Erzsebet Frey

One of the major consequences of ecosystem dynamics relative to human influence is biomagnification. Biomagnification is the increasing concentration of persistent and toxic substances in organisms at each successive trophic level. These are fat-soluble substances that are stored in the fat reserves of every organism. Many substances have been shown to biomagnify, including classic studies …

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First, it is important because it represents the almost infinite diversity of plant and animal life and the diversity of types of ecosystems on Earth that support life as we know it. It allows people to survive in conditions that would otherwise result in harsh conditions. Things that support evolution and differentiation between the different …

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Effects of chemical pollution There are three main routes of exposure, or ways a substance can enter your body. • Breathing (inhalation): Inhalation of chemical gases, mists or dusts in the air. • Skin or Eye Contact: Contact of chemicals with skin or eyes. They can damage the skin or be absorbed through the skin …

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The ocean is the largest marine biome. It is a continuous body of saltwater relatively uniform in chemical composition mineral salts and decomposed biological matter. Ocean The ocean is divided into a few zones depending on the distance reached by light in the water. Each zone has a different group of species adapted to the …

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Freshwater biomes include lakes and ponds (stagnant water) and rivers and streams (flowing water). These include wetlands, which will be discussed later. LAKE AND PONDS Lakes and ponds are part of terrestrial landscapes and are therefore associated with abiotic and biotic factors affecting these terrestrial biomes. Lakes and ponds can vary in size from a …

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Bioremediation uses living organisms to remove or minimize contaminants from a polluted site. According to the US EPA, bioremediation is the treatment that uses natural organisms to break down chemicals into less toxic or non-toxic substances. Bioremediation is used to treat human wastewater as well to remove agricultural chemicals (pesticides and fertilizers) that leach from …

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A biodiversity hotspot is a method of identifying regions of the world where special attention is needed to fighting against the loss of biodiversity and stimulating investments for conservation, it is rich in many rare and endemic species. The idea first came from Norman Myers in 1988. Conservation International adopted the Myers hotspots as an …

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List of biodiversity hotspots around the world: North and Central America California Floristic Province Madrean Pine-oak woodlands Caribbean Island Mesoamerica North American Coastal Plain South America Cerrado Tropical Andes Atlantic Forest Chilean Winter Rainfall-Valdivian Forests Tumbes-Chocó-Magdalena Asia-Pacific Eastern Himalaya Western Ghats, India: Sri Lanka Indo-Burma, India, and Myanmar New Caledonia New Zealand Polynesia-Micronesia Japan East …

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Biologists estimate that species extinctions are currently 500 to 1,000 times higher than the normal or background rate observed earlier in Earth’s history. Sometimes is difficult to predict which species will disappear, many are listed as Vulnerable (Critically Endangered). However, many extinctions will affect species that biologists have yet to discover, for example, those species …

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A community dominated by one or two species is considered less diverse than a community in which several species have similar abundance. The Simpson’s Diversity Index is the measurement of diversity that considers the number of species present, and the relative abundance of each species. D = (n / N)2n As species richness and uniformity …

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