On r- and k-selection. american naturalist

Author: tlct

August undefined, 2024

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 …

K-Reproductive Strategy SpringerLink

WebA comparison of environmental and population parameters between sites differing in length of frost-free period indicated that populations from short growing season locations should … 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 ... imagine me book free

(PDF) The meaning of r- an K-selection - ResearchGate

Web12 de abr. de 2024 · Interactions between stress-tolerant and stress-intolerant species (nurse–protégé interactions) bear the potential to diversify green roof functionality, yet are not well understood. We provide a fra... Web22 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 … WebAlexander Milles, Melanie Dammhahn, Florian Jeltsch, Ulrike Schlägel, and Volker Grimm Fluctuations in Density-Dependent Selection Drive the Evolution of a Pace-of-Life … list of film jobs

K-selection - definition of K-selection by The Free Dictionary

Carabid beetle assemblages on urban derelict sites in Birmingham, …

WebPianka, E. R. (1970). On r- and K-Selection. The American Naturalist, 104(940), 592–597. doi:10.1086/282697 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. list of filmrise channelsWebPianka, E. R. (1970) “On r-and K-selection”, The American Naturalist, 104, pp. 592-597 [accessed on 20 February 2013]. ... The reason for this terminology of K-selection and r-selection is that in the common equations used to … list of film production companies in kenya

"WebPublished 1 September 1972. Psychology. The American Naturalist. The concepts of r and K selection and b and d selection are discussed and compared. The former pair of … " - On r- and k-selection. american naturalist

On r- and k-selection. american naturalist

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 ... 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 …

Did you know?

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 … Webr/K選擇理論（r/K selection theory）是二十世紀生態學上一個有關生物體如何權衡後代的數量與品質的理論，這個理論需要將性狀和自然選擇結合在一起進行考慮。這兩個概念是相對比較出來的，在討論生物生存策略時，會針對物種進行對比。其中r理論是指以犧牲父母投資為代價從而增加子代的數量 ...

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 … Web2 de fev. de 2024 · To account for phylogenetic uncertainty in our results, we applied all the analyses of this paper to the tree from Porto et al. (2024) and on two other phylogenies from Nyakatura and Bininda-Emonds (2012) and from Perri et al. (2024).. Time calibration on the tree from Porto et al. (2024) was performed using the “chronopl” function in the ape …

WebLong-Term Organic–Inorganic Fertilization Regimes Alter Bacterial and Fungal Communities and Rice Yields in Paddy Soil. Microorganisms are the most abundant and … Web11 de abr. de 2024 · During the “decade on restoration,” we must understand how to reliably re-establish native plant populations. When establishing populations through seed addition, practitioners often prioritize obtaining seed from locations geographically near the restoration site (i.e. “local seed sourcing”).

WebABSTRACT: The present study explores the links among life history, reproductive strategy, autism-spectrum quotient, and quality of life. Our 235 participants (167 women and 68 …

Web13 de abr. de 2024 · Consumptive effects (CEs) of predation have been well-studied in most aquatic systems, but nonconsumptive effects (NCEs) on prey have only recently received limited attention. As aquatic consumers, t... list of filmmakersWebTitle: On r- and K-Selection Created Date: 20240227221114Z imagine medispa beckley wvWebהפלודיפלואידיות (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 ... list of film periodicals wikipediaWebVol. 109, No. 967 The American Naturalist May-June 1975 r- AND K-SELECTION IN T YPHA S. J. McNAUGHTON Biological Research Laboratories, 130 College Place, Syracuse, ... Wilson's (1967) theory of r- and K-selection, although similar arguments were developed earlier in different contexts (Fisher 1930; Dobzhansky 1950). As imagine me being free trusting you songWeb1 de jun. de 2002 · PDF The theory of r- and K-selection was one of the first predictive models for life-history evolution. ... American Naturalist 114:569–583. Boyce, M. S. 1984. Restitution of. r - and. K imagine me by tahereh mafiWebIt 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 was originally formulated: as a model of density-dependent natural selection. Dawkins (36, p. 293) observes that "ecologists enjoy a curious love/hate relationship with the r/K … list of film production companies in the ukWebOn r- and K-selection. American Naturalist, 104, 592–597. Popper, K. R. (1959). The Logic of Scientific Discovery. London: Hutchinson. ... On the relationship between r/K selection and environmental carry capacity: a new habitat templet for plant life history strategies. Oikos, 58, 239–250. list of film producers