User:O.Bolen/sandbox

Many citrus cultivars are seedless and are produced parthenocarpically without pollination. Some cultivars may be capable of producing fruit either way, having seeds in the segments, if pollinated, and no seeds if not. Citrus that requires pollination may be self-compatible, thus pollen must be moved only a short distance from the anther to the stigma by a pollinator.

taken from : wikipedia- fruit tree pollination

taken from : wikipedia - cultural eutrophication

These added nutrients result in excessive growth of plant life. Such an increase in an algae population is known as an algal bloom. Large amounts of algae reduce the amount of dissolved oxygen available in the water for other organisms, which increases fish mortality rates. These areas affected by algal blooms are known as dead zones, and are found where rivers empty into oceans. Nutrient pollution is a major cause of algal blooming however, the excess nutrients also facilitate the growth of other aquatic plants

Increased competition for the added nutrients can cause disruption to ecosystems and food webs, as well as a loss of habitat, and biodiversity of species