Human Impacts on island ecosystems. (Australia) There are few paleovegetation records in Australia before 18‚000 years ago. To find out the history of the Australian fauna scientists used stable carbon isotopes from the emu eggshell (a flightless bird native to Australia). The samples were largely taken from Lake Eyre. The carbon composition of the eggshell tells us the composition of the bird’s diet (over 3-5 days). The emus are mixed feeders herbivores‚ eating leaves‚ shoots‚ fruits‚ flowers
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of that particular finch changed from eating insects to eating seeds‚ so it allowed the two finches to coexist in the same ecosystem. 4. The levels of ecological organization are: 1) Organism 2) species 3) population 4) community 5) ecosystem 6) biomes 7) biosphere 5. 1. Competition-Organisms struggle‚ fight or search for the same basic needs and becomes more intense when basic needs become limited. Normally‚ they will compete for shelter‚ nesting sites‚ food‚ sunlight‚ minerals‚ and breeding partners
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1. 2. carrying capacity the maximum number of a species or “load” that can be sustainably supported by given environment. k and r strategist reproduction K-Strategists (human)– species that are slow growing and produce few‚ large offspring that mature slowly R-Strategists (oyster)– species that grow and mature quickly and produce many small offspring R- and K- selection theory suggests that natural selection may favour individuals with a high reproductive rate and rapid development over
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individual habitats and ecosystems can be easily destroyed. This combination of specialisation and interdependence increases the overall fragility and vulnerability of this biome Fragile environments can be exploited in different ways‚ and for different reasons. For example the Amazon Rainforest‚ an equatorial tropical rainforest biome‚ has been significantly exploited for its agricultural potential and natural resources; cattle ranching‚ soya bean and palm oil plantations‚ mining and timber. The most
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Tourism- Evolution‚ trends and growth; a report by FICCI Adventure tourism market report by The adventure travel trade association and Xola Consultancy www.4psbusinessandmarketing.com – Market interview by Amol Dhillon( VP strategy and planning‚ Woodland) www.adventure18.com
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Chapter 1 Ancient America Before 1492 I. Archaeology and History 1. Differences between Archaeologists and Historians—Both study the past‚ but they employ different methods; archaeologists focus on physical objects such as bones and pots‚ while historians focus on writing. 2. Writing and Language as Evidence—Writing is defined as a system of symbols that record spoken language; originated 8‚000 years ago in China‚ Egypt‚ and Central America. Ancient Americans invented spoken languages‚ moved
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G1‚ G2 & G3 // 5.1‚ 5.2‚ 5.3 5.1.1 Define species‚ habitat‚ population‚ community‚ ecosystem and ecology Species: A group of organisms that can interbreed and produce fertile‚ viable offspring Habitat: The environment in which a species normally lives or the location of a living organism Population: A group of organisms of the same species who live in the same area at the same time Community: A group of populations living and interacting with each other in an area Ecosystem: A community
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ecosystem. An ecosystem is a dynamic‚ stable environment which is composed of interacting and functioning biotic and abiotic components and can be of any size. There can be composed of variety of successions‚ such as lithoseres in grassland and woodland areas for example the Isle of Aaron‚ psamoseres along the coastline or small scale urban successions in urbanised areas. In an ecosystem‚ all the component are characterised as biotic‚ for example animals and plants‚ or abiotic for example climate
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GCSE Geography Unit 1- Dynamic Planet Brief overview study guide Please use this booklet with caution – it is designed to give a summary of some of the key ideas and point you in the right direction for case studies. It does not however cover everything and has little case study detail. A full revision programme also needs: Revision using your notes Ensuring you understand key terms and can give definitions of them. Learning key facts about case studies Completion of past
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around 30‚000bc. During the Stone Age it is believed that these people crossed a land bridge across what is now the Bering Strait during the Pleistocene age. The Mohawks are a Native North American tribe of the Iroqoian family and of the Eastern Woodlands culture area. They were once the eastern and leading people of the five Nations of the Iroqoian Confederacy. The
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