Ecosystems Ecosystems The plants and animals that are found in a particular location are referred to as an ecosystem. These plants and animals depend on each other to survive. In a delicate balance, these lifeforms help to sustain one another in regular patterns. As an example, consider what happens when a new plant or animal is introduced into an ecosystem where it did not before exist. Throughout the history of the Earth, the delicate balance found within ecosystems has been disrupted by natural disasters such as fires, floods, storms, volcano eruptions, and so forth.
The freshwater biome Online exhibits : The world's biomes The freshwater biome Freshwater is defined as having a low salt concentration — usually less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of high salt concentration (i.e., ocean). There are different types of freshwater regions: Ponds and lakes These regions range in size from just a few square meters to thousands of square kilometers. The topmost zone near the shore of a lake or pond is the littoral zone. The near-surface open water surrounded by the littoral zone is the limnetic zone. Plankton have short life spans — when they die, they fall into the deep-water part of the lake/pond, the profundal zone. Temperature varies in ponds and lakes seasonally. Streams and rivers These are bodies of flowing water moving in one direction. Wetlands Wetlands are areas of standing water that support aquatic plants.
Internet E-MAIL (ELECTRONIC MAIL) Every person has an e-mail address which takes the form of his or her name, the @ (at), and a domain name, such as jsmith@mammoth.com. The domain name contains the name of the person’s service provider or organization or provider and often its country, each separated by a dot. The domain name mammoth.com stands for Mammoth Corporation, which is a commercial organization (com). E-mail offers you more than a quick and easy way to send people written messages. It is possible to use e-mail to send computer data, such as word-processed documents and images. back to termsback to top SEARCH ENGINE You can locate useful or interesting web sites by using a search engine. back to terms back to top BACKBONE A network of routing computers – the Internet backbone – links organization and service providers. WEB SITE Every web site has an Internet address, which takes the form To visit a web site, your computer must have a browser.
Consumer-resource systems Figure 1. Consumer categories based on material eaten (plant: green shades are live, brown shades are dead; animal: red shades are live, purple shades are dead; or particulate: grey shades) and feeding strategy (gatherer: lighter shade of each color; miner: darker shade of each color). Consumer-resource interactions are the core motif of ecological food chains or food webs,[1] and are an umbrella term for a variety of more specialized types of biological species interactions including prey-predator (see predation), host-parasite (see parasitism), plant-herbivore and victim-exploiter systems. Classification of consumer types[edit] A fully inclusive nomenclature is shown in Figure 1. Specialist totivores (gatherers)[edit] Specialist olophages (miners)[edit] See also[edit] References[edit] Jump up ^ Bascompte, J. (2009).
Internet U.S. Army soldiers "surfing the Internet" at Forward Operating Base Yusifiyah, Iraq The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to link several billion devices worldwide. It is a network of networks[1] that consists of millions of private, public, academic, business, and government networks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies. The Internet carries an extensive range of information resources and services, such as the inter-linked hypertext documents and applications of the World Wide Web (WWW), the infrastructure to support email, and peer-to-peer networks for file sharing and telephony. Most traditional communications media, including telephony and television, are being reshaped or redefined by the Internet, giving birth to new services such as voice over Internet Protocol (VoIP) and Internet Protocol television (IPTV). Terminology Users
Creative writing and kids: How to encourage it - chicagotribune.com June 14, 2011|By Wendy Donahue, Tribune Newspapers Parents nowadays worry more about the creative writing their kids do on Facebook than the kind in English assignments. But even for 140-character Tweets, encouraging children to put ideas into words is as vital as ever, says Pen Densham, screenwriter of films such as "Robin Hood: Prince of Thieves" and a teacher at the University of Southern California. He shares his views on the role creative writing can play for children today. Q: Is creative writing an endangered skill in this tech age? A: No. Q: How can parents encourage creative writing in their children? A: Each kid is like an uncut diamond. Q: Why should adults encourage creative writing? A: It is important to embrace creativity for personal growth, not for an end result. We are traveling into a world where technology and humanity are changing at lightning speed. Money is not as important as being harnessed to a passion. Q: Can Facebook provide a real creative outlet?
What is Social Network Theory | LoveToKnow The question "what is social network theory?" is a misleading one. Technically, every interaction between more than two sources becomes a sort of social network - which is why social network analysis software can be used for everything from business organizations to contagious disease control. However, in recent years, with the development of Internet phenomena such as Facebook, social network theory (or SNT, as it is abbreviated) has become more and more focused on the many ways that people interrelate and communicate via the various social networking platforms. So What is Social Network Theory for the Internet? Basically there are two elements in any social network, online or offline: nodes and ties. The fact that these kinds of ties can vary in intensity and importance is just one of the many variables that can factor into social network theory. The Power of Connection Applications of Social Network Theory Other Focuses of Social Network Theory Post a comment
Smithsonian Civil War Studies: Article - A Pathway To Freedom: Maryland's Underground Railroad A Pathway To Freedom: Maryland's Underground Railroad The Smithsonian Associates Civil War E-Mail Newsletter, Volume 8, Number 6 Because of its location just below the Mason-Dixon Line, Maryland occupied a pivotal place in a secret network of trails and sanctuaries known as the Underground Railroad. Harriet Tubman completed the daring journey repeatedly during the 1800s, having escaped from a plantation in Dorchester County to become the railroad's most famous "conductor." In and around Cambridge, visitors can see the small church where Tubman worshipped, as well as a humble marker noting her approximate birthplace. West of the Chesapeake Bay, beyond sites like the Baltimore Civil War Museum and historic Hampton mansion (once the largest house in the country, where more than 340 slaves labored), the Sandy Spring Slave Museum features a slavery-era log cabin. Farther south, the Hollywood-based Sotterley Plantation has a rare slave cabin and outbuildings beside the Patuxent River.
Coh-Metrix The Text Easability Assessor provides percentile scores on five characteristics of text, including Narrativity, Syntactic Simplicity, Word Concreteness, Referential Cohesion, and Deep Cohesion. The five text easability scores are extracted from a wide range of linguistic features calculated by Coh-Metrix. The Text Easability Assessor allows educators to enter a short passage (of fewer than 1000 words) and view a profile of the passage. Simply log on and view your texts’ easability profiles!
Mathematics Illuminated | Unit 11 | 11.6 Ecosystems A food chain or food web is a graphic way of representing predator-prey and symbiotic relationships that exist in ecosystems. For most of this unit we have been focusing mainly on physical, human-made networks, such as our power grid, the Internet, and the nation's highway system. We have also looked briefly at intangible networks, such as webs of social connections. One common aspect of ecosystems is the food chain. A food chain provides a convenient way of obtaining a rough approximation of what happens in an ecosystem. Item 2919 /Neo Martinez, UNITED KINGDOM TROPHIC WEB (2005). Item 2920 / Neo Martinez, CARIBBEAN REEF TROPHIC WEB: IMAGE 1 (2005). Food webs are examples of directed graphs, because certain relationships are "one-way streets." Alternatively, remoras are fish that tend to attach themselves to sharks and feed off of scraps, bacteria, and feces. back to top Networks in nature are constantly changing. At each step in a food chain or web, a certain amount of energy is lost.
Smithsonian Institution Marine Science Network The Smithsonian Marine Science Network (MSN) was established in 1998. The MSN operates a unique array of laboratories and research vessels that spans the latitudinal gradient of the western Atlantic (Chesapeake Bay, Indian River Lagoon, Mesoamerican Barrier Reef and Panamanian Coast) and crosses the isthmus of Panama. The Network is dedicated to understanding the rich biodiversity and complex ecosystem dynamics that sustain coastal processes and productivity. MSN scientists study evolutionary, ecological, and environmental change in the ocean’s coastal zones, increasing scientific knowledge of these environments, and improving society’s appreciation of the ocean’s effect on our lives. Coastal environments are of immense economic and environmental importance and comprise 95% of the ocean’s fisheries. Overview of Marine Science Network Smithsonian Institution / Copyright / Privacy
Ecosystem History and development The term "ecosystem" was introduced by Arthur Roy Clapham in early 1930s and became more widely known via the works of Arthur Tansley, a British ecologist.[fn 1][10] Tansley devised the concept to draw attention to the importance of transfers of materials between organisms and their environment.[11] He later refined the term, describing it as "The whole system, ... including not only the organism-complex, but also the whole complex of physical factors forming what we call the environment".[12] Tansley regarded ecosystems not simply as natural units, but as mental isolates.[12] Tansley later[13] defined the spatial extent of ecosystems using the term ecotope. G. Ecosystem processes Ecosystems are controlled both by external and internal factors. Unlike external factors, internal factors in ecosystems not only control ecosystem processes, but are also controlled by them. Primary production Energy flow Left: Energy flow diagram of a frog. Decomposition Nutrient cycling