A limnologist studying a freshwater lake categorizes biological observations across different scales of ecological organization. Arrange the following ecological units in order of increasing organizational complexity, from the narrowest level to the broadest level:
- 1A single Nile tilapia (*Oreochromis niloticus*) residing in the littoral zone of the lake
- 2All Nile tilapia (*Oreochromis niloticus*) inhabiting the freshwater lake
- 3All interacting populations of plants, fish, insects, and microorganisms within the lake
- 4The lake's biological community combined with non-living environmental factors such as water temperature, solar radiation, and dissolved oxygen
- 5The entire portion of the Earth supporting life, including all terrestrial and aquatic ecological systems
Cevap
The correct sequence from simplest to most complex organizational level is: (1) A single Nile tilapia (Organism) -> (2) All Nile tilapia inhabiting the lake (Population) -> (3) All interacting populations of organisms in the lake (Community) -> (4) The biological community combined with non-living environmental factors (Ecosystem) -> (5) The entire portion of Earth supporting life (Biosphere).
Ecological hierarchy progresses sequentially in scale and complexity: Organism -> Population -> Community -> Ecosystem -> Biosphere. A single living individual represents an organism. A group of organisms of the same species living together forms a population. Multiple populations of different species interacting in an environment form a community. The combination of a biological community with its non-living physical components (water, light, nutrients) constitutes an ecosystem. Finally, all Earth's ecosystems collectively form the biosphere.
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Anahtar Kavram
Levels of Ecological Organization
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