Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Pollution stress"”.
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Sensitivity of two forest growth models to simulated pollution stress modifications
… to the study of long-term interactions of air pollution stress and forest growth and yield. TASS was previously developed to examine the dynamics and yield of Douglas-fIr, and PTAEDA2 was previously developed to examine individual tree growth and stand development in loblolly pine plantations. …
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Modeling the potential effects of growth reductions and changes in photosynthetic efficiency and needle retention on the stand-level growth of loblolly pine plantations
… was modified study the potential effects of air pollution stress on the growth and yield of loblolly pine plantations. These modifications were based on the assumption that pollution stress on older trees could result in reductions in diameter and height growth, decreases in photosynthesis, and …
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A Study of Asymmetry in Mosquitofish Populations in Polluted and Nonpolluted Environments Using a New Scale Staining Technique.
… asymmetry did not serve as a reliable index of pollution in the four mosquitofish populations. Two of the populations (one polluted, one nonpolluted) had virtually identical asymmetry levels. For these populations at least, lateral line pore asymmetry was influenced by factors other than level …
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An analysis of the potential effects of air pollutants emitted during coal combustion on yellow poplar and loblolly pine and influences on mycorrhizal associations of loblolly pine
… found to be a more sensitive indicator of air pollution stress than either shoot dry weight, height growth or visible symptoms. Loblolly families 2-8 and 540 were not found to be differentially sensitive to pollutant treatments. Loblolly pine seedlings, nonmycorrhizal and mycorrhizal with …