نتایج جستجو برای: ecological adaptation

تعداد نتایج: 241638  

Journal: :به نژادی نهال و بذر 0
شکیبا شاهمرادی1 s. shahmoradi محمدرضا چائی چی m. r. chaeichi جواد مظفری j. mozafari seed and plant improvement institute, karaj, iranموسسه تحقیقات اصلاح و تهیه نهال و بذر، کرج داریوش مظاهری d. mazaheri فرزاد شریف زاده f. sharifzadeh

seed dormancy has a critical role in ecological adaptation of wild plant species such as hordeum spontaneum, a wild relative of barley. in this study, 192 ecotypes of hordeum spontaneum maintained in national plant gene bank of iran (npgbi) originating from different climatic zones of the country were evaluated. morphological, phenological and physiological traits were recorded in the field. af...

2014
Julia Baird Ryan Plummer Kerrie Pickering

Climate change adaptation presents a challenge to current top-down governance structures, including the tension between provision of public goods and actions required by diverse stakeholders, including private actors. Alternative governance approaches that facilitate participation and learning across scales are gaining attention for their ability to bring together diverse actors across sectors ...

2013
Paola Fortis Roberta Ronchi Elena Calzolari Marcello Gallucci Giuseppe Vallar

Prism adaptation improves a wide range of manifestations of left spatial neglect in right-brain-damaged patients. The typical paradigm consists in repeated pointing movements to visual targets, while patients wear prism goggles that displace the visual scene rightwards. Recently, we demonstrated the efficacy of a novel adaptation procedure, involving a variety of every-day visuo-motor activitie...

Journal: :Molecular ecology 2012
I Keller O Seehausen

Ecological speciation is defined as the emergence of reproductive isolation as a direct or indirect consequence of divergent ecological adaptation. Several empirical examples of ecological speciation have been reported in the literature which very often involve adaptation to biotic resources. In this review, we investigate whether adaptation to different thermal habitats could also promote spec...

Journal: :Helgoländer Wissenschaftliche Meeresuntersuchungen 1973

Journal: :The American naturalist 2016
Adam M Siepielski Alex Nemirov Matthew Cattivera Avery Nickerson

Determining how adaptive evolution can be coupled to ecological processes is key for developing a more integrative understanding of the demographic factors that regulate populations. Intraspecific competition is an especially important ecological process because it generates negative density dependence in demographic rates. Although ecological factors are most often investigated to determine th...

Journal: :Science 2009
G Sander van Doorn Pim Edelaar Franz J Weissing

Ecological speciation is considered an adaptive response to selection for local adaptation. However, besides suitable ecological conditions, the process requires assortative mating to protect the nascent species from homogenization by gene flow. By means of a simple model, we demonstrate that disruptive ecological selection favors the evolution of sexual preferences for ornaments that signal lo...

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