Li, Cheuk Yan Vivian. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 89-99). / Abstracts in English and Chinese. / Abstract (in English) --- p.I / Abstract (in Chinese) --- p.III / Acknowledgements --- p.IV / Table of contents --- p.V / List of figures --- p.VIII / List of tables --- p.XII / List of plates --- p.XIII / Chapter Chapter 1 --- Population Dynamics of Marine Cladocerans in Tolo Harbour / Chapter 1.1 --- Introduction --- p.1 / Chapter 1.1.1 --- Study site --- p.1 / Chapter 1.1.2 --- Species description and distribution --- p.2 / Chapter 1.1.3 --- Population dynamics of marine cladocerans --- p.4 / Chapter 1.1.3.1 --- Reproduction --- p.5 / Chapter 1.1.3.2 --- Fecundity of marine cladocerans --- p.6 / Chapter 1.1.3.3 --- Embryonic development time --- p.7 / Chapter 1.1.3.4 --- Food --- p.7 / Chapter 1.1.3.5 --- Predation --- p.8 / Chapter 1.2 --- Objective --- p.9 / Chapter 1.3 --- Materials and method --- p.10 / Chapter 1.3.1 --- Field sampling --- p.10 / Chapter 1.3.2 --- Hydrographical parameters and chlorophyll a concentration --- p.10 / Chapter 1.3.3 --- Zooplankton sampling --- p.11 / Chapter 1.3.4 --- Zooplankton analysis --- p.11 / Chapter 1.3.5 --- Calculation of Population Parameters --- p.12 / Chapter 1.4 --- Results --- p.16 / Chapter 1.4.1 --- Hydrographical parameters --- p.16 / Chapter 1.4.1.1 --- Temperature --- p.16 / Chapter 1.4.1.2 --- Salinity --- p.16 / Chapter 1.4.1.3 --- Dissolved Oxygen content --- p.17 / Chapter 1.4.2 --- Chlorophyll a concentration --- p.17 / Chapter 1.4.3 --- Seasonal occurrence of marine cladocerans in Tolo Harbour --- p.26 / Chapter 1.4.4 --- Parameters of the marine cladocerans populations --- p.32 / Chapter 1.4.5 --- Occurrence of gamogenic individuals of marine cladocerans --- p.51 / Chapter 1.4.6 --- Occurrence of chaetognaths --- p.51 / Chapter 1.5 --- Discussion --- p.57 / Chapter 1.6 --- Conclusion --- p.66 / Chapter Chapter 2 --- "Molecular detection of the diet of the marine cladocerans, Pseudevadne tergestina" / Chapter 2.1 --- Introduction --- p.68 / Chapter 2.1.1 --- The importance of marine cladocerans --- p.68 / Chapter 2.1.2 --- Previous findings on cladoceran diet --- p.69 / Chapter 2.1.2.1 --- Sidid cladocerans --- p.69 / Chapter 2.1.2.2 --- Podonid cladocerans --- p.69 / Chapter 2.1.3 --- Methods to investigate the feeding habit of animals --- p.71 / Chapter 2.1.4 --- Application of molecular detection --- p.72 / Chapter 2.2 --- Objectives --- p.73 / Chapter 2.3 --- Materials and method --- p.74 / Chapter 2.3.1 --- Zooplankton sampling and preparation --- p.74 / Chapter 2.3.2 --- DNA extraction --- p.74 / Chapter 2.3.3 --- 18S rRNA gene amplification --- p.75 / Chapter 2.3.4 --- 18S rRNA Cloning --- p.76 / Chapter 2.3.5 --- Clone screening by RFLP --- p.76 / Chapter 2.3.6 --- Sequencing and phylogenetic analysis --- p.77 / Chapter 2.4 --- Results --- p.78 / Chapter 2.4.1 --- Alveolata --- p.78 / Chapter 2.4.2 --- Other lineages --- p.79 / Chapter 2.5 --- Discussion and conclusion --- p.85 / Chapter 2.5.1 --- Errors and improvements --- p.87 / Reference --- p.89

As sea level rises, saltwater migration can threaten coastal ecosystems and beach-dune environments, which negatively impacts coastal flora. This study uses ground penetrating radar (GPR) to evaluate the spatiotemporal variability of saltwater migration in the near shore at high lateral resolution (i.e. cm) by using daily micro tidal cycles as analogs to infer saltwater migration. Time-lapse GPR profiles were collected at low and high tide capturing phase lags of the tidal flux through different substrates. GPR measurements were collected at two sites in Miami with contrasting lithologies: a) Crandon Park, composed of unconsolidated sand; and b) the Barnacle Historic State Park, composed of the Miami Limestone Formation. Laboratory-scale GPR measurements were collected over samples mimicking field conditions. The results may be helpful to identify regions vulnerable to saltwater migration in the near shore based on lithological variability, and to mitigate negative impacts for flora in beach-dune habitats during sea level rise. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2007. / Ph.D. in Marine Environmental Science. Includes bibliographical references. Also available in electronic version.

Thesis (Ph. D.)--University of Hong Kong, 1996. / Includes bibliographical references (leaf 135-154).

Thesis--Massachusetts Institute of Technology/Woods Hole Oceanographic Institution. / "WHOI-80-21." Vita. Includes bibliographical references (p. 187-206).

Various studies indicate the acmaeid limpet species Collisella digitalis, Collisella pelta and Notoacmea scutum inhabit different vertical zones in the rocky-intertidal region. At Sunset Bay, Oregon, Shotwell (1950) found that C. digitalis was situated in the upper intertidal C. pelta inhabited the mid-intertidal and N. scutum was located in the mid to lower zone in the rocky-intertidal region. Frank (1965) observed the same distribution patterns at Coos Bay, Oregon as did the author in the rocky-intertidal region near Dillon Beach, California. Species distributions in the rocky-intertidal region are thought to be limited from above by physical stress and from below by predation or competition (Connell 1970; Dayton 1971; Vermeij 1972; Paine 1974; Bertness 1977). The purpose of the present study was to investigate effects of the predators Pisaster ochraceus, Cancer antennarius and Pachygrapsus crassipes on the distributions of the three acmaeid limpet species particularly with respect to their lower limits.

Thesis (M. Phil.)--University of Hong Kong, 1991.

published_or_final_version / Zoology / Master / Master of Philosophy

This thesis examines a number of natural and anthropogenic disturbances within marine macrophyte habitats of the Caribbean. Understanding the effects of disturbance and the patterns associated with such dynamics is fundamental to ecological studies. Dynamics of interest included: interactions between populations; interactions between life history strategies; successional regimes; and alterations of community structure including loss of trophic heterogeneity and the possibility of "alternate" states. First I explored natural physical disturbance and succession. The dominance of macroalgae in the mid-shore, between areas of seagrass, challenged "classic" succession in such communities. I therefore proposed a model that included chronic "stress" by wave energy that could lead to a reversal in the climax state. Next, I investigated the importance of other grazers (i.e. trophic heterogeneity) in mediating the strength of trophic cascades (e.g. overgrazing). The enclosure experiments used suggested that different life history strategies respond differently to experimental conditions and that interference competition between specialist (conch) and generalist (urchins) grazers results in urchins switching to alternate resources and displaying lower condition. This dynamic may indirectly "buffer" the community against population expansions of urchins and overgrazing of diversity enhancing detritus. Under high nutrient enrichment, urchins maintained themselves, the trophic cascade and low diversity by switching to "expanded" autochthonous and "new" allochthonous resources. I continued to examine the effects of increasing nutrient enrichment, which correlated well with increasing human density, by examining eleven seagrass beds. The patterns of increasing consumer density and decreasing consumer diversity corresponded well to increasing enrichment and loss of autochthonous detritus. At high levels of enrichment, the community was dominated (> 90%) b

It is hypothesized that difference between containers and between sediments will produce structural differences in the resulting communities by intensifying competition for resources, and by excluding certain classes of predators. It is also hypothesized that the level of the effect of container, substrate, and time on community structures will be dependent on tidal level. Paine (1969) and Dayton (1972) have demonstrated that the structure of some communities is largely determined by the effects of foundation, or keystone, species. It is suggested that the structure of classic-substrate communities may be determined similarly.