Concept

Rationale: Eduard Suess coined the term 'Biosphere' in 1875 to describe the place on Earth's surface where life dwells, though Vladimir Vernadsky later expanded it into a comprehensive biogeochemical theory.

Rationale: The phosphorus cycle is a sedimentary cycle because its reservoir pool is primarily located in rocks and soil, unlike nitrogen, carbon, and oxygen whose reservoirs are in the atmosphere.

Rationale: Solar radiation is the fundamental source of energy that drives photosynthesis in primary producers, which in turn sustains all higher trophic levels in global ecosystems.

Rationale: An ecotone is a zone of junction or a transition area between two biomes or ecosystems, often exhibiting high species diversity known as the edge effect.

Rationale: Producers = 10,000 J. Primary consumers (herbivores) = 1,000 J (10%). Secondary consumers (carnivores) = 100 J. Tertiary consumers = 10 Joules.

Rationale: In aquatic ecosystems, phytoplankton have a very high turnover rate and short lifespan compared to zooplankton, leading to an inverted pyramid of biomass where total consumer biomass exceeds producer biomass at any given moment.

Rationale: Frederic Clements proposed the monoclimax theory, stating that every region has only one climatic climax community toward which all communities are heading.

Rationale: Biomass refers to the total mass of organisms in a given area or volume, usually measured as dry weight.

Rationale: Carrying capacity represents the maximum population size of a species that the environmental resources of a given ecosystem can sustain indefinitely.

Rationale: The limnetic (or euphotic) zone of a lake receives sufficient sunlight for net photosynthesis by phytoplankton.

Rationale: Phosphorus lacks a significant gaseous phase in its cycle; it mainly moves through water, soil, and rock.

Rationale: Decomposers, such as fungi and bacteria, break down dead organic matter, recycling nutrients back into the ecosystem.

Rationale: Norwegian philosopher Arne Naess coined the term 'deep ecology' in 1973 to advocate for the intrinsic value of all living beings regardless of their instrumental utility to humans.

Rationale: The tundra biome features permafrost (permanently frozen subsoil), low precipitation, and short vegetation like mosses and lichens.

Rationale: Gross Primary Productivity (GPP) is the total rate of organic matter production by photosynthesis per unit area and time.

Rationale: Joseph Grinnell first introduced the concept of the ecological niche in 1917, focusing primarily on the habitat and spatial distribution requirements of a species.

Rationale: Primary succession begins in lifeless areas such as regions devoid of soil or newly formed volcanic islands.

Rationale: In a parasitic food chain, a single plant or large herbivore supports numerous parasites, which in turn support hyperparasites, creating an inverted pyramid of numbers.