نتایج جستجو برای: mrpp

تعداد نتایج: 49  

2009
Shelley Crausbay

Educators have long agreed that the ̳nature of science‘ (NOS) is an important aspect ofany science curriculum. However, exactly how to incorporate NOS into science curriculumremains contentious. We developed a new science course for non-science majors that used anexplicit-reflective approach, where NOS is purposefully combined with the process of scientificinquiry (SI) and o...

2012
N. HIGHTOWER John F. Weishampel Jessica N. Hightower

Human land use legacies have significant and long lasting impacts across landscapes. However, investigating the impacts of ancient land use legacies (>400 years) remains problematic due to the difficulty in detecting ancient land uses, especially those beneath dense canopies. The city of Caracol, one of the most important Maya archaeological sites in Belize, was abandoned after the collapse of ...

Forest roads can create small- scale climate change. These changes can vary with the road age and topographic conditions. This study aimed to identify ecological species group as well as study the relationship between vegetation and environmental factors based on the road age. The study was carried out in three-districts of Nav- Asalem in Watershed 7 of forests of North of Iran. Therefore, 140 ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1389

تحقیق حاضر معرفی فلور و تحلیل پوشش گیاهی منطقه شمال بادرود است که ساختار گونه ای و انواع جوامع گیاهی این منطقه را مورد بررسی قرار می دهد. در این تحقیق همچنین برخی از ویژگی های خاک همچون اسیدیته (ph)، هدایت الکتریکی (ec)، شوری و درصد رطوبت، همچنین ارتباط برخی متغیر های محیطی و گونه ای شامل درصد پوشش سنگریزه ای، درصد برهنگی خاک، ارتفاع، درصد پوشش گونه ای، غنای گونه ای، یکنواختی، چیرگی نسبی و تنوع...

2005
Shawna K. McMahon Mark A. Williams Peter J. Bottomley

decomposition (Smith et al., 1998), less is known about the interactions of substrate characteristics and microThe soluble fraction of ryegrass [Lolium perenne L. ssp. multibial decomposers during residue decomposition (Schiflorum (Lam.) Husnot.] straw comprises a major component of residue C and its presence or absence should influence the succession of mel, 1995). decomposer communities. Chan...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1393

هدف این تحقیق شناسایی جوامع¬گیاهی جنگل¬های شمشاد فریم (ساری) و تعیین مهم¬ترین ویژگیهای محیطی موثر در تفکیک جوامع مزبور در دو رویشگاه با ارتفاع کمتر و بیشتر از 1200 متر از سطح دریا است. برای این منظور تعداد 60 قطعه¬نمونه به صورت سیتماتیک - انتخابی با ابعاد شبکه شناور 200 و 400 متری به مساحت 400 متر مربعی با تاکید بر اصل توده معرف، در سطح منطقه پیاده شدند. در محل هر قطعه¬نمونه، فهرست و درصد تاج¬پ...

2014
Valentina R. Garbarino Joshua W. Campbell Joseph O'Brien Heather C. Proctor Bilal Dik Joseph O’Brien

Waterfowl, including ducks, geese, rails and others, are host to a great diversity of ectosymbiotic arthropods. In this study, we collected ectosymbionts from waterfowl and analyzed taxon richness and total abundance to determine whether there were differences in the mite and louse assemblages of waterfowl of different species, genera, sexes, and feeding behaviors. Data were collected from 53 i...

2003
Li Cai

The assessment of intercoder agreement in the unitizing phase of content analyses has long been overlooked. In particular, little attention has been paid to the issue of co-termination. Although multiple-coder kappa can be used for the purpose of summarizing the agreement of cotermination, its conservativeness often results in gross underestimates. A new family of coefficients based on Multi-re...

Journal: :Journal of Ecology 2021

Forests are important ecosystems that provide many ecosystem services. To humans, they an resource for food, firewood and timber (Jang et al., 2019). represent rich natural pharmacies containing species with known or potential medicinal nutritional value (Karjalainen 2009). In addition, harbour enormous number of different organisms, from microbes to large mammals (Barlow 2018). This is particu...

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