TAILIEUCHUNG - Ebook Elements of marine ecology (4/E): Part 2

Part 2 book “Elements of marine ecology” has contents: The sea bottom, energetics of a marine ecosystem, the seashore, sea fisheries, human impact on the marine environment. | 6 The sea bottom The sea floor is an area of great contrasts, from deep ocean ‘deserts’ of soft sediment to rich coral reefs. Exactly what lives there depends on a variety of conditions such as substrate type, current speeds and in particular availability of food. Even in deep water, there is generally some food available, mainly in the form of fragments of organic matter sinking from the overlying water, and in some areas this food supply may be sufficient to support a large population. Beneath shallow water there may also be primary production by benthic algae and photosynthetic bacteria to depths of about 50 m depending on water clarity. Kelps (. Laminaria, Alaria, Saccorhiza, Macrocystis), calcareous red algae (. Lithophyllum, Lithothamnion) and a variety of foliose algae, grow on shallow rocks where light is sufficient. A varied microflora of benthic diatoms and other photosynthetic protista occur on the surface of rock, sand or mud often visible to the naked eye as a thin brownish film. Many bottom-dwelling creatures are able to live and grow to large size with relatively little expenditure of energy in hunting and collecting food because they can obtain adequate nourishment simply by gathering the particles that fall within their reach or are carried to them by the currents. Others simply digest the organic matter and associated bacteria contained within the sediment. Most of the sea bottom is covered with soft deposits which give concealment and protection to burrowing creatures. Where the substrate is hard it provides a secure surface for the attachment of sessile forms and affords protection for creatures which hide in crevices or burrow in rock. Compared with the pelagic division of the marine environment the sea bottom provides a far wider variety of habitats because the nature of the bottom differs greatly from place to place. The benthic population of the sea is correspondingly more diverse than the pelagic population. Except in very shallow .

• Sinh học
• Elements of marine ecology
• The sea bottom
• Energetics of a marine ecosystem
• The seashore
• Sea fisheries
• Human impact
• Marine ecology
• Marine plankton
• Measuring and sampling
• The seawater habitat
• Chemical conditions
• Organic production in the sea
• Managing human resources
• Lecture Managing human resources
• Human resources
• Managing people
• Financial impact
• Human resource management activities
• Human resource
• High quality human resource
• Industrialization and modernization
• Education training factor
• Economic factors
• Tạp chí nghiên cứu y học
• The impact of seminal zinc and fructose concentration
• Seminal zinc and fructose concentration
• Human sperm characteristic
• Semen reflect the secretory
• Ethnic minorities
• Systematize and evaluate the impact
• Solutions and policies
• Physical development
• Heavy metal
• Review on heavy metal residues
• Indian milk
• Impact on human health
• Contamination of food chain
• Heavy metal in the animal body
• Resistant starch
• Physiological effects
• Potential impact
• Human health
• Encompasses forms of starch
• Summary of PhD thesis
• Human resource management
• The impact of organizational culture
• Organizational culture
• Vietnamese enterprises
• Human resource management practices
• Career satisfaction on employee’s turnover intention
• The human resources management
• Employee’s turnover intention
• The mediating role of career satisfaction
• Human Capital Development
• Training & Development
• IT firms in Bangalore
• Performance of the IT professionals
• Human capital development of employees
• Small and medium enterprises
• Manage human resource effectively
• Institutionalize knowledge
• Motivation enhancing practices
• Workplace organization
• Human resources quality
• Economic development
• Quality of human resources
• Cultural development
• Society originate
• Economic growth
• Human development index
• Physical capital
• Policy institutions
• Human Development Index HDI
• Human capital definition
• Human capital measurement
• Suggesting and implementing polices
• Combination of abilities and knowledge
• Examples of HC indicator
• Meloxicam administration
• Dystocia affected bovines
• Impact on release of Histamine
• Release of Histamine
• Requiring significant human assistance
• Impact assessment
• Nature resource management
• Development and conservation
• Livelihood pathway approach
• Human populations
• The change
• Vegetation cover
• The Be river basin
• Human factor
• Nhân tố nhân sinh
• Lưu vực sông Bé
• Lớp phủ bề mặt
• Climate variation
• Cropping pattern
• Impacts of human activities
• Indaw Gyi Lake
• Rain fed agriculture
• Run off and serious soil erosion
• Watershed protection
• Mental health
• Gut microbiota
• Therapeutic nutrition
• Human lifestyle
• Fermented foods
• Management of human resource
• Level of efficiency
• Timeliness and quality
• HRM and Employee Turnover
• Human resources firm
• Human resource management practices on employee engagement
• Moderating role of gender and marital status
• An evidence from the Vietnamese banking industry
• The Vietnamese bank industry
• The moderating roles
• Clustering of foreign firm
• Human capital and skill present
• Location choice strategy
• Innovation activity of foreign investors
• Host economy of a developing nation
• BMC Cancer
• Uterine cervical neoplasm
• Papillomavirus infections
• Human papillomavirus vaccines
• Invasive cervical cancer
• Doctoral thesis summary
• Job role
• Family role
• Job satisfaction
• Female lecturers
• Energy consumption
• Two way fixed effects regression
• Carbon intensity of human
• Energy consumption on carbon intensity
• FDI per capita
• Natural resource
• Human capital
• Ecological footprint
• Urbanization on ecological footprint