Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: This special issue of the Journal of Forest Science is a result of the international conference Species Diversity, Population Structure and Impact of Animals and...
Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Density and population structure of the natural regeneration of Scots pine (Pinus sylvestris L.) in the High Ebro Basin (Northern Spain)...
Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Post-grazing Scots pine colonization of mid-elevation heathlands: population structure, impact on vegetation composition and diversity"
Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Genetic variability and population structure of endangered Panax ginseng in the Russian Primorye...
Many populations are composed of a mixture of individuals that reproduce at different
times, and these times are often heritable. Under these conditions, gene flow should be
limited between early and late reproducers, even within populations having a unimodal
temporal distribution of reproductive activity. This temporal restriction on gene flow
might be called ‘isolation by time’ (IBT) to acknowledge its analogy with isolation by
distance (IBD). IBD and IBT are not exactly equivalent, however, owing to differences
between dispersal in space and dispersal in time.
The rapidly increasing global population has dramatically increased the demands for
natural resources and has caused signiﬁcant changes in quantity and quality of natural
resources.To achieve sustainable resource management, it is essential to obtain insight-
ful guidance from emerging disciplines such as landscape ecology.This text addresses
the links between landscape ecology and natural resource management.These links are
discussed in the context of various landscape types,a diverse set of resources,and a wide
range ofmanagement issues.
In engaging and conversational style, "Teaching About Evolution and the Nature of Science" provides a well-structured framework for understanding and teaching evolution. Written for teachers, parents, and community officials as well as scientists and educators, this book describes how evolution reveals both the great diversity and similarity among the Earth's organisms; it explores how scientists approach the question of evolution; and it illustrates the nature of science as a way of knowing about the natural world.
The fishery of the Mekong River is one of the largest and most significant in the world, and most of the
production is based on migratory river fishes. An earlier report provided an overview of the general patterns
of fish migrations and their significance for management. This complementary report provides more detailed
information on 40 key species which are significant in the Mekong River fishery. For each species we
provide notes on distribution, feeding, size, population structure, critical habitats, life cycle and its importance
Today, the world faces many problems. The most important problem is the
population explosion. The population of 2.8 billion around 1945 doubled
during the following 50 years, and it will approximately double again, reaching
10 billion during the next 50 years. This population increase will produce
serious effects on worldwide food consumption and distribution; however, a
sharp production increase in agricultural products cannot be expected.
Service Robot Applications
..Service Robot Applica tions
Service robotics is among the most promising technology dedicated to supporting the
elderly since many countries are now facing aging populations coinciding with a decrease in
the amount of the young working population. Service robots assist human beings, generally
by performing dirty or tedious work, such as household chores. Service robots, in some
cases, may replace human caretakers in their ability to care for elderly people.
Some flow cytometers have the ability to physically separate different sub-populations of
interest (cell sorting) depending on their cytometric characteristics (stream-in-air), thus
permitting the recovery and purification of cell subsets from a mixed population for further
applications (Bergquist et al., 2009; Davey, 2010).
fast pace. As part of the structural adjustment programmes of the late 1980s and early
1990s Bangladesh undertook a number of initiatives towards trade liberalisation and trade
promotion to stimulate exports and encourage investment in export-oriented activities.
The major objective of these reforms was removal of anti-export bias, introduction of
incentives for exports and facilitation of participation in global labour market.
This book addresses the significant environmental changes experienced by
high latitude and high altitude ecosystems at the beginning of the 21st century.
Increased temperatures and precipitation, reduction in sea ice and
glacier ice, the increased levels of UV-radiation and the long-range transported
contaminants in arctic and alpine regions are stress factors that
challenge terrestrial and aquatic ecosystems.
The scope of this book is to demonstrate that we do have an ecosystem theory that can be
used to describe ecosystem structure and function. It was previously shown in the book,
Integration of Ecosystem Theories: A Pattern (3rd edition, 2002), that the various contributions
to systems ecology are consistent and together form a pattern of ecological
processes. My book with Yuri Svirezhev, Toward a Thermodynamic Theory of Ecosystems
(2004), presented the thermodynamics of this pattern in a mathematical language....
Future historians may well look upon the years 1978–80 as a revolutionary
turning-point in the world’s social and economic history.
In 1978, Deng Xiaoping took the first momentous steps towards
the liberalization of a communist-ruled economy in a country that
accounted for a fifth of the world’s population. The path that
Deng defined was to transform China in two decades from a closed
backwater to an open centre of capitalist dynamism with sustained
growth rates unparalleled in human history....
Information about plant genetic diversity is necessary for the development of appropriate
strategies in conservation biology as well as in many other applied fields. From a basic
evolutionary standpoint, genetic diversity is assumed to be crucial for the evolutionary
potential of a species. Research programs that aim to investigate population structure
provide evolutionary insights into the demographic patterns of diverse organisms (Milligan
et al., 1994).
Numerous U.S. REITs and other institutions have invested in real property connected to
maquiladoras, retail development and tourism. This trend should persist because Mexico is ripe for
continued investment. With respect to retail development, for example, there are fewer than 1,000
malls and shopping centers in Mexico, which has a population of approximately 110 million
people. In comparison, there are more than 102,000 malls and shopping centers in the U.S., which
has a population of approximately 306 million people.
‘Professions’ have been subject to a variety of theoretical schema that attempt to
identify their unique characteristics or traits: the features that can be regarded as the basis for
the discrimination between forms of occupational organization and control that are
professional and those that are not (Saks, 1983; Abbott, 1988). This elaboration of the
essential traits of professions is more than a professional discourse.
Lenne, 1996) and to decrease
damage by pests and pathogens (Cantelo & Sanford, 1984). In some crops (e.g. rice) this is
applied on a large scale to maximize yield by minimizing damage by pathogens (Zhu et al.,
2000). Information on genetic diversity and population structure also assists plant breeding
in the selection of parents for crossing, providing a more rational basis for expanding the
gene pool, and for identifying materials that harbor genes of value for plant improvement.
Through its capacity to combine growth and inclusiveness, our social market economy is one
of Europe's greatest assets. But today its economy and its society face the threat that the grave
problems of high unemployment, increased poverty and social exclusion risk becoming
structural. The EU dimension must be harnessed to assist Member States to find every
opportunity to help people looking for work and to address the mismatch between labour
supply and demand.