Why might ocean ecosystems have more levels than terrestrial ecosystems?

Why are marine animals more diverse than terrestrial ones?

Open system. Marine systems are more open than terrestrial ones and dispersal of species may occur over much broader ranges. … These high dispersal capacities are often associated with very high fecundities and this has important consequences for their genetic structure and their evolution..

Are aquatic ecosystems less productive than terrestrial ones?

Terrestrial plants are less productive per unit standing biomass because growth rate declines with size in primary producers (Nielsen et al. … However, aquatic macrophytes also exhibit faster growth than terrestrial plants (Cebrian 1999).

Why are terrestrial ecosystems more diverse?

Terrestrial environments are generally far more physically complex, largely because of habitat provided by plants, both above and below ground. … This, in turn, provides far more habitat diversity over smaller spatial scales than exists in most marine environments.

Why do aquatic and terrestrial ecosystems differ in their pyramid of biomass?

In terrestrial ecosystems, energy and biomass pyramids are similar because biomass is closely associated with energy production. In aquatic ecosystems, the biomass pyramid may be inverted. The primary producers are phytoplankton with short life spans and high turnover.

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What are the characteristics of the terrestrial ecosystem that makes it different from an aquatic ecosystem?

Terrestrial ecosystems have some characteristics different from aquatic ecosystems—for example, the dominance of the detritus chain among grazing, detritus, and microbial chains; the rare cascading effect of predators on vegetation; the abundance of fungi; and so on.

What is the difference between a terrestrial ecosystem and a biome?

For an instance, a terrestrial ecosystem is an interaction between organisms and environment that are usually found only on land biomes such as tundra, taiga, temperate, forest, grassland and desert. … A biome is a large area that is usually characterized by similar climate and similar species.

Why do aquatic systems tend to have more trophic levels than terrestrial systems?

The water column itself absorbs and reflects a high proportion of incoming solar radiation before it can be fixed in photosynthesis. Thought the efficiency of energy transfer between trophic levels is usually greater in aquatic systems as less biomass is locked up in bone and skeletal materials compared to to flesh.

Why are marine systems generally less productive than terrestrial systems?

The lower productivity of the ocean per unit area is due largely to poorer light penetration in water (2). … Thus, it is not surprising that marine environments—which are less locally productive, on average—have less overall biomass and a higher proportion of consumers than terrestrial environments.

Why are cooler marine ecosystems more productive than warmer ecosystems?

In the ocean, the surface water gets very warm and remember that warm water is less dense than cold. … In the fall as the surface waters cool off, they begin to mix with the waters beneath them, and this mixing, with the help of winter storms, stirs up nutrients. So the ocean is more productive in temperate zones.

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