نتایج جستجو برای: phenological charactristics

تعداد نتایج: 4074  

2017
Debora Arlt Tomas Pärt

Warmer springs may cause animals to become mistimed if advances of spring timing, including available resources and of timing of breeding occur at different speed. We used thermal sums (cumulative sum of degree days) during spring to describe the thermal progression (timing) of spring and investigate its relationship to breeding phenology and demography of a long-distant migrant bird, the north...

2011
Susanne C. Jochner Isabelle Beck Heidrun Behrendt Claudia Traidl-Hoffmann Annette Menzel

Extreme temperatures have a notable effect on phenology, much greater than expected from the general rule that low temperatures lead to a later — and high temperatures to an earlier — onset of phenological phases. The latter phenomenon can be seen when comparing urban areas with their rural surroundings: plants flower earlier in cities due to the urban heat island effect that contributes to hig...

2017
Lijuan Miao Daniel Müller Xuefeng Cui Meihong Ma

Climate change affects the timing of phenological events, such as the start, end, and length of the growing season of vegetation. A better understanding of how the phenology responded to climatic determinants is important in order to better anticipate future climate-ecosystem interactions. We examined the changes of three phenological events for the Mongolian Plateau and their climatic determin...

2009
Louie H. Yang V. H. W. Rudolf

Louie H. Yang and V. H. W. Rudolf* Department of Entomology, UC Davis, CA 95616, USA Department of Ecology & Evolutionary Biology, Rice University, Houston, TX 77098, USA *Correspondence: E-mail: [email protected] These authors contributed equally to this work. Abstract Climate change is altering the phenology of many species and the timing of their interactions with other species, but the...

Journal: :Annals of agricultural and environmental medicine : AAEM 2009
Maria Fernandez-Gonzalez Javier Rodriguez-Rajo Victoria Jato Jesus Aira

Knowledge about the fungal spores most abundant in the atmosphere of a vineyard is of great use since it allows development of prediction models of the spore concentration, and therefore application of phytosanitary treatments only when high levels of fungal propaguls are detected. In this study the concentration of phytopathogenic spores is related with the different phenological stages of the...

Journal: :Revista de biologia tropical 2012
W Alice Boyle Judith L Bronstein

Reproductive phenologies of plants are constrained by climate in highly seasonal regions. In contrast, plants growing in wet tropical forests are freed from many abiotic constraints, which in canopy tree communities lead to a rich diversity of phenological patterns within and among individuals, species and communities. However, basic descriptions of tropical phenological patterns and the proces...

Journal: :Remote Sensing 2014
Qian Wang Lifu Zhang Taixia Wu Yi Cen Changping Huang Qingxi Tong

Phenological shifts in events such as flowering and bud break are important indicators of ecosystem processes, and are therefore of particular significance for carbon (C) cycle research. Using long-term flux data from three contrasting plant functional type (evergreen and deciduous) boreal forest sites, we evaluated and compared the responses of annual C fluxes to multiple spring phenological i...

Journal: :International journal of biometeorology 2014
Lynda E Chambers Peter Dann Belinda Cannell Eric J Woehler

Seabirds are one of the most threatened groups of birds globally and, overall, their conservation status is deteriorating rapidly. Southern hemisphere countries are over-represented in the number of species of conservation concern yet long-term phenological data on seabirds in the southern hemisphere is limited. A better understanding of the implications of changes in the marine and terrestrial...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2010
Inés Ibáñez Richard B Primack Abraham J Miller-Rushing Elizabeth Ellwood Hiroyoshi Higuchi Sang Don Lee Hiromi Kobori John A Silander

As a consequence of warming temperatures around the world, spring and autumn phenologies have been shifting, with corresponding changes in the length of the growing season. Our understanding of the spatial and interspecific variation of these changes, however, is limited. Not all species are responding similarly, and there is significant spatial variation in responses even within species. This ...

Journal: :Proceedings. Biological sciences 2015
Nadiah Pardede Kristensen Jacob Johansson Jörgen Ripa Niclas Jonzén

In migratory birds, arrival date and hatching date are two key phenological markers that have responded to global warming. A body of knowledge exists relating these traits to evolutionary pressures. In this study, we formalize this knowledge into general mathematical assumptions, and use them in an ecoevolutionary model. In contrast to previous models, this study novelty accounts for both trait...

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