Download Early 20th century

Ecology\ Third stage
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Department of biology
Dr. Kawther M. Ali
History of ecology
Ecology is a new science and considered as an important branch of
biological science, having only become prominent during the second half
of the 20th century. Its history back to the 4th century. One of the first
ecologists whose writings survive may have been Aristotle or perhaps his
student, Theophrastus, both of whom had interest in many species of
animals and plants. Theophrastus described interrelationships between
animals and their environment as early as the 4th century BC. Ecology
developed substantially in the 18th and 19th century.
18th and 19th century
1- Carl Linnaeus
Carl Linnaeus, a Swedish naturalist and inventor of science on the
economy of nature, is well known for his work with taxonomy but his
ideas helped to lay the groundwork for modern ecology. He developed a
two part naming system for classifying plants and animals. Binomial
Nomenclature was used to classify, describe, and name different genera
and species. Reid suggests "Linnaeus can fairly be regarded as the
originator of systematic and ecological studies in biodiversity," due to his
naming and classifying of thousands of plant and animal species.
Linnaeus was also one of the first naturalists to place men in the same
category as primates.
2- A. Humboldt
The German explorer Alexander von Humboldt is often considered a
father of ecology. He was the first to work on the study of the
relationship between organisms and their environment. He exposed the
existing relationships between observed plant species and climate, and
described vegetation zones using latitude and altitude, a discipline now
known as geobotany.
Ecology\ Third stage
Lec. 1
Department of biology
Dr. Kawther M. Ali
3- Charles Darwin
Founder of the hypothesis of evolution by means of natural selection, he
work on ecological studies of soils.
4- Karl Möbius
Several authors recognized at the time that species were not independent
of each other, and grouped them into plant species, animal species, and
later into communities of living beings (biocoenosis or living
community). The first use of this term is usually attributed to Karl
Möbius in 1877.
5- E. Warming
While Darwin focused exclusively on competition as a selective force,
Eugen Warming devised a new discipline that took abiotic factors, that is
drought, fire, salt, cold etc., as seriously as biotic factors. Based on his
lectures, he wrote the book ‘Plantesamfund’, which was immediate
translated to German, Polish and Russian, later to English as ‘Oecology
of Plants’.
6- E. Haeckel
The term ecology was coined in 1866 by a strong proponent of
Darwinism, Ernst Haeckel, his research links between ecology and
evolution.
Early 20th century ~ Expansion of ecological thought
1- E. Suess and V. Vernadsky
The Austrian geologist Eduard Suess proposed the term biosphere in
1875. Suess proposed the name biosphere for the conditions promoting
life, such as those found on Earth, which includes plants, animals,
minerals, matter cycles, etc.
In the 1920s Vladimir I. Vernadsky, a Russian geologist, detailed the idea
of the biosphere in his work "The biosphere" (1926), he thus redefined
Ecology\ Third stage
Lec. 1
Department of biology
Dr. Kawther M. Ali
the biosphere as the sum of all ecosystems. He described the fundamental
principles of the biogeochemical cycles.
2- A. Tansley
It was in 1935 that Arthur Tansley, the British ecologist, coined the term
ecosystem, the interactive system established between the biocoenosis
(the group of living creatures), and their biotope, the environment in
which they live. Ecology thus became the science of ecosystems.
3- E. Odum
Tansley's concept of the ecosystem was adopted by the influential
biology educator Eugene Odum. He with his brother, Howard T. Odum,
wrote a textbook which (starting in 1953) educated more than one
generation of biologists and ecologists in North America. So, Odum
brothers co-founder of ecosystem and ecological thermodynamic
concepts.
4- H. C. Cowles
At the 20th century, Henry Chandler Cowles was one of the founders of
the emerging study of "dynamic ecology", through his study of ecological
succession at the Indiana Sand Dunes, at the southern end of Lake
Michigan.
5- C. Elton
20th century English zoologist and ecologist, Charles Elton, is commonly
recognized as “the father of animal ecology”. Elton is also considered
the first to coin the terms, food chain and food cycle in his famous book
Animal Ecology. Elton is also attributed with his contributing to
disciplines of: invasion ecology, community ecology, and wildlife disease
ecology.
6- G. E. Hutchinson
George Evelyn Hutchinson was a 20th-century ecologist who is
commonly recognized as the “Father of Modern Ecology”. Hutchinson
Ecology\ Third stage
Lec. 1
Department of biology
Dr. Kawther M. Ali
is also attributed as being the first to infuse science with theory within the
discipline of ecology. Hutchinson was also one of the first credited with
combining ecology with mathematics. Another major contribution of as
he recognized the role of an organism within its community. Finally,
Hutchinson also left a lasting impact in ecology through his many
students he inspired.