Marine Ecology and Environment. Introduction: Ecology and its Domain. Definition and scope of ecology The word ‘ ecology ’ was first used by Ernest Haeckel in 1869. Ecology is the scientific study of the interactions between organisms and their environment.
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Introduction: Ecology and its Domain • Definition and scope of ecology • The word ‘ecology’ was first used by Ernest Haeckel in 1869. • Ecology is the scientific study of the interactions between organisms and their environment. • The word ‘ecology’ is derived from the Greek oikos, meaning ‘home’.
Moderm definition: The scientific study of the distribution and abundance of organisms and the interactions that determine distribution and abundance. • The living world can be viewed as a biological hierarchy that starts with subcellular particles, and continues up through cells, tissues and organs. • Ecology deals with the next three levels: the individual organism, the population, and the community.
Individual organism: • Population: consisting of individuals of the same species. • Community: consisting of a greater or lesser number of species populations.
At the level of the organism, ecology deals with how individuals are affected by (and how they affect) their environment. • At the level of the population, ecology is concerned with the presence or absence of particular species, their abundance or rarity, and with the trends and fluctuations in the numbers. • Community ecology then deals with the composition and organization of ecological communities.
Description (描述), explanation(解釋) (understand), prediction(預測) and control(控制) • To describe… • To explain… • To predict… • To control…
1.3 Properties of Seawater • Pure Water
Viscosity (黏滯力) and Surface Tension (表面張力)
Density-Temperature Relationships Heat Capacity • Convection • Conduction • Calories • Latent heat Of vaporization • Latent heat of fusion
Sea water Dissolved Salts
Water Pressure Dissolved Gases and Acid-Base Buffering
Dissolved Nutrients Nitrate (NO3-) Phosphate (PO43-)
1.4 The Ocean in Motion • Wind Waves