What things threaten biodiversity

What things threaten biodiversity:

Around the world, habitats are shrinking due to human activities like farming, logging, and building. This habitat destruction has caused species to go extinct, resulting in a loss of biodiversity.Many human actions, if not properly managed, can cause pollution and overuse resources, which destroys habitats. Loss of these habitats—the ecosystems where these plants and animals get their water, food, and shelter—is the primary reason for biodiversity’s decline. Some experts estimate that a major extinction on a scale approximating the loss of dinosaurs may be approaching—and it would be the first ever caused by human activity. Once a species has been lost, it’s lost forever, and with it, the crucial role it played in the web of life. According to many scientists, extinction is speeding up at an alarming rate, and thousands of species may be vanishing each year. Below is a list of things that cause biodiversity loss:

●Over-hunting and over-fishing: Marine and terrestrial animals are removed and populations shrink or disappear altogether—and not only the ones that are hunted and fished, but other species that relied on the complex interactions interrupted by the removal of one component of the web.

●Cutting down forests for lumber: When we cut down large expanses of trees and uproot plants, this results in flooding, mudslides, and an increase in pollution.  It also removes habitat and refuge for countless species of birds, animals, and insects that cannot survive without their forest homes intact.

●converting forests to pasture:  This not only destroys habitat and causes erosion, but can be a major source of pollution.  High concentrations of livestock means high concentrations of poop, and unless that poop is used as compost or combustible material (in industrial ganaderias, it is not), toxic compounds leech into the soil and water, poisoning life forms and contaminating drinking water.

●Fragmenting habitats:  When ecosystems are broken up or fragmented by highways, farmlands, and other forms of development, populations of plants and animals that once interacted are cut off from each other.  Oftentimes, this causes populations to shrink to such a small size that they eventually disappear altogether.

●Filling in wetlands for urban development:  This removes the important ecosystem service of filtering water and preventing floods, as well as eliminates unique habitats rich in species biodiversity.

●Polluting waterways:  Dumping waste into rivers, lakes, and oceans has drastic effects on the aquatic species that live in them.  Factories, non-organic industrial farms, highly concentrated ganaderias, and large boats all contribute to waterway pollution.

●Air pollution: By polluting the air, we are also polluting the water.  This is because water exists as tiny particles in the sky, and these particles pick up pollution in the air from car exhaust and other sources of smog.  When the water forms droplets and falls from the sky as rain, it carries the pollution with it.  This is called acid rain, because rain contaminated with air pollution becomes acidic, and damages life forms that it falls on.

●Cultivating a low diversity of crops:  When we plant only a few varieties of food crops and abandon the richness of crop biodiversity that our ancestors worked hard to provide us with over thousands of years, this can result in a permanent loss in agrobiodiversity.  GM crops are the worst example of this, because GM crops contain NO genetic biodiversity!  Moreover, they can cross-pollinate with native or traditional strains of the same species, reducing the genetic diversity of the entire species.  This is a huge concern right now with the case of GM corn in Mexico, because it has the potential to wipe out all of the native strands of corn that have been the foundation of mesoamerican culture for thousands of years.  Low crop diversity also increases vulnerability to outbreaks of pests and crop diseases.

●Using herbicides, fungicides, insecticides, and other pesticides:  Spraying these chemicals on crops only allows a very small number of species to survive, undermining the interconnections that should be present in a healthy agroecosystem.

Diversidad geneticaDiversidad especieDiversidad de ecosistemaDiversidad cultural | ¿Donde se encuentra la biodiversidad?¿Como estan interconectado la diversidad biologico y la cultura?¿Porque esta importante la diversidad biologica?¿Que cosas pone la diversidad biologica en peligro?¿Que podemos hacer para preservar la diversidad biologica?

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