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  • Articles  (14)
  • Ecology
  • 1990-1994  (14)
  • Physics  (13)
  • Geosciences  (1)
  • Architecture, Civil Engineering, Surveying
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  • Articles  (14)
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Keywords
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Year
Journal
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  • 1
    Electronic Resource
    Electronic Resource
    Voucher specimens: A way to protect the value of your research (1990)
    Springer
    Biology and fertility of soils 9 (1990), S. 93-94 
    Details
    ISSN: 1432-0789
    Keywords: Voucher specimens ; Biology ; Ecology ; Taxonomy ; Soil animals ; Soil biologist
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Voucher specimens ensure that the identity of organisms studied in the field or in laboratory experiments can be verified, and ensure that new species concepts can be applied to past research. Guidelines on the collection, preparation, and deposition of voucher specimens and means of referral to them are given. Type specimens and the nomenclature of species names are briefly described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335789
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The method of response functions in ecology (1991)
    Springer
    International journal of biometeorology 35 (1991), S. 239-251 
    Details
    ISSN: 1432-1254
    Keywords: Modelling ; Ecology ; Response functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract This article describes the further development and new applications of the already well-known method of response functions. This method is used to present the quantitative evaluation of the reactions of various ecological and biological systems to environmental impacts. Two ecological problems were chosen as examples: the model of growth and development of cereal crops and the model of pollutant dynamics in the elementary ecosystem. In each case the results are given of the evaluation of parameters and the testing of models. It is shown that the method of response functions allows resolution of the wide range of ecological problems with sufficient accuracy, and some new theoretical results are presented. For example, based on the existing hypotheses of higher plant development, a biological time scale has been worked out. The method was elaborated to determine the minimum time of development, which is a genetically stipulated characteristic of a species and is realized when all environmental factors are optimal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047292
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  • 3
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    Biotechnology regulation (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simon, G -- New York, N.Y. -- Science. 1991 May 3;252(5006):629-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2024114" target="_blank"〉PubMed〈/a〉
    Keywords: Biotechnology/*legislation & jurisprudence ; Ecology ; Environmental Health
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Prospects for an invasion: competition between Aedes albopictus and native Aedes triseriatus (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-12
    Description: Competition between larval populations of the native North American treehole mosquito Aedes triseriatus and Aedes albopictus, recently introduced from Asia to North America, was assessed by comparing per capita growth rate estimates for experimental cohorts of larvae developing under a variety of initial density combinations in fluid obtained from tires or from treeholes. Estimates of carrying capacities and competition coefficients indicate that competition between the two species will result in stable coexistence in treehole communities but local extinction of A. triseriatus in tire habitats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Livdahl, T P -- Willey, M S -- R15AI27940/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 12;253(5016):189-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Clark University, Worcester, MA 01610.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1853204" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*physiology ; Animals ; Ecology ; Population Dynamics ; Regression Analysis ; Species Specificity ; Trees ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Density-dependent natural selection and trade-offs in life history traits (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-26
    Description: Theories of density-dependent natural selection state that at extreme population densities evolution produces alternative life histories due to trade-offs. The trade-offs are presumed to arise because those genotypes with highest fitness at high population densities will not also have high fitness at low density and vice-versa. These predictions were tested by taking samples from six populations of Drosophila melanogaster kept at low population densities (r-populations) for nearly 200 generations and placing them in crowded cultures (K-populations). After 25 generations in the crowded cultures, the derived K-populations showed growth rate and productivity that at high densities were elevated relative to the controls, but at low density were depressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mueller, L D -- Guo, P Z -- Ayala, F J -- S07 RR07008/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 26;253(5018):433-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, University of California, Irvine 92717.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1907401" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Crosses, Genetic ; Drosophila melanogaster/*genetics/growth & development/physiology ; Ecology ; Female ; Genetic Variation ; Male ; Models, Genetic ; Population Growth ; *Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    A rogue's gallery of pests (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culotta, E -- New York, N.Y. -- Science. 1991 Dec 6;254(5037):1446.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1683716" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bees ; *Culicidae ; Ecology ; Mollusca ; Pest Control ; Plants
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Biological diversity: where is it? (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-02-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pimm, S L -- Gittleman, J L -- New York, N.Y. -- Science. 1992 Feb 21;255(5047):940.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Tennessee, Knoxville 37996-0810.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1546290" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ecology ; *Genetic Variation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Regulatory role of parasites: impact on host population shifts with resource availability (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-12
    Description: Effects of infections by the ciliate Lambornella clarki on larval populations of its mosquito host Aedes sierrensis were examined in laboratory and field studies. When host populations developed with sufficient food, mortality from parasites was additive and reduced the number of emerging mosquitoes. For food-limited populations, mortality was compensatory or depensatory; emerging adults were as or more abundant with higher average fitness than those from uninfected control populations. When nutrients were scarce, parasitic infections relaxed larval competition and increased per capita food by reducing host abundance. Food limitation altered larval feeding behavior, reducing horizontal transmission and subsequent mortality from parasitism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Washburn, J O -- Mercer, D R -- Anderson, J R -- AI20245/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 12;253(5016):185-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Entomology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1906637" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*parasitology/physiology ; Animals ; Ciliophora/*physiology ; Ecology ; Population Dynamics ; Trees
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Genetic algorithms: principles of natural selection applied to computation (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-08-13
    Description: A genetic algorithm is a form of evolution that occurs on a computer. Genetic algorithms are a search method that can be used for both solving problems and modeling evolutionary systems. With various mapping techniques and an appropriate measure of fitness, a genetic algorithm can be tailored to evolve a solution for many types of problems, including optimization of a function of determination of the proper order of a sequence. Mathematical analysis has begun to explain how genetic algorithms work and how best to use them. Recently, genetic algorithms have been used to model several natural evolutionary systems, including immune systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Forrest, S -- New York, N.Y. -- Science. 1993 Aug 13;261(5123):872-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Computer Science, University of New Mexico, Albuquerque 87131-1386.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8346439" target="_blank"〉PubMed〈/a〉
    Keywords: *Algorithms ; Antibody Formation ; Biological Evolution ; *Computer Simulation ; Ecology ; Genes, Immunoglobulin ; Immunoglobulin Variable Region/genetics ; *Software
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Australian pest control by virus causes concern (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-08-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morell, V -- New York, N.Y. -- Science. 1993 Aug 6;261(5122):683-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8342036" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Australia ; Contraception, Immunologic/*veterinary ; Ecology ; Female ; *Foxes/microbiology ; *Genetic Engineering ; Male ; Myxoma virus/genetics ; Pest Control, Biological/*methods ; *Rabbits/microbiology ; Viruses/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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