FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2528834180> ?p ?o ?g. }

• W2528834180 abstract "In this thesis a variety of approaches are examined and used toexplore the dynamics, patterns and structure of ecological communities.I address the problem of it is possible for a number of species tocoexist ... all competing for the same sorts of materials (Hutchinson1961). An ensemble model is used in an attempt to capture those factorsthat make for long-term community coexistence. The model is also used asa vehicle to explore - as well as to generate questions and hypothesesrelating to - topics currently being examined by community ecologists.For example, the persistence and stability of ecological communities, orthe true (sometimes hidden) nature of the interaction between a pair ofspecies can be analysed with the aid of the model. I also study theproblem of how, by directly analysing field-data, one might detectevidence of any community-wide processes that explain coexistence.The model makes use of the Generalized Lotka-Volterra equations,and is primarily based on the fundamental consumer-resource interaction,so that in the main, competition communities are investigated. Thedesign of the model permits an analytical study of multi-species systems(say 5 to 100 species). This contrasts with analyses of models normallypresented in the literature which usually describe communities of onlytwo or three interacting species. One feature of the ensemble model isthat it makes allowance for environmental variations (which causestructural and/or population disturbances) by simulating the totality ofpossible states to which an ecosystem can be disturbed. It was foundthat feasibility - the requirement that all equilibrium populations of asystem are positive - is a key factor. In fact, virtually all of themodel's feasible states were stable. Feasibility was thus found to be amore critical factor than stability - even though it is the latterproperty which is normally concentrated on, in studies of model-ecosystems.The model presents an interpretation of communities that spendmost of their lifetime close to an equilibrium. This limited view wasthen naturally extended, and it became possible to analyse communitiesthat experience a relatively high disturbance rate, and therefore spendonly a minor part of their lifetime close to any equilibrium. It isshown that persistent communities can possess the important qualities ofconservation and recovery, without necessarily appearing to possess astable equilibrium.The model demonstrates that environmental variability may promotecoexistence. An examination is made of how community coexistence dependson species' relative competitive abilities and upon their abilities tospread risks. As well, the response of a community to speciesinvasions is analysed, and a species extinction curve is derived thatcorresponds qualitatively to that obtained from field-data on theHawaiian avifauna.The notion of a competition community is then discussed. Althougha pair of species might appear to be competing when viewed in isolation,their interaction could well be facilitative if viewed within acommunity context. This phenomenon appears to be prevalent 1n nearly allof the observed competition communities I examined, and can beattributed to hidden indirect effects between species. The ensemblemodel provides an explanation as to why these facilitations occur sofrequently.A detailed null test is performed in order to deduce whether birddistributions on some archipelagos are nothing more than randomassemblages, as has been argued by Connor and Simberloff (1979). Thedesign of the null test 1s unique and makes use of a speciallyformulated C-score statistic to determine the checkerboard patternswithin biogeographic data. The test adheres faithfully to theconstraints outlined by Connor and Simberloff, whereas other attemptsreported in the literature have failed to do so. The data is shown tohave signicantly large checkerboard distributions when compared to anull model. Even so, analysis of the New Hebrides bird data (whenexamined at the family level) indicates that it is the coexistenceprinciple which shapes community organization, rather than thecompetitive exclusion principle." @default.
• W2528834180 created "2016-10-14" @default.
• W2528834180 creator A5066430018 @default.
• W2528834180 date "2017-01-05" @default.
• W2528834180 modified "2023-10-06" @default.
• W2528834180 title "Some problems of community ecology: processes, patterns and species persistence in ecosystems" @default.
• W2528834180 cites W13559253 @default.
• W2528834180 cites W1485221313 @default.
• W2528834180 cites W1500291103 @default.
• W2528834180 cites W1500921805 @default.
• W2528834180 cites W1512279977 @default.
• W2528834180 cites W154646596 @default.
• W2528834180 cites W1584053331 @default.
• W2528834180 cites W1964162868 @default.
• W2528834180 cites W1965315290 @default.
• W2528834180 cites W1967821679 @default.
• W2528834180 cites W1968945887 @default.
• W2528834180 cites W1969701435 @default.
• W2528834180 cites W1969795410 @default.
• W2528834180 cites W1969903065 @default.
• W2528834180 cites W1970641401 @default.
• W2528834180 cites W1972783544 @default.
• W2528834180 cites W1973475592 @default.
• W2528834180 cites W1974468625 @default.
• W2528834180 cites W1974839613 @default.
• W2528834180 cites W1975003732 @default.
• W2528834180 cites W1977346794 @default.
• W2528834180 cites W1978137995 @default.
• W2528834180 cites W1978192624 @default.
• W2528834180 cites W1985342263 @default.
• W2528834180 cites W1991992709 @default.
• W2528834180 cites W1994507967 @default.
• W2528834180 cites W1995304050 @default.
• W2528834180 cites W1996223682 @default.
• W2528834180 cites W1997125947 @default.
• W2528834180 cites W1998123203 @default.
• W2528834180 cites W1998245410 @default.
• W2528834180 cites W1999731809 @default.
• W2528834180 cites W2000256297 @default.
• W2528834180 cites W2001414066 @default.
• W2528834180 cites W2002447523 @default.
• W2528834180 cites W2003434043 @default.
• W2528834180 cites W2005386280 @default.
• W2528834180 cites W2005841047 @default.
• W2528834180 cites W2006265485 @default.
• W2528834180 cites W2008536883 @default.
• W2528834180 cites W2008771244 @default.
• W2528834180 cites W2009033023 @default.
• W2528834180 cites W2009590738 @default.
• W2528834180 cites W2010032360 @default.
• W2528834180 cites W2010981035 @default.
• W2528834180 cites W2011303397 @default.
• W2528834180 cites W2011872755 @default.
• W2528834180 cites W2012588930 @default.
• W2528834180 cites W2012627164 @default.
• W2528834180 cites W2013945534 @default.
• W2528834180 cites W2016511349 @default.
• W2528834180 cites W2017229876 @default.
• W2528834180 cites W2018165319 @default.
• W2528834180 cites W2019012549 @default.
• W2528834180 cites W2020073162 @default.
• W2528834180 cites W2020750554 @default.
• W2528834180 cites W2021903957 @default.
• W2528834180 cites W2022437883 @default.
• W2528834180 cites W2023678532 @default.
• W2528834180 cites W2026379673 @default.
• W2528834180 cites W2026446135 @default.
• W2528834180 cites W2026572668 @default.
• W2528834180 cites W2027577999 @default.
• W2528834180 cites W2029278818 @default.
• W2528834180 cites W2031447276 @default.
• W2528834180 cites W2033980098 @default.
• W2528834180 cites W2034690972 @default.
• W2528834180 cites W2037045705 @default.
• W2528834180 cites W2039712807 @default.
• W2528834180 cites W2039810102 @default.
• W2528834180 cites W2040629967 @default.
• W2528834180 cites W2042180107 @default.
• W2528834180 cites W2043219109 @default.
• W2528834180 cites W2043802897 @default.
• W2528834180 cites W2043806900 @default.
• W2528834180 cites W2043905980 @default.
• W2528834180 cites W2043958754 @default.
• W2528834180 cites W2044065944 @default.
• W2528834180 cites W2045166891 @default.
• W2528834180 cites W2045234840 @default.
• W2528834180 cites W2048706043 @default.
• W2528834180 cites W2049546703 @default.
• W2528834180 cites W2049685019 @default.
• W2528834180 cites W2053679599 @default.
• W2528834180 cites W2053815405 @default.
• W2528834180 cites W2054637019 @default.
• W2528834180 cites W2055541152 @default.
• W2528834180 cites W2056842054 @default.
• W2528834180 cites W2058864250 @default.
• W2528834180 cites W2059753717 @default.
• W2528834180 cites W2060793884 @default.
• W2528834180 cites W2060852353 @default.
• W2528834180 cites W2061011338 @default.
• W2528834180 cites W2061731692 @default.

• next