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Determinants of macroinvertebrate community structure on stone surfaces in Hong Kong streamsShe, Shu-sheng., 佘書生. January 1993 (has links)
published_or_final_version / Zoology / Doctoral / Doctor of Philosophy
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Differential tolerance of introduced & native marine invertebrates to heavy metal pollutionPiola, Richard Fabio, Biological, Earth & Environmental Sciences, Faculty of Science, UNSW January 2007 (has links)
In near-shore marine environments, two of the most prevalent anthropogenic disturbances affecting ecosystem diversity and function are the invasion of exotic species, and the release of toxic chemicals. Estuarine and harbour environments worldwide are dually subjected to high levels of toxic disturbance and ever increasing rates of invasion, via activities such as boating and shipping. It is not clear, however, whether the success of invasive species is influenced by the presence of toxic contaminants in these impacted environments. In particular, nonindigenous marine species (NIS) may be advantaged in chemically disturbed environments if they are more tolerant of toxicants. This thesis examines whether nonindigenous and native sessile invertebrate species have differential tolerance to a common aquatic contaminant, copper (Cu), which has links to both the invasion process (via its use in antifouling paints and the vector of hull fouling) and the modification of recipient environments (via human-mediated pollution). A series of laboratory- and field-based experiments showed that the cosmopolitan invasive bryozoans Watersipora subtorquata, Bugula neritina and Schizoporella errata are highly tolerant of copper pollution. The larvae and adults of W. subtorquata and B. neritina in particular were able to survive and grow in copper-polluted environments far exceeding most observed real-world levels (< 100 /??g 1-1). These nonindigenous species also showed very strong postexposure recovery. In contrast, the co-occurring native bryozoans Celleporaria nodulosa and Fenestrulina mutabilis demonstrated comparatively low tolerance to copper, with markedly reduced survival and fitness under Cu contaminated conditions, and inferior recovery abilities post-exposure. These findings were further supported by a long-term manipulative field experiment, examining the effect that varying levels of Cu exposure have on the structure and diversity of developing sessile invertebrate assemblages. Cu exposure decreased native species diversity by up to 50%, yet had no effect on NIS numbers. Consequently, in the presence of copper contamination, NIS dominated sessile communities, often resulting in substantial changes to community structure. Important insights were also gained into the nature of metal tolerance in NIS. Toxicity studies on larvae of the introduced bryozoan Bugula neritina revealed intraspecific differences in tolerance to Cu, associated with the level of pollution experienced by the adult source populations. There was also evidence of fitness costs related with increased Cu tolerance. In summary, we have found evidence that the success of invasive species is influenced by chemical contamination. NIS may be advantaged in contaminated estuaries relative to native species and this may assist in their establishment and persistence in new habitats.
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The patterns of abundance and demography of rocky intertidal marine invertebrates indicate that recruitment can set geographical range limitsHidas, Eszter Zsofia. January 2007 (has links)
Thesis (M.Sc.-Res.)--University of Wollongong, 2007. / Typescript. Includes bibliographical references: leaf 96-109.
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Mesofauna associated with the subtropical/tropical marine sponge Amphimedon viridis are faunal associations likely to provide refuge from fish predation due to physical or chemical feeding deterrent properties of this sponge? /Huang, Jonathan. January 1900 (has links) (PDF)
Thesis (M.S.)--University of Alabama at Birmingham, 2007. / Description based on contents viewed May 30, 2008; title from title screen. Includes bibliographical references (p. 31-43).
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Growth morphology and succession in a temperate marine fouling community /Nelson, Matthew L. January 1900 (has links)
Thesis (M.A.)--Humboldt State University, 2009. / Includes bibliographical references (leaves 100-103). Also available via Humboldt Digital Scholar.
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Structure-forming benthic invertebrates : habitat distributions on the continental margin of Oregon and Washington /Strom, Natalie A. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2006. / Printout. Includes bibliographical references (leaves 45-48). Also available on the World Wide Web.
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Predicting prey availability for stream salmonids /Matousek, John J. January 1900 (has links)
Thesis (M.S.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 32-37). Also available via Humboldt Digital Scholar.
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Multivariate analysis of benthic macroinvertebrate communities of HongKong streamsChan, King-tung., 陳勁東. January 1996 (has links)
published_or_final_version / Ecology and Biodiversity / Master / Master of Philosophy
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The management of arable field margins to enhance natural populations of beneficial arthropodsHarwood, Robert William John January 1994 (has links)
No description available.
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The lethal and sub-lethal effects of lambda-cyalothrin to the syrphid Episyrphus balteatus (Degeer) (Diptera: Syrphidae)Moyle, Justine Louise January 1994 (has links)
No description available.
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