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  • 1
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    Continental-scale temperature variability during the past two millennia (2013)
    NATURE PUBLISHING GROUP
    In:  EPIC3Nature Geoscience, NATURE PUBLISHING GROUP, 6(5), pp. 339-346, ISSN: 1752-0894
    Details
    Publication Date: 2019-07-17
    Description: Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between ad 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period ad 1971–2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 2
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    An assessment of pollution in major creeks around Port Qasim (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26535 | 25017 | 2019-05-27 10:16:32 | 26535 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Discharge of industrial and domestic wastes in sea alter the physical and chemical properties of sea water, which may affect the marine ecosystem. This study was aimed to measure the water quality of eight different creeks around Port Qasim. Samples were collected and analyzed using standard procedures during February and March,2009. The parameters including pH, Conductivity, Total Dissolved Solids, Salinity, Dissolved Oxygen, Nitrate, Phosphate, Sulphate, Chloride, Calcium, Potassium, Zinc,Iron, Cobalt, Chromium, Manganese and Cadmium were determined. The result shows that Bakran creek and Gharo-Phitti creeks are heavily polluted compared to other creeks. This study recommends that wastes from the industries or sewerage should be treated before being discharge into the creek system.
    Description: Higher Education Commission of Pakistan
    Keywords: Conservation ; Environment ; Pollution ; Creeks ; Port Qasim ; nutrients ; Gharo-Phitti ; Bakran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-9
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  • 3
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    Diversity and seasonal variations of insects in Sandspit (backwater) mangrove forest (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26541 | 25017 | 2019-05-27 10:42:55 | 26541 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: The study deals with population diversity and seasonal variation of insectsin Sandspit mangrove forest dominated by grey mangrove Avicennia marina. In order toexamine the diversity and seasonal variations monthly data were collected fromNovember, 2007 to October, 2008. A total of 26 species of insects were recorded, mostof the species belonging to order Diptera. The highest diversity (H') 1.936 and richness(d1) 2.309 of insects were found in October while maximum value of evenness 1 wascalculated in September. The highest value of dominance (D) 0.851 was recorded inMarch. The result indicates that physical structure of mangrove vegetation facilitates thehabitation of insect fauna, canopy shade having an important function in providing coolerand wetter surface substrate at Sandspit area.
    Keywords: Biology ; Ecology ; Diversity ; seasonal variation ; insects ; Sandspit mangrove forest.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 61-66
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