
Environmental Encyclopedia 3
Grizzly bear
and teaching to the faculty of law, in addition to duties as
the person in charge of press information; part-time lecturer
position at the federal polytechnic school of Lausanne, serv-
ing as program man technique
environment
beginning in
1981; and, serving as an invited professor at the Federal
Universidade of Rio de Janeiro (Brazil) in 1980 and 1984.
His active schedule has taken him all over the world for
conferences and seminars. Grinevald retains membership in
several professional societies, including International Society
for Ecological Economics; European Association for Bioe-
conomic Studies; and, World Council for the
Biosphere
.
Grinevald has been published extensively. His writ-
ings—among them chapters and articles in various books
and journals—include, The Greening of Europe in 1990; “The
Revolution Carnotienne: thermodynamics, economy and
ideology,” from the European Review of Social Sciences, 1976;
and, “There is holistic total concept for deep and
ecology
:
the Biosphere,” for Fundamenta Scientiae, 1987. He has lec-
tured and written on subjects that include the biosphere, the
greenhouse effect
, and famous scientists such as Stephen
H. Schneider, a native New Yorker, whose research has
focused on the greenhouse effect on civilization. He has
been a regular contributor to a journal established by a group
at the University of Geneva in 1990, Strategies Energetiques
Biosphere et Society (Energy Strategies, Biosphere and Com-
pany) (SEBES). What began as a special volume became a
publication devoted to the biosphere.
Writing for the publication Etat De La Planete (State
of the Planet), Grinevald discussed the key issues of the
biosphere. “This concept underlines the fac that the Life
exceeds the individuals and is an ecological phenomenon
of solidarity on various scales, microbial communities on a
planetary scale of the
Biosphere
. It is the observer which
decides scale of observation, so much [more] at the geo-
graphical level than at the temporal level. It is our world
civilization which discovers the Biosphere as a phenomenon
characteristic of the face of the Earth in cosmos. That implies
a certain responsibility. The interdisciplinary and holistic
concept of Biosphere associates astronomy, geophysics,
me-
teorology
,
biogeography
, evolutionary biology, geology,
the geochemistry and, in fact, all science of the ground and
the living.”
[Jane Spear]
R
ESOURCES
B
OOKS
Freeman, William. The Biosphere. San Francisco: Scientific American, 1970.
P
ERIODICALS
Grinevald, Jacques. “Biodiversity and Biosphere.” Etat De La Planete. No. 1.
Grinevald, Jacques. “On Holistic Aconcept for Deep and Global Ecology:
The Biosphere.” Fundamenta Scientiae (1987): 197–226.
676
O
THER
University of Geneva. “The Effect Greenhouse of the Biosphere Thermo-
industrial Revolution with Total Ecology.” 1990 [cited July 2002]. &
lt:http://unige.ch/sebes>.
University of Geneva. “Stephen H. Schneider.” SEBES. 1995 [cited July
2002]. <:http://unige.ch/sebes>
University of Geneva Faculty Web Page. [cited June 2002]. <:http://w3.un-
ige.ch>.
O
RGANIZATIONS
University of Geneva, 24 street Rothschild, Geneva, Switzerland Email:
Jacques.Grinevald@iued.unige.ch, www.unige.ch
Grizzly bear
The grizzly bear (Ursus arctos), a member of the family
Ursidae, is the most widely distributed of all bear
species
.
Although reduced from prehistoric times, its range today
extends from Scandinavia to eastern Siberia, Syria to the
Himalayan Mountains, and, in North America, from Alaska
and northwest Canada into the northwestern portion of the
lower 48 states. Even though the Russian, Alaskan, and
Canadian populations remain fairly large, the grizzly bear
population in the northwestern continental United States
represents only about 1% of its former size of less than 200
years ago. Grizzly bears occupy a variety of habitats, but in
North America they seem to prefer open areas including
tundra
, meadows, and coastlines. Before the arrival of Euro-
peans on the continent, grizzlies were common on the Great
Plains. Now they are found primarily in
wilderness
forests
with open areas of moist meadows or
grasslands
.
Female grizzly bears vary in size from 200–450 lb (91–
204 kg), whereas the much larger males can weigh up to
800 lb (363 kg). The largest individuals—from the coast of
southern Alaska—weigh up to 1,720 lb (780 kg). Grizzly
bears measure from 6.5–9 ft (2–2.75 m) tall when standing
erect. To maintain these tremendous body sizes, grizzly bears
must eat large amounts of food daily. They are omnivorous
and are highly selective feeders. During the six or seven
months spent outside their den, grizzly bears will consume
up to 35 lb (16 kg) of food, chiefly vegetation, per day. They
are particularly fond of tender, succulent vegetation, tubers,
and berries, but also supplement their diet with insect grubs,
small rodents, carrion,
salmon
, trout, young deer, and live-
stock, when the opportunity presents itself. In Alaska, along
the McNeil River in particular, when the salmon are migrat-
ing upstream to spawn in July and August, it is not unusual
to see congregations of dozens of grizzly bears, along the
riverbank or in the river, catching and eating these large fish.
Grizzly bears breed during May or June, but implanta-
tion of the fertilized egg is delayed until late fall when the
female retreats to her den in a self-made or natural cave, or
a hollow tree. Two or three young are born in January,