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11篇 您的检索式:作者名="Susan DR"
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1Silvicultural alternatives to conventional even-aged forest man-agement-what limits global adoption?显示文摘Background: The development of forestry as a scientific and management discipline over the last two centuries has mainly emphasized intensive management operations focused on increased commodity production, mostly wood. This 'conventional' forest management approach has typically favored production of even-aged, single-species stands. While alternative management regimes have generally received less attention, this has been changing over the last three decades, especially in countries with developed economies. Reasons for this change include a combination of new information and concerns about the ecological consequences of intensive forestry practices and a willingness on the part of many forest owners and society to embrace a wider set of management objectives. Alternative silvicultural approaches are characterized by a set of fundamental principles, including avoidance of clearcutting, an emphasis on structural diversity and small-scale variability, deployment of mixed species with natural regeneration,and avoidance of intensive site-preparation methods.Methods: Our compilation of the authors' experiences and perspectives from various parts of the world aims to initiate a larger discussion concerning the constraints to and the potential of adopting alternative silvicultural practices.Results: The results suggest that a wider adoption of alternative silvicultural practices is currently hindered by a suite of ecological, economic, logistical, informational, cultural, and historical constraints. Individual contexts display their own unique combinations and relative significance of these constraints, and accordingly, targeted efforts, such as regulations and incentives, may help to overcome specific challenges.Conclusions: In a broader context, we propose that less emphases on strict applications of principles and on stand structures might provide additional flexibility and facilitate the adoption of alternative silvicultural regimes in a broader set of circumstances. At the same time, the acceptance of alternative silvicultural systems as the 'preferred or default mode of management' wil necessitate and benefit from the continued development of the scientific basis and valuation of a variety of ecosystem goods and services. This publication is aimed to further the discussion in this context.Klaus J Puettmann Scott McG Wilson Susan C Baker Pablo J Donoso Lars Dr?ssler Girma Amente Brian D Harvey Thomas Knoke Yuanchang Lu Susanna Nocentini Francis E Putz Toshiya Yoshida Jürgen Bauhus 2015Forest Ecosystems2015,2,2:4
2Variable protection of 1332 integrin deficient miee from thrombosis initiated by different mecha- nisms显示文摘Susan SS Emane DR Heikki V 2001Blood2001,98,4:1
3Thrombophilia and hypercoagulation:risk assessment and screening显示文摘Vanessa RB-G Susan DR 2012J Nurse Pract2012,8,8:1
4In vivo differentiation po- tential of tracheal basal cells: evidence for multipotent and unipo-tent subpopulations 显示文摘Kyung UH Susan DR Simon W 2003Am J Physiol Lung Cell Mol Physiol2003,286,4:1
5Disinfection by-products and other emerging contaminants in drinking water显示文摘Susan DR 2003Trends Analyt Chem2003,22,10:1
6Occurrence, genotoxici- ty, and carcinogenicity of regulated and emerging disinfection by- products in drinking water:a review and roadmap for research显示文摘Susan DR Michael J Elizabeth DW 2007Mutation Research2007,636,:1
7Variable protection of β3-integrin-deficient mice from thrombosis initiated by different mechanisms显示文摘Susan SS Ernane DR Heikki V 2001Blood2001,98,4:1
8Evalution of new vaccines in the mouse and guinea pig model of tuberculosis显示文摘SUSAN L CELINE D'S ALAN DR 1998Infect Immun1998,66,:1
9A post-1990s assessment of strategic hospital alliances and their marketplace orientations-time to refocus显示文摘Peter CO Susan DR Roice DL 2002Health Care Manag Rev2002,27,2:1
10Occurrence of a new generation of disinfection byproducts显示文摘Stuart WK Howard SW Susan DR 2006Environ Sci Technol2006,40,23:1
11Depressive symptoms and menopausal burden in the midlife显示文摘Susan DR Evette JL Katherine MN 2009Maturitas2009,62,3:1
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