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  • 2005-2009  (949)
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  • 2005  (467)
  • 1
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    More effective purifying selection on RNA viruses than in DNA viruses (2007)
    Elsevier
    Details
    Publikationsdatum: 2007-12-01
    Print ISSN: 0378-1119
    Digitale ISSN: 1879-0038
    Thema: Biologie
    Publiziert von Elsevier
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 2
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    Global Ground Truth Validation of GRACE Gravity Measurements by Ocean Bottom Pressure (2007)
    In:  EPIC3European Geosciences Union General Assembly 2007, Vienna, Austria 20 April 2007., 15
    Details
    Publikationsdatum: 2019-07-16
    Beschreibung: The GRACE satellite mission observes the gravity field of the Earth with unprecedented accuracy. Gravity field products provided by the GRACE Science Data System allow to assess both the static geoid, as well as time-varying signals associated with changes of global water mass distribution. For estimating the capability of spaceborne gravity measurements to detect the temporal variability of oceanic mass distribution and currents, the GRACE data is validated against in-situ measurements of ocean bottom pressure (OBP) provided by Pressure Sensors located at the sea floor.In the framework of a joint BMBF (German Ministry for Education and Research) project, a database that includes globally available OBP observations is presented here. This database is used to carry out a comprehensive ground-truth validation of GRACE. The capability of GRACE solutions from different analysis centers to capture oceanic mass variability is assessed by comparisons with in-situ OBP data from the Southern Ocean, Atlantic, Indian and Pacific Oceans. It is shown, that GRACE detects real oceanic variability in regions with a high signal-to-noise ratio (e.g. the Antarctic Circumpolar Current), and that reduced noise levels of more recent GRACEsolutions may improve GRACE performance in other parts of the Ocean (e.g. the tropical Atlantic). The ground-truth validation against OBP aids the further improvement of GRACE data processing that in the future GRACE may be used to monitor geostrophic transport variability and water mass changes on a global scale.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Conference , notRev
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 3
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    Integrating Conservation and Development Experience: A Review and Bibliography of the ICDP Literature (2005)
    London: International Institute for Environment and Development
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: This literature review aims to investigate local perceptions of the success or failure of Integrated Conservation and Development Projects (ICDPs). It reviews existing information on ICDPs to take stock of experience to date and to explore the key problems and lessons learned. The document begins a process of drawing together information on ICDP policy and practice. It also aims to steer planners, policy makers and practitioners through the existing literature. The information presented highlights key points emerging from a desk review of published and ‘grey’ literature relating to ICDP policy and practice. The bibliography does not aim to be comprehensive but rather indicative of the literature that is currently available. In the course of the review, distinguishing between literature of direct and indirect relevance to the policy and practice of ICDPs often proved difficult. In part, this is because there is no universally accepted definition, which specifies what an ICDP is, and what an ICDP is not. The literature selected for this review focuses as far as possible on issues related specifically to ICDP policy and practice. However, some more general literature is included, but only where we believe the contents provide useful insights of direct relevance to the overall purpose of the review
    Beschreibung: Published
    Schlagwort(e): Development projects ; Conservation
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed
    Format: 189525 bytes
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 4
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    Agriculture And Savannah Biodiversity Loss (2005)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: This paper investigates the question of what influence human beings have had on biodiversity in the region of KwaZulu-Natal in South Africa. A historical analysis has been made of human impact on local ecosystems and species accompanied by statistics on the reduction of habitats and systems caused by urbanisation, cultivation, silviculture and state dams. The major causes of biodiversity loss are identified as being habitat destruction or modification and extractive utilisation. The most important problem is that the government of South Africa does not have an effective environmental management system to ensure wise decision-making. The result has been sectoral ministries empowered with the dual role of both exploiting and preserving natural resources. In 1989 guidelines for Integrated Environmental Management were produced by the Department of Environmental Affairs with an environmental impact assessment procedure. However, the procedure is weak because cumulative and synergistic impacts of development are poorly considered, because the land-use planning framework at the regional and even subregional scale is incomplete, and because there is generally poor understanding of how various land-uses impact on biodiversity. What is more, the procedure hasn't been given force of law due to the worry that the country cannot afford expensive assessment procedures when economic growth is the priority.
    Beschreibung: Published
    Schlagwort(e): Ecological balance ; Environmental impact assessment ; Biodiversity
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed
    Format: 73293 bytes
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 5
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    Vulnerability of Water Resources to Environmental Change in Southern Africa. A report for the Pan African START Secretariat and UNEP. (2005)
    Council for Scientific and Industrial Research
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: The availability and access to water strongly influences patterns of economic growth and social development (Alan, 2002). In this regard, the Southern African region faces considerable challenges in meeting the social and economic needs of its populations (Hirji et al., 2002). It has become increasingly important that water resource development takes place in the context of integrated water resource management (IWRM) with its main principles of equity (regarding access), efficiency (economic) and sustainability (environment).
    Beschreibung: Published
    Schlagwort(e): Environmental conditions ; Climatic change ; Water resources
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed
    Format: 3099370 bytes
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 6
    Digitale Medien
    Digitale Medien
    Editorial (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of consumer studies 29 (2005), S. 0 
    Details
    ISSN: 1470-6431
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1470-6431.2005.00430.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Consumer Support Networks: assessment of need for consumer information and advice service (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of consumer studies 29 (2005), S. 0 
    Details
    ISSN: 1470-6431
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: Research evidence suggests that UK consumers are facing significant problems with goods and services and are in need of information and advice to avoid or redress such situations. Consumers are not always aware of their rights nor where they can access consumer advice services. In 2000, the Department of Trade and Industry launched the Consumer Support Network (CSN) programme in Great Britain to improve consumer access to expert, accurate and timely advice. One challenge faced by these Networks and many other agencies is to assess the needs of consumers for consumer information and advice services. A needs assessment is required as a key element in the effective planning and development of services in each Network at a local level. The focus of the needs assessment at the local level is to encourage Networks to consider suitable solutions to meet the needs of people in their communities. This paper provides a review of the development of Consumer Support Networks in Great Britain and discusses the importance of needs assessment to service providers such as CSNs and other agencies. It reveals the complexity associated with conducting effective needs assessments including the various aspects of needs, consumer segmentation and characteristics of consumer information and advice. Further research is being carried out at Queen Margaret University College, UK, with a view to the development of a scientific model for the assessment of need for consumer information and advice services.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1470-6431.2004.00421.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Are populations of mayflies living in adjacent fish and fishless streams genetically differentiated? (2005)
    Oxford, UK : Blackwell Science Ltd
    Freshwater biology 50 (2005), S. 0 
    Details
    ISSN: 1365-2427
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: 1. Conspecific populations living in habitats with different risks of predation often show phenotypic variation in defensive traits. Traits of two species of mayflies (Baetidae: Baetis bicaudatus and Baetis sp. nov.) differ between populations living in fish and fishless streams in a high altitude drainage basin in western Colorado, U.S.A. We tested for genetic differentiation between mayfly populations in these two habitat types, assuming that lack of genetic differentiation would be consistent with the hypothesis that those traits are phenotypically plastic.2. Previous work has shown that larvae of both species behave differently and undergo different developmental pathways in adjacent fish and fishless streams. These phenotypic differences in behaviour and development have been induced experimentally, suggesting that populations from fishless streams have the genetic capability to respond to fish.3. During summer 2001 we collected Baetis larvae from several fish and fishless streams, and from fish and fishless sections of the same streams. We used allozymes and a fragment of the cytochrome oxidase subunit 1 mitochondrial gene to examine genetic variation of Baetis individuals within and among streams.4. Results showed that genetic variation exists among populations of the same species of Baetis from different streams, but none of that variation was associated with the presence or absence of fish. These data confirm that populations of Baetis living in fish and fishless streams are not genetically distinct, and are consistent with the hypothesis that traits associated with environments of different risk are phenotypically plastic.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2427.2004.01292.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 9
    Digitale Medien
    Digitale Medien
    Spatial patterns of genetic structure among populations of a stone-cased caddis (Trichoptera: Tasimiidae) in south-east Queensland, Australia (2005)
    Oxford, UK : Blackwell Science Ltd
    Freshwater biology 50 (2005), S. 0 
    Details
    ISSN: 1365-2427
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: 1. Gene flow and dispersal among populations of a stone-cased caddis (Tasimiidae: Tasimia palpata) were estimated indirectly using a 460 bp region of the cytochrome oxidase I gene of mitochondrial DNA.2. There was no significant differentiation at the largest spatial scale (between catchments) and no correlation between genetic distance and geographic distance. These results are consistent with widespread adult dispersal.3. Conversely, significant genetic differentiation was detected at the smallest spatial scale examined (among reaches within streams). This pattern was primarily because of significant FST values in a single stream (Bundaroo Creek).4. Bundaroo Creek also had the lowest mean number of haplotypes per population (n = 7) suggesting that a limited number of females may be responsible for recruitment at these sites. Significant FST's at the reach scale may be a result of this ‘patchy’ recruitment. However, additional evidence regarding the long-range dispersal ability and fecundity of T. palpata females is needed to test this hypothesis fully.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2427.2005.01444.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 10
    Digitale Medien
    Digitale Medien
    EVOLUTIONARY AND MECHANISTIC THEORIES OF AGING (2005)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 50 (2005), S. 421-445 
    Details
    ISSN: 0066-4170
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie
    Notizen: Đ?“ Abstract?? Senescence (aging) is defined as a decline in performance and fitness with advancing age. Senescence is a nearly universal feature of multicellular organisms, and understanding why it occurs is a long-standing problem in biology. Here we present a concise review of both evolutionary and mechanistic theories of aging. We describe the development of the general evolutionary theory, along with the mutation accumulation, antagonistic pleiotropy, and disposable soma versions of the evolutionary model. The review of the mechanistic theories focuses on the oxidative stress resistance, cellular signaling, and dietary control mechanisms of life span extension. We close with a discussion of how an approach that makes use of both evolutionary and molecular analyses can address a critical question: Which of the mechanisms that can cause variation in aging actually do cause variation in natural populations?
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ento.50.071803.130409
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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