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51.
Jordan M. West Susan H. Julius Peter Kareiva Carolyn Enquist Joshua J. Lawler Brian Petersen Ayana E. Johnson M. Rebecca Shaw 《Environmental management》2009,44(6):1001-1021
Public lands and waters in the United States traditionally have been managed using frameworks and objectives that were established
under an implicit assumption of stable climatic conditions. However, projected climatic changes render this assumption invalid.
Here, we summarize general principles for management adaptations that have emerged from a major literature review. These general
principles cover many topics including: (1) how to assess climate impacts to ecosystem processes that are key to management
goals; (2) using management practices to support ecosystem resilience; (3) converting barriers that may inhibit management
responses into opportunities for successful implementation; and (4) promoting flexible decision making that takes into account
challenges of scale and thresholds. To date, the literature on management adaptations to climate change has mostly focused
on strategies for bolstering the resilience of ecosystems to persist in their current states. Yet in the longer term, it is
anticipated that climate change will push certain ecosystems and species beyond their capacity to recover. When managing to
support resilience becomes infeasible, adaptation may require more than simply changing management practices—it may require
changing management goals and managing transitions to new ecosystem states. After transitions have occurred, management will
again support resilience—this time for a new ecosystem state. Thus, successful management of natural resources in the context
of climate change will require recognition on the part of managers and decisions makers of the need to cycle between “managing
for resilience” and “managing for change.” 相似文献
52.
Julius Bartels 《Die Naturwissenschaften》1962,49(14):313-323
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Dr Iris Bartels Barbara Hoppe-Sievert Barbara Bockel Sabine Herold Julius Caesar 《黑龙江环境通报》1993,13(2):123-130
Serum levels of alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), and un-conjugated oestriol (uE3) were measured in serum samples of 4131 non-smoking and 1018 smoking women during the second trimester of pregnancy. The levels of all three analytes decreased with increasing body weight. The AFP median was significantly increased in smokers in a dose-response association; hCG decreased by 21 per cent and uE3 decreased by 3 per cent in smokers in a non-dose-related fashion. Regression functions for adjustment of serum levels for weight and smoking should be considered in risk estimation for Down syndrome in order to give a woman's individual risk more precisely. 相似文献
54.
Hakan Berg Julius Francis Petra Souter 《Ambio-人类环境杂志》2002,31(7):597-601
西印度洋(WIO)地区以其迷人的海岸带、丰富的海洋生物多样性以及富饶的海洋和海岸带资源而著称.但是地处WIO地区的许多国家像肯尼亚、莫桑比克、索马里、南非、坦桑尼亚、科摩罗、马达加斯加、毛里求斯、留尼旺、塞舌尔等却极度贫困,特别是近二三十年以来,该地区的环境退化现象以及自然资源和生物多样性的下降越来越明显. 相似文献
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West Jordan M. Courtney Catherine A. Hamilton Anna T. Parker Britt A. Julius Susan H. Hoffman Jennie Koltes Karen H. MacGowan Petra 《Environmental management》2017,59(1):102-117
Environmental Management - The interactive and cumulative impacts of climate change on natural resources such as coral reefs present numerous challenges for conservation planning and management.... 相似文献
58.
Jolien Schure Verina Ingram Julius Chupezi Tieguhong Cleto Ndikumagenge 《Resources Policy》2011,36(4):363-371
This paper examines the institutional framework of artisanal mining in the forests of the Sangha Tri-National Landscape (TNS) in the Congo Basin. Artisanal miners in Cameroon and the Central African Republic (CAR) commonly make sacrifices to their god of diamonds, to improve fortunes. This study looks into ‘the other forces’; institutions that play a role in shaping the sector and its outcomes. These institutions comprise formal and informal institutions at a local, national, regional and international level. Although artisanal miners in TNS benefit by gaining cash income, this activity also carries risks as income is highly disparate and environmental impacts in this priority forest conservation area are expected to increase due to the growing competition over land use. It was concluded from a literature review, interviews and site visits that informal arrangements dominate the sector, especially in Cameroon, leading to poor relations between officials and miners and meaning that miners have few rights and no voice. The current institutional setup is inadequate to deal with current and anticipated social and environmental issues. Future interventions need to take into account the existing (local) types of organization, vulnerable groups, the interests of multiple actors and the fact that most miners are experienced but combine mining with other activities, such as agriculture, fishing and harvesting forest products. African initiatives concerning ASM offer opportunities to Cameroon and CAR to collaborate with other countries to combat similar issues. A regional integrated approach of both the forest and mining sector would be especially relevant for trans-boundary agreements, such as concerning the TNS, to reinforce positive outcomes for the landscape and the area's population. 相似文献
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