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Ecology
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Ecology (from Ancient Greek οἶκος (oîkos) 'house' and -λογία ( -logía) 'study of') is the natural science of the relationships among living organisms and their environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere levels. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and is the study of abundance, biomass, and distribution of organisms in the context of the environment. It encompasses life processes, interactions, and adaptations; movement of materials and energy through living communities; successional development of ecosystems; cooperation, competition, and predation within and between species; and patterns of biodiversity and its effect on ecosystem processes. Ecology has practical applications in conservation biology, wetland management, natural resource management ( agroecology, agriculture, forestry, agroforestry, fisheries, mining, tourism), urban planning ( urban ecology), community health, economics, basic and applied science, and human social interaction ( human ecology). The word ecology ( German: Ökologie) was coined in 1866 by the German scientist Ernst Haeckel. The science of ecology as we know it today began with a group of American botanists in the 1890s. Evolutionary concepts relating to adaptation and natural selection are cornerstones of modern ecological theory. Ecosystems are dynamically interacting systems of organisms, the communities they make up, and the non-living ( abiotic) components of their environment. Ecosystem processes, such as primary production, nutrient cycling, and niche construction, regulate the flux of energy and matter through an environment. Ecosystems have biophysical feedback mechanisms that moderate processes acting on living ( biotic) and abiotic components of the planet. Ecosystems sustain life-supporting functions and provide ecosystem services 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. ( Full article...) Selected article -Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world. The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change. ( Full article...) Selected image -Credit: Lynn Betts, USDA Natural Resources Conservation Service
Topsoil is the upper, outermost layer of
soil, usually the top 2 inches (5.1 cm) to 8 inches (20 cm). It has the highest concentration of
organic matter and
microorganisms and is where most of the
Earth's
biological soil activity occurs. Pictured: Terraces, conservation tillage, and conservation buffers save soil,
control erosion and improve water quality on this Iowa farm. 1999.
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Motion camouflage is camouflage which provides a degree of concealment for a moving object, given that motion makes objects easy to detect however well their coloration matches their background or breaks up their outlines. The principal form of motion camouflage, and the type generally meant by the term, involves an attacker's mimicking the optic flow of the background as seen by its target. This enables the attacker to approach the target while appearing to remain stationary from the target's perspective, unlike in classical pursuit (where the attacker moves straight towards the target at all times, and often appears to the target to move sideways). The attacker chooses its flight path so as to remain on the line between the target and some landmark point. The target therefore does not see the attacker move from the landmark point. The only visible evidence that the attacker is moving is its looming, the change in size as the attacker approaches. ( Full article...) Selected biography -Crawford Stanley "Buzz" Holling, OC FRSC (December 6, 1930 – August 16, 2019) was a Canadian ecologist, and Emeritus Eminent Scholar and Professor in Ecological Sciences at the University of Florida. Holling was one of the conceptual founders of ecological economics. ( Full article...) Did you know (auto-generated)
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Selected publication -Le Naturaliste Canadien is a Canadian French-language peer-reviewed scientific journal published semiannually by the Société Léon-Provancher d'Histoire Naturelle du Canada. The journal publishes articles on all topics of natural sciences with a specific focus on ecology and conservation biology in Quebec. The journal also acts as the official publication of the society. The journal is the oldest scientific publication in French in North America and one of the oldest scientific journals still in publication in Canada. ( Full article...) Related portalsMore did you know -Related articlesAssociated WikimediaThe following Wikimedia Foundation sister projects provide more on this subject:
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