نتایج جستجو برای: forest range

تعداد نتایج: 766089  

2014
Katrin Kubiczek Swen C. Renner Stefan M. Böhm Elisabeth K.V. Kalko Konstans Wells

The partitioning of production forests into discretely managed forest stands confronts animals with diversity in forest attributes at scales from point-level tree assemblages to distinct forest patches and range-level forest cover. We have investigated the movement and ranging patterns of male Common Chaffinches, Fringilla coelebs, in heterogeneous forest production landscapes during spring and...

2006
G. A. Mendoza H. Martins

The broad range of applications of Multi-Criteria Decision Analysis (MCDA) to forest management has demonstrated its potential as an interdisciplinary methodological framework for decision-making. However, traditional MCDA methods have also shown to have some limitations in addressing the inherent complexity of forest resources management and planning problems. This is particularly true in sust...

2013
Jinliang Wang Yan Gao Xiaohua Wang Lei Fu

Forest texture is an intrinsic characteristic and an important visual feature of a forest ecological system. Full utilization of forest texture will be a great help in increasing the accuracy of forest classification based on remote sensed data. Taking Shangri-La as a study area, forest classification has been based on the texture. The results show that: (1) From the texture abundance, texture ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم پایه 1390

چکیده: برش مورد مطالعه در 15 کیلومتری جاده ایلام به سمت مهران در منطقه ای تحت عنوان تنگ گراب قرار دارد. سازند گورپی متشکل از سنگهای نرم و تیره رنگ و لیتولوژی نرم بر روی سازند ایلام با سنگهای آهکی سخت و به رنگ سفید و نخودی قرار دارد. در این مطالعه تعداد 51 گونه متعلق به 23 جنس از فرامینیفرهای پلانکتونیک شناسایی و محدوده ی حضور آنها در برش مورد مطالعه تعیین شد. بر این اساس این سازند به 12 بایوزو...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Harini Nagendra

Tropical forest habitat continues to decline globally, with serious negative consequences for environmental sustainability. The small mountain country of Nepal provides an excellent context in which to examine trajectories of forest-cover change. Despite having experienced large-scale forest clearing in the past, significant reforestation has taken place in recent years. The range of biophysica...

2014
John W. Coulston Gregory A. Reams David N. Wear Kenneth Brewer

Quantifying the amount of forest and change in the amount of forest are key to ensure that appropriate management practices and policies are in place to maintain the array of ecosystem services provided by forests. There are a range of analytical techniques and data available to estimate these forest parameters, however, not all ‘forest’ is the same and various components of change have been pr...

2010
C. L. Ping G. J. Michaelson E. S. Kane C. A. Stiles D. K. Swanson N. D. Zaman

969 Soil Sci. Soc. Am. J. 74:969–978 Published online 17 Mar. 2010 doi:10.2136/sssaj2009.0152 SNRAS Publ. no. 2009-001. Received 22 Apr. 2009. *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanica...

2008
Keith Christenson Donald McFarlane

A range extension for Hahn’s short-tailed fruit bat, Carollia subrufa, is reported which extends the distribution of the species from the Pacific Dry Forest into the Pacific Moist Forest ecoregion. This raises the possibility that the species may be more widely distributed in Costa Rica than currently supposed, adding almost 30,000 km of potential range.

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