(1), the authors suggested that species richness decreases at high levels of habitat diversity because the area available per habitat decreases [area–heterogeneity tradeoff hypothesis (AHTO)].
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).
Does species diversity decrease with altitude?
The idea that species diversity decreases as you move into higher elevations — after a potential peak at middle elevations — is one of the most recognized and general patterns in ecology, according to scientists. … “We find that the number of bird species decreases predictably with elevation.”
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).
How does high altitude affect ecosystems?
As altitude increases, temperature decreases. This is going to change the structure and composition of our biome. … Thus, altitude is going to affect both temperature and precipitation which will affect the composition of biome.
Does altitude affect plant diversity?
Dwarf shrub cover was the main driver of plant diversity, whereas elevation did not affect species richness or beta-diversity. These findings suggest that elevation directly influences V. myrtillus growth but not plant diversity.
How does altitude affect landscape?
The higher your garden’s elevation, the lower the air pressure. Air pressure has an effect on plant growth in a number of ways. Lower air pressure has less carbon dioxide, which plants need to grow, and it also means a slower rate of transpiration.
How can biodiversity be affected?
The main threats facing biodiversity globally are: destruction, degradation and fragmentation of habitats. reduction of individual survival and reproductive rates through exploitation, pollution and introduction of alien species.
How does elevation affect tree diversity?
Tree stem density and basal area increases with elevation while species richness decreases. Stem density and species richness both decrease with latitude.
Why species diversity is high in equatorial regions?
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.
How does biodiversity vary with latitude and altitude?
The decrease in diversity when moving from lower latitudes towards higher latitudes is referred to as Latitudinal Diversity Gradient. Generally it is observed that the diversity richness is more in the areas near the equator than at the poles. … Altitude also affects the diversity richness inversely.
Why does biodiversity increase towards the tropics?
The higher temperatures in the tropics cause higher rates of metabolism, ecological dynamics and coevolutionary processes, which generate and maintain higher biodiversity.
Why does biodiversity increase towards the equator?
There might be more biodiversity near the equator because it’s warmer year round, allowing organisms to continue growing. Locations away from the equator will have cold winters that will slow growth for microorganisms, plants and animals.
How does altitude affect the kind of vegetation soil type and crop production?
The more important factor limiting plants at higher elevations is the length of the growing season. … Plants can’t photosynthesize below a certain temperature threshold, but this varies across species. Many high-elevation plants are able to conduct photosynthesis at colder temperatures than low-elevation plants.
Why does the type of vegetation change with altitude?
Answer: Elevation may affect the type and amount of sunlight that plants receive, the amount of water that plants can absorb and the nutrients that are available in the soil. As a result, certain plants grow very well in high elevations, whereas others can only grow in middle or lower elevations.
Why is altitude important to the environment?
The altitude’s combination of little oxygen, strong winds, and frigid temperatures keeps the existence of plant and animal life to a minimum. Altitude, like elevation, is the distance above sea level. Areas are often considered “high-altitude” if they reach at least 2,400 meters (8,000 feet) into the atmosphere.