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1.
Conservation strategies for tropical species and habitats are decided largely on the basis of studies and examples made in the temperate regions, especially in North America and Europe. Conservation strategies for tropical species are often thought to fail due to a plethora of «human dimension» reasons. These reasons are external to the natural history and ecology of the target species, being due shortage of funds, education and awareness limits, and institutional corruption in several countries, particularly in the developing countries of Africa and Asia. Although these reasons are certainly important in determining the outcome of the conservation projects, herein we stress that there is a scientific ecological reason behind such failures in tropical ecosystems. Indeed, the ecological «entropy» of the species-rich and niche-packed tropical ecosystems is so much higher than that of North America and Europe that adopting a decision-making process based on relatively simplified (temperate) ecosystems, where a given species typically interacts with a few others, makes the eventual solution very simplistic or even «naive», thus enhancing its chances of failure. We urge that, for the future, conservation policies for tropical regions should be based on experiences designed from more realistic «highly-entropic» species-rich systems, also in the case of those species apparently sharing similar ecological roles as in the temperate regions. 相似文献
2.
DON BRENNEIS 《American anthropologist》2004,106(3):580-588
This address considers ethnographically a range of sites and practices central to sustaining the intellectual, pedagogical, professional, and public life of anthropology and related disciplines: research funding, human subjects review, scholarly publishing, program and personnel assessment, and intellectual property among them. The talk points to current practices of knowledge production and circulation in the United States and to the increasingly complex intersections among scholarly knowledge, managerialist language and practice, and private capital, intellectual and otherwise. It is meant to encourage serious ethnographic examination of the contexts within which anthropologists work, consideration of the potential consequences of these contemporary changes, and creative thought about the kinds of collegial and collective action that might be pursued to help sustain what we find to be of real value in the discipline and in our professional practice. 相似文献
3.
Rates of biogeochemical (microbial) processes of methane production and methane oxidation were determined in the bottom sediments and water column of the Black Sea. Aerobic bacterial oxidation of methane was confined to the upper 20–30 cm of Holocene bottom sediments of the shelf (0.7–259 ng C/(dm3 day)) and to oxygenated waters (0.2–45 ng C/(dm3 day)). In reduced sediments of the deep-sea zone and in the hydrogen sulfide–containing water column, considerable rates of anaerobic methane oxidation were recorded, comparable to or exceeding the rates of methane oxidation in oxygenated layers. From one-fourth to one-half of the methane formed in bottom sediments was oxidized immediately therein. The major part of the remaining methane was oxidized in the water column, and a smaller portion arrived in the atmosphere. 相似文献
4.
Anna Tsing Shiho Satsuka for the Matsutake Worlds Research Group 《Economic botany》2008,62(3):244-253
Diverging Understandings of Forest Management in Matsutake Science. As high-value gourmet mushrooms, the matsutake complex of the genus Tricholoma has been the subject of extensive research. This article reviews two trajectories of matsutake research, showing how distinctive
regional nodes may develop within a cosmopolitan modern science. The global center of matsutake research is in Japan, where
problems of artificial cultivation and the “orchard-style” enhancement of production under forest conditions stimulate basic
research. U.S. Pacific Northwest research forms a contrasting regional node, with a focus on sustainable yields in the context
of timber production. Regional differences in research design and results point to the importance of distinctive scientific
legacies, in this case formed in relation to divergent histories of forest management. Attention to regional distinctions
in the framing of scientific problems is particularly important as scientific frameworks are exported to new places; for example,
both Japanese and American forms of matsutake science have been extended to China.
高価なグルメきのこであるマツタケとその近縁種群のTricholoma属は広範囲に渡る科学的研究の対象となってきた。本論では二つの地域特徴的なマツタケ研究の軌跡を概観し、文化的差異を超えて世界的に通用する近代科学においても地域固有の関心に応じて特徴のある知識が結節し発展することを示す。マツタケ研究の世界的な中心地である日本では人工増殖やマツタケを殖やすための「果樹園的」な山林作りへの関心が基礎研究の方向性に刺激を与えてきた。一方日本とは対照的に、米国北西岸州では木材の持続的産出に主眼をおいた山林管理の流れの中で研究が進んできた。こうした研究計画や結果的に得られる知識の違いは、地域ごとに特徴のある科学的遺産
- 本件の場合は森林管理の歴史が多様に枝分かれしていること - に注目することが重要であることを知らせてくれる。近年日本や米国で発展したマツタケ研究の方法や成果が中国での研究にも影響を与えているが、特に新しい研究の場を広げる場合には科学的な関心、問題がどのような枠組で組み立てられるか地域によって多様であることを考慮することが重要である。 相似文献
5.
M. A. Salmanov 《Microbiology》2006,75(2):206-212
For the first time, microbiological monitoring was performed in the deepwater area of the Southern Caspian Sea. It revealed seasonal and interannual variations in total microbial content and concentrations of saprophytes and other physiological groups of bacteria in water and bottom sediments. The biomass, generation time, and bacterial production were determined. The most profound variations in microbial content, biomass, and production were found to occur in the water column and in bottom sediments at depths to 200–250 m. 相似文献
6.
Zuzanna B. Zagrodzka;Thomas F. Johnson;Andrew P. Beckerman; 《Ecology and evolution》2024,14(2):e10887
Harnessing science-based policy is key to addressing global challenges like the biodiversity and climate crises. Open research principles underpin effective science-based policy, but the uptake of these principles is likely constrained by the politicisation, commoditisation and conflicting motives of stakeholders in the research landscape. Here, using the mission and vision statements from 129 stakeholders from across the research landscape, we explore alignment in open research principles between stakeholders. We find poor alignment between stakeholders, largely focussed around journals, societies and funders, all of which have low open research language-use. We argue that this poor alignment stifles knowledge flow within the research landscape, ultimately limiting the mobilisation of impactful science-based policy. We offer recommendations on how the research landscape could embrace open research principles to accelerate societies' ability to solve global challenges. 相似文献
7.
A distinctive feature of ecological restoration is that the human presence in the natural landscape can be perceived as beneficial and not necessarily as harmful. Consequently, negotiations between heterogeneous actors involved and reactions to developments in different ecosystems become part of the scientific practice of restoration. This paper discusses some implications of restoration practice for the science of ecology in connection with recent debates about a new mode of knowledge production in science. I illustrate how different types of expertise from several backgrounds can be fed into each step of restoration implementation via alternate phases of selection and of corroboration by use to expose it to further observation in order to develop more scientifically and socially robust restoration strategies. 相似文献
8.
MARK E. LEDGER FRANCOIS K. EDWARDS LEE E. BROWN ALEXANDER M. MILNER GUY WOODWARD 《Global Change Biology》2011,17(7):2288-2297
Climate models predict widespread shifts in precipitation patterns and increases in the frequency of extreme events such as droughts, but consequences for key processes in affected ecosystems remains poorly understood. A 2‐year manipulative experiment used a series of stream mesocosms to test the effect of recurrent drought disturbance on the composition and secondary production of macroinvertebrate consumer assemblages and functional groups. On average, secondary production in drought‐disturbed communities (mean 4.5 g m?2 yr?1) was less than half of that that in controls (mean 10.4 g m?2 yr?1). The effects of the drought differed among functional feeding groups, with substantial declines for detritivore shredders (by 69%) and engulfing predators (by 94%). Contrasting responses were evident among taxa within most functional feeding groups, ranging from extirpation to irruptions in the case of several small midge larvae, but production of most species was suppressed. Taxon‐specific responses were related to body mass and voltinism. The ratio of production to biomass (community P/B) increased under drought, reflecting a shift in production from large long‐lived taxa to smaller taxa with faster life cycles. This research provides some of the first experimental evidence of the profound effects that droughts can have on both the structure and functioning of aquatic ecosystems. 相似文献
9.
H. Bandemer 《Biometrical journal. Biometrische Zeitschrift》1984,26(3):227-239
As a possible alternative to spectral analysis of biological processes the method of thresholding the recorded function is reconsidered. The frequencies of the section length for a finite set of levels form the frequency surface which is the starting point for inference and reasoning. The paper presents ideas and examples to stimulate the development and use of a suitable electronic equipment. 相似文献
10.
Bartomiej Grygorcewicz Rafa Rakoczy Marta Roszak Maciej Konopacki Marian Kordas Agnieszka Piegat Natalia Serwin Elbieta Cecerska-Hery Miroslawa El Fray Barbara Dogowska 《Current issues in molecular biology》2022,44(3):1316
Growing interest in bacteriophage research and use, especially as an alternative treatment option for multidrug-resistant bacterial infection, requires rapid development of production methods and strengthening of bacteriophage activities. Bacteriophage adsorption to host cells initiates the process of infection. The rotating magnetic field (RMF) is a promising biotechnological method for process intensification, especially for the intensification of micromixing and mass transfer. This study evaluates the use of RMF to enhance the infection process by influencing bacteriophage adsorption rate. The RMF exposition decreased the t50 and t75 of bacteriophages T4 on Escherichia coli cells and vb_SauM_A phages on Staphylococcus aureus cells. The T4 phage adsorption rate increased from 3.13 × 10−9 mL × min−1 to 1.64 × 10−8 mL × min−1. The adsorption rate of vb_SauM_A phages exposed to RMF increased from 4.94 × 10−9 mL × min−1 to 7.34 × 10−9 mL × min−1. Additionally, the phage T4 zeta potential changed under RMF from −11.1 ± 0.49 mV to −7.66 ± 0.29 for unexposed and RMF-exposed bacteriophages, respectively. 相似文献
11.
In this paper a flux-coupling model of photosynthesis is presented. By requiring minimum entropy production, it is found that the photosynthetic efficiency is essentially given by the square root of D/λ. D and λ are the diffusion coefficient and thermal conductivity of the rate-limiting processes in the chloroplast, respectively. For experimental values of D and λ, the efficiency is found to be 2.4–7.5%, with a likely value of 6.1%, whereas C4-plants are known to have an efficiency of 6.2%. We conclude that the process of photosynthesis is in quantitative agreement with the principle of minimum entropy production. 相似文献
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13.
《材料的重要性》是《景观设计理论》的一段节选。《景观设计理论》旨在不使用专业术语或其他领域假说的前提下,结合景观设计过程向学生介绍内在理论思想。《材料的重要性》是本书的五章之一。每一章针对特定理论,解释了其基础和来源,探讨了它对设计的重要性,列举了20—21世纪与其相关的设计案例,整理了该理论的辩论(尤其是有关现代和后现代思想),最后还有相关阅读材料清单和需要学生们思考的问题。本文分为如下3个部分:第一部分,物质性,介绍“辩证唯物主义”“媒介即信息”“物质实践”和“编码”等理论及其在设计中的运用;第二部分,通过“建构表达”“地貌代理人策略”“石材的面层”“材料的暗示”“人造,但不是伪造”等理论,介绍材料的真实性及其在设计中的运用;第三部分,复写理论及应用,包括“剩余物”“复写的展示性”“未来的复写”和“虚构的复写”等内容。 相似文献
14.
In democratic theory, “legitimacy” refers to the set of conditions that must be in place in order for the claims to authority of somebody to be deemed appropriate, and for their claims to compliance to be warranted. Though criteria of legitimacy have been elaborated in the context of democratic states, there is no reason for them not to be drawn up, with appropriate amendments, for other kinds of authority structures. This paper examines the claims to authority made over researchers by international bodies governing research ethics, who exercise their authority by the research ethics guidelines they produce (including recent revisions to the Declaration of Helsinki and CIOMS Guidelines). We argue that discussions of such bodies and sets of guidelines often elide questions of justification and questions of legitimacy, and that the grounds that might allow us to mount a strong case for the latter are at present sorely underdeveloped. 相似文献
15.
We present a method for comparing the survival functions of quality-adjusted lifetime from two treatments. This test statistic becomes the ordinary log-rank test when quality-adjusted lifetime is the same as the survival time. Simulation experiments are conducted to examine the behavior of our proposed test statistic under both null and alternative hypotheses. In addition, we apply our method to a breast cancer trial for comparing the distribution of quality-adjusted lifetime between two treatment regimes. 相似文献
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17.
Ethnicity is a frequently used measure in research into youth and sexuality in the Netherlands, a country known and admired for its favourable sexual health outcomes. This paper critically examines the production of knowledge about sexuality and ethnicity in the Netherlands. It traces the concept of ethnicity through four research practices (rationales of taking up ethnicity and compiling research populations; determining ethnicity; statistical calculations and making recommendations). It shows how the notion of ethnicity is flexible, slippery and changeable, yet at the same time becomes solidified and naturalized in relation to sexuality. The paper is based on a literature review of youth and sexuality in the Netherlands. 相似文献
18.
Abstract The Dutch have a long tradition of hospitality towards ethnic immigrants. In the nineties, however, quite dramatic changes have taken place among the Dutch. The central question addressed in this contribution is: to what extent do specific categories within the electorate favour ethnocentric policies? This question is answered by deducing hypotheses that are tested using recent data polled within the framework of the Dutch National Election Studies. Our crucial conclusion is that a rather widespread support for ethnocentric policies is present in contemporary Dutch society, especially among manual labourers, self‐employed and lowly educated people, but also among young cohorts and among modal income categories. 相似文献
19.
《生物信息学》课程教学模式探讨 总被引:1,自引:0,他引:1
在教学实践的基础上,结合生物信息学课程的学科特点,以及现代教育技术,就开设生物信息学课程的必要性及构建最合适的复合型教育模式展开了初步的探讨,为我国生物信息学课程的教学实施提供指导。随着时代的不断进步和发展,生物信息学的内涵也在不断扩大,包括生物信息学所涉及到的计算机基础知识、生物学基础知识、生物信息学研究领域、生物信息学应用领域等等。在生物信息学的教学实施过程中,将多个基础学科交叉融合是必备的,这不仅有助于增强学生对生物信息学科的了解,也对于学生在后续的生物信息学研究中起到了基石的作用。因此,如何将这些涉及范围广、涉及内容深的生物信息学基础课程恰当的传授给学生是教师们最需要考虑的问题,从而形成一套独特的教学体系,使生物信息学的教学工作更顺利,完整的进行下去。 相似文献
20.
国外生物技术产业发展政策研究 总被引:1,自引:0,他引:1
全球生物技术产业尚处于发展时期,政府的政策对技术的进步和产业的发展有明显的导向和促进作用。对美国、欧洲等国家和地区的产业政策进行综合研究,发现这些生物技术产业相对发达的国家和地区,尤其是美国,其产业政策已成体系,而且可操作性强,对产业的推动作用明显,具有相当的可借鉴意义。从组织管理结构、科研投入机制、鼓励研发创新、财税支持方式、资本市场培育、产业基地建设、中介服务网络构建、人才培养与引进、以及国际合作等方面对国际上行之有效的生物技术产业政策进行了归纳分析 。 相似文献