Climate Effects on Human Evolution This article explores the hypothesis that key human adaptations evolved in response to environmental instability. This idea was developed during research conducted by the Smithsonian’s Human Origins Program. Natural selection was not always a matter of ‘survival of the fittest’ but also survival of those most adaptable to changing surroundings. (Illustrations for this article coming soon.) Background Paleoanthropologists – scientists who
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Chapter 9: Ecosystem Approach Variation of Forests in Their Age‚ Makeup‚ and Origins A. 2 Major Types of Natural Forests 1. Old-growth/ Primary -uncut/ regenerated forest that has not been seriously disturbed by human activities/ natural disasters for 200 years or more - reservoirs of biodiversity (provide ecological niches for a variety of wildlife species) 2. Second- growth - stand of trees resulting from secondary ecological succession B. Tree Plantation/ Tree Farm/ Commercial Forest
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Endangered Animals of India : Endangered Animals of India Nataraj M.B. Department of Zoology. What is an endangered animal? : What is an endangered animal? A species is called endangered when there are so few of its kind left that it could disappear from the planet altogether and become ’extinct.’ Extinct means an animal hasn’t been seen in the wild for 50 years. In total 762 plant and animal species are now recorded as extinct. IUCN RED LIST : IUCN RED LIST The IUCN Red List of Threatened
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Leon and the Great Roar There once was a great lion called Leon he was the mighty king of the African Savanna. He was always helping all of the other animals with things like chasing out the other lions that were hunting down the other animals. The animals of the Savanna had all banded together to create a small animal village. Leon had lived on the top of a cliff where he watched over everyone and protected them from danger. Leon was always helping everyone either watching over the young animals
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a climax community. Land Biomes A biome is an environment that has a charcteristic climax community. The Earth is made up of two main biomes: land biomes and aquatic biomes. The major biomes are the tundra‚ taiga‚ temperate decidous forest‚ grassland‚ tropical rainforest‚ and desert. Tundra Tundras are the northermost biomes. They have nearly no tress and are covered
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behaviors make these among the most familiar animals to people. Zebra stripes have entered and left the fashion world and the once almost instinct equus is a well-known and revered animal to us. They can be found in a variety of habitats‚ such as grasslands‚ savannas‚ woodlands‚ thorny scrublands‚ mountains and coastal hills. They are great runners achieving speeds of up to 40 mph. Although the zebra is considered a horse there are many difference as there are similarities. Zebra’s physical characteristics
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destroyed. In order to maintain a fragile environment dynamic sustainability needs to be established. An example of a fragile environment is the Serengeti National Park and Jau National Park. The Serengeti National Park is situated in the Tropical Grassland biome. This means that it has temperatures are high throughout the year averaging at around 28OC. There are wet and dry seasons due to the movement of the ITCZ (Inter Tropical Conversion Zone). In the Serengeti there are long periods of drought during
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How far has the acceleration of economic growth produced environmental deterioration in China? China is one of the world’s economic powerhouses as it became large enough to influence the world market‚ dynamic enough to contribute to the world’s economy and sufficiently open to trade and capital flows to have a major impact on other countries. With the world’s largest current account surpluses and foreign exchange reserves and economic growth that have averaged at 10% the past thirty years‚ China’s
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jlsgsgbsdbSingapore’s Biodiversity Singapore‚ by virtue of its geographical location‚ has rich biodiversity‚ in spite of its intense urbanisation. Dry land tropical rainforests‚ mangroves and coral ecosystems are some of the key habitats found in Singapore. Singapore is a city-state with a land area of about 710 km. It is one of the most densely populated countries in the world and yet‚ harbours rich native biodiversity‚ both terrestrial and marine. The wealth of biodiversity can be attributed
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Uruguay 1. What kind of geographical characteristics does your country have? What are they called? The country of Uruguay is mostly rolling plains and low hills. Most of the low-lying landscape is grassland which is great for cattle and sheep raising. The Río de la Plata (in Spanish Silver River) is the estuary formed by the combination of the Uruguay River and the Parana River. The Silver River is wide‚ shallow‚ and cloudy. It is the widest estuary in the world. It is a funnel-shaped bay on
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