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Chapter 13 How Ecosystems Change
Chapter 13 How Ecosystems Change

... • Answer = The latitude of the ecosystem Latitude has a great influence on ecosystems because both moisture and temperature vary with the distance from the equator. The tropics are warm and moist and have long growing seasons with lost of rain. ...
Theory of Evolution by Natural Selection
Theory of Evolution by Natural Selection

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... Section 4.1: Adaptation, Variation, and Natural Selection No two organisms, even within the same species, are identical. Differences may be physical (observable) – colour, size, or physiological (metabolic functioning, not directly observable) – disease resistance, ability to tolerate stress. These ...
pdf - New Zealand Ecological Society
pdf - New Zealand Ecological Society

... ecologists, but it may not be important for the functional development of a community (Bullock and Hodder, 1997). What is important is the number of plant species used, the number of individuals, and which successional stage to start with. Spacing and design of planting are also important in that th ...
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... Climate, land features, and water are all part of a living thing’s environment. If an area has everything a living thing needs, it can be a habitat for that species. Many plants and animals usually share a habitat. Many small animals eat plants, and then some large animals eat the small animals. Spe ...
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BIOLOGY 1b SUMMARY SHEET - Downlands Community School
BIOLOGY 1b SUMMARY SHEET - Downlands Community School

... Organisms are well adapted to survive in their normal environment. Population size depends on a variety of factors including competition, predation, disease and human influences. Changes in the environment may affect the distribution and behaviour of organisms. You could be given exam questions base ...
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... thing I knew to the contrary, it had lain there for ever: … But suppose I had found a watch upon the ground, and it should be inquired how the watch happened to be in that place; I should hardly think of the answer which I had before given … . [And] For this reason, … that, when we come to inspect t ...
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Ecology Section - Olympic High School
Ecology Section - Olympic High School

... prey populations in a community and determine the places prey can live and feed. Note in a predator-prey diagram the population growth of the predator lags behind the population growth of the prey.  Diseases are considered predators. Don’t forget ...
Powerpoint - Michigan State University
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I. VOCABULARY: II. SPECIES RELATIONSHIPS:
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... What is Evolution? Evolution is a process of change through time. A change in species over time. Theories of evolution provide an explanation for the differences and similarities in structure, function, and behavior among life forms. Existing life forms have evolved from earlier ones, by gradual ch ...
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... Natural selection explains how evolution can occur There are four main principles to the theory of natural selection: Variation. Individuals of a species differ due to genetic variation. Heritable differences are the basis for natural selection. Overproduction. Organisms have more offspring than can ...
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... • Artificial selection- nature provides the variation among different organisms, and humans select those variations they find useful. – Ex. BREEDING ...
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Genes, environment and evolution

... • Not all the alleles that an individual has will necessarily be passed on to its offspring. For example, two organisms with genotype Aa might have two offspring, each with genotype AA. The a allele would therefore not be passed on. • The smaller a population, the greater the changes in allele frequ ...
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ch05_sec1

... • Organisms that get their energy by eating other organisms are called consumers. • A consumer is an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources. • Consumers are also called heterotrophs, or other-feeders. ...
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Ecology



Ecology (from Greek: οἶκος, ""house""; -λογία, ""study of"") is the scientific analysis and study of interactions among organisms and their environment. It is an interdisciplinary field that includes biology and Earth science. Ecology includes the study of interactions organisms have with each other, other organisms, and with abiotic components of their environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), and number (population) of particular organisms; as well as cooperation and competition between organisms, both within and among ecosystems. Ecosystems are composed of dynamically interacting parts including organisms, the communities they make up, and the non-living components of their environment. Ecosystem processes, such as primary production, pedogenesis, nutrient cycling, and various niche construction activities, regulate the flux of energy and matter through an environment. These processes are sustained by organisms with specific life history traits, and the variety of organisms is called biodiversity. Biodiversity, which refers to the varieties of species, genes, and ecosystems, enhances certain ecosystem services.Ecology is not synonymous with environment, environmentalism, natural history, or environmental science. It is closely related to evolutionary biology, genetics, and ethology. An important focus for ecologists is to improve the understanding of how biodiversity affects ecological function. Ecologists seek to explain: Life processes, interactions and adaptations The movement of materials and energy through living communities The successional development of ecosystems The abundance and distribution of organisms and biodiversity in the context of the environment.Ecology is a human science as well. There are many practical applications of ecology in conservation biology, wetland management, natural resource management (agroecology, agriculture, forestry, agroforestry, fisheries), city planning (urban ecology), community health, economics, basic and applied science, and human social interaction (human ecology). For example, the Circles of Sustainability approach treats ecology as more than the environment 'out there'. It is not treated as separate from humans. Organisms (including humans) and resources compose ecosystems which, in turn, maintain biophysical feedback mechanisms that moderate processes acting on living (biotic) and non-living (abiotic) components of the planet. Ecosystems sustain life-supporting functions and produce natural capital like biomass production (food, fuel, fiber and medicine), the regulation of climate, global biogeochemical cycles, water filtration, soil formation, erosion control, flood protection and many other natural features of scientific, historical, economic, or intrinsic value.The word ""ecology"" (""Ökologie"") was coined in 1866 by the German scientist Ernst Haeckel (1834–1919). Ecological thought is derivative of established currents in philosophy, particularly from ethics and politics. Ancient Greek philosophers such as Hippocrates and Aristotle laid the foundations of ecology in their studies on natural history. Modern ecology became a much more rigorous science in the late 19th century. Evolutionary concepts relating to adaptation and natural selection became the cornerstones of modern ecological theory.
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