On r- and k-selection. american naturalist

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Web1 de mar. de 1981 · In the present study, the r-selected decapods were represented by the Penaeoidea group (Dendrobranchiata). The K-selected ones were represented by the Pleocyemata, i.e., Caridea, Brachyura ... WebAmerican Naturalist 100, 603-609, 1966. 5576: 1966: On r and K selection (Citation Classic) ER Pianka. American Naturalist 104, 592-597., 1970. 5091: 1970: Evolutionary …

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WebNumerous organisms inhabiting variable environments exhibit temporally dynamic reproductive strategies. Populations of such organisms demonstrate considerable variation in reproductive effort associated with environmental changes and thus shift between relative r- and K-positions on the r-K continuum. Failure to consider such dynamic strategies can … WebAlexander Milles, Melanie Dammhahn, Florian Jeltsch, Ulrike Schlägel, and Volker Grimm Fluctuations in Density-Dependent Selection Drive the Evolution of a Pace-of-Life … fluorescein isothiocyanate–dextran protocol

A Quantitative Genetic Model of r- and K-Selection in a …

WebThe status of the concept of r- and K-selection is discussed and a more restricted usage of the terms is recommended. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 207,820,138 papers from all fields of science. Search ... The American Naturalist. 1972; Webr/K selection theory describes the way a species controls its number of offspring. r-selection species produce many offspring. K-selected species focus on a few. Neither method is in itself superior, and they may occur in the same habitat; e.g., rodents (r-selection) and elephants (K-selection). The theory was popular in the 1970s and 1980s ... WebLong-Term Organic–Inorganic Fertilization Regimes Alter Bacterial and Fungal Communities and Rice Yields in Paddy Soil. Microorganisms are the most abundant and … greenfield high school ma

Reconsideration of r/K Selection Theory Using Stochastic …

Web26 de jul. de 1991 · Abstract. Theories of density-dependent natural selection state that at extreme population densities evolution produces alternative life histories due to trade-offs. The trade-offs are presumed to arise because those genotypes with highest fitness at high population densities will not also have high fitness at low density and vice-versa. WebAlexander Milles, Melanie Dammhahn, Florian Jeltsch, Ulrike Schlägel, and Volker Grimm Fluctuations in Density-Dependent Selection Drive the Evolution of a Pace-of-Life … greenfield high school logoWebPianka, E.R. (1970) On r and k selection. American Naturalist, 104, 592-597. doi:10.1086/282697 has been cited by the following article: TITLE: Effects of life-history … fluorescein-poly gt

"Web21 de jun. de 2024 · A K- reproductive strategy is a set of life history traits that would be selected for when a population reaches highest density. The terminology is taken from a parameter in population growth models, where carrying capacity ( K) is the maximum population size that can be supported by an environment. The opposite strategy is an r … " - On r- and k-selection. american naturalist

On r- and k-selection. american naturalist

r and K Selection or b and d Selection? Semantic Scholar

WebIt is argued that rand K-selection may have important ramifications for the understanding of life history evolution, but for the model to be useful, it must be interpreted strictly as it … Webr- and K-theory can be used to compare the life strategies of plant pathogens, at least during the parasitic phase. While, as a group, plant pathogens tend to be r-selected, individual …

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WebBrownfield sites are thought to support a minimum of 12–15% of Britain's nationally scarce and rare invertebrates. The amount of derelict land in Britain is set to decrease dramatically under current home-building and regeneration policies. There is therefore a pressing need for research into the potential importance of brownfield sites for invertebrates. In this … Web14 de abr. de 2024 · While the samples taken from above the K-Ah tephra on Tanegashima are undated , the samples from southern Kyushu suggest that this impoverished vegetation dominated throughout the Todoroki B1-3 pottery period (c. 7100–6600 cal BP), indicating that the impact on vegetation persisted for a period of at least seven centuries following …

WebK-selection synonyms, K-selection pronunciation, K-selection translation, English dictionary definition of K-selection. or K-se·lec·tion n. A form of selection that occurs in an environment at or near carrying capacity, favoring a reproductive strategy in … WebIn ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. The focus on either an …

Web26 de ago. de 2024 · American Naturalist, 107, 651 ... A most interesting theoretical notion pertinent to this problem is r- and K-selection (MacArthur 1962; Cody 1966; MacArthur and Wilson 1967; ... Web阅读量：. 260. 作者：. Pianka ， Eric R. 摘要：. In r-type natural selection, mortality is relatively independent of genotype and population size due to the variable or unpredictable nature of the environment. In K-type selection, which occurs in fairly constant or predictable environments, individuals are favoured which have the ...

WebPianka, E. R. (1970). On r- and K-Selection. The American Naturalist, 104(940), 592–597. doi:10.1086/282697

Web11 de abr. de 2024 · 1 Introduction. As a fundamental concept for dynamic component of the climate system, resilience is typically defined as the ability of individual trees, forests or ecosystems to resist sudden disturbances and recover to their initial state (Holling, 1973; Simoniello et al., 2008).Given the large potential of vegetation to take up atmospheric … fluorescein polymer reviewWebהפלודיפלואידיות (ב אנגלית: Haplodiploidy) היא מערכת פלואידית בה זכרים מתפתחים מביצים לא מופרות והם הפלואידים (חד־סדרתיים – בעלי עותק אחד מכל כרומוזום), והנקבות מתפתחות מביצים מופרות והן ... greenfield high school mapWebVol. 106, No. 951 The American Naturalist September-October 1972 y AND K SELECTION OR b AND d SELECTION"? ERIC R. PIANKA Department of Zoology, University of Texas, Austin, Texas 78712 Hairston, Tinkle, and Wilbur (1970) recently criticized the concepts of r and K selection as proposed by MacArthur and Wilson … fluorescein light eyeWebIn ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. The focus on either an increased quantity of offspring at the expense of individual parental investment of r-strategists, or on a reduced quantity of offspring with a corresponding increased parental … fluorescein lightWeb22 de mar. de 2024 · Assessments of goodness-of-fit using the DHARMa package in R indicated that models including a random effect of site poorly fit the underlying data (Hartig and Lohse 2024; Table 2). To address how variable terrestrial distributions might be among sites, we modeled gopher frog distributions at 5 sites with a large enough sample of … greenfield high school greenfield caWeb23 de jun. de 2016 · Pianka ER. On r-and K-selection. American naturalist. 1970;p. 592–597. View Article Google Scholar 4. Reznick D, Bryant MJ, Bashey F. r-and K … fluorescein refractive indexWebThe concepts of r and K selection and b and d selection are discussed and compared. The former pair of concepts will play a central role in the development of new theories in … greenfield high school schedule