Results 211 to 220 of about 15,054 (266)
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Malaria Ecotypes and Stratification
2012To deal with the variability of malaria, control programmes need to stratify their malaria problem into a number of smaller units. Such stratification may be based on the epidemiology of malaria or on its determinants such as ecology. An ecotype classification was developed by the World Health Organization (WHO) around 1990, and it is time to assess ...
Schapira, A., Boutsika, K.
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Ecotype, ecospecies, and macroevolution
Experientia, 1948The combined efforts of taxonomists and geneticists have succeeded to a considerable extent in solving that part of the problem of evolution which concerns the subspecific level. The detailed work of innumerable taxonomists following in the footsteps of Kleinschmidt K.
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Weed Science, 1971
Seed of common ragweed (Ambrosia artemisiifoliaL.) ecotypes were collected from 12 locations in North America and were planted at Ithaca, New York. Plants from seed collected in the northern latitudes flowered earlier and produced less vegetative growth.
C. T. Dickerson, R. D. Sweet
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Seed of common ragweed (Ambrosia artemisiifoliaL.) ecotypes were collected from 12 locations in North America and were planted at Ithaca, New York. Plants from seed collected in the northern latitudes flowered earlier and produced less vegetative growth.
C. T. Dickerson, R. D. Sweet
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Nature, 1926
IN Hereditas, Bd. vi. (1925), which has just come to hand, there is an extremely interesting paper by Gote Turesson on “Plant Species in Relation to Habitat and Climate.” This author has grown in Sweden upwards of 10,000 cultures of various types and races of certain widely distributed plants, in order to ascertain the precise nature of the forms ...
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IN Hereditas, Bd. vi. (1925), which has just come to hand, there is an extremely interesting paper by Gote Turesson on “Plant Species in Relation to Habitat and Climate.” This author has grown in Sweden upwards of 10,000 cultures of various types and races of certain widely distributed plants, in order to ascertain the precise nature of the forms ...
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Science China Earth Sciences, 2020
Prochlorococcus, a group of marine cyanobacteria, is the most abundant and smallest oxygen-producing photosynthetic microorganism. It is mainly distributed in the euphotic zone of tropical and subtropical oceans and is a key participant in the marine biogeochemical cycle.
Wei Yan +4 more
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Prochlorococcus, a group of marine cyanobacteria, is the most abundant and smallest oxygen-producing photosynthetic microorganism. It is mainly distributed in the euphotic zone of tropical and subtropical oceans and is a key participant in the marine biogeochemical cycle.
Wei Yan +4 more
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Ecotypic responses of switchgrass to altered precipitation
Functional Plant Biology, 2012Anthropogenic climate change is projected to alter precipitation patterns, resulting in novel environments for plants. The responses of dominant plant species (e.g. Panicum virgatum L. (switchgrass)) to climate changes can drive broader ecosystem processes such as primary productivity. Using a rainfall mesocosm facility, three ecotypes of P.
Jeffrey C, Hartman +2 more
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CHARACTERISATION OF OLIVE WILD ECOTYPES
Acta Horticulturae, 1999Because of the ecosystem characteristics, wild olive varieties (Olea europnea L. var. oleaster Hoff, et Lk.) are widely spread in Sardinia as a typical component of the Mediterranean maquis. In order to obtain more information on the possibility to use wild olives in breeding programs for olive growing a preliminary study was carried out on the genetic
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Ecotype diversification of an abundant Roseobacter lineage
Environmental Microbiology, 2017Summary The Roseobacter DC5‐80‐3 cluster (also known as the RCA clade) is among the most abundant bacterial lineages in temperate and polar oceans. Previous studies revealed two phylotypes within this cluster that are distinctly distributed in the Antarctic and other ocean provinces.
Ying, Sun +3 more
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Ecotypes and Community Function
The American Naturalist, 1960The result of natural selection is commonly a pattern of ecotypic variation within a species. This has proven to be of rather general occurrence among trees, shrubs, grasses, and herbs, annual and perennial. Among animal species, the demonstration is less general, but includes examples among insects, fishes, amphibians, and rodents.
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Temperature Ecotypes in Seaweeds: Adaptive Significance and Biogeographic Implications
Botanica Marina, 1994We examined the existence of temperature ecotypes in seaweed species from the North Atlantic Ocean belonging to different biogeographic groups. Temperature ranges for survival, growth and reproduction were determined in culture for a total of 68 isolates belonging to 18 species.
Breeman, A. M., Pakker, H.
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