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פרק 27
מהי מערכת אקולוגית?
An ecosystem is the interaction between all abiotic and biotic factors in an environment and can be classified as terrestrial or aquatic.…
רמות הזנה
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food…
הפקה ראשונית
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers…
יעילות הפקה
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic…
יעילות תזונה
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss…
מהם מחזורים ביו-גיאו-כימיים?
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in…
מחזור המים
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living…
מחזור הפחמן
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged…
מחזור החנקן
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of…
מחזור הזרחן
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as…
מחזור הגופרית
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found…
ריפוי ביולוגי
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful…

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