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Topic: Indicator species

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Indicator species Indicator species are unique environmental indicators as they offer a signal the biological condition in a watershed or ecosystem and are a warning system that has entered the food web. Indicator species of forested plant associations on national forests of northwestern Washington (SuDoc A 13.2:Sp 3) The term indicator species is a bit as indicators are often whole groups or of living beings.While indicator species is a that is often used it is somewhat Indicators are actually whole groups or flora/fauna which can be used to assess environmental www.freeglossary.com /Indicator_species   (341 words)

SIBW/Outils/IndVal/home Indicator species are defined as the most characteristic species of each group, found mostly in a single group of the typology and present in the majority of the sites belonging to that group. Since indicator species give ecological meaning to groups of samples, this method provides criteria to compare typologies, to identify where to stop dividing clusters into subsets, and to point out the main levels in a hierarchical classification of samples. The new method identifies indicator species for typologies of ecological samples obtained by any hierarchical or non-hierarchical classification procedure; its use is independent of the classification method. mrw.wallonie.be /dgrne/sibw/outils/indval/home.html   (1083 words)

Frogs an Early Indicator of Global Disaster species and 23 percent of all mammal species are threatened. The world’s amphibian species are under unprecedented assault and are experiencing tens of thousands of years worth of extinctions in just a century, according to the most comprehensive study ever conducted. At least 34 amphibian species are known to be extinct, while at least another 113 species have not been found in recent years and are possibly extinct. www.solcomhouse.com /frogs.htm   (4352 words)

indicator species - Hutchinson encyclopedia article about indicator species Some lichens are sensitive to sulphur dioxide in the air, and absence of these species indicates atmospheric pollution. Plant or animal whose presence or absence in an area indicates certain environmental conditions, such as soil type, high levels of pollution, or, in rivers, low levels of dissolved oxygen. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. encyclopedia.farlex.com /indicator+species   (136 words)

The UK 'Quality of Life' wild bird indicator - The Royal Society for the Protection of Birds The headline indicator is generated by combining the trends of widespread bird species (111 in the last update) across the UK, for which annual or periodically collected data on numbers are available. Despite encouraging signs of recovery in some of the farmland species that have seen large declines since the 1970s (eg tree sparrows), species such as corn buntings and turtle doves continue to decline and the farmland indicator remains at less than 60% of its 1970 value. If an index rises to 200 then, on average, populations of species in that indicator have doubled; if it falls to 50 then they have halved. www.rspb.org /birds/sotukb/wildbirdindicator.asp   (880 words)

The Trevey - A Unit of Lasting Forests In a nut-shell, featured-species and indicator species approaches have been of service, but a better approach may be that of a type of biodiversity as so often included under an "ecosystem management" philosophy. Management indicators representing overall objectives for wildlife, fish, and plants may include species, groups of species with similar habitat relationships, or habitats that are of high concern. Species may occur over a wide range of ecological conditions (the solid line in species A) or be narrowly restricted to where it may live or attain suitable conditions for survival (the short distance for species B). fwie.fw.vt.edu /rhgiles/Trevey/Indicator_Species.htm   (4657 words)

Lichen-Feeding Moths as Bioindicators of Air Pollution Depending on research objectives, some lichen species may be problematic as indicators of short term changes because of their slow growth, and because compounds from past pollution exposure may persist in cells over time. Some limited a priori categorization of species in our region may be possible using information from these and other studies, providing valuable insights on the determination of indicator species. For this study, the lichen species Usnia nigrens and Rhizoplaca chrysoleuca were selected as potential indicator species. www.colostate.edu /Depts/Entomology/courses/en570/papers_1996/simonson.html   (3647 words)

EPA - About Biological Indicators An ecological indicator is defined here as a measure, an index of measures, or a model that characterizes an ecosystem or one of its critical components. An indicator is a sign or signal that relays a complex message, potentially from numerous sources, in a simplified and useful manner. The primary uses of an indicator are to characterize current status and to track or predict significant change. www.epa.gov /bioindicators/html/about.html   (368 words)

DIALOG Dissertation Abstracts Indicator values for Saprobity, Oxygen requirements, Trophic state and Nitrogen uptake metabolism were higher in Kisat than in Nyando and Kibos, and they tended to increase with eutrophication, increase in ionic content and organic loading downstream where a few species tolerant to pollution, such as Nitzschia palea dominated the community. Species richness and diversity were enhanced in “clean water” and were significantly correlated with altitude, width of the river channel, depth, and current velocity, volume of discharge and dissolved oxygen. The results of this study indicate that diatoms can be useful indicators of “ecological” water quality in the Lake Victoria basin and that they can be employed in biomonitoring, to supplement the routine physical and chemical methods and for management purposes. www.aslo.org /phd/dialog/200206-14.html   (541 words)

UK Govt Sustainable Development - Indicators Comparisons between regions, and between regions and the overall national position, also need to be interpreted with caution, because geographical variations in the numbers of species recorded in the BBS mean that each regional indicator covers a different subset of the species covered by the UK or England indicator. This fact does not invalidate the regional indicator, which properly reflects the changes in the populations of the common birds found in that region, but can mean that indicators of the changes in regional populations, taken together, appear to contradict the indicator of the change at national level. Birds are regarded as good indicators of the broad state of wildlife and the countryside, because they are wide-ranging in habitat distribution and tend to be at or near to the top of the food chain. www.sustainable-development.gov.uk /indicators/regional/2003/h13.htm   (1017 words)

Indicator plant When assessing by observation of indicator species however it good practice to observe plant communities or populations of indicator species rather than individual which may not be typical. Waterlogged or poorly drained land is indicated the presence of species such as mosses creeping buttercup and horsetail or bog loving plants including sedges rushes marsh marigold marsh orchid or flag iris. Freshwater Wetlands : A Guide to Common Indicator Plants of the Northeast www.freeglossary.com /Indicator_plants   (317 words)

Indicator species -- Facts, Info, and Encyclopedia article Most indicator species are (Any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills) fish, (Any animal lacking a backbone or notochord; the term is not used as a scientific classification) invertebrates, periphyton and macrophytes. The term indicator species is a bit misleading, as indicators are often whole groups of flora/fauna types which can be used to assess environmental condition. Indicator species -- Facts, Info, and Encyclopedia article www.absoluteastronomy.com /encyclopedia/i/in/indicator_species.htm   (108 words)

* Species - (Bonsai): Definition Species that grow very quickly are not really suitable for bonsai, their wild growth is simply too hard to tame. The species should be one in which the flowers, fruits and foliage remain in scale as the tree is dwarfed... Species are divisions within a botanical of organisms that are very closely related. en.mimi.hu /bonsai/species.html   (1225 words)

Indicator Species and Endangered Species In the case of the peppered moth being an indicator species, the presence of pollution (and dark moth) would indicate that additional abiotic stress is being placed on the organisms who live in that polluted (and usually less favourable) environment. These species that can leave clues about the state of the ecosystem are known as indicator species, because they indicate the state of the local environment. Biston betularia, otherwise known as peppered moth, is a species that can adapt to polluted environments more suitably as a result of an adaptation changing the colour of them to suit their environment, as explained in the natural selection page of the genetics tutorial. www.biology-online.org /4/6_monitoring_populations_2.htm   (446 words)

ASK Archive 1997: Various questions on whales Basically, an indicator species, often a microorganism or a plant, serves as a measure of the environmental conditions that exist in a given locale. Re: The orca as an indicator species - this is a tougher one, mainly since the concept of an 'indicator species' is a strictly define term in ecology. It is not necessarily inaccurate to say that the orca is highly visible, closely entwined with their environment and therefore problems we see with their population indicates serious habit destructions, etc. But this is indeed true of all species in the world. whale.wheelock.edu /archives/ask97/0469.html   (849 words)

Milwaukee River Basin Indicators Project She also indicated that she would be creating a matrix that would list all of the draft indicators and show which of the six categories each of the indicators could apply to. One of the WDNR project managers indicated that she would be taking all of the indicators developed by the small groups for each of the six categories and rewriting them into a format that was consistent across all categories. The Milwaukee River Basin GMU was chosen to pilot an alternative approach to indicator development. www.dnr.state.wi.us /org/gmu/milw/indicators.html   (10132 words)

ENVIRONMENTAL ASSESSMENT for the VERDE RIVER HEADWATERS RIPARIAN RESTORATION DEMONSTRATION PROJECT The effects of each alternative on the management indicator species identified for each of these management areas follows. Status indicates whether the species is known to occur (present), has been known to occur in the past (historical record), or has potential habitat present on the project area. The species is locally uncommon among arid plateaus and desert mountains from 6,000 to 7,000 feet elevation (Ferris and Brown 1981). www.fs.fed.us /r3/coconino/nepa/verde_river_5_19.html   (13809 words)

Environmental Assessment Proposed Mule Park Land Exchange Management indicator species were identified for each of the management areas described in the Coconino LMP (1987). Overall, this decrease in acreage is insignificant at a forest-wide level and would not contribute to population or habitat trends for management indicator species for MA 3 or MA 6. Table 10 describes the management indicator species and the vegetation types they are indicators for that occur in the analysis area. www.fs.fed.us /r3/coconino/nepa/2002/mule_park_land_exchange.shtml   (11100 words)

indicator - Hutchinson encyclopedia article about indicator The commonest chemical indicators detect changes in pH (for example, litmus and universal indicator) or in the oxidation state of a system (redox indicators). Now, instead of reversing the levers, I had pulled them over so as to go forward with them, and when I came to look at these indicators I found that the thousands hand was sweeping round as fast as the seconds hand of a watch--into futurity. The grouped letters stood out heavily black, around the pivot-head of the indicator, emphatically symbolic of loud exclamations: AHEAD, ASTERN, SLOW, Half, STAND BY; and the fat black hand pointed downwards to the word FULL, which, thus singled out, captured the eye as a sharp cry secures attention. encyclopedia.farlex.com /indicator   (256 words)

Glossary Searched Term A species whose status provides information on the overall condition of the ecosystem and of other species in that ecosystem; taxa that are sensitive to environmental conditions and which can therefore be used to assess environmental quality. 64.95.130.5 /Glossary/Glossary.cfm?TermEnglish=indicator%20species   (180 words)

The National AgLaw Reporter, National Agricultural Law Center The court noted that the EA contained a summary table of population trends for all of the indicator species at issue as well as an analysis of potential impacts to the habitat of those species. The court stated that the Forest Service was "required to monitor the population trends" of indicator species. Sierra Club argued that the Forest Service violated the National Forest Management Act, 16 U.S.C. § 1604(i), and its implementing regulations by failing to maintain population data for five of the indicator species within the project area. www.nationalaglawcenter.org /assets/cases/sierra-bosworth4.html   (429 words)

Carolinian Indicator Species Certain typical or 'indicator species' that are characteristic of the Carolinian zone can help you appreciate the uniqueness of Carolinian ecosystems and your own land. This species has a distinct spicy fragrance which is emitted from the leaves, branches and bark when crushed. The tulip-tree is one of two wild magnolia species found in Canada, and probably one of the most common `Carolinian Canada' symbols. www.carolinian.org /FactSheets_IndSpecies.htm   (992 words)

markfloegel.org » The Indicator Classes Biologists refer to plants and animals which serve this function as “indicator species.” A canary in a coal mine is an artificial indicator species, as canaries do not occur naturally in coal mines. I suppose it would be inaccurate to say indicator species, as humans are all one species. When an ecosystem is placed under stress, some plant or animal - some indicator species - will be the first to die off. www.markfloegel.org /index.php?p=24   (517 words)

MTNHP Plants - Search Wetland Indicator Species Search for wetland indicator species that are known to occur in a specified county. Search for the Wetland Indicator Status of a single or group of species in both the Northern Plains Region and Northwest Regions of the state. Species may have different indicator values for a given region. nhp.nris.state.mt.us /plants/SearchWetlands.html   (346 words)

Becker, Barbara: Indicator Plants for Sustainable... Indicator species can be applied successfully for site reconnaissance at the local level, or for site comparisons at regional level within the same eco-region. Altitude and soil factors (pH, calcium carbonate, organic matter and clay) primarily determine weed species composition, while management factors can hardly be assessed by indicator species at the level of resolution investigated in the present study. The concept of indicator plants suggests that the plant community at a given site reflects rather precisely the environmental conditions of that site. www.margraf-verlag.de /shop/infos/1364.htm   (260 words)

THE USE OF BIOLOGICAL INDICATORS OF HEAVY METAL CONTAMINATION IN ESTUARIES with special reference to an assessment of the biological availability of metals in estuarine sediments from south-west Britain Results for the burrowing indicator species are compared with those for other benthic species which have been used as indicators of the availability of metals in estuarine waters. Three burrowing species, the polychaete Nereis diversicolor and the deposit-feedinq bivalves Scrobicularia plana and Macoma balthica, have been evaluated as indicators of the availability of metals in estuarine sediments. Surveys with these species indicate that the biological availability of most metals differs by orders of magnitude between the sediments from uncontaminated and contaminated sites. www.fwr.org /environw/dwi0703.htm   (452 words)

03-4080 -- Utah Environmental Congress v. Bosworth -- 06/23/2004 As the Ninth Circuit has observed, "[t]he use of management indicator species is intended to allow the [Forest] Service to thoroughly evaluate the effects of the [forest management] alternatives on fish and wildlife populations by using a 'class representative,' without having to evaluate each species individually." Inland Empire, 88 F.3d at 762. Two groups of indicator species are utilized in the Fishlake Management Plan; one group serves as "ecological indicators," (2 AR Doc. These high interest species were selected because of their threatened, endangered, or sensitive status, or because of high public interest in the species. www.kscourts.org /ca10/cases/2004/06/03-4080.htm   (5146 words)

A Pilot Test of Indicator Species to Assess Uniqueness of Oak-Dominated Ecoregions in Central Tennessee We used tree indicator species occurring on 438 plots in the Plateau counties of Tennessee to test the uniqueness of four conterminous ecoregions. Additional analysis revealed that the largest ecoregion could be subdivided into northern and southern zones based on frequency of occurrence of five other indicator species. Multinomial logistic regression indicated that the presence of 14 tree species allowed classification of sample plots according to ecoregion with an average overall accuracy of 75 percent (range 45 to 94 percent). www.treesearch.fs.fed.us /pubs/6502   (261 words)

Nature of Things: Indicator Species An example of a negative indicator of trust within an organisation might be the % of emails containing 'bcc" field entries. Posted by Matt at December 6, 2004 06:22 PM Comments www.anecdote.com.au /nature-of-things/archives/2004/12/indicator_speci.html   (31 words)

High Country News -- May 27, 1996: Frogs: The ultimate indicator species High Country News -- May 27, 1996: Frogs: The ultimate indicator species More than 130 species of amphibians and reptiles are listed as threatened or endangered worldwide and 10 of those are frogs and salamanders in the United States. Now that the 13-month freeze on listing species ended early this month, the U.S. Fish and Wildlife Service must tackle a backlog of hundreds of species that need protection; the first species Interior Secretary Bruce Babbitt is expected to list is the California red-legged frog. www.hcn.org /1996/may27/dir/Feature_Frogs_The.html   (722 words)

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