalis “Bolleana” y P. xcanescens) y chino (P. simonii). Entre los sauces, se usan los híbridos 131-25 y 131-27 (S. babylonica x S. alba ‘Ragonese 131-25 INTA’ y ‘Ragonese 131-27 INTA’). EEA Alto Valle Fil: Thomas, Esteban Ricardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina Fil: Rodríguez, Andrea Betiana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
- Published
- 2014
28. Cover and barrier effect of Cassia siamea hedgerows on soil conservation in semi-arid Kenya
- Author
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Paul Kiepe
- Subjects
heggen ,Erosion control ,wind protection ,windbescherming ,waterbescherming ,Lixisol ,windsingels ,Alfisol ,shelterbelts ,Irrigation and Soil and Water Conservation ,Crop yield ,erosion control ,General Engineering ,soil conservation ,water conservation ,PE&RC ,Windbreak ,Tropische cultuurtechniek ,kenya ,erosiebestrijding ,Agronomy ,Environmental science ,hedges ,bodembescherming ,Surface runoff ,Soil conservation ,Mulch - Abstract
The contribution of Cassia siamea hedgerows and mulch to erosion control was evaluated on a 14% slope of a Lixisol/Alfisol at Machakos, Kenya. The four treatments, in 400 m 2 runoff-plots were: hedgerows with prunings applied as mulch to the crop, hedgerows and crops with prunings removed, mulch only applied to the crop and a control. The hedgerows were planted on the contour, 4 m apart and 0.25 m between plants. Maize and cowpea were planted in sequence. The control plot sustained an average annual water loss over 3 y of 31 mm runoff and soil loss of 19 t ha −1 . The best treatment, hedgerows with mulch, reduced losses to 13% and 2% of the control. Hedgerows without mulch reduced losses respectively to 23% and 7%, while mulch without hedgerows reduced losses to 41% and 17%. Soil loss was considerably influenced by one single storm in April 1990 due to the nature of that storm and to the susceptibility of the soil to erosion at that particular time. Differences in crop yield between treatments were small. The hedgerow treatments depressed cowpea yield slightly in less than normal rainy seasons but improved cowpea yields in wet seasons.
- Published
- 1996
- Full Text
- View/download PDF
29. wind, de wind, dat hemelse kind
- Author
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Hilbert, J. and Hilbert, J.
- Abstract
Het antwoord van Hans en Grietje op de vraag van de heks wie aan haar huisje knabbelt, was het thema van een workshop ‘the aerodynamics of trees’ van prof. dr. Bodo Ruck van de universiteit van Karlsruhe op 13 februari 2012. Deze workshop was georganiseerd door de SAG Baumstatik. SAG staat voor Sachverständigen- Arbeitsgemeinschaft. De werkgroep bestaat uit specialisten op het gebied van de stabiliteit van bomen, onder wie bekende namen als Lothar Wessolly, Erk Brudi en Michael Schlag. In totaal zijn leden uit 11 landen bij de SAG aangesloten. De workshops van één dag hebben als doel om op een bepaald aspect rond de stabiliteit van bomen in te zoomen. vaak wordt hiervoor iemand van buitenaf gevraagd, die binnen het vakgebied de nodige kennis en diepgang heeft.
- Published
- 2012
30. Windgordijnen te kust en te keur : groeien en stalinrichting
- Abstract
Windgordijnen voor melkveestallen zijn er in allerlei soorten en maten. Waar moet je op letten bij de aanschaf en het gebruik? Geert Vervaeke, al ruim 20 jaar actief in deze markt, vertelt.
- Published
- 2012
31. Houtwallen van invloed op aangrenzende percelen
- Subjects
heggen ,natuur ,yields ,plant pests ,plantenplagen ,nature ,wind protection ,opbrengsten ,onkruiden ,windbescherming ,microklimaat ,windsingels ,houtwallen ,shelterbelts ,weeds ,hedges ,Proefstation voor de Akkerbouw en de Groenteteelt in de Vollegrond ,hedgerows ,microclimate - Abstract
De overheid stimuleert de aanleg van natuur op het platteland en houtwallen staan hierbij in de belangstelling. Houtwallen beinvloeden echter de gewasopbrengsten en het microclimaat op de aangrenzende percelen
- Published
- 1999
32. influence of treeline structure and wind protection on commuting and foraging common pipistrelles (Pipistrellus pipistrellus)
- Author
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Verboom, B., Huitema, H., Verboom, B., and Huitema, H.
- Abstract
Effecten van windbeschutting op het landschapsgebruik door gewone dwergvleermuizen. In het windrijke kustgebied Walcheren is de invloed onderzocht van structuureigenschappen van houtsingels op foeragerende dwergvleermuizen. Hoogte, breedte en vegetatiedichtheid van de singels bleken bepalend voor de mate waarin vleermuizen langs de bomenrijen foerageerden
- Published
- 2010
33. Impact of wind bora on Croatian highways and bridges
- Author
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Petar Sesar, Ana Krečak, Hancuff, Tim, and Jacques Combault
- Subjects
Croatian ,Engineering ,business.industry ,language ,bora ,wind elocity ,wind direction ,impact on structures and traffic ,wind protection ,wind bora ,wind speed and direction ,wind barriers ,business ,Civil engineering ,language.human_language - Abstract
This paper describes problems caused by wind along motorway section Sveti Rok Tunnel – Posedarje Interchange. Due to relief characteristics along this section (Velebit Mountain meets Adriatic coast) wind velocity and direction vary a lot. During the wintertime, northern to northeastern wind bora blows in this region (Figure 1) reaching enormous wind velocities. Studies have shown that the lateral wind speed exceeding 30 m/s is critical for vehicle's stability on a dry roadway. During stronger wind blows and severe roadway conditions, mentioned motorway section is closed for traffic.
- Published
- 2005
- Full Text
- View/download PDF
34. Emissiebeperking door combinatie van een windhaag en het éénzijdig bespuiten van de laatste appelboomenrij
- Author
-
Wenneker, M., Heijne, B., and van de Zande, J.C.
- Subjects
wind effects ,fruit growing ,Applied Plant Research, Fruit Research Unit ,fruitteelt ,appels ,wind protection ,PRI Agrosysteemkunde ,windbescherming ,Praktijkonderzoek Plant & Omgeving, Sector Fruit ,emissie ,emission ,windeffecten ,Agrosystems ,apples - Abstract
Om het milieu en in het bijzonder het oppervlaktewater zo min mogelijk te belasten met gewasbe4 schermingsmiddelen, wordt er door de fruitteeltsector een uiterste inspanning verricht om de emissie naar het milieu beperkt te houden. Door wet4 en regelgeving (Lozingenbesluit open teelt en veehouderij en de Bestrijdingsmiddelenwet) wordt hierin verder aandacht geschonken. De emissie kan op verschillende ma4 nieren beperkt worden (technische4 en teeltmaatregelen). Een teeltmaatregel is bijvoorbeeld het aanleggen van een teeltvrije zone, waardoor de afstand tussen het te bespuiten gewas en het oppervlaktewater vergroot wordt, en de emissie (driftdepositie) af zal nemen. Wanneer op de teeltvrije zone een windhaag wordt geplaatst, zal de driftdepositie op het oppervlaktewater door de afvangende werking van de haag verder verminderen. Ook het éénzijdig bespuiten van de buitenste fruitbomenrij is een manier om de emissie buiten de boomgaard te beperken. In het beschreven onderzoek is het effect van een elzenwindhaag en het éénzijdig bespuiten van de buiten4 ste bomenrij op de emissie gemeten in vergelijking met een standaard bespuiting (tweezijdige bespuiting met de Albuz lila dop, holle kegel, 7 bar spuitdruk). Het onderzoek werd uitgevoerd in boomgaarden die representatief waren voor commerciële boomgaarden. De bespuitingen werden uitgevoerd met een Munckhof dwarsstroomspuit. Het aantal doppen werd aangepast aan de boomhoogte. Het spuitvolume in de proef varieerde van 177 – 368 l.ha41 (afhankelijk van de appelboomhoogte en aantal geopende spuit4 doppen).
- Published
- 2004
35. Emissiebeperking door combinatie van een windhaag en het éénzijdig bespuiten van de laatste appelboomenrij
- Subjects
wind effects ,Sector Fruit ,fruit growing ,fruitteelt ,appels ,wind protection ,Applied Plant Research ,PRI Agrosysteemkunde ,windbescherming ,emissie ,emission ,Praktijkonderzoek Plant & Omgeving ,windeffecten ,Agrosystems ,Fruit Research Unit ,apples - Abstract
Om het milieu en in het bijzonder het oppervlaktewater zo min mogelijk te belasten met gewasbe4 schermingsmiddelen, wordt er door de fruitteeltsector een uiterste inspanning verricht om de emissie naar het milieu beperkt te houden. Door wet4 en regelgeving (Lozingenbesluit open teelt en veehouderij en de Bestrijdingsmiddelenwet) wordt hierin verder aandacht geschonken. De emissie kan op verschillende ma4 nieren beperkt worden (technische4 en teeltmaatregelen). Een teeltmaatregel is bijvoorbeeld het aanleggen van een teeltvrije zone, waardoor de afstand tussen het te bespuiten gewas en het oppervlaktewater vergroot wordt, en de emissie (driftdepositie) af zal nemen. Wanneer op de teeltvrije zone een windhaag wordt geplaatst, zal de driftdepositie op het oppervlaktewater door de afvangende werking van de haag verder verminderen. Ook het éénzijdig bespuiten van de buitenste fruitbomenrij is een manier om de emissie buiten de boomgaard te beperken. In het beschreven onderzoek is het effect van een elzenwindhaag en het éénzijdig bespuiten van de buiten4 ste bomenrij op de emissie gemeten in vergelijking met een standaard bespuiting (tweezijdige bespuiting met de Albuz lila dop, holle kegel, 7 bar spuitdruk). Het onderzoek werd uitgevoerd in boomgaarden die representatief waren voor commerciële boomgaarden. De bespuitingen werden uitgevoerd met een Munckhof dwarsstroomspuit. Het aantal doppen werd aangepast aan de boomhoogte. Het spuitvolume in de proef varieerde van 177 – 368 l.ha41 (afhankelijk van de appelboomhoogte en aantal geopende spuit4 doppen).
- Published
- 2004
36. Mogelijke alternatieve haagsoorten voor emissiebeperking bij gewasbespuitingen in de fruitteelt
- Subjects
Sector Fruit ,heggen ,fruit growing ,fruitteelt ,netherlands ,wind protection ,Applied Plant Research ,windbescherming ,nederland ,emissie ,emission ,Praktijkonderzoek Plant & Omgeving ,Fruit Research Unit ,zeeland ,hedges - Published
- 2004
37. Mogelijke alternatieve haagsoorten voor emissiebeperking bij gewasbespuitingen in de fruitteelt
- Author
-
Wenneker, M., Anbergen, R.H.N., and Heijne, B.
- Subjects
heggen ,fruit growing ,Applied Plant Research, Fruit Research Unit ,fruitteelt ,netherlands ,wind protection ,windbescherming ,nederland ,Praktijkonderzoek Plant & Omgeving, Sector Fruit ,emissie ,emission ,zeeland ,hedges - Published
- 2004
38. Switching Feedlot Dietary Fiber Level for Cattle Fed in Winter
- Author
-
Mader, T. L., Davis, M. S., Dahlquist, J. M., Parkhurst, A. M., Mader, T. L., Davis, M. S., Dahlquist, J. M., and Parkhurst, A. M.
- Abstract
Four feeding regimens were evaluated in two different outside facilities [tree windbreak provided (SP) vs no wind protection provided (NP)] over two winter seasons. Feeding regimens were 1) 7.5% (DM basis) alfalfa hay (AH) diet (Low- Low); 2) 15% (DM basis) AH diet switched to a 7.5% (DM basis) AH diet under cold stress conditions (High-Low); 3) 7.5% (DM basis) AH diet switched to a 15% (DM basis) AH diet under cold stress conditions (Low-High); and 4) 15% (DM basis) AH diet (High-High). For feeding regimens High-Low and Low- High, cold stress was determined by use of a model, based on weather conditions and previous DMI, to predict lower critical temperature. Cattle fed in facilities with SP tended to perform better under a Low-Low feeding regimen; cattle fed in facilities with NP tended to benefit from the extra energy provided by switching to a lower fiber diet (High-Low feeding regimen) during cold stress. Across both facilities, the 5-d moving averages of wind chill index (WCI) and WCI >800 units had the best correlation with change in DMI. All diets except the High-High diet displayed significant linear relationships with increases in DMI and climatic variables in the NP facility, whereas cattle fed only the High- High diet displayed significant relationships in the SP facility. Heat production associated with the added fiber does not appear to be greater than that from added grain. Switching feedlot cattle, under cold stress, to higher fiber diets was not beneficial.
- Published
- 2001
39. Houtwallen van invloed op aangrenzende percelen
- Author
-
Zwart-Roodzant, M.H.
- Subjects
heggen ,natuur ,yields ,plant pests ,plantenplagen ,nature ,wind protection ,opbrengsten ,onkruiden ,windbescherming ,microklimaat ,windsingels ,houtwallen ,shelterbelts ,weeds ,hedges ,Proefstation voor de Akkerbouw en de Groenteteelt in de Vollegrond ,hedgerows ,microclimate - Abstract
De overheid stimuleert de aanleg van natuur op het platteland en houtwallen staan hierbij in de belangstelling. Houtwallen beinvloeden echter de gewasopbrengsten en het microclimaat op de aangrenzende percelen
- Published
- 1999
40. The use of edge habitats by commuting and foraging bats
- Subjects
communication between animals ,heggen ,verspreiding ,communicatie tussen dieren ,wind protection ,diergemeenschappen ,sounds ,windbescherming ,animal communities ,animals ,feeding behaviour ,voedingsgedrag ,Wildlife Ecology and Conservation ,Chiroptera ,windsingels ,shelterbelts ,dieren ,geluiden ,geluidsleer ,Nederland ,hedges ,acoustics ,dispersal ,Netherlands - Abstract
Travelling routes and foraging areas of many bat species are mainly along edge habitats, such as treelines, hedgerows, forest edges, and canal banks. This thesis deals with the effects of density, configuration, and structural features of edge habitats on the occurrence of bats. Four hypothetical functions of edge habitats for bats were studied: foraging areas, shelter from wind, shelter from avian predators, and acoustical landmarks.Both wind and food abundance were found to affect the occurrence of foraging pipistrelle bats, Pipistrellus pipistrellus, near treelines. Feeding activity of pipistrelle bats was positively related to height, width and foliage density of treelines. The preference by pipistrelle bats of commuting routes leading from the roost to foraging areas was explained by the distribution of potentially good feeding sites at close distance from the roost.The results stress the importance of wind protected areas where bats can feed during windy conditions. Predator avoidance is argued to be a constraint on the movements of commuting bats at relatively high light levels, i.e. at dusk and dawn. Indications that vertical landscape elements play a role in the navigation by bats as acoustical landmarks come from a study where pond bats, Myotis dasycneme, commuting over canals gradually adapted their pulse emissions to the distance to the banks. Practical guidelines are provided to implement the results into the planning, conservation, and management of edge habitats for bats.
- Published
- 1998
41. Landbouwbedrijven in het landschap: de ruimtelijke wisselwerking tussen landbouwbedrijf en landschap nader bekeken
- Author
-
Reitsma, T., Hendriks, K., and Stobbelaar, D.J.
- Subjects
friesland ,heggen ,perceptie ,milieu ,wind protection ,landschap ,landscape ,perception ,windbescherming ,agricultural land ,landbouw ,Biologische bedrijfssystemen ,windsingels ,shelterbelts ,hedges ,environment ,Biological Farming Systems ,landbouwgrond ,agriculture - Abstract
Diversity in plantations around conventional and organic farm buildings
- Published
- 1998
42. The use of edge habitats by commuting and foraging bats
- Author
-
Verboom, B., Agricultural University, H.H.T. Prins, and J. Veen
- Subjects
communication between animals ,heggen ,verspreiding ,communicatie tussen dieren ,wind protection ,diergemeenschappen ,sounds ,windbescherming ,animal communities ,animals ,feeding behaviour ,voedingsgedrag ,Wildlife Ecology and Conservation ,Chiroptera ,windsingels ,shelterbelts ,dieren ,geluiden ,geluidsleer ,Nederland ,hedges ,acoustics ,dispersal ,Netherlands - Abstract
Travelling routes and foraging areas of many bat species are mainly along edge habitats, such as treelines, hedgerows, forest edges, and canal banks. This thesis deals with the effects of density, configuration, and structural features of edge habitats on the occurrence of bats. Four hypothetical functions of edge habitats for bats were studied: foraging areas, shelter from wind, shelter from avian predators, and acoustical landmarks.Both wind and food abundance were found to affect the occurrence of foraging pipistrelle bats, Pipistrellus pipistrellus, near treelines. Feeding activity of pipistrelle bats was positively related to height, width and foliage density of treelines. The preference by pipistrelle bats of commuting routes leading from the roost to foraging areas was explained by the distribution of potentially good feeding sites at close distance from the roost.The results stress the importance of wind protected areas where bats can feed during windy conditions. Predator avoidance is argued to be a constraint on the movements of commuting bats at relatively high light levels, i.e. at dusk and dawn. Indications that vertical landscape elements play a role in the navigation by bats as acoustical landmarks come from a study where pond bats, Myotis dasycneme, commuting over canals gradually adapted their pulse emissions to the distance to the banks. Practical guidelines are provided to implement the results into the planning, conservation, and management of edge habitats for bats.
- Published
- 1998
43. The use of edge habitats by commuting and foraging bats
- Author
-
Prins, H.H.T., Veen, J., Verboom, B., Prins, H.H.T., Veen, J., and Verboom, B.
- Abstract
Travelling routes and foraging areas of many bat species are mainly along edge habitats, such as treelines, hedgerows, forest edges, and canal banks. This thesis deals with the effects of density, configuration, and structural features of edge habitats on the occurrence of bats. Four hypothetical functions of edge habitats for bats were studied: foraging areas, shelter from wind, shelter from avian predators, and acoustical landmarks.Both wind and food abundance were found to affect the occurrence of foraging pipistrelle bats, Pipistrellus pipistrellus, near treelines. Feeding activity of pipistrelle bats was positively related to height, width and foliage density of treelines. The preference by pipistrelle bats of commuting routes leading from the roost to foraging areas was explained by the distribution of potentially good feeding sites at close distance from the roost.The results stress the importance of wind protected areas where bats can feed during windy conditions. Predator avoidance is argued to be a constraint on the movements of commuting bats at relatively high light levels, i.e. at dusk and dawn. Indications that vertical landscape elements play a role in the navigation by bats as acoustical landmarks come from a study where pond bats, Myotis dasycneme, commuting over canals gradually adapted their pulse emissions to the distance to the banks. Practical guidelines are provided to implement the results into the planning, conservation, and management of edge habitats for bats.
- Published
- 1998
44. No runoff, no soil loss : soil and water conservation in hedgerow barrier systems
- Author
-
Kiepe, P., Agricultural University, and L. Stroosnijder
- Subjects
heggen ,wind protection ,mulchen ,infiltration ,windbescherming ,waterbescherming ,infiltratie ,windsingels ,shelterbelts ,Irrigation and Soil and Water Conservation ,kwel ,mulching ,seepage ,erosion control ,soil conservation ,water conservation ,Tropische cultuurtechniek ,erosiebestrijding ,hydraulisch geleidingsvermogen ,stromulches ,turf ,peat ,hedges ,bodembescherming ,straw mulches ,hydraulic conductivity - Abstract
Land degradation by water erosion represents a serious, and fast increasing, environmental threat. Hedgerow barriers control water erosion through the presence of the tree stem and through an increase in infiltration beneath the hedgerow. The infiltration rate beneath hedgerows is 3-8 times higher than in the alley where crops are grown. Soil water content measurements in hedgerow barrier systems indicate that infiltrated water penetrates the soil beneath hedgerows deeper than the soil beneath the alley and the control. An analytical framework for calculating the impact of hedgerows and mulch on infiltration, runoff and soil loss is presented here. The framework was expanded with algorithms to calculate the impact of hedgerows of various densities, ranging from 1-4 rows. The framework was applied on a seasonal basis and the predictions were satisfactory. Extreme events can be explained when dynamic soil and plant conditions are incorporated. A dynamic simulation model called SHIELD has been developed that explains the experimental observations for runoff, soil loss and crop yields using daily time steps. Application of the model illustrates the importance of dynamic soil and plant conditions to the amount of soil being lost and shows that SHIELD can be used to compute the maximum desired distance between hedgerows with respect to tolerable soil loss.
- Published
- 1995
45. No runoff, no soil loss : soil and water conservation in hedgerow barrier systems
- Subjects
heggen ,wind protection ,mulchen ,infiltration ,windbescherming ,waterbescherming ,infiltratie ,windsingels ,shelterbelts ,Irrigation and Soil and Water Conservation ,kwel ,mulching ,seepage ,erosion control ,soil conservation ,water conservation ,Tropische cultuurtechniek ,erosiebestrijding ,hydraulisch geleidingsvermogen ,stromulches ,turf ,peat ,hedges ,bodembescherming ,straw mulches ,hydraulic conductivity - Abstract
Land degradation by water erosion represents a serious, and fast increasing, environmental threat. Hedgerow barriers control water erosion through the presence of the tree stem and through an increase in infiltration beneath the hedgerow. The infiltration rate beneath hedgerows is 3-8 times higher than in the alley where crops are grown. Soil water content measurements in hedgerow barrier systems indicate that infiltrated water penetrates the soil beneath hedgerows deeper than the soil beneath the alley and the control. An analytical framework for calculating the impact of hedgerows and mulch on infiltration, runoff and soil loss is presented here. The framework was expanded with algorithms to calculate the impact of hedgerows of various densities, ranging from 1-4 rows. The framework was applied on a seasonal basis and the predictions were satisfactory. Extreme events can be explained when dynamic soil and plant conditions are incorporated. A dynamic simulation model called SHIELD has been developed that explains the experimental observations for runoff, soil loss and crop yields using daily time steps. Application of the model illustrates the importance of dynamic soil and plant conditions to the amount of soil being lost and shows that SHIELD can be used to compute the maximum desired distance between hedgerows with respect to tolerable soil loss.
- Published
- 1995
46. De flora en vegetatie van lijnvormige beplantingen in Nederland
- Author
-
Knol, W.C.
- Subjects
heggen ,landscape ecology ,research ,Winand Staring Centre for Integrated Land, Soil and Water Research ,wind protection ,landschap ,landscape ,vegetatie ,onderzoek ,windbescherming ,plant communities ,social behaviour ,Staring Centrum ,vegetation ,windsingels ,shelterbelts ,Nederland ,hedges ,landschapsecologie ,sociaal gedrag ,Netherlands ,plantengemeenschappen - Published
- 1994
47. De flora en vegetatie van lijnvormige beplantingen in Nederland
- Subjects
heggen ,landscape ecology ,research ,Soil and Water Research ,wind protection ,landschap ,landscape ,vegetatie ,onderzoek ,windbescherming ,plant communities ,social behaviour ,vegetation ,Staring Centrum ,windsingels ,Winand Staring Centre for Integrated Land ,shelterbelts ,Nederland ,hedges ,landschapsecologie ,sociaal gedrag ,Netherlands ,plantengemeenschappen - Published
- 1994
48. De invloed van een windhaag op emissies bij fruitteeltspuiten = The reduction of the drift of pesticides in fruit growing by a wind-break
- Author
-
Porskamp, H.A.J., Michielsen, J.M.P.G., and Huijsmans, J.F.M.
- Subjects
plant protection ,heggen ,Institute of Agricultural and Environmental Engineering ,fruit growing ,gewasbescherming ,drift ,plants ,fruitteelt ,wind protection ,planten ,pesticides ,windbescherming ,Instituut voor Mechanisatie, Arbeid en Gebouwen ,oogstschade ,spraying ,pesticiden ,windsingels ,crop damage ,shelterbelts ,hedges ,spuiten - Published
- 1994
49. De invloed van een windhaag op emissies bij fruitteeltspuiten = The reduction of the drift of pesticides in fruit growing by a wind-break
- Subjects
plant protection ,heggen ,Institute of Agricultural and Environmental Engineering ,fruit growing ,gewasbescherming ,drift ,plants ,fruitteelt ,Instituut voor Mechanisatie ,wind protection ,planten ,pesticides ,windbescherming ,oogstschade ,spraying ,pesticiden ,windsingels ,crop damage ,shelterbelts ,hedges ,spuiten ,Arbeid en Gebouwen - Published
- 1994
50. Interet des insectes et araignees presents sur des haies vis-avis de vergers de pommiers conduits en lutte integree
- Author
-
Schoemans, P. and Schoemans, P.
- Abstract
Onderzoek naar het effect van heggen op de populatie nuttige insekten voor de geintegreerde bestrijding in appelboomgaarden
- Published
- 1995
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