نتایج جستجو برای: mountains and valleys

تعداد نتایج: 16831168  

2018
Annik Schnitzler José Granado Olivier Putelat Rose-Marie Arbogast Dorothée Drucker Anna Eberhard Anja Schmutz Yuri Klaefiger Gérard Lang Walter Salzburger Joerg Schibler Angela Schlumbaum Hervé Bocherens

In north-eastern France, red deer (Cervus elaphus L.) populations were rebuilt from a few hundred individuals, which have subsisted in remote valleys of the Vosges mountains, and to a lesser extent from individuals escaped from private enclosures; at present times, this species occupies large areas, mainly in the Vosges Mountains. In this study, we examined the population dynamics of red deer i...

Journal: :ISPRS international journal of geo-information 2022

Since landforms composing land surface vary in their properties and appearance, shaded reliefs also present different visual impression of the terrain. In this work, we adapt a U-Net so that it can recognize selection segment We test efficiency 10 separate models apply an ensemble approach, where all are combined to potentially outperform single models. Our algorithm works particularly well for...

2007
Stephen D. Davis R. Brandon Pratt Frank W. Ewers Anna L. Jacobsen

A shift in chaparral species composition occurs from coastal to inland sites of the Santa Monica Mountains of southern California. Past studies have attributed this pattern to differential adaptations of chaparral species to gradients in moisture and solar radiation. We examined an alternate hypothesis, that shifts in species composition from coastal to inland sites is a result of differential ...

Journal: :SAGE Open 2021

As a very important plant resource, wood played varied and roles in the lives of ancient people. In present study, was discovered Yanghai cemetery Turpan Basin, which belonged to Subeixi culture (~1300BC–200AD). By using traditional classification techniques anatomy, four taxa wood, viz. Populus sp., Salix Picea as well Betula were identified. Woods Populus, Salix, mainly used for tomb construc...

Journal: :eco.mont-Journal on Protected Mountain Areas Research and Management 2022

Cuvier’s gazelle (Gazella cuvieri) and aoudad (Ammotragus lervia) are listed as Vulnerable in the IUCN red list, any population should be subject of scientific attention. Both ungulates were monitored for a year Nador Mountains (western Algeria). This is first record this part Tiaret province. species partly sympatric. However, was sighted only small numbers roughest valleys north. The larger...

Journal: :Land 2023

The karst of the horsts Bakony Region belonging to horst types different development is described. Horsts elevated summit position are characterised by most widespread and diverse karstification (with covered karst, cave-ins shafts). Cryptopeneplains affect position, but features also occur in their areas. On threshold surfaces marginal hypogene branches regional flow systems influenced spring ...

Journal: :Molecular ecology 2006
K E Mock R P Evans M Crawford B L Cardall S U Janecke M P Miller

The Utah sucker (Catostomus ardens) is endemic to the Bonneville Basin and the upper Snake River drainage in western North America, and is thought to hybridize with the federally endangered June sucker (Chasmistes liorus mictus) in Utah Lake (Bonneville Basin). Here we describe the discovery of a major subdivision in Utah suckers (4.5% mitochondrial sequence divergence) between the ancient Snak...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Kay D Bidle Sanghoon Lee David R Marchant Paul G Falkowski

Although the vast majority of ice that formed on the Antarctic continent over the past 34 million years has been lost to the oceans, pockets of ancient ice persist in the Dry Valleys of the Transantarctic Mountains. Here we report on the potential metabolic activity of microbes and the state of community DNA in ice derived from Mullins and upper Beacon Valleys. The minimum age of the former is ...

Journal: :The New phytologist 2011
Rui Wang Jin-Feng Wang Zhi-Jing Qiu Bin Meng Fang-Hao Wan Yin-Zheng Wang

• With growing concerns over serious ecological problems, a particular challenge is to reveal the complex mechanisms underlying rapid expansion of invasive species. Ageratina adenophora is of particular interest in addressing this question. • We used geographic information systems and logistic regression to identify the geographic and environmental factors contributing to the presence of A. ade...

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