Ecosystem Test - 1

Explanation:

In ecosystem, flow of energy takes place in only one direction. The flow of energy takes place from producers to final consumers. Energy present in one trophic levels nevers return back to producer.

Explanation:

Net primary productivity (NPP) is equal to Gross primary productivity (GPP) minus Respiration loss (R). NPP is the available biomass for the consumption of heterotrophs in the ecosystem.

Explanation:

Phytoplanktons are small floating photosynthetic unicellular plant. In the aquatic ecosystem phytoplankton are producers that fix solar energy by the process of photosynthesis.

Explanation:

Photoautotrophs are organism that perform photosynthesis in presence of sunlight. Euglena contains chlorophyll and fixes the solar energy so, it acts as photoautotrophs.

Explanation:

The term "ecosystem" was first used in 1935 in a publication by British ecologist Arthur Tansley.

Tansley devised the concept to draw attention to the importance of transfers of materials between organisms and their environment.

Ecosystem is the functional unit of nature where living and non-living components interact with each other.

Explanation:

The pyramid of energy is always erect in both terrestrial and aquatic ecosystems. It is so because the energy accumulated by producers by photosynthesis is not stored in their body totally as some part of the energy they produce is used to perform different activities. So the energy flow decreases from producers to top level of consumer.

Explanation:
ecological parameter is a variable, measurable property whose value is a determinant of the characteristics of an ecosystem.

Ecological parameter includes, biomass, energy and number of individual in the ecosystem. Stratification is not a part of ecological parameter because it can not be quantified.

Explanation:

Primary productivity refers to the degree to which autotrophic organisms (primarily plants and algae) convert energy into organic substances through photosynthesis or chemosynthesis. Since the process of photosynthesis consumes carbon dioxide and produces oxygen, it is of great importance to the environment. Primary productivity refers to the amount of carbon-fixing biomass produced.

Explanation:

Nepenthes (pitcher plant) and Drocera are insectivores plants to compensate their protein requirement. They have green leaves that perform photosynthesis process. So, they act as both producer as well as consumer.

Explanation:

An ecosystem is a dynamic complex of plant, animal and micro-organism communities and the abiotic environment interacting as a functional unit. Ecosystems are not static but dynamic and discontinuous systems with interactions and connections which continually evolve both spatially and temporally. They represent ecological processes and the resources they provide can be expressed in terms of goods and services.