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Topic: Ecosystem


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In the News (Mon 23 Jul 18)

  
  Ecosystem Services: A Prime from the Ecological Society of America (ESA)
Ecosystem Services are the processes by which the environment produces resources that we often take for granted such as clean water, timber, and habitat for fisheries, and pollination of native and agricultural plants.
An ecosystem is a community of animals and plants interacting with one another and with their physical environment.
Ecosystem services are so fundamental to life that they are easy to take for granted and so large in scale that it is hard to imagine that human activities could destroy them.
www.actionbioscience.org /environment/esa.html   (1942 words)

  
 nsf.gov - Funding - Ecosystem Science - US National Science Foundation (NSF)
The Ecosystem Science Cluster supports research that advances our understanding of: 1) material and energy transformations within and among ecosystems, 2) the composition and structure of ecological systems, 3) ecosystem dynamics and trajectories of ecosystem development through time, and 4) linkages among ecosystems at different spatial and temporal scales.
Research on natural, managed and disturbed ecosystems is supported, including terrestrial, freshwater, wetland, coastal (including salt marsh and mangrove), and human-dominated environments.
Projects that are potentially transformative -- that is, those that may change the conceptual basis of ecosystem science and have broad implications for future research -- are given particular priority.
www.nsf.gov /funding/pgm_summ.jsp?pims_id=12822   (660 words)

  
 The Nature Conservancy in Canada - Ecosystem Based Management in the Great Bear Rainforest - Ecosystem of Great Bear ...
At the regional and community level, these ecosystem-based management plans will be matched with socio-economic plans that aim to generate income, enhance the health of cultures and communities, and provide for sustainable livelihoods.
It is, however, the first effort to apply integrated conservation and economic concepts across such a large and complex natural and social landscape.
It is also the first effort to expand ecosystem-based management into a broader policy and legislative context concerned equally with the health of ecosystems and human communities.
www.nature.org /wherewework/northamerica/canada/work/art16907.html   (750 words)

  
  Device Description Ecosystem
This is a social, commercial and technological ecosystem based on the exchange and management of device descriptions.
The presence of choice and competition in an ecosystem is considered to be beneficial.
In a successful DD ecosystem, the cost of deploying the repository would need to be met, most likely by those who derive benefit from its existence.
www.w3.org /TR/2005/WD-dd-ecosystem-20051121   (4069 words)

  
  Ecosystem - MSN Encarta
The ecosystem concept fits into an ordered view of nature that was developed by scientists to simplify the study of the relationships between organisms and their physical environment, a field known as ecology.
Every ecosystem is also characterized by a disturbance cycle, a regular cycle of events such as fires, storms, floods, and landslides that keeps the ecosystem in a constant state of change and adaptation.
The survival of natural ecosystems around the world is threatened by many human activities: bulldozing wetlands and clear-cutting forests—the systematic cutting of all trees in a specific area—to make room for new housing and agricultural land; damming rivers to harness the energy for electricity and water for irrigation; and polluting the air, soil, and water.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761582459   (1308 words)

  
  Ecosystem - Wikipedia, the free encyclopedia
In ecology, an ecosystem is a combination of all the living and non-living elements of an area.
Ecosystems are the smallest level of organisation in nature that incorporates both living and nonliving factors.
The abstract notion of ecological health attempts to measure the robustness and recovery capacity for an ecosystem; that is, how far the ecosystem is away from steady state.
en.wikipedia.org /wiki/Ecosystem   (630 words)

  
 USDA Forest Service - Valuing Ecosystem Services   (Site not responding. Last check: )
An ecosystem is a community of people, plants, animals, and microorganisms interacting with one another and their nonliving environment (water, soils, nutrients).
Markets for ecosystem services are based on the same premise: ‘Sellers’ are landowners that provide clean air, clean water, wildlife habitat, and other goods and services by sustainably managing their forests, wetlands, and grasslands.
Valuing ecosystem services presents an opportunity to promote public awareness of the importance of forests and grasslands to human well-being; provide an economic incentive for private landowners to own and sustainably manage their land; encourage ecological restoration; and inspire individual efforts to reduce consumption of natural resources and minimize human impact of ecosystems.
www.fs.fed.us /ecosystemservices/faq.shtml   (1276 words)

  
 Ecosystem valuation - Wikipedia, the free encyclopedia
Ecosystem valuation is a widely used tool in determining the impact of human activities on an environmental system, by assigning an economic value to an ecosystem or its ecosystem services.
The simplest form of ecosystem valuation is to hold that an ecosystem has a value equivalent to its ecological yield valued as it would be on commodity markets: for the value of water, wood, fish or game, that is purified or nurseried or generated or harboured in that ecosystem.
non-use value is the value attributed to the pure existence of an ecosystem and consists of three components: value based on the welfare the ecosystem may give other people; value based on the welfare the ecosystem may give future generations; and value based on knowing that the ecosystem exists.
en.wikipedia.org /wiki/Ecosystem_valuation   (770 words)

  
 Human Ecosystem Journal @ NaturalResearch.org (Natural Research)   (Site not responding. Last check: )
Central to the ecosystem concept is the idea that living organisms are continually engaged in a set of relationships with every other element constituting the environment in which they exist.
The human ecosystem concept is then grounded in the deconstruction of the human/nature dichotomy, and the emergent premise that all species are ecologically integrated with each other, as well as with the abiotic constituents of their biotope.
The human ecosystem unit of analysis is perhaps most often used by ecological anthropologist, and is apparent in the work of scholars such as Roy Rappaport, who has explored ritual cycles and communication within human ecosystems (Rappaport, 1999).
www.naturalresearch.org /encyclopedia/Human_ecosystem   (1055 words)

  
 Guidance for Ecosystem Approach Application
Therefore, ecosystem management must involve a learning process, which helps to adapt methodologies and practices to the ways in which these systems are being managed and monitored.
Ecosystem management should be envisaged as a long-term experiment that builds on its results as it progresses.
As noted in the description of the ecosystem approach, an ecosystem is a functioning unit that can operate at any scale, depending upon the problem or issue being addressed.
www.biodiv.org:680 /programmes/cross-cutting/ecosystem/operational.asp?print=1   (629 words)

  
 Nature Works - Ecosystems   (Site not responding. Last check: )
An ecosystem can be as large as a desert or a lake or as small as a tree or a puddle.
A healthy ecosystem has lots of species diversity and is less likely to be seriously damaged by human interaction, natural disasters and climate changes.
The third type of living organism in an ecosystem are the decomposers.
www.nhptv.org /natureworks/nwepecosystems.htm   (614 words)

  
 Concepts: Ecosystem
The notion of ecosystem recognises the many ways an organism interacts with and is dependent for its own survival on various parts of its environment.
The term ecosystem is typically used to describe the internal dependencies of the larger system especially as they pertain to a particular part.
Thus, ecosystem is almost a substitute for the term environment, but it emphasizes the existance of various parts of the environment, rather than the environment as a single entity.
necsi.org /guide/concepts/ecosystem.html   (349 words)

  
 Ecosystem Change : Level 1 - Summary of the Millennium Ecosystem Assessment
Ecosystems are particularly affected by large-scale fishing, freshwater use, and agriculture.
Degradation of ecosystem services is harming many of the world’s poorest and most vulnerable people, and is sometimes the main factor causing poverty.
Better theories and models are needed to understand the links between ecosystem change and impacts on human well-being and to assess the economic consequences of ecosystem change.
www.greenfacts.org /ecosystems   (2166 words)

  
 USGS Learning Web :: Explorers :: Ecosystems
An ecosystem is an area on the Earth that is a community of living organisms and their surrounding environment.
Ecosystems on Earth are incredibly diverse, both in size and in form-a large city that contains millions of people, their homes, and a built-up landscape is an urban ecosystem, while a small wildlife preserve within that city serves as a natural ecosystem.
Consider the value of one wetland ecosystem that helps remove toxic substances from drinking water, provides a nursery for baby fish, and supplies shelter for clams and mussels-and these are only a few of the services provided by this ecosystem.
interactive2.usgs.gov /learningweb/explorer/topic_eco.htm   (363 words)

  
 9(j) Introduction to the Ecosystem Concept
In topic 9d, an ecosystem was defined as a dynamic entity composed of a biological community and its associated abiotic environment.
Ecosystems are also always undergoing alterations to their biotic and abiotic components.
Ecosystems are composed of a variety of abiotic and biotic components that function in an interrelated fashion.
www.physicalgeography.net /fundamentals/9j.html   (989 words)

  
 ecosystem
Individual organisms interact with each other and with their environment in a variety of relationships, such as two organisms in competition, predator and prey, or as a food source for other organisms in a food chain.
However, major changes to an ecosystem, such as climate change, overpopulation, or the removal of a species, may threaten the system's sustainability and result in its eventual destruction.
Ecosystems can be large, such as the global ecosystem (the ecosphere), or small, such as the pools that collect water in the branch of a tree, and they can contain smaller systems.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0007997.html   (341 words)

  
 Ecosystem Conservation
Ecosystems are dynamic complexes of biotic communities and their associated abiotic environments interacting as functional units.
An ecosystem approach to conservation is the management of natural resources using systemwide concepts to ensure that all plants and animals in the ecosystem are maintained at viable levels in native habitats and basic ecosystem processes are perpetuated indefinitely (Clark and Zaunbrecher, 1987).
Another important aspect of an ecosystem approach to conservation is the ability to integrate ecosystem protection and restoration with human values and needs as a way to strengthen the connection between economic prosperity and environmental well being.
www.fws.gov /midwest/EcosystemConservation/ecosystem_approach.html   (505 words)

  
 Ecosystem
On a large scale, ecosystems have been defined on the basis of geographical extent alone (eg, arctic, tall-grass prairie or hardwood forest).
Etymologically the word ecosystem derives from the Greek oikos, meaning "home," and systema, or "system."; Nineteenth- and early 20th-century ecologists, who were well aware of the complex interdependence of living and nonliving matter, coined several terms, such as biocoenosis, microcosm, holocoen, biosystem and geobiocoenosis.
The ecosystem has usually been given the form of a triangle or a pyramid where the base represents the lowest level on the food chain and the peak the highest level.
www.thecanadianencyclopedia.com /index.cfm?PgNm=TCE&Params=A1ARTA0002519   (637 words)

  
 Ecosystem Initiatives
Ecosystem initiatives respond to the unique problems of targeted areas and communities and address environmental, economic, and social concerns.
Ecosystem initiatives help Canadians achieve environmental results through partnerships, pooling resources, focusing science, coordinating efforts, sharing information and experiences, and generating a broad basis of support.
Through ecosystem initiatives, Environment Canada is able to address priority areas and issues of concern — ensuring that Canadians have clean air and water, protecting and conserving nature, and taking action on climate change.
www.ec.gc.ca /ecosyst/backgrounder.html   (1446 words)

  
 Convention on Biological Diversity
The ecosystem approach is a strategy for the integrated management of land, water and living resources that promotes conservation and sustainable use in an equitable way.
As described by the Conference of the Parties, the ecosystem approach is the primary framework for action under the Convention.
The Conference of the Parties, at its Fifth Meeting, endorsed the description of the ecosystem approach and operational guidance and recommended the application of the principles and other guidance on the Ecosystem Approach (decision V/6).
www.biodiv.org /programmes/cross-cutting/ecosystem/default.asp   (196 words)

  
 Lesson1-2
An ecosystem is a group of living and nonliving parts within an environment and all the connections between those parts.
An ecosystem can be thought of as an imaginary web in which all the living and nonliving parts of an environment are connected together.
An ecosystem is the delicate state of balance between living and nonliving things in a particular environment.
museums.state.nm.us /nmmnh/SMNHC/lesson1-2.html   (1475 words)

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