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位于长江上游的金沙江流域,是典型的生态脆弱带和长江流域中水土流失最为严重、地方经济最贫困的地区,同时也是云南省实施西部大开发战略,进行生态建设的重点区域[1].金沙江流域生态建设决策支持系统是政府及有关部门进行金沙江流域生态建设管理的科学依据和相关技术支撑.由于金沙江流域的复杂性和生态建设的多元性,以及政府对决策支持要求的系统性、准确性和可操作性.系统要求能够准确反应流域生态和建设的主要因子,突出流域生态建设的静态与动态的双重特性.因此,在系统的设计和建设过程中,对数据库的设计、数据的采集,正确衡量和评价流域内各不同区域的生态建设状况和存在的主要问题,以及决策支持的模型设计和参数选择等一系列的问题,都需要有明确的界定和标准.因此,与传统的指标体系研究不同[3,4],金沙江流域生态建设决策支持系统指标体系在确定系统的结构和功能中具有瓶颈的作用.  相似文献   

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The integration of the social sciences into long-term ecological research is an urgent priority. To address this need, a group of social, earth, and life scientists associated with the National Science Foundations (NSF) Long-Term Ecological Research (LTER) Network have articulated a conceptual framework for understanding the human dimensions of ecological change for the LTER Network. This framework explicitly advocates that what is often divided into natural and human systems be considered a single, complex social-ecological system (SES). In this paper, we propose a list of core social science research areas, concepts, and questions; identify the need for multiscale investigatory frameworks crucial for implementing integrated research; and suggest practical approaches for integration. In sum, this paper is a general outline for empirical and cross-site research projects where investigators agree that bringing together social, biological, and earth scientists can lead to synthetic approaches and a unified understanding of the mechanisms regulating SES. Although the motivation for this goal is specific to the LTER Network and similar projects, we believe that the issues and ideas presented here are widely applicable to other interdisciplinary SES studies.  相似文献   

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ABSTRACT

The aim of this study was to understand parents' perspectives on how children and adolescents with autism spectrum disorders (ASD) benefit from a relationship with companion animals. Parents were invited to participate in focus-group discussions. One open-ended question with follow-up questions was asked and the parents' responses were subsequently categorized. Three main themes emerged: the quality of the relationship with the companion animal; increased interaction with people; and optimization of the child's function and development. The results show that companion animals can contribute to social and behavioral development support, and improved mental health and quality of life. The children's and adolescents' interests and activities with companion animals were more social than nonsocial and of different quality than the restricted and repetitive activities in which children with ASD are normally engaged. Our findings describe a complementary developmental support for this vulnerable group of children and adolescents, which give them possibilities for expanded social contacts, diminished anxiety and depression, and facilitated learning.  相似文献   

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Biogeography has been difficult to apply as a methodological approach because organismic biology is incomplete at levels where the process of formulating comparisons and analogies is complex. The study of insect biogeography became necessary because insects possess numerous evolutionary traits and play an important role as pollinators. Among insects, the euglossine bees, or orchid bees, attract interest because the study of their biology allows us to explain important steps in the evolution of social behavior and many other adaptive tradeoffs. We analyzed the distribution of morphological characteristics in Colombian orchid bees from an ecological perspective. The aim of this study was to observe the distribution of these attributes on a regional basis. Data corresponding to Colombian euglossine species were ordered with a correspondence analysis and with subsequent hierarchical clustering. Later, and based on community proprieties, we compared the resulting hierarchical model with the collection localities to seek to identify a biogeographic classification pattern. From this analysis, we derived a model that classifies the territory of Colombia into 11 biogeographic units or natural clusters. Ecological assumptions in concordance with the derived classification levels suggest that species characteristics associated with flight performance, nectar uptake, and social behavior are the factors that served to produce the current geographical structure.  相似文献   

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Pampanini于1910年发表了桔梗科采自湖北西部的一个新种Codonopsis draco。此后100年无人提起它。最近作者在进行党参属及其近缘类群的专著研究中发现它就是1984年发表的刺萼参Echinocodon lobophyllus DY. Hong, 也采自湖北西部。本文作了新组合。刺萼参在湖北郧西的分布点已经消失,至今仅知道陕西东南部两个地点有少量植株,可见刺萼参已处于濒危状态。因为它是单种属,对其保护应予特别关注。  相似文献   

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Brachaspis robustus is an endangeredgrasshopper endemic to South Island, NewZealand. It is both rare and localised;occupying low altitude floodplain terraces andbraided riverbeds of the Mackenzie Basin. Thisis in stark contrast to the two other speciesin this genus (B. nivalis and B.collinus) which occupy montane habitats.Mitochondrial and nuclear sequence data wereemployed to explore genetic diversity andphylogenetic relationships of populations ofBrachaspis with a view to establishingthe status of B. robustus. Molecularevidence indicates that Brachaspisprobably radiated during the Pliocene and thatdivisions within the genus relate more tospatial distribution developed during thePleistocene than to ecology. The mitochondrial(Cytochrome oxidase I) and nuclear (ITS)sequence data indicate that Brachaspisnivalis is divided into northern and southernpopulations. The northern clade is furthersubdivided geographically. The southern cladecomprises alpine populations of B.nivalis and includes the lowland B.robustus. Additionally, it is observed thatsome morphological features previously thoughtto be specific to B. robustus also occurin members of the southern B. nivalisclade. It is suggested that the taxon B.robustus should include all of the southernBrachaspis populations. But it is arguedthat the absence of genetic evidencedistinguishing the endangered population doesnot preclude it from conservation effort. Acombination of morphological and habitatpeculiarities indicate that the survival ofB. robustus (sensu lato) isimportant to the maintenance of diversity.  相似文献   

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Background

Health literacy refers to personal competencies for the access to, understanding of, appraisal of and application of health information in order to make sound decisions in everyday life. The aim of this study was to develop and evaluate the psychometric properties of an instrument for the measurement of health literacy among adolescents (the Health Literacy Measure for Adolescents-HELMA).

Methods

This study was made up of two phases, qualitative and quantitative, which were carried out in 2012–2014 in Tehran, Iran. In the qualitative part of the study, in-depth interviews with 67 adolescents aged 15–18 were carried out in 4 high schools to generate the initial item pool for the survey. The content validity of the items was then assessed by an expert panel review (n = 13) and face validity was assessed by interviewing adolescents (n = 16). In the quantitative part of the study, in order to describe the psychometric properties of the scale, validity, reliability (internal consistency and test-retest) and factor analysis were assessed.

Results

An item pool made up of 104 items was generated at the qualitative stage. After content validity was considered, this decreased to 47 items. In the quantitative stage, 582 adolescents aged 15–18 participated in the study with a mean age of 16.2 years. 51.2% of participants were females. In principal component factor analysis, 8 factors were loaded, which accounted for 53.37% of the variance observed. Reliability has been approved by α = 0.93 and the test-retest of the scale at two-week intervals indicated an appropriate stability for the scale (ICC = 0.93). The final questionnaire was approved with 44 items split into eight sections. The sections were titled: gain access to, reading, understanding, appraise, use, communication, self-efficacy and numeracy.

Conclusion

The Health Literacy Measure for Adolescents (HELMA) is a valid and reliable tool for the measurement of the health literacy of adolescents aged 15–18 and can be used to evaluate different levels of functional, interactive, and critical health literacy in adolescents.  相似文献   

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Arundinaria macclureana是在现代植物学中根据在西藏采集的标本描述的第一个竹子。其模式标本是1938年采集的,但只有花枝,没有地下茎、秆箨等重要特征。尽管如此,该种还成为了新属Borinda的模式种。在研究了其模式标本后,使本文第一作者联想起1991年在藏东南采集的西藏箭竹(Fargesia setosa)。西藏箭竹的模式标本采集于1977年,但只有营养体,没有花枝。在对比研究两个名称的模式后,确认二者实为同种。经与共同作者一起讨论,认为其正确学名为Fargesia macclureana,但该种所在的筱竹属群的关系还有待进一步的研究。  相似文献   

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Arundinaria macclureana 是在现代植物学中根据在西藏采集的标本描述的第一个竹子。其模式标本是
1938 年采集的, 但只有花枝, 没有地下茎、秆箨等重要特征。尽管如此, 该种还成为了新属Borinda 的模
式种。在研究了其模式标本后, 使本文第一作者联想起1991 年在藏东南采集的西藏箭竹( Fargesia setosa) 。
西藏箭竹的模式标本采集于1977 年, 但只有营养体, 没有花枝。在对比研究两个名称的模式后, 确认二
者实为同种。经与共同作者一起讨论, 认为其正确学名为Fargesia macclureana, 但该种所在的筱竹属群的
关系还有待进一步的研究。  相似文献   

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Arundinaria macclureana Bor was the first bamboo described in modern taxonomy based on Tibetan material. Since the type bears only flowering branches without critical vegetative characteristics such as rhizomes and culm- sheaths, its identity has long been doubtful. Even so, it provides the type of a newly created genus, Borinda. By checking the type specimens of A1 macclureana as well as the type of Fargesia setosa T. P. Yi, which is a species only known by its vegetative state, and by collecting in the field, a conclusion is reached that these two entities are conspecific. Fargesia macclureana, a name published in less- received literature is the correct name for this endemic Tibetan bamboo, although re- evaluation of the relationships within the Thamnocalamus group is needed.  相似文献   

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Ecological imagery among the Upper Amazonian Canelos Quichua native peoples of eastern Ecuador provides a paradigmatic, symbolic template organized by sets of cosmological premises. This template, anchored by traditional shamanism and ceramic manufacture, is invoked in emotionally charged ceremonial and juropolitical contexts to express resistance to normative culture bearers who have a potential or real impact on the ecosystem and indigenous political economy. The imagery is described as it exists within a system of radical change. Mechanisms are discussed whereby ecosystem knowledge and social structure are systemically linked to cosmological premises within a dynamic system of indigenous cultural adaptability . [Ecuador, symbolism of Canelos Quichua, Amazonian cosmology, cultural adaptability, ecological imagery]  相似文献   

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The relationship between the insect development rate and temperature was established very early and represents an important ecological variable for modeling the population dynamics of insects. The accurate determination of thermal constant values and the lower and upper developmental thresholds of Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae) on fennel (Foeniculum vulgare Miller (Apiales: Apiaceae)) crops would obviously benefit the effective application of control measures. This paper is a study of the biology and thermal requirements of H. foeniculi. Winged insects were collected from fennel crops at the Embrapa Algodão in Campina Grande, Paraíba. Nymphs (age ≤24 h) produced by winged insects were subjected to constant temperatures of 15, 20, 25, 28, 30 or 33°C, a photophase of 12 h and a relative humidity of 70±10%. The results of the study showed that at temperatures between 15 and 30°C, H. foeniculi nymphs were able to develop normally. The four instars were found at all temperatures tested. However, temperatures of 3 and 33°C were lethal to the nymphs. The nymph stage development time varied from 5 (30°C) to 19 (15°C) days. The influence of temperature on the development time is dependent on the instar. The base temperature (Tb) and the thermal constant (K) for the nymph stage were estimated at 11.2°C and 107.5 degree-days, respectively. The shortest nymph development stage was observed at 30°C, and the highest nymph viability (85.0%) was observed at 28°C. This information can be used for developing phenological models based on the temperature and development rate relationships so that outbreaks of H. foeniculi in the fennel crop can be predicted, therefore improving the application of control programs targeting this fennel pest.  相似文献   

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