Habitatfragmentation as the name implies, describes the emergence of discontinuities fragmentation in an organism s preferred environment Habitat ecology habitat , causing population fragmentation . Habitatfragmentation can be caused by geological processes that slowly alter the layout of the physical ... . Definition The term habitatfragmentation includes five discrete phenomena Reduction in the total area of the habitat Decrease of the interior edge effect edge ratio Isolation of one habitat fragment ... record. ref name SahneyBentonFerry2010LinksDiversityVertebrates For example, habitatfragmentation ... SahneyBentonFerry2010LinksDiversityVertebrates Human causes Habitatfragmentation is frequently caused ..., resulting in extreme habitatfragmentation. Implications One of the major ways that habitatfragmentation ..., boreal forests, oceans, marshlands, etc. for all organisms in an ecological niche. Habitatfragmentation .... Thus fragmentation of habitat is an important cause of species extinction. ref name Rosenzweig Population ... to habitatfragmentation url journal Biology Letters Biol. Lett. volume 1 issue 1 pages 13 6 ref Additionally, habitatfragmentation leads to edge effect s. Microclimactic changes in light, temperature ... implications Habitatfragmentation is often a cause of species becoming threatened or endangered . The existence of viable habitat is critical to the survival of any species, and in many cases the fragmentation ... . One solution to the problem of habitatfragmentation is to link the fragments by preserving or planting ... Laboratory Simulations of habitatfragmentation and population genetics online at Monash University ... expanded other DEFAULTSORT HabitatFragmentation Category Habitats Fragmentation Category ... pl Fragmentacja siedliska pt Fragmenta o de habitat simple Habitatfragmentation ... much faster and causes extinction s of many species. Image Grasp africa.jpg thumb right Fragmentation and destruction of Great Ape habitat in Central Africa , from the http www.globio.info region ... more details
TOCright wiktionary fragmentation fragmented Fragmentation and similar may refer to In biology Fragmentation reproduction , a form of asexual reproduction Fragmentation cell biology Habitatfragmentation Population fragmentation Music Fragmented album , the debut album from the Filipino independent band Up Dharma Down Other Fragmentation chemistry , a technique to study structure of molecules Fragmentation computer a phenomenon of computer storage Fragmentation economics , a process of globalisation Fragmentation music , a compositional technique Fragmentation sociology , a term used in urban sociology Fragmentation weaponry , a feature of explosive weaponry File system fragmentation Feudal fragmentation IP fragmentation , a process in computer networking a synonym for hadronization with regard to quark s In waste management, breaking up waste materials see Waste management Fragmentation blasting , the quantification by photoanalysis of blasted material See also Divergence Fragment disambiguation Separation disambig bg cs Fragmentace de Fragmentierung fr Fragmentation id Fragmentasi he pl Fragmentacja simple Fragmentation sk Fragment cia uk ... more details
Habitatfragmentation fragmented habitats of the African Elephant . Image RangeMap Lmarinus.jpg ... s. A habitat which is Latin for it inhabits is an ecological or Natural environment environmental ... Habitats and Ecosystems url http www.fi.edu tfi units life habitat habitat.html publisher The Franklin ..., while it is possible to describe the habitat of a single black bear, it is also possible that one ... population and occupy a certain biogeographic al area. Further, this habitat could be somewhat different from the habitat of another group or population of black bears living elsewhere. Thus it is neither the species nor the individual for which the term habitat is typically used. Microhabitat ... organism or population. Monotypic habitat The monotypic habitat occurs in botanical and zoological ... starthistle, Centaurea solstitialis , is a botanical monotypic habitat example of this, currently ... its home range predator control, is a zoological monotypic habitat example. Even though its name may seem to imply simplicity as compared with polytypic habitats, the monotypic habitat can be complex ... implication of exotic plant induced habitat url http cat.inist.fr ?aModele afficheN&cpsidt 20189959 ... Portal box Environment Ecology Earth sciences Biology Deforestation Habitat conservation Habitat destruction HabitatfragmentationHabitat garden Natural landscape Natural resource Passenger Pigeon References Reflist External links wiktionary Wikisource1911Enc habitat Biology nav modelling ecosystems ... Human habitats Category Habitat ecology terminology Category Environmental terminology Category Systems ecology ar an Habitat bg ca H bitat cs Are l biologie da Habitat de Habitat et Elupaik es H bitat eo Habitato ekologio fa fr Habitat cologie hi id Habitat it Habitat he jv Habitat la Biochor lt Buvein mk ms Habitat nl Habitat ja no Habitat nn Habitat oc Abitat pl Siedlisko biologia pt Habitat ro Habitat ru ... more details
Population fragmentation is a form of population segregation. ref Citation last Proctor first Michael F. last2 McLellan first2 Bruce N. lastauthoramp yes last3 Strobeck first3 Curtis year 2002 title Population Fragmentation of Grizzly Bears in Southeastern British Columbia, Canada journal Ursus volume 8 issue pages 153 160 doi jstor 3873196 . ref It is often caused by habitatfragmentation . Population fragmentation causes inbreeding depression , which leads to a decrease in genetic variability in the species involved. ref name ProctorMcLellan Citation last Proctor first M. F. last2 McLellan first2 B. N. last3 Strobeck first3 C. lastauthoramp yes last4 Barclay first4 R. M. R. year 2005 title Genetic analysis reveals demographic fragmentation of grizzly bears yielding vulnerably small populations journal Proceedings of the Royal Society B volume 272 issue 1579 pages 2409 2416 doi 10.1098 rspb.2005.3246 pmid 16243699 pmc 1559960 . ref This decreases the fitness of the population for several reasons. First, inbreeding forces competition with relatives, which decreases the evolutionary fitness of the species. ref name ProctorMcLellan Secondly, the decrease in genetic variability causes an increased possibility a lethal homozygous recessive trait may be expressed this decreases the average litter size reproduced, indirectly decreasing the population. ref name KrebsCJ Citation last Krebs first C. J. year 2009 title Ecology The Experimental Analysis of Distribution and Abundance edition 6th publisher Benjamin Cummings location San Francisco isbn 9780321507433 . ref References references Category Habitats Fragmentation Category Habitat ecology terminology Category Landscape ecology Category Extinction Category Conservation biology Category Conservation reliant species Category Ecological restoration Category Environmental issues with conservation ... more details
mergefrom Rainforest collapse date April 2011 Forest fragmentation is a form of habitatfragmentation , occurring when forests are cut down in a manner that leaves relatively small, isolated patches of forest known as forest fragments or forest remnants . The intervening matrix that separates the remaining woodland patches can be natural open areas, farmland, or developed areas. Following the principles of island biogeography , remnant woodlands act like islands of forest in a sea of pastures, fields, subdivisions, shopping malls, etc. ref name SahneyBentonFerry2010LinksDiversityVertebrates cite journal url http geology.geoscienceworld.org cgi content abstract 38 12 1079 author Sahney, S., Benton, M.J. & Falcon Lang, H.J. year 2010 title Rainforest collapse triggered Pennsylvanian tetrapod diversification in Euramerica journal Geology volume 38 pages 1079 1082 format PDF doi 10.1130 G31182.1 issue 12 ref Natural Causes of Forest Fragmentation Forests may also be fragmented by natural processes such as fire and changes in climate. ref name SahneyBentonFerry2010LinksDiversityVertebrates cite journal url http geology.geoscienceworld.org cgi content abstract 38 12 1079 author Sahney, S., Benton, M.J. & Falcon Lang, H.J. year 2010 title Rainforest collapse triggered Pennsylvanian tetrapod ... implications Forest fragmentation is one of the greatest threats to biodiversity in forests, especially ... and Conservation of a Fragmented Forest id ISBN 0300084838 ref The problem of habitat destruction that caused the fragmentation in the first place is compounded by the inability of individual forest ... interior habitat. ref name Harris cite book last Harris first Larry D. year 1984 title The Fragmented ... of Chicago Press id ISBN 0226317633 ref The effect of fragmentation on the flora and fauna of a forest ... is much greater than the single forest. References references DEFAULTSORT Forest Fragmentation Category ... and sustainability Category Habitat ecology terminology Category Land management Forestry stub ... more details
Fragmentation is a type of Dissociation chemistry chemical dissociation . Fragmentation of a molecule can take place by a process of heterolysis or homolysis . It is a phenomenon observed in mass spectrometry where it is used as a tool to find the structural formula of a molecule, process called structural elucidation . It can occur in the ion source in source fragmentation where it is generally not a desired effect. Ion source conformation is an important criterium in the level of fragmentation observed. Desired fragmentation is made in the collision zone post source fragmentation of a tandem mass spectrometry tandem mass spectrometer . It is a part of gas phase ion chemistry and there are different types of mass fragmentation collision induced dissociation CID , electron capture dissociation ECD , electron transfer dissociation ETD electron detachment dissociation EDD , photodissociation , particularly infrared multiphoton dissociation IRMPD and blackbody infrared radiative dissociation BIRD , surface induced dissociation SID , charge remote fragmentation , Higher energy C trap dissociation HCD . The certain structures favour fragmentation the Alpha cleavage cleavage and the McLafferty rearrangement are two examples for the often observed fragmentations. See also Mass chromatogram Mass spectrum analysis Tandem mass spectrometry External links http www.chemguide.co.uk analysis masspec fragment.html Fragmentation patterns in the mass spectra of organic compounds mass spectrometry Category Tandem mass spectrometry analytical chem stub ... more details
The Internet Protocol IP implements datagram fragmentation , so that packets may be formed that can pass through a link with a smaller maximum transmission unit MTU than the original datagram size. RFC 791 describes the procedure for IP fragmentation, and transmission and reassembly of datagrams. ref RFC 791, Internet Protocol , Information Sciences Institute September 1981 ref RFC 815 describes a simplified reassembly algorithm. ref RFC 815, IP Datagram Reassembly Algorithms , David D. Clark July 1982 ref The Identification field, and Fragment offset field along with Don t Fragment and More Fragment flags in the IP protocol header are used for fragmentation and reassembly of IP datagrams. In a case ... bytes must be deliverable without the need to use IPv6 fragmentation. If a receiving host receives ... Implications of NAT November 2000 ref IP fragmentation can cause excessive retransmissions ... A. Kent, Jeffrey C. Mogul url http www.cs.binghamton.edu nael classes cs528 fragment.pdf title Fragmentation ... the path MTU between two IP hosts, so that IP fragmentation can be avoided. IPv4 and IPv6 differences The details of the fragmentation mechanism, as well as the overall architectural approach to fragmentation, are different between IPv4, the first official version of the Internet Protocol, and IPv6, the newer version. In IPv4, routers perform fragmentation, whereas in IPv6, routers do not fragment ... formats are different for IPv4 and IPv6, analogous fields are used for fragmentation, so the algorithm can be reused for fragmentation and reassembly. In IPv4, hosts must make a best effort attempt ... for IPv4. See also IPv4 Fragmentation and reassembly IPv4 fragmentation and reassembly IPv6 packet Fragmentation IPv6 fragmentation IP fragmentation attacks References reflist External links http penguin.dcs.bbk.ac.uk academic networks network layer fragmentation index.php IP Fragmentation http www.tech faq.com packet fragmentation.shtml What is packet fragmentation? DEFAULTSORT Ip Fragmentation ... more details
A Grob fragmentation , named for the British chemist Cyril A. Grob , is an elimination reaction taking ... Grob fragmentation general.svg center 400px Scheme 1. Grob fragmentation align center Grob fragmentation History An early instance of fragmentation is the dehydration of di tert butyl carbinol yielding .... class wikitable align center File Grob fragmentation Whitmore 1933.svg center 400px Fragmentation Whitmore align center Fragmentation reaction Whitmore 1933 Albert Eschenmoser in 1952 investigated the base catalysed fragmentation of certain Aldol adduct beta hydroxy ketones ref cite DOI 10.1002 hlca.19520350532 ref class wikitable align center File Grob fragmentation Eschenmoser 1952.svg center 400px Fragmentation Eschenmoser 1952 align center Fragmentation reaction Eschenmoser 1952 The original ... by sodium metal. According to reviewers Prantz and Mulzer in 2010 the name Grob fragmentation ... cr900386h ref class wikitable align center File Grob fragmentation Grob 1955.svg center 200px Grob fragmentation 1955 align center Grob fragmentation 1955 Reaction mechanism The reaction mechanism varies with reactant and reaction conditions with the fragmentation taking place in a concerted reaction .... Scope An example of a Grob like fragmentation in organic synthesis is the expansion of the Wieland ... in THF to borane 5 only one substituent displayed for clarity . The Grob fragmentation to 6 ... boron byproduct is trimethyl borate ref class wikitable align center File Grob fragmentation applic Thapsigargin.svg center 400px Scheme 2. Grob like fragmentation align center Scheme 2. Grob like fragmentation in Thapsigargin synthesis Another example is an epoxy alcohol fragmentation reaction ... fragmentation has been applied in the synthesis of the fragrance muscenone scheme 3 ref cite DOI ... wikitable align center File Grob fragmentation Fehr 2010.svg center 400px Scheme 3. R,Z 5 Muscenone synthesis align center Scheme 3. R,Z 5 Muscenone synthesis See also Eschenmoser fragmentation Wharton ... more details
Image MK2 grenade DoD.jpg frame right 150px Grooved body of a Second World War era U.S. Mk 2 grenade . The grooves covering the exterior of the grenade cause it to break into many pieces upon explosion. citation needed date December 2010 clarify are the grooves not for grip? date December 2010 A fragmentation grenade commonly known as a frag is an anti personnel weapon that is designed to disperse Fragmentation weaponry shrapnel upon exploding. The body is made of hard plastic or steel. Flechettes , notched wire, ball bearings or the case itself provide the fragments. When the word grenade is used without specification, and context does not suggest otherwise, it is generally assumed to refer to a fragmentation grenade. These grenades were sometimes classed as defensive grenades because the effective casualty radius of some matched or exceeded the distance they could be thrown, thus necessitating them being thrown from behind cover. The Mills bomb or F1 grenade Russia F1 grenade are examples of defensive grenades where the 30 45 m casualty radius ref uk icon http armor.kiev.ua army hist f 1.shtml ref matched or exceeded the 30 m that a grenade could reasonably be thrown. An example of offensive use is that Soviet Army paratroopers during the cold war were trained to throw fragmentation grenades from an altitude of about 100 m if the ground below them was held by enemy forces. Modern fragmentation grenades such as the United States M67 grenade have a wounding radius of 15 m half that of older style grenades, which can still be encountered and can be thrown about 40 m. Fragments may travel more than 200 m. ref Federation of American Scientists. http www.fas.org man dod 101 sys land m67.htm M67 FRAGMENTATION HAND GRENADE ref References references DEFAULTSORT Fragmentation Grenade Category Fragmentation grenades Fragmentation grenades nl Scherfhandgranaat pl Granat od amkowy fi Sirpalekranaatti ... more details
April 2011 In computer storage , fragmentation is a phenomenon in which storage space is used inefficiently ... to denote the wasted space itself. There are three different but related forms of fragmentation external fragmentation, internal fragmentation, and data fragmentation. Various storage allocation schemes exhibit one or more of these weaknesses. Fragmentation can be accepted in return for increase in speed or simplicity. Memory fragmentation Basic principle Fragmented memory denotes all of the system s unusable free memory. Memory fragmentation usually occurs when memory is allocated dynamically ... of stacks. The memory allocator wastes memory in the following ways 1. Overhead 2. Internal Fragmentation 3. External Fragmentation. When blocks of memory are allocated during runtime, it is highly ... memory, results in memory fragmentation. For example, consider a system having 5 MB total memory. Let ... of internal and external memory fragmentation. Types of memory fragmentation Image fragmentation.jpg border width100px xheight50px center Memory fragmentation in a system Overhead The memory allocator ... to wastage of memory. Hence, it is considered as a part of memory fragmentation. Internal fragmentation ... fragmentation called file slack , slack space , or cluster overhang . ref cite web url http ... fragmentation . This may be reclaimed by lossless data compression compressing the text if it is long ... of fragmentation, internal fragmentation is difficult to reclaim usually the best way to remove ... internal fragmentation by spreading the space overhead over a larger number of objects. External fragmentation External fragmentation is the inability to use free memory as the free memory is divided ... in size than this free block. External fragmentation also occurs in file systems as many files of different ... larger than B s size. As compared to external fragmentation, overhead and internal fragmentation account for little loss in terms of wasted memory and reduced performance. External fragmentation ... more details
The Eschenmoser fragmentation , first published in 1967, is the chemical reaction of , epoxy ketone s 1 with aryl sulfonylhydrazines 2 to give alkyne s 3 and carbonyl compounds 4 . ref cite journal author A. Eschenmoser, D. Felix and G. Ohloff title Eine neuartige Fragmentierung cyclischer , unges ttigter Carbonylsysteme Synthese von Exalton und rac Muscon aus Cyclododecanon Vorl ufige Mitteilung year 1967 journal Helvetica Chimica Acta volume 50 issue 2 pages 708 713 doi 10.1002 hlca.19670500232 ref ref cite journal author J. Schreiber, D. Felix, A. Eschenmoser, M. Winter, F. Gautschi, K. H. Schulte Elte, E. Sundt, G. Ohloff, J. Kalovoda, H. Kaufmann, P. Wieland and G. Anner title Die Synthese .... Crowe and Robert L. Dehn title A novel fragmentation reaction of , epoxyketones the synthesis of acetylenic ... musk s. Hence, the reaction is also known as Eschenmoser Ohloff fragmentation . In the same ... also refer to it as the Eschenmoser Tanabe fragmentation . Image Eschemoser Fragmentation Scheme.png center 450px The Eschenmoser fragmentation Several examples exist in the literature, ref OrgSynth title Fragmentation of &alpha &beta Epoxyketones to Acetylenic Aldehydes and Ketones Preparation of 2,3 Epoxycyclohexanone and its fragmentation to 5 Hexynal author Dorothee Felix, Claude Wintner, and A. Eschenmoser ... mechanism The mechanism of the Eschenmoser fragmentation begins with the condensation of an , epoxyketone ... the fragmentation, and thus the fragmentation is catalyzed by acid s or base chemistry bases . Most ... transfer leads to intermediate 4 , which undergoes the key fragmentation to alkyne 6 and the corresponding ... Fragmentation Mechanism.png center 700px The reaction mechanism of the Eschenmoser fragmentation Besides this standard course, there is also a radical variant of this , enone alkynone fragmentation ... 2655 2660 doi 10.1002 hlca.19790620815 title A New ?,? Enone ? Alkynone Fragmentation. Syntheses of exaltone ... leads to low yields of the classical Eschenmoser fragmentation. See also Grob fragmentation Wharton ... more details
Unreferenced date August 2008 In economics , fragmentation means organization of Production, costs, and pricing production in which different stages of production are divided among different suppliers that are located in different countries. Now products traded between firms in different countries are components instead of final products. Final products may be sold to outside the region in which fragmentation happens East Asia n countries often sell their final products to European Union Europe and the United States of America USA for example . Producers in less developed countries get positions of production chain that add less value to final product. Their challenge is to climb upwards on transnational production chain. Production chains are often vertical hierarchies in which big multinational companies may be those who sell final products and set production standards for lesser producers. This kind of fragmentation is an important part of contemporary globalization . References reflist Brakman, Gerritsen en Van Marwijk Category Production economics economics stub ... more details
DNA fragmentation is the separation or breaking of DNA strands into pieces. It can be intentional by laboratory personnel or the cells, or it can be spontaneous. Intentional Restriction digest is the intentional laboratory breaking of DNA strands. Apoptotic DNA fragmentation is a natural fragmentation that cells perform in apoptosis programmed cell death Spontaneous Spontaneous or accidental DNA fragmentation is fragmentation that gradually accumulates in a cell. It can be measured by e.g. Comet assay . The degree of DNA fragmentation can predict outcomes for in vitro fertilization ref cite journal author Simon L, Brunborg G, Stevenson M, Lutton D, McManus J, Lewis SE title Clinical significance of sperm DNA damage in assisted reproduction outcome journal Hum Reprod volume 25 issue 7 pages 1594 1608 year 2010 month May pmid 20447937 doi 10.1093 humrep deq103 url ref IVF and its expansion intracytoplasmic sperm injection ref name speyer ICSI . The sperm chromatin dispersion test SCD and TUNEL assay are both effective in detecting sperm DNA damage. ref name Zhang cite journal author Zhang LH, Qiu Y, Wang KH, Wang Q, Tao G, Wang LG title Measurement of sperm DNA fragmentation using bright field microscopy comparison between sperm chromatin dispersion test and terminal uridine nick end labeling assay journal Fertil. Steril. volume 94 issue 3 pages 1027 1032 year 2009 month June pmid 19505686 doi 10.1016 j.fertnstert.2009.04.034 url ref Using bright field microscopy , the SCD test appears to be more sensitive than the TUNEL assay. ref name Zhang Its main units of measurement is DNA fragmentation index DFI . ref name speyer cite journal author Speyer BE, Pizzey AR, Ranieri M, Joshi R, Delhanty JD, Serhal P title Fall in implantation rates following ICSI with sperm with high DNA fragmentation journal Hum Reprod volume 25 issue 7 pages 1609 1618 year 2010 month May pmid 20495207 doi 10.1093 humrep deq116 url ref A DFI of 20 or more significantly reduces the success rates after ... more details
unreferenced date September 2009 In urban sociology , fragmentation refers to the absence or the underdevelopment of connections between the society and the groupings of some members of that society on the lines of a common culture , nationality , Race classification of human beings race , language , occupation, religion , income level, or other common interests. This gap between the concerned group and the rest might be social, indicating poor interrelationships among each other economical based on Structural Inequality structural inequalities institutional in terms of formal and specific political, occupational, educative or associative organizations and or geographic implying regional or residential concentration. Category Sociological terms sociology stub fr Fragmentation urbaine ... more details
In music composition , fragmentation is the use of fragments or the division of a musical idea Musical gestures gesture , motif music motive , theme music theme , etc. into segmentation music segments . It is used in Tonality tonal and Atonality atonal music, and is a common method of localized musical development development and resolution music closure . Fragmentation is related to Arnold Schoenberg s concept of liquidation music liquidation , ref Schoenberg, Arnold. Fundamentals of Musical Composition . London, 1967. p. 58. ref a common musical technique compositional technique that describes the reduction of a large scale musical idea to its essential form such as a contour line, a specific harmonic motion, or the like . ref After Michael Friedmann, course lectures and materials for MUSI 305 Analysis and Composition of Twentieth Century Music, Yale College, Yale University, fall 2008. ref Liquidation informs much thematically driven music, such as that by B la Bart k ref Stein, Deborah. Engaging Music Essays in Music Analysis , Introduction to Musical Ambiguity . New York Oxford University Press, 2005. ISBN 0 19 517010 5. p. 87. ref , Stravinsky, and Schoenberg himself. It is important to understand that, though they are related, fragmentation and liquidation are separate processes and concepts. Further reading Caplin, William. Classical Form A Theory of Formal Functions , p. 10 11. References reflist Category Music theory music theory stub ... more details
Other uses Fragmentation disambiguation Fragmentation or clonal fragmentation in multicellular or colonial organisms is a form of asexual reproduction asexual reproduction or cloning where an organism is split into fragments. Each of these fragments develop into mature, fully grown individuals that are clones of the original organism. The splitting may or may not be intentional it may occur due to man made or natural damage by the environment or predators this kind of organism s may develop specific organs or zones that may be shed or easily broken off. If the splitting occurs without the prior preparation of the organism, both fragments must be able to regenerate the complete organism for it to function as reproduction. Fragmentation is as a method of reproduction is seen in many organisms such as filamentous cyanobacteria , mold s, lichens , many plants, and animals like sponges , Turbellaria acoel flatworms , some annelid worms, and sea star s. Fragmentation in various organisms Molds, yeast , and mushroom s, all of which are part of the Fungi kingdom biology kingdom , produce tiny ... see the section on Lichen Reproduction and dispersal reproduction in lichens . Plants Fragmentation ... detached from the colony,then fragmentation has occurred. There are several other mechanisms of natural fragmentation in plants. Production of specilized reproductive structures A few plants produce ... . Fragmentation is observed in nonvascular plants as well, for example in liverworts and mosses. Small ... use fragmentation to artificially propagate many plants via Division horticulture division , layering ... s, tuber s and rhizome s. Sponges also reproduce by fragmentation. Animals Animals like sponges ... types of coral colonies can increase in number by fragmentation that occurs naturally ref Cite journal ... Diego title Fragmentation in the branching coral Acropora palmata Lamarck growth, survivorship, and reproduction ... tolerant of fragmentation include Acropora , Montipora , Pocillopora , Euphyllia , and Caulastrea ... more details
Feudal fragmentation ref name G recki2007 cite book author Piotr G recki title A local society in transition the Henryk w book and related documents url http books.google.com books?id EzdSUYDdqQC&pg PA62 accessdate 23 May 2011 date 1 January 2007 publisher PIMS isbn 9780888441553 page 62 ref is a stage in the development of certain feudal states, in which it is split into smaller regional state structures, each characterized by significant autonomy if not outright independence and ruled by a high ranking noble such as a prince or a duke. ref name WIEM pl icon http portalwiedzy.onet.pl 94616,,,,rozbicie dzielnicowe,haslo.html Rozbicie dzielnicowe . WIEM Encyklopedia . ref ref name PWN pl icon http encyklopedia.pwn.pl index.php?module haslo&id 3969193 rozbicie dzielnicowe . Internetowa encyklopedia PWN PWN Encyklopedia . ref Feudal fragmentation is usually associated with European history around the Middle Ages . ref name FrankGills1996 Feudal fragmentation occurs after the death of the legitimate ruler leaves no clear heirs, and rulers of various subdivisions of the original state fail at electing or agreeing on a new leader for the previous, larger entity. In some cases for example, the Holy Roman Empire such a leader may be elected, yet wield much lesser powers than those of his predecessor. Feudal fragmentation is related to the concepts of agnatic seniority and principat Slavic principate . ref name PWN File TestamentKrzywoustego.png thumb right Fragmentation of Poland between ... in history of Poland , the fragmentation of Poland or regionalization ref name Davies2005 cite book ... of the Balkans in the history of Bulgaria , the late 14th century fragmentation of the Second Bulgarian ... to Samir Amin , feudal fragmentation has been mostly a European phenomenon and did not occur in the history ... ref At the same time, the term feudal fragmentation has been used in the context of history of China ... Feudal Fragmentation Category Divided regions Category Feudalism Category History pl Rozdrobnienie feudalne ... more details
Critical habitat is a habitat area essential to the conservation of a listed species , though the area need not actually be occupied by the species at the time it is designated. This is a specific term and designation within the U.S. Endangered Species Act ESA ref P.L. 93 205 ref Designation process Critical habitat must be designated for all threatened species and endangered species under the Endangered Species Act, with certain specified exceptions. Designations of critical habitats must be based on the best scientific information available in an open public process within specific timeframes. Considerations Before designating critical habitat, careful consideration must be given to the economic impacts, impacts on national security, and other relevant impacts of specifying any particular area as critical habitat. An area may be excluded from critical habitat if the benefits of exclusion outweigh the benefits of designation, unless excluding the area will result in the extinction of the species concerned. ref cite web url http www.nwr.noaa.gov Salmon Habitat Critical Habitat title ESA Critical Habitat publisher National Marine Fisheries Service accessdate 2009 08 12 ref If habitat land is Private property nonfederal , there must be a federal connection for the ESA to be triggered purely private actions are not covered. A federal agency with whom a landowner is dealing must ensure that its actions which may include giving a loan, increasing irrigation flows, etc. do not adversely modify these areas. See also Habitat Conservation Plan Habitat conservation Habitat corridor Habitat destruction Habitatfragmentation Restoration ecology References CRS article Report for Congress Agriculture A Glossary of Terms, Programs, and Laws, 2005 Edition url http ncseonline.org nle crsreports 05jun 97 905.pdf author Jasper Womach Footnotes Reflist Category Habitats Category Habitat ecology terminology Category Endangered species Category Environmental law Category Environmental terminology ... more details
first Mark title Operation Habitat Humatarian aid to the Kurdish refugees in northern Iraq journal ... diseases. Fragmentation weaponry Fragmentation injuries were also seen due to the vast number of land ... Mark title Operation Habitat Humatarian aid to the Kurdish refugees in northern Iraq journal The Medical ... first2 JV issue 11 12 ref By the time the ADF personnel had completed Operation Habitat on 30 June ... back to school. ref cite journal last Little first Mark title Operation Habitat Humatarian aid to the Kurdish ... Category Non combat military operations involving Australia Habitat it Operazione Habitat ... more details
In marine environments, a nursery Habitat ecology habitat is a subset of all habitats where juveniles of a species occur, having a greater level of productivity per unit area than other juvenile habitats Beck et al. 2001 . Mangroves, salt marshes and seagrass are typical nursery habitats for a range of marine species. Some species will use nonvegetated sites, such as Yellow Eyed Mullet, Blue Sprat and Flounder. Overview The nursery habitat hypothesis states that the contribution per unit area of a nursery habitat is greater than for other habitats used by juveniles for the species. Productivity may be measured by density, survival, growth and movement to adult habitat Beck et al. 2001 . There are two general models for the location of juvenile habitats within the total range for a species which reflect life history strategies of the species. These are the Classic Concept Juveniles and Adults in separate habitats. Juveniles migrate to adult habitat. General Concept overlap of juvenile and adult habitats. Some marine species do not have juvenile habitats, e.g. arthropods and scallops. Commonly fish, ells, some lobsters, blue crabs and so forth do have distinct juvenile habitats, whether with or without overlap with adult habitats. In terms of management, use of the nursery role hypothesis may be limiting as it excludes some potentially important nursery sites. In these cases the Effective Juvenile Habitat concept may be more useful. This defines a nursery as that which supplies ... and human harvesting. Determination In order to determine the nursery habitat for a species ..., it is suggested that alone, density does not adequately provide evidence of the role of a habitat ..., access to larva e, number of adjacent habitats, patch shape, area and fragmentation. The effects ... habitats are used as nurseries. Mangroves are used as preferred nursery habitat when coral density ... and biological characteristics of a rare marine habitat sub tidal seagrass beds of offshore islands ... more details
to residential areas in search of food due to lack of natural resources because of habitatfragmentation .... The goal behind habitat corridors shows the most hope for solving habitatfragmentation and restoring ...Mergefrom Wildlife corridor date December 2009 A habitat corridor is a strip of land that aids in the movement of species between disconnected areas of their Habitat ecology natural habitat . An animal s natural habitat would typically include a number of areas necessary to thrive, such as wetland s, burrowing ... to lose both their natural habitat and the ability to move between regions to use all of the resources they need to survive. Habitatfragmentation due to human development is an ever increasing threat to biodiversity , and habitat corridors are a possible solution. There are many things to look at before ... habitat corridors is to increase biodiversity . When areas of land are broken up by human interference ... new areas when food sources or other natural resources are lacking in their core habitat. wikt migration ..., and multiple other breeding adults Beier & Loe 1992 . When and where necessary A habitat corridor ... s can leave animals with no choice but to evacuate. If the habitat is not connected to a safer one, it will ultimately lead to death. A remaining portion of natural habitat is called a remnant ..., especially birds, from tree to tree, until they find a safe habitat to nest in. Not only do ... encourage the community to accept and support them. Types Habitat corridors can be categorized ... floors. Local some 50m connect remnant patches of gullies, wetlands, ridgelines, etc. Habitat corridors ... up, while stepping stone corridors are small patches of suitable habitat. When stepping ... a few large animal species but to protect biodiversity among all plants and animals, then habitat ... whether or not habitat corridors are increasing biodiversity. Stephen Mech and James Hallett introduce ... over time, which reveals the effects of fragmentation of several generations and is not as sensitive ... more details
One study shows that habitatfragmentation of tropical rainforests ... degradation, fragmentation, and pollution are aspects of habitat destruction caused by humans ... the highest in the world to give way to soybean cultivation. Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process ... Geology volume 38 pages 1079 1082 format PDF doi 10.1130 G31182.1 issue 12 ref Habitat destruction by human ... . Clearing habitats for agriculture is the principal cause of habitat destruction. Other important causes of habitat destruction include mining , logging , trawling and urban sprawl . Habitat ... & Raven, 2000, pp. 843 845 ref It is a process of natural environmental change that may be caused by habitatfragmentation , geological processes, climate change ref name SahneyBentonFerry2010LinksDiversityVertebrates ... depletion and other human activities mentioned below. The terms habitat loss and habitat reduction are also used in a wider sense, including loss of habitat from other factors, such as water pollution water and noise pollution . Impacts on organisms In the simplest terms, when a habitat is destroyed, the plants, animals, and other organisms that occupied the habitat have a reduced carrying ... Perhaps the greatest threat to organisms and biodiversity is the process of habitat loss. ref Barbault ... were significantly threatened by habitat loss. endemism Endemic organisms with limited ranges are most affected by habitat destruction, mainly because these organisms are not found anywhere else within .... Extinction may take place very long after the destruction of habitat, however, a phenomenon known as extinction debt . Habitat destruction can also decrease the range of certain organism ... http pulitzercenter.org reporting china sichuan panda deforestation habitat mountain conservation ... These hotspots are suffering from habitat loss and destruction. Most of the natural habitat on islands ... more details
Refimprove date April 2009 Habitat conservation is a land management practice that seeks to Conservation ethic conserve , protect and restore habitat areas for wild plant s and animal s, especially conservation reliant species , and prevent their extinction , habitatfragmentationfragmentation or reduction in Range biology range . ref name CDFG cite web url http www.dfg.ca.gov habcon title Habitat Conservation last Habitat Conservation Planning Branch publisher California Department of Fish & Game ... of any one ideology . Values of Natural Habitat See Environmental Economics The natural environment ... natural habitat. For instance, this was an issue in the northern rocky mountains of the USA ref cite journal last Prato first T title Evaluating Tradeoffs Between Economic Value and Wildlife Habitat ... economic value in conserving natural habitat. Financial profit can be made from tourist revenue, particularly ... ref . Measuring the worth of conserving different habitat areas is often criticized as being too utilitarian ... year 1998 volume 83 issue 3 pages 239 246 ref . Food Security Habitat conservation is important in maintaining ... and habitat conservation has been proposed to maintain plant diversity for food security purposes ... Habitat loss and destruction can occur both naturally and through anthropogenic causes.Events leading to natural habitat loss include climate change, catastrophic events such as volcanic explosions ... previously been the cause of many widespread and large scale losses in habitat. For example, some ... widespread losses in habitat as the Earth either received less sunlight or grew colder, causing ... to humans propensity to shape and modify their environment, the habitat of other species often become ... were left with no habitat and were driven into extinction. Once herbivorous megafauna species became ... hotspots are home to millions of habitat specialists, which do not exist beyond a tiny area ref ... year 2000 volume 403 pages 853 858 ref . Once their habitat is destroyed, they cease to exist.This ... more details
wiktionary habitatHabitat ecology , a place where a species lives and grows Category Human habitats Human habitat , a place where humans live, work or play Space habitat , a space station intended as a permanent settlement Underwater habitat , a fixed underwater structure in which people can live for extended periods and carry out most of the basic human functions of a 24 hour day, such as working, resting, eating, attending to personal hygiene, and sleeping. Habitat , a trade name for a positive pressure enclosure used to provide a safe environment for those doing hot work on offshore oil platforms. Habitat, a Canadian alt pop band made up of duo Diamond Rings musician John O Regan and Sylvie Smith Habitat retailer , a chain of furniture stores Habitat magazine Habitat magazine , an ongoing real estate magazine founded in 1982 Habitat video game Habitat video game , an online role playing game Habitat for Humanity International , a non profit organization devoted to building affordable housing Habitat 67 , a housing complex in Montreal, Quebec, Canada Habitat film Habitat film , a 1997 movie directed by Rene Daalder United Nations Human Settlements Programme UN HABITAT , the United Nations Human Settlements Programme , a United Nations agency disambiguation de Habitat Begriffskl rung fr Habitat gl H bitat pt Habitat desambigua o sk Habitat sl Habitat sv Habitat olika betydelser ... more details
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