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lithostratigraphy
ism. In the simplest concept according to Liebig's law of the minimum growth is
limited by the one resource element, which is in the minimum.
limits oftolerance concept in physiological ecology concerned with the tolerance
of organisms to environmental factors. An example is the range of temperatures over which a species can reproduce or survive and which shows a
lower and upper limit of tolerance. Since organisms often perform differently in different phases of their life cycles, it is sometimes problematic to
measure their performance, and the upper and lower values of tolerance of
an organism to the range of environmental factors.
limnetic zone that part of the open water in freshwater lakes which is above the
oxygen compensation level and thus within the euphotic lone. The deeper part
of the open water of lakes is called profundal zone.
linnaeus, Carolus (Carl Linne) ~taxonomy.
lipids naturally occurring substances characterized by their insolubility in
water and their solubility in organic solvents (fat solvents) such as ether,
chloroform, boiling alcohol and benzene. Chemically, the lipids are either
esters of fatty acids or substances capable of forming such esters. They are
widespread in nature, being found in all vegetable and animal matter. Some
members of this group, such as the phosphatides and sterols, are found in all
living cells where, with proteins and carbohydrates, they form an essential part
of the colloidal complex of cytoplasm. Complex lipids are also found in
large quantities in brain and nervous tissues. Other lipids, such as fats and
oils, represent the chief form in which excess nutrients are stored in the animal body. They arise from ingested lipids and from the metabolism of carbohydrates and proteins, and are stored in fat deposits, such as subcutaneous connective tissue. Lipids act as heat insulators and as reserve supplies
of energy.
lithofacies ~facies.
lithosphere the outermost rigid layer of the earth, commonly 100 km thick,
including the crust and the uppermost part of the mantle. It is broken into
plates and rests on the more yielding asthenosphere. ~earth's internal structure.
lithostratigraphy (syn. rock stratigraphy) element of stratigraphy that deals with
the lithology of strata and with their organisation into units based on lithologic character. This lithologic character is also an important tool for facies
interpretations: the composition, structure and texture of sedimentary
rocks can be used to determine the depositional environment (~sedimentary
structures). ~stratigraphic hierarchy.
lithostratigraphy
ism. In the simplest concept according to Liebig's law of the minimum growth is
limited by the one resource element, which is in the minimum.
limits oftolerance concept in physiological ecology concerned with the tolerance
of organisms to environmental factors. An example is the range of temperatures over which a species can reproduce or survive and which shows a
lower and upper limit of tolerance. Since organisms often perform differently in different phases of their life cycles, it is sometimes problematic to
measure their performance, and the upper and lower values of tolerance of
an organism to the range of environmental factors.
limnetic zone that part of the open water in freshwater lakes which is above the
oxygen compensation level and thus within the euphotic lone. The deeper part
of the open water of lakes is called profundal zone.
linnaeus, Carolus (Carl Linne) ~taxonomy.
lipids naturally occurring substances characterized by their insolubility in
water and their solubility in organic solvents (fat solvents) such as ether,
chloroform, boiling alcohol and benzene. Chemically, the lipids are either
esters of fatty acids or substances capable of forming such esters. They are
widespread in nature, being found in all vegetable and animal matter. Some
members of this group, such as the phosphatides and sterols, are found in all
living cells where, with proteins and carbohydrates, they form an essential part
of the colloidal complex of cytoplasm. Complex lipids are also found in
large quantities in brain and nervous tissues. Other lipids, such as fats and
oils, represent the chief form in which excess nutrients are stored in the animal body. They arise from ingested lipids and from the metabolism of carbohydrates and proteins, and are stored in fat deposits, such as subcutaneous connective tissue. Lipids act as heat insulators and as reserve supplies
of energy.
lithofacies ~facies.
lithosphere the outermost rigid layer of the earth, commonly 100 km thick,
including the crust and the uppermost part of the mantle. It is broken into
plates and rests on the more yielding asthenosphere. ~earth's internal structure.
lithostratigraphy (syn. rock stratigraphy) element of stratigraphy that deals with
the lithology of strata and with their organisation into units based on lithologic character. This lithologic character is also an important tool for facies
interpretations: the composition, structure and texture of sedimentary
rocks can be used to determine the depositional environment (~sedimentary
structures). ~stratigraphic hierarchy.