Why does biodiversity decrease with latitude?

Species density is higher in the tropics (low latitude) than in temperate regions (high latitude) resulting in a latitudinal biodiversity gradient (LBG).

Does species diversity decrease with latitude?

Species richness, or biodiversity, increases from the poles to the tropics for a wide variety of terrestrial and marine organisms, often referred to as the latitudinal diversity gradient (LDG).

How does biodiversity vary with altitude and latitude?

Biodiversity varies with a modification in altitude or latitude. The range will increase as we have a tendency to move from high to low altitudes (from poles to equator).

What causes latitudinal gradients in diversity?

Latitudinal Gradients. … Many different processes have been suggested to explain such gradients including competition, predation, mutualism, parasitism, and host diversity, but the most convincing explanation is that the diversity gradient follows the gradient of solar energy.

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How does altitude affect biodiversity?

Environmental gradients such as altitude are also known to affect biodiversity and may interact with anthropogenic forces that shape ecosystem function. Higher altitudes are associated with a decline in species richness in many groups of animals, including insects (Lawton, Macgarvin & Heads 1987; Hodkinson 2005).

What is the relationship between latitude and species diversity?

Explanation: This idea is also referred to as the latitudinal diversity gradient, meaning that as you move from the equator towards the poles, diversity lessens. This pattern is one of the oldest observed in ecology.

What is the relationship between diversity and latitude quizlet?

What is the relationship between diversity and latitude? As latitude increases, moving away from the equator at the center of the Earth toward either the North Pole or the South Pole, biodiversity decreases.

Why does diversity among species decline as we move away from the equator?

Speciation is generally a function of time and environmental stability, so if conditions are too harsh, it is difficult for the species to survive and adapt. This results in decrease in biodiversity towards the poles. Species diversity decreases as we move away from the equator towards the poles.

Does biodiversity increase with increasing precipitation?

According to the study, plant diversity is expected to increase where it becomes wetter. This is probably because the seeds of the species found there may have a better chance of germinating and becoming established.

Why does species diversity increase towards the equator?

A new study led by Oxford Earth Sciences’ Associate Professor Erin Saupe suggests that higher species diversity in equatorial regions may be caused by higher rates of speciation (the formation of new and distinct species in the course of evolution), driven by changes in precipitation across space and through time.

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What causes latitudinal gradients in species diversity evolutionary processes and ecological constraints on swallowtail biodiversity?

We conclude that the LDG is caused by (1) climatically driven changes in both clades based on evidence of responses to cooling and warming events, and (2) distinct biogeographical histories constrained by tropical niche conservatism and niche evolution.

What do you mean by latitudinal gradients what could be the possible reasons for diversity between tropic and temperate region?

What could be the possible reasons for diversity between tropic & temperate region? Ans. Latitudinal gradient in diversity means that species diversity usually decreases as we move away fromequator towards the poles, Tropic area of latitudinal range 23.50c harbor more species than temperate orpolar area.

How have periods of glaciation influenced latitudinal patterns of diversity?

How have periods of glaciation influenced latitudinal patterns of diversity? Glaciations have severely reduced diversity in northern temperate, boreal, and Arctic ecosystems, compared to tropical ecosystems.

What are current threats to biodiversity?

Five main threats to biodiversity are commonly recognized in the programmes of work of the Convention: invasive alien species, climate change, nutrient loading and pollution, habitat change, and overexploitation.

How does altitude affect landscape?

In a plant’s case, water molecules evaporating into the oxygen and carbon dioxide molecules of air. If air has higher humidity with higher concentrations of water, the slower the diffusion from the leaf. The drier the air and lower humidity, the faster the diffusion and transpiration.

How do rivers affect the biodiversity of an area?

Large dams fragment rivers and habitats, isolating species, interrupting the exchange of nutrients between ecosystems, and cutting off migration routes. They reduce water and sediment flows to downstream habitat, and can decimate a river’s estuary, where many of the world’s fish species spawn.

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