#marine ecosystems

Controls Ecosystem

Nutrient enrichment experiments test:

“Bottom-up control” for nutrient enrichment experiments test. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Rates depend on temperature, moisture, substrate quality, consumer physiology, and the elemental balance between organisms and their food. These controls explain why the same process can differ among terrestrial, freshwater, and marine systems without changing its definition. The remaining alternatives—“Top-down control”, “Predator-prey interactions”, “Abiotic stresses”—refer to different

Ref: Fundamentals of Ecology, Odum & Barrett, 5th Ed., Ch. 4

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Controls Ecosystem

The wasp-waist model is typically observed in:

“Marine ecosystems” for the wasp-waist model is typically observed in. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Ecosystem processes are constrained by energy conservation and by the cycling of matter. Energy enters mainly through primary production, is lost as metabolic heat at every transfer, and therefore cannot be recycled in the way that carbon, nitrogen, phosphorus, or water can. The remaining alternatives—“Desert ecosystems”, “Grassland ecosystems”, “Mountain ecosystems”—refer to diff

Ref: Fundamentals of Ecology, Odum & Barrett, 5th Ed., Ch. 4

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Applied Ecology

What is a risk of plastic entanglement on coral reefs?

Plastic sheets, lines, and nets entangled on coral reefs can cover living tissue and restrict water movement. Shading reduces light available to photosynthetic symbiotic algae, while reduced circulation limits oxygen exchange and waste removal, especially at night or within boundary layers. Abrasion also wounds tissue. These stresses make light and oxygen deprivation plausible consequences, not enhanced photosynthesis, fertilisation, or reproduction. Standardised sampling and contamination controls are essential because airborne fibres can enter samples during collection and laboratory process

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

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Biological Classification

The phenomenon of 'red tides', which can kill marine fishes due to toxin release, is caused by the rapid multiplication

According to NCERT Class 11 Biological Classification, red dinoflagellates, such as Gonyaulax, often undergo such rapid and explosive multiplication that they make the sea appear vibrantly red (red tides). These extensive blooms are not just visual; they release potent chemical toxins in large quantities that can severely poison and kill numerous marine animals, including massive populations of commercial fishes.

Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.2 Kingdom Protista

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