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Density, Spatial Pattern and Relief Features of Sacred Sites in Northern Morocco 摩洛哥北部圣地密度、空间格局与浮雕特征
Q2 Environmental Science Pub Date : 2013-02-27 DOI: 10.3097/LO.201332
H. Jäckle, M. Rudner, U. Deil
Sacred sites are of conservation value because of their spiritual meaning, as cultural heritage and as remnants of near-natural biotopes in landscapes strongly transformed by man. The vegetation of sacred sites in Morocco was studied recently. Information about their number, spatial pattern or relief position is fragmentary. However, these parameters are important to evaluate their role as refuge for organisms and their representativeness of potential natural vegetation. Therefore, density and spatial pattern of sacred sites on the Tangier Peninsula in NW Morocco were studied based on records on topographic maps and by ground check. Their relief position was examined calculating a logistic regression model based on site-presences and random pseudo-absences. A ground check showed that around 67% of the existing sacred sites are documented in the topographic maps. They occur in the whole study area but are agglomerated around settlements. Although sacred sites occur with preference at elevated sites they can be found in almost all relief positions, thus offering the potential of supporting different types of climax vegetation (climatic climax and pedoclimax). Because of their abundance (around 29 sacred sites / 100 km²) and their distribution pattern they could serve as elements of a biotope network in degraded landscapes.
圣地具有保护价值,因为它们具有精神意义,可以作为文化遗产,也可以作为经过人类强烈改造的景观中接近自然的生物群落的残余。最近对摩洛哥圣地的植被进行了研究。关于它们的数量、空间格局或浮雕位置的信息是零碎的。然而,这些参数对于评价其作为生物避难所的作用和潜在自然植被的代表性是重要的。为此,通过地形图记录和实地考察,研究了摩洛哥西北部丹吉尔半岛圣地的密度和空间格局。他们的救济位置进行了检验,计算基于现场存在和随机伪缺席的逻辑回归模型。地面调查显示,大约67%的现存圣地被记录在地形图上。它们发生在整个研究区域,但聚集在聚落周围。虽然圣地倾向于出现在高地,但它们几乎可以在所有的地形位置找到,从而提供了支持不同类型顶极植被(气候顶极和pedoclimmax)的潜力。由于它们的丰富(每100平方公里约有29个圣地)和分布模式,它们可以作为退化景观中生物群落网络的组成部分。
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引用次数: 10
Structure and Process - Influence of Historical Agriculture of Linear Flow Paths by Extreme Rainfall in Brandenburg 结构与过程——勃兰登堡极端降雨对线性流道历史农业的影响
Q2 Environmental Science Pub Date : 2012-12-21 DOI: 10.3097/LO.201231
D. Deumlich
Long-term erosion forecast can completely misinterpret in extreme events in plain regions. Flow paths are well represented in the plain using digital elevation models in the 1-m grid (DEM1). The scale of the erosion process models and the elevation models is comparable. With it instruments are available to improve the erosion simulation. Simulations, based on (R)USLE family and bigger grid width, are relevant for regional overviews, to the clarification of small scale relevant linear erosion forms, however, unsuitably. The cross-slope tillage has intensified the water erosion in the examined case with special area morphology. From historical sources furrows of the ridge and furrow system were identified as runoff ways. Historical and actual information sources allowed the clarification of especially regional erosion events. Site specific and climatic factors as well as the actual land management caused a high damage magnitude in particular with extreme rainstorms, modified by historical land use structures.
在平原区极端事件中,长期侵蚀预报可能完全误读。在1米网格(DEM1)中使用数字高程模型很好地表示了平原中的流动路径。侵蚀过程模型和高程模型的尺度具有可比性。有了它,可以使用仪器来改进侵蚀模拟。基于(R)USLE族和更大网格宽度的模拟与区域概述相关,但不适合澄清小尺度相关的线性侵蚀形式。在具有特殊地形特征的样例中,坡间耕作加剧了水土流失。根据历史资料,山脊的沟槽和沟槽系统被确定为径流途径。历史和实际的信息来源使得特别是区域侵蚀事件得以澄清。具体的地点和气候因素以及实际的土地管理造成了很高的破坏程度,特别是极端暴雨,并受到历史土地利用结构的影响。
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引用次数: 5
Peninsula Effects on Birds in a Coastal Landscape: Are Coves More Species Rich than Lobes? 半岛对海岸景观中鸟类的影响:海湾比叶状区物种更丰富吗?
Q2 Environmental Science Pub Date : 2012-10-17 DOI: 10.3097/LO.201229
S. Riffell, B. Keas, T. Burton
Peninsula effects - decreasing richness with increasing distance along peninsula lobes - have been identified for many taxa on large peninsulas. Peninsula effects are caused by differences in colonization and extinction predicted by island biogeography or by environmental gradients along the peninsula. We compared species-area regressions for cove patches (i.e., mainland) to regressions for lobe patches (i.e., on peninsula tips) for wet meadow birds along a highly interdigitated shoreline (northern Lake Huron, USA). We conducted analysis both with and without accounting for variation in habitat and landscape characteristics (i.e., environmental gradients) of wet meadows. Species-area regressions for coves did not differ from lobes, nor did these results differ when we accounted for gradients. Similarly, few species were more abundant in coves. Peninsula effects may have been lacking because lobe patches were located ≈ 800 m on average from the mainland, and birds are highly mobile and can easily sample patches over these distances. One important caveat was that wet meadow patches > 5 ha were located in coves, so coves would still be important considerations in conservation plans because of the contribution of large patches to reproductive success, dispersal and population dynamics.
在大型半岛上,许多分类群都存在丰富度随距离增加而减少的半岛效应。半岛效应是由岛屿生物地理学或沿半岛的环境梯度预测的定殖和灭绝差异引起的。我们比较了沿高度交叉的海岸线(美国休伦湖北部)的湿草甸鸟类的湾斑块(即大陆)和叶斑块(即半岛尖端)的物种-面积回归。我们对湿草甸的生境和景观特征(即环境梯度)的变化进行了考虑和不考虑的分析。当我们考虑梯度时,凹形的物种-面积回归与裂片没有差异,这些结果也没有差异。同样,很少有物种在海湾中更丰富。半岛效应可能不存在,因为叶片分布在距离大陆平均约800米的地方,而鸟类的流动性很强,可以很容易地在这些距离上取样。一个重要的警告是,50公顷的湿草甸斑块位于海湾,因此海湾仍然是保护计划中的重要考虑因素,因为大斑块对繁殖成功,分散和种群动态的贡献。
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引用次数: 3
Impact of wild herbivorous mammals and birds on the altitudinal and northern treeline ecotones 野生草食性哺乳动物和鸟类对海拔和北部树线过渡带的影响
Q2 Environmental Science Pub Date : 2012-10-01 DOI: 10.3097/LO.201230
F. Holtmeier
Wild herbivorous mammals may damage treeline vegetation an cause soil erosion at a local scale. In many high mountain areas of Europe and North America, large numbers of red deer have become a threat to the maintenance of high-elevation forests and attempts to restore the climatic treeline. In northern Fennoscandia, overgrazing by reindeer in combination with mass outbreaks of the autumnal moth are influencing treeline dynamics. Moose are also increasingly involved damaging treeline forest. In the Alps, the re-introduction of ibex is causing local damage to subalpine forests and tree establishment above the forest limit as well as aggravating soil erosion. High-elevation forests and treeline in Europe are susceptible to the deleterious impact of wild ungulate populations because of former extensive pastoral use. Rodents may damage tree seedlings and saplings by girdling, root cutting, bark stripping and burrowing. Hares damage young trees by gnawing. Large numbers of small rodents may occasionally impede tree regeneration by depleting the seed sources. Rodents do not contribute to forest expansion beyond the current treeline. Among birds, nutcrackers are highly effective in influencing tree distribution patterns and treeline dynamics. Without the nutcracker caching of stone pine seeds any upward advance of the trees in response to climatic warming would be impossible. Some bird species such as black grouse, willow grouse and ptarmigan can impair tree growth by feeding on buds, catkins and fresh terminal shoots.
野生食草哺乳动物可能会破坏林木线植被,并在局部范围内造成土壤侵蚀。在欧洲和北美的许多高山地区,大量的马鹿对维持高海拔森林和恢复气候树线的努力构成了威胁。在芬诺斯坎迪亚北部,驯鹿的过度放牧加上秋蛾的大规模爆发正在影响林木线的动态。驼鹿也越来越多地破坏林木线。在阿尔卑斯地区,野山羊的重新引入对亚高山森林和超过森林限度的树木种植造成了局部破坏,并加剧了土壤侵蚀。欧洲的高海拔森林和林木线容易受到野生有蹄类动物种群的有害影响,因为它们以前被广泛地用于畜牧业。啮齿动物可能通过缠绕、割根、剥树皮和挖洞来破坏树苗和树苗。野兔啃咬幼树,损害幼树。大量的小啮齿动物偶尔会耗尽种子资源,从而阻碍树木的再生。啮齿类动物对目前林木线以外的森林扩张没有贡献。在鸟类中,胡桃夹子在影响树木分布模式和树线动态方面非常有效。如果没有胡桃夹子储存石松的种子,树木就不可能因气候变暖而向上生长。一些鸟类,如黑松鸡、柳松鸡和雷鸟,会以嫩芽、柳絮和新鲜的顶芽为食,从而损害树木的生长。
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引用次数: 18
Swiss Tree Lines – a GIS-Based Approximation 瑞士树线-基于gis的近似
Q2 Environmental Science Pub Date : 2012-09-01 DOI: 10.3097/LO.201228
E. Szerencsits
Mountain timber lines are relevant in the context of land abandonment and climate change. For Switzerland, GIS-compliant delimitations of the tree line and the forest line are still lacking. Recent high-resolution landcover information offers new possibilities for GIS-based approaches. In a Swiss-wide study, an analysis based on slope zones was combined with a moving-window analysis to assess tree and forest line altitude, using topographic data. The tree and the forest lines were delimited at the upper altitude reached by a tree or closed forest respectively. The model delivered a fine-scaled delimitation sensitive to local conditions. The results indicate that earlier studies underestimated the tree line altitudes for the fringes of the Alps. Also the variability inside climatic and bio-geographical regions is larger than it was estimated up to now.
山地木材线在土地废弃和气候变化的背景下是相关的。对于瑞士来说,仍然缺乏符合gis的树木线和森林线的划定。最近的高分辨率土地覆盖信息为基于地理信息系统的方法提供了新的可能性。在一项全瑞士范围的研究中,基于斜坡带的分析与移动窗口分析相结合,利用地形数据评估树木和森林线高度。树线和林线分别在乔木和闭林到达的较高海拔处划定。该模型提供了对当地条件敏感的精细划界。结果表明,早期的研究低估了阿尔卑斯山边缘的林木线高度。气候和生物地理区域内的变异也比目前估计的要大。
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引用次数: 14
Biorefineries: relocating biomass refineries to the rural area. 生物精炼厂:将生物质精炼厂迁往农村地区。
Q2 Environmental Science Pub Date : 2012-07-12 DOI: 10.3097/LO.201227
F. Papendiek, H. Ende, U. Steinhardt, H. Wiggering
T field for application of biomass is rising. The demand for food and feeding stuff rises while at the same time energy, chemicals and other materials also need to be produced from biomass because of decreasing fossil resources. However, the biorefinery ideas and concepts can help to use the limited renewable raw materials more efficiently than today. With biorefineries, valuable products, such as platform chemicals, can be produced from agricultural feedstock, which can subsequently be further processed into a variety of substances by the chemical industry. Due to the role they play as producers of biomass, rural areas will grow in importance in the decades to come. Parts of the biorefinery process can be relocated to the rural areas to bring a high added value to these regions. By refining biomass at the place of production, new economic opportunities may arise for agriculturists, and the industry gets high-grade pre-products. Additionally, an on-farm refining can increase the quality of the products because of the instant processing. To reduce competition with the food production and to find new possibilities of utilisation for these habitats, the focus for new agricultural biomass should be on grasslands. But also croplands can provide more renewable raw materials without endangering a sustainable agriculture, e.g. by implementing legumes in the crop rotation. To decide if a region can provide adequate amounts of raw material for a biorefinery, new raw material assessment procedures have to be developed. In doing so, involvement of farmers is inevitable to generate a reliable study of the biomass refinery potentials.
生物质的应用领域正在兴起。对食物和饲料的需求上升,同时由于化石资源的减少,能源、化学品和其他材料也需要从生物质中生产。然而,生物炼制的想法和概念可以帮助比现在更有效地利用有限的可再生原材料。利用生物精炼厂,可以从农业原料中生产出有价值的产品,例如平台化学品,这些产品随后可以由化学工业进一步加工成各种物质。由于它们作为生物质生产者的作用,农村地区在未来几十年将变得越来越重要。部分生物炼制过程可以转移到农村地区,为这些地区带来高附加值。通过在生产地点提炼生物质,可能会为农民带来新的经济机会,该行业也会获得高档的预制品。此外,由于即时加工,农场精炼可以提高产品的质量。为了减少与粮食生产的竞争,并找到利用这些栖息地的新可能性,新的农业生物质的重点应该放在草原上。但是,农田也可以在不危及可持续农业的情况下提供更多的可再生原料,例如通过在轮作中实施豆类。为了决定一个地区是否能够为生物精炼厂提供足够数量的原材料,必须制定新的原材料评估程序。在这样做时,农民的参与是不可避免的,以便对生物质精炼厂的潜力进行可靠的研究。
{"title":"Biorefineries: relocating biomass refineries to the rural area.","authors":"F. Papendiek, H. Ende, U. Steinhardt, H. Wiggering","doi":"10.3097/LO.201227","DOIUrl":"https://doi.org/10.3097/LO.201227","url":null,"abstract":"T field for application of biomass is rising. The demand for food and feeding stuff rises while at the same time energy, chemicals and other materials also need to be produced from biomass because of decreasing fossil resources. However, the biorefinery ideas and concepts can help to use the limited renewable raw materials more efficiently than today. With biorefineries, valuable products, such as platform chemicals, can be produced from agricultural feedstock, which can subsequently be further processed into a variety of substances by the chemical industry. Due to the role they play as producers of biomass, rural areas will grow in importance in the decades to come. Parts of the biorefinery process can be relocated to the rural areas to bring a high added value to these regions. By refining biomass at the place of production, new economic opportunities may arise for agriculturists, and the industry gets high-grade pre-products. Additionally, an on-farm refining can increase the quality of the products because of the instant processing. To reduce competition with the food production and to find new possibilities of utilisation for these habitats, the focus for new agricultural biomass should be on grasslands. But also croplands can provide more renewable raw materials without endangering a sustainable agriculture, e.g. by implementing legumes in the crop rotation. To decide if a region can provide adequate amounts of raw material for a biorefinery, new raw material assessment procedures have to be developed. In doing so, involvement of farmers is inevitable to generate a reliable study of the biomass refinery potentials.","PeriodicalId":38803,"journal":{"name":"Landscape Online","volume":"27 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2012-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69300468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Recent Glacier Recession – a New Source of Postglacial Treeline and Climate History in the Swedish Scandes 近期冰川衰退——瑞典斯堪的纳维亚冰川后树木线和气候历史的新来源
Q2 Environmental Science Pub Date : 2011-12-07 DOI: 10.3097/LO.201126
Lisa Öberg, L. Kullman
Climate warming during the past century has imposed recession of glaciers and perennial snow/ice patches along the entire Swedish Scandes. On the newly exposed forefields, subfossil wood remnants a ...
在过去的一个世纪里,气候变暖导致整个瑞典斯堪的纳维亚地区的冰川和常年积雪/冰原萎缩。在新暴露的前田,亚化石木材残留物…
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引用次数: 27
Landscape metrics as a tool for evaluating scenarios for flood prevention and nature conservation 景观指标作为评估防洪和自然保育方案的工具
Q2 Environmental Science Pub Date : 2011-05-24 DOI: 10.3097/LO.201125
S. Bianchin, Elke Richert, H. Heilmeier, M. Merta, C. Seidler
Within the framework of the project „Flood Prevention and Nature Conservation in the Weisseritz area“ („HochNatur“), a method including landscape metrics was developed and applied to assess and to compare different land use scenarios with regard to flood prevention and nature conservation. For the analysis, two sub-catchments strongly differing in land use within the Weisseritz catchment (Eastern Erzgebirge, Saxony, Germany) were selected. The first step of the evaluation procedure was a biotope assessment using three assessment criteria (naturalness, substitutability, rareness / endangerment). However, the biotope assessment did not yield any information about spatial distribution or the structural composition of the landscape. Therefore, landscape metrics were applied to analyse the structural and biotope type diversity at the landscape scale. Different landscape metrics (Shannon/Weaver diversity index, mean patch size index, Interdispersion/Juxtaposition index) and a weighting system were used to compare the different land use scenarios and the current state. The analysed catchment areas differ substantially in terms of their current state and potential measures regarding flood prevention and nature conservation depending on the location and distribution of biotope types. It was demonstrated that this method can be used for small catchment areas regardless of their land use for assessing, analysing and comparing different land use scenarios for a specific area.
在“Weisseritz地区的防洪和自然保护”(“HochNatur”)项目的框架内,开发了一种包括景观度量的方法,并应用于评估和比较有关防洪和自然保护的不同土地使用方案。为了进行分析,选择了Weisseritz流域(德国萨克森州东部Erzgebirge)内土地利用差异很大的两个子流域。评价程序的第一步是利用三个评价标准(自然性、可替代性、稀缺性/濒危性)对生物群落进行评价。然而,生物群落评估并没有提供任何关于空间分布或景观结构组成的信息。因此,在景观尺度上应用景观指标分析了结构多样性和生物群落类型多样性。采用不同的景观指标(Shannon/Weaver多样性指数、平均斑块大小指数、Interdispersion/并置指数)和加权系统对不同土地利用情景和现状进行了比较。所分析的集水区的现状,以及在防洪和自然保育方面可能采取的措施,因生物群落类型的位置和分布而有很大差异。结果表明,该方法可用于小型集水区,无论其土地利用情况如何,以评估、分析和比较特定地区的不同土地利用情景。
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引用次数: 10
The third and fourth dimensions of landscape: Towards conceptual models of topographically complex landscapes 景观的第三和第四个维度:走向地形复杂景观的概念模型
Q2 Environmental Science Pub Date : 2010-11-18 DOI: 10.3097/LO.201022
L. Drăguţ, U. Walz, T. Blaschke
Relating spatial patterns to ecological processes is one of the central goals of landscape ecology. The patch-corridor-matrix model and landscape metrics have been the predominant approach to describe the spatial arrangement of discrete elements (“patches”) for the last two decades. However, the widely used approach of using landscape metrics for characterizing categorical map patterns is connected with a number of problems. We aim at stimulating further developments in the field of the analysis of spatio-temporal landscape patterns by providing both a critical review of existing techniques and clarifying their pros and cons as well as demonstrating how to extent common approaches in landscape ecology (e.g. the patch-corridor-matrix model). The extension into the third dimension means adding information on the relief and height of vegetation, while the fourth dimension means the temporal, dynamic aspect of landscapes. The contribution is structured around three main topics: the third dimension of landscapes, the fourth dimension of landscapes, and spatial and temporal scales in landscape analysis. Based on the results of a symposium on this theme at the IALE conference in 2009 in Salzburg and a literature review we emphasize the need to add topographic information into evaluations of landscape structure, the appropriate consideration of scales; and to consider the ambiguity and even contradiction between landscape metrics.
将空间格局与生态过程联系起来是景观生态学的核心目标之一。在过去的二十年中,斑块-走廊-矩阵模型和景观度量一直是描述离散元素(“斑块”)空间排列的主要方法。然而,广泛使用的使用景观指标来表征分类地图模式的方法与许多问题有关。我们的目标是通过对现有技术的批判性回顾,阐明其优缺点,以及展示如何扩展景观生态学中的常用方法(例如斑块-走廊-矩阵模型),促进时空景观格局分析领域的进一步发展。扩展到第三维度意味着增加关于植被的起伏和高度的信息,而第四个维度意味着景观的时间和动态方面。该贡献围绕三个主要主题:景观的第三维度,景观的第四个维度,以及景观分析的时空尺度。基于2009年在萨尔茨堡举行的IALE会议上关于这一主题的研讨会的结果和文献综述,我们强调需要在景观结构评估中加入地形信息,适当考虑尺度;并考虑景观指标之间的歧义甚至矛盾。
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引用次数: 8
Landscape functions in a changing environment. 景观在不断变化的环境中发挥作用。
Q2 Environmental Science Pub Date : 2010-11-08 DOI: 10.3097/LO.201021
J. Bolliger, F. Kienast
Landscapes provide a broad range of services to society. To date, however, only few regional to continental scale studies assess the capacity of landscapes to provide these services under changing environmental conditions. This is required if the maintenance of current landscape multifunctionality remains a long-term goal. The presented mini review highlights and promotes the concept of landscape functions, defined as the capacity or potential of landscapes to provide services. Ultimately, spatially explicit landscape-function assessments may provide baseline information for society to engage in an open discussion on future landscape development and its potential impact on landscape character. Our mini review is supported with recent literature as well as insights gained at a symposium held at the IALE 2009 conference in Salzburg, Austria as well as a workshop held in Salzau, Germany 2010 and the Global Initiative of the The Ecosystem Services Partnership (http://www.fsd.nl/esp, 30. May 2010)
景观为社会提供了广泛的服务。然而,迄今为止,只有少数区域到大陆尺度的研究评估了景观在不断变化的环境条件下提供这些服务的能力。如果维持当前景观的多功能性仍然是一个长期目标,这是必要的。本迷你综述强调并推广了景观功能的概念,将其定义为景观提供服务的能力或潜力。最终,空间上明确的景观功能评估可以为社会提供基线信息,以参与未来景观发展及其对景观特征的潜在影响的公开讨论。我们的小型综述得到了近期文献的支持,以及2009年在奥地利萨尔茨堡举行的IALE会议、2010年在德国萨尔茨堡举行的研讨会和生态系统服务伙伴关系全球倡议(http://www.fsd.nl/esp, 30)所获得的见解。2010年5月)
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引用次数: 31
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