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  • Humans  (1)
  • Landscape ecology  (1)
  • 1990-1994  (2)
  • 1960-1964
  • 1991  (2)
  • 1961
  • 1
    Electronic Resource
    Electronic Resource
    Short-term effects of a catastrophic beaver dam collapse on a stream fish community (1991)
    Springer
    Environmental biology of fishes 31 (1991), S. 123-129 
    Details
    ISSN: 1573-5133
    Keywords: Benthic insects ; Colonization dynamics ; Disturbance ; Floods ; Landscape ecology ; Minnesota
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis We examined the short-term effects of the natural catastrophic collapse of a beaver dam on downstream benthic insect density and fish community structure in a headwater tributary of the Mississippi River. The catastrophic collapse of the dam and ensuing flash flood resulted in a dramatic (〈 90%) decrease in benthic insect density in riffle and pool habitats. Sixty days after collapse of the dam, insect densities in riffles were 62% of pre-collapse densities. Insect recolonization of pools was slower than for riffles; 60 days after collapse of the dam insect densities in pools were 8% of pre-collapse levels. Collapse of the beaver dam altered the structure of the downstream fish community by causing a short-term (2–4 days) influx of pond species, resulting in a brief increase in species richness and abundance. Fish species richness and abundance then decreased for 4–60 days to levels below those prior to the collapse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00001012
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    Predicting coiled coils from protein sequences (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-24
    Description: The probability that a residue in a protein is part of a coiled-coil structure was assessed by comparison of its flanking sequences with sequences of known coiled-coil proteins. This method was used to delineate coiled-coil domains in otherwise globular proteins, such as the leucine zipper domains in transcriptional regulators, and to predict regions of discontinuity within coiled-coil structures, such as the hinge region in myosin. More than 200 proteins that probably have coiled-coil domains were identified in GenBank, including alpha- and beta-tubulins, flagellins, G protein beta subunits, some bacterial transfer RNA synthetases, and members of the heat shock protein (Hsp70) family.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lupas, A -- Van Dyke, M -- Stock, J -- AI20980/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1991 May 24;252(5009):1162-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Princeton University, NJ 08544.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2031185" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/chemistry ; Animals ; Databases, Factual ; Humans ; Probability ; *Protein Conformation ; Proteins/chemistry/*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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