THE EVOLUTION AND ECOLOGY OF CLOSELY RELATED SPECIES LIVING IN THE SAME AREA
EvolutionPublished 1 June 1961Open access
John L. Harper, J.N. Clatworthy, I. H. McNaughton, G. R. Sagar
Citations349
SJR quartileQ1
SJR score1.17
SNIP1.00
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
The diversity of both the flora and fauna of natural habitats has frequently been interpreted as the result of the intensity of a struggle for existence between nearly related forms, but there has been considerable controversy about the correct interpretation of field observations in this context.
Abstract
John L. Harper, J. N. Clatworthy, I. H. McNaughton, G. R. Sagar; THE EVOLUTION AND ECOLOGY OF CLOSELY RELATED SPECIES LIVING IN THE SAME AREA, Evolution, V
Keywords
Earth and Planetary SciencesAgricultural and Biological SciencesEnvironmental Science
Journal of Animal EcologyThe Relation Between the Number of Species and the Number of Individuals in a Random Sample of an Animal Population
3,509 Citations1943R. A. Fisher, A. Steven Corbet +1 more
It is shown that in a large collection of Lepidoptera captured in Malaya the frequency of the number of species represented by different numbers of individuals fitted somewhat closely to a hyperbola type of curve, so long as only the rarer species were considered.
Australian Journal of ZoologyAn outline of the dynamics of animal populations.
1,329 Citations1954AJ Nicholson
The characteristic of balance is sustained and effective compensatory reaction which maintains populations in being in spite of even violent changes in the environment, and which adjusts their densities in general conformity with prevailing conditions.
Advances in agronomyThe Physiological Basis of Variation in Yield
985 Citations1952D. J. WATSON
It is found that the yield of a field crop is the weight per unit area of the harvested produce or of some specific part of it, and it is more logical to base an analysis of yield on the weight changes that occur during growth than on changes in morphological characters.
Advances in geneticsThe Inviability, Weakness, and Sterility of Interspecific Hybrids
411 Citations1958G. Ledyard Stebbins
The study of the origin of species should not be a search for any more general causes, but a series of special and comparative investigations, by means of which the interrelationships mentioned above can be further explored and more firmly established.
Transactions of the Royal Entomological Society of LondonINSECTS AND CLIMATE.
334 Citations1931Boris Uvarov
Australian Journal of Agricultural ResearchCompetition between plants of different initial seed sizes in swards of subterranean clover ( <i>Trifolium subterraneum</i> L.) with particular reference to leaf area and the light microclimate
295 Citations1958J. N. Black
It is concluded that the disappearance of the small-seeded plants from the mixed swards was due to shading from the large-seeding plants.
Journal of Economic EntomologyThe Rôle of Biotic Factors in The Determination of Population Densities1,2
230 Citations1935H. S. Smith
Journal of Animal EcologyThe Natural Control of Population Balance in the Knapweed Gall-Fly (Urophora jaceana)
181 Citations1947G. C. Varley
The population density of the gall-flies and its bearing on their fecundity and the effect of weather on the behaviour of thegall-flies are studied.
Cold Spring Harbor Symposia on Quantitative BiologyThe Role of Weather in Determining the Distribution and Abundance of Animals
125 Citations1957L. C. Birch
Journal of EcologyStages in Invasion and Replacement Demonstrated by Species of Melandrium
117 Citations1948Herbert G. Baker
The following article is an attempt to provide both a theoretical analysis and evidence from nature of the occurrence of such interaction between two differentiated but interfertile populations.
Journal of Animal EcologyThe Generic Relations of Species in Small Ecological Communities
108 Citations1947C. B. Williams
The result indicates that there are fewer genera in a small or simple community than would be expected in a sample of the same number of species selected at random, independent of genera relationships--from the larger series.
New PhytologistTHE COMPARATIVE BIOLOGY OF CLOSELY RELATED SPECIES LIVING IN THE SAME AREA
103 Citations1960I. H. McNaughton, John L. Harper
It has been demonstrated that in Britain five species of Papaver frequently occur together, flower over the same general period, and are normally insect-pollinated and possess insect visitors in common.
Journal of EcologySome Applications of the Logarithmic Series and the Index of Diversity to Ecological Problems
89 Citations1944C. B. Williams
The logarithmic series is found to fit extremely well to a large number of frequency series drawn from insects, birds, butterflies and plants, except that there is a slight tendency for the calculated n1 to be below the observed.
Cold Spring Harbor Symposia on Quantitative BiologySelf-Regulation of Numbers through Changers in Viability
89 Citations1957Dennis Chitty
Weed ResearchEXPERIMENTAL STUDIES OF THE MORTALITY AND PLASTICITY OF A WEED
89 Citations1961John L. Harper, Danica Gajić
An attempt is made to show the ways in which a population of annual plants may react to increasing density so that the population becomes self-regulatory and it is shown that interference between Agrostemma and other species may influence either or both reactions.
EvolutionPRINCIPLES OF NATURAL COEXISTENCE INDICATED BY LEAFHOPPER POPULATIONS
75 Citations1957Herbert H. Ross
Drawing significant conclusions indicating that certain of the concepts of species ranges and ecological occupancy have been unnatural are found.
Journal of Experimental BotanyThe Comparative Biology of Closely Related Species Living in the Same Area
69 Citations1962J.N. Clatworthy, John L. Harper
The variation in the two components was most closely correlated (negatively) when the struggle for existence was most evenly balanced, and the mean frond weight of the losing com ponent declined during the experiments.
Journal of Experimental BotanyAn Analysis of the Influence of Plant Density on the Growth of<i>Vicia faba</i>
64 Citations1956G. L. Hodgson, G. E. BLACKMAN
The competitive effects of varying the density on the development of Vicia faba have been studied in a series of multifactorial experiments where the spacing both between and within rows was simultaneously altered.
Journal of Experimental BotanyAn Analysis of the Influence of Plant Density on the Growth of<i>Vicia faba</i>
59 Citations1957G. L. Hodgson, G. E. BLACKMAN
Cold Spring Harbor Symposia on Quantitative BiologyThe Use of Conceptual Models in Population Ecology
58 Citations1957H. G. Andrewartha
EvolutionGEOGRAPHY, ECOLOGY AND COEXISTENCE IN RELATION TO THE BIOLOGICAL DEFINITION OF THE SPECIES
55 Citations1953A. J. Cain
These definitions raise two important questions: what is the meaning of 'geographical' and 'ecological'; and in what sense can some populations replace each other geographically and others ecologically?
Annual Review of EntomologySome Recent Contributions to the Study of the Distribution and Abundance of Insects
48 Citations1960H. G. Andrewartha, L. C. Birch
New PhytologistNATURAL HYBRIDIZATION OF <i>AGROSTIS TENUIS</i> SIBTH. AND <i>A. STOLONIFERA</i> L.
45 Citations1958A. D. Bradshaw
There seems to be little barrier to natural hybridization between Agrostis tennis Sibth.
Journal of EcologyThe Comparative Biology of Closely Related Species Living in the Same Area: IV. Rumex: Interference Between Individuals in Populations of One and Two Species
44 Citations1959John L. Harper, A. P. Chancellor
The experiments described in this paper were designed to determine the differences in response of systematically closely related species when subjected to experimentally controlled variations in the physical and biotic environment.
Annals of BotanyPhysiological and Ecological Studies in the Analysis of Plant Environment: 1. The Light Factor and the Distribution of the Bluebell (Scilla non-scripta) in Woodland Communities1
39 Citations1946G. E. BLACKMAN, Allison Rutter
Outlook on AgricultureEcological Aspects of Weed Control
34 Citations1957John L. Harper
It is unlikely that the use of herbicides will lead to major weed problems from previously minor, but herbicide-resistant, weeds, but Susceptible species may develop resistant strains, and action must be taken to meet this danger.
Annals of Applied BiologyTHE INFLUENCE OF THE ENVIRONMENT ON SEED AND SEEDLING MORTALITY
15 Citations1955John L. Harper
Journal of Animal EcologyA Note on the Papers of Elton and Williams on the Generic Relations of Species in Small Ecological Communities
12 Citations1951T. B. Bagenal
It was found necessary to attempt a reconciliation between these two conflicting views, and the present note is the result of a consideration of the thirteen communities used by both Elton and Williams from the point of view of their suitability for the type of analysis to which they have been subjected.
EvolutionTHE CONCEPT OF ECOLOGIC NICHE, WITH REFERENCE TO THE THEORY OF NATURAL COEXISTENCE
9 Citations1958Jay M. Savage
An interesting discussion of the natural coexistence of closely related species of leafhoppers in the same ecologic situation is marred by a fundamental confusion in the usage of the term ecologic niche which makes fallacious almost all of his conclusions.
NatureAn Apparently Simple Case of Population Control
3 Citations1958Mark Williamson
A system to keep the population of the common snail Helix aspersa at a constant size in the same way that an overflow pipe keeps water in a tank at constant depth is proposed.