Abiotic variables found in terrestrial ecosystems can include things like rain, wind, temperature, altitude, soil, pollution, nutrients, pH, types of soil, and sunlight. The boundaries of an individual abiotic factor can be just as unclear as the boundaries of an ecosystem.These are often referred to as abiotic factors. Abiotic factors are non-living elements found within an ecosystem. There are six abiotic factors that affect plant growth: air, water, space, temperature, light and soil (nutrients).The two most important abiotic factors affecting plant primary productivity in an ecosystem are temperature and moisture.
LEARNING OBJECTIVE[ edit ]
Identify the abiotic factors that affect plant growth
KEY POINTS[ edit ]
Primary production, on which almost all of life on earth is dependent, occurs through either photosynthesis or chemosynthesis. Annual biomass production, used to estimate net primary productivity by plants in an area, is directly influenced by an environment's abiotic factors, which include temperature and moisture. Warm and wet climates have the greatest amount of plant biomass because they offer conditions in which photosynthesis, plant growth, and the resulting net primary productivity are highest. TERMS[ edit ]
biomass the total mass of all living things within a specific area, habitat, etc.
eco-region a region, smaller than an ecozone, that contains a distinct biodiversity of flora and fauna
chemosynthesis the production of carbohydrates and other compounds using the oxidation of chemical nutrients as a source of energy rather than sunlight; it is limited to certain bacteria and fungi
The parts of the moon that are elevated and made up of jagged rocks are called the Lunar Highlands. These are actually the light-colored parts of the moon that we can see from Earth. These parts are made up of mountains. The darker parts that we see from Earth are the craters. The Highlands make up most of the near side of the moon (the part we can see). On the other side of the moon, called the far side, it is made up mostly of Islands, parts of the moon that are wide and said to be once covered in water.
According to Kepler's laws of planetary motion, the planets do not revolve around the Sun in exact circular orbits. The path of the planet or any other body in the solar system is elliptical, with the Sun at one of the foci. Though, the eccentricity is not large, so one can say, the path of the planets and the asteroids around the Sun is nearly circular.
For example, insects use wings to fly like bats and birds, but the wing structure and embryonic origin is completely different. These are called analogous structures... Some structures are both analogous and homologous: the wings of a bird and the wings of a bat are both homologous and analogous.
They are spherical sac-like organelles that contain lytic enzymes that destroy aged and unwanted cells. They contain hydrolytic enzymes that destroy GM2, gangliosides a class of glycosphingolipid that are produced by the nerve cells. Mutations in the HEXA gene that leads to the translation of hexosaminidase A causes the genetic abnormality, Tay-Sachs.
