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#ecological role

3 public questions tagged with this topic.

Protista - Chrysophytes and Dinoflagellates

What is the ecological role of chemosynthetic autotrophic bacteria described in the chapter?

Chemosynthetic autotrophic bacteria oxidise inorganic substances such as nitrates, nitrites and ammonia and use the released energy for ATP production. Through these activities, they play an important role in recycling nutrients such as nitrogen, phosphorus, iron and sulphur.

Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Chrysophytes and Dinoflagellates

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Habitat Niche

The niche of a species includes:

“Both biotic and abiotic resources” for the niche of a species includes. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. A niche is the multidimensional set of abiotic conditions, resources, and biotic relationships under which a population can persist. The fundamental niche reflects physiological and resource limits, while the realized niche is modified by competitors, consumers, mutualists, and dispersal barriers. The remaining alternatives—“Only biotic resources”, “Only abiotic resources”, “Neither biotic nor abiotic resources”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Niche differentiation reduces overlap by separating species along resource, space, or time axes. Such partitioning can stabilize coexistence when each species performs relatively better under the conditions it uses most strongly. Linking the wording to measurable consequences for fitness, abundance, or flux gives the conclusion its scientific meaning and prevents a purely mnemonic interpretation.

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 13

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