Marine ecosystems

Xem 1-20 trên 77 kết quả Marine ecosystems
  • This book began its evolution in 1999 when the British Antarctic Survey, where I worked at the time, began a new research programme on the management of marine ecosystems. This programme concentrated upon the krill-based ecosystem at SouthGeorgia which has been the subject of almost continuous study since the Discovery Expeditions in the 1920s. Latterly, international efforts to understand the dynamics of this ecosystem and the wider Southern Ocean have been coordinated by the Commission for the Conservation of AntarcticMarine Living Resources (CCAMLR)....

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  • Why did I decide to write this book? As an undergraduate student I could not make up my mind whether I wanted to be a zoologist or a botanist, so I decided to adopt ecology, in its broadest sense, as my area of interest. This led me to think about interactions among organisms and to try to look at ecosystems from a holistic, rather than from an autecological, point of view. As someone with little formal training in mycology, my interest in fungi started during my doctoral research, especially when attending university-wide lectures by C. T. Ingold, given at the University of London.

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  • Challenges to sustaining the productivity of oceanic and coastal fisheries have become more critical and complex as these fisheries reach the upper limits to ocean harvests. In addition, it is now clear that we are managing interactive and dynamic food webs rather than sets of independent single-species populations.

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  • The timing of the publication of this book couldn’t be better as we celebrate the 50th anniversary of Charles Elton’s seminal book, The Ecology of Invasions by Animals and Plants. Since this influential book was published in 1958, the study of bioinvasions has developed exponentially, alongside the exponential growth in the magnitude of the invasion problem itself. Today, bioinvasion, a highly complex ecological process and environmental concern, has become a specific branch in ecology and environmental studies, with many disciplines developing within it....

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  • The concept of marine reserves has been repeatedly addressed in the past 25 years, but implementation and subsequent evaluation of these protected areas has been relatively infrequent until the past decade. In recent years, there has been strong advocacy for reserves among the conservation community and those concerned about losses of habitat and biodiversity in the sea.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: T4 genes in the marine ecosystem: studies of the T4-like cyanophages and their role in marine ecology

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  • Tham khảo sách 'dynamic changes in marine ecosystems', nông - lâm - ngư, nông nghiệp phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The growth of Aquaculture and its future role as a food supplier to human society has environmental, social and economic limitations, affecting marine ecosystems and socio-economic scales from local to global. These are close links with human health requirements and societal needs for various goods and services provided by marine ecosystems. This book shows this broad spectrum of dependencies of the future growth of aquaculture and highlights both relevant problems and expectations.

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  • This ancient Native American proverb and what it implies resonates today as it has become increasingly obvious that people’s actions and interactions with the environment affect not only living conditions now, but also those of many generations to follow. Humans must address the effect they have on the Earth’s climate and how their choices today will have an impact on future generations.

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  • This book is about the distribution and abundance of different types of organism, and about the physical, chemical but especially the biological features and interactions that determine these distributions and abundances. Unlike some other sciences, the subject matter of ecology is apparent to everybody: most people have observed and pondered nature, and in this sense most people are ecologists of sorts. But ecology is not an easy science.

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  • Understanding and quantitative describing of marine ecosystems requires an integration of physics, chemistry and biology. The coupling between physics, which regulates for example nutrient availability and the physical position of many organisms is particularly important and thus cannot be described by biology alone. Therefore the appropriate basis for theoretical investigations of marine systems are coupled models, which integrate physical, chemical and biological interactions.

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  • In  the  past,  environmental  goods  and  services were  seen  as  having  limited  economic  importance.  Now, environmental issues and activities pervade every aspect of our economic life and performance  and  are  subject  to  challenging  national  and  international  targets,  strict  monitoring  regimes  and  ongoing  discussion  and  debate  in  the  media.  As  understanding  of  environmental  challenges  has  grown, so too has appreciation of the size of the market and the associated business opportunities.

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  • England’s fisheries in 1871, Congress created the U.S. Commission of Fish and Fisheries (Hobart 1995). The first appointed Commissioner, Spencer Baird, initiated marine ecological studies as one of his first priorities. According to Baird, our understanding of fish “... would not be complete without a thorough knowledge of their associates in the sea, especially of such as prey upon them or constitute their food....” He understood that the presence or absence of fish was related not only to removal by fishing, but also to the dynamics of physical and chemical oceanography.

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  • The ocean absorbs a significant portion of carbon dioxide (CO2) emissions from human activities, equivalent to about one-third of the total emissions for the past 200 years from fossil fuel combustion, cement production and land use change (Sabine et al., 2004). Uptake of CO2 by the ocean benefits society by moderating the rate of climate change but also causes unprecedented changes to ocean chemistry, decreasing the pH of the water and leading to a suite of chemical changes collectively known as ocean acidification.

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  • This volume, the first in a series, presents the findings of an ambitious project—to measure the impact of fishing on the ecosystems that make up the North Atlantic Ocean and to propose ways to mitigate that impact. The project arose from a request by Dr. Joshua Reichert, the Director of the Environment Program of the Pew Charitable Trusts, Philadelphia, to answer six specific questions about the North Atlantic: • What are the total fisheries catches from the ecosystems, including reported and unreported landings and discards at sea?...

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  • Bioremediation, the use of microorganisms, by virtue of their bioconcentrating and metabolic properties, to degrade, sequester, or remove environmental contaminants, has about a 45-year history. Such uses of microorganisms for this purpose now involve freshwater, marine, and terrestrial environments. Bioremediation is a multidisciplinary area of knowledge and expertise that involves basic and applied science. Microbiologists, chemists, toxicologists, environmental engineers, molecular biologists, and ecologists have made major contributions to this subject....

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  • The outputs of an ARIES session have numerous practical uses for conservation and economic development planning. Notably, they can show which regions are critical to maintaining the supply and flows of particular benefits for specific beneficiary groups. By prioritizing conservation and restoration activities around sources and sinks for particular services, benefit flows may be maintained or increased. Similarly, focusing development or extractive resource use outside these regions can prevent degradation of benefit flows.

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  • Importance of Coral Reefs: 0.2% of world’s ocean. Habitat for 1/3 of marine fishes. Habitat for tens of thousands of other animals. The rainforests of the oceans. Destruction of other ecosystems upon which coral reefs depend. Possible disruption of reproduction and recruitment.

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  • The success of the first volume of The Biology of Sea Turtles revealed a need for broad but comprehensive reviews of recent major advances in sea turtle biology. At that time, book size constraints as well as the fast-paced changes in some fields dictated that this need could be only partially addressed in a single volume. Many important topics were not covered and were left for future volumes. Volume II emphasizes practical aspects of biology that relate to sea turtle management and changes in marine and coastal ecosystems....

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  • Technological innovation prompted by the need to satisfy the changing needs of society, ever more effi ciently and economically, involves complex interactions between three basic systems: the production system, the economic system, and the ecosystem

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