نتایج جستجو برای: models of phenology

تعداد نتایج: 21225267  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Heidi Steltzer Chris Landry Thomas H Painter Justin Anderson Edward Ayres

Dust deposition to mountain snow cover, which has increased since the late 19(th) century, accelerates the rate of snowmelt by increasing the solar radiation absorbed by the snowpack. Snowmelt occurs earlier, but is decoupled from seasonal warming. Climate warming advances the timing of snowmelt and early season phenological events (e.g., the onset of greening and flowering); however, earlier s...

2017
Diane L. Byers

Plant-pollinator interactions are potentially at risk due to climate change. Because of the spatial and temporal variation associated with the effects of climate change and the responses of both actors, research to assess this interaction requires creative approaches. This review focuses on assessments of plants' and pollinators' altered phenology in response to environmental changes, as phenol...

2013
Caroline A. Polgar Richard B. Primack

Monitoring phenology, the study of the timing of natural events, is an ancient practice that has experienced renewed interest in the wake of awareness of climate change. Spring onset has been occurring significantly earlier in temperate regions worldwide. Leaf out phenology is of particular interest because the emergence of leaves in the spring is extremely sensitive to temperature, and leaf ou...

2014
Kaesha Neil Jianguo Wu Christofer Bang Stanley Faeth

Introduction: Climate change and urbanization have been shown to alter plant phenology. However, a mechanistic understanding of these changes in flowering phenology and associated pollinator communities is lacking. Thus, this study was designed to examine finer scale flowering phenological patterns and driving processes in an arid urban ecosystem. Specifically, we tested the effect of water ava...

2015
Di Xu Meichen Fu Marc A. Rosen

Vegetation plays an important role in atmospheric, hydrologic and biochemical cycles and is an important indicator of the impact of climate and human factors on the environment. In this paper, a method, which combines the empirical orthogonal function (EOF) and temporal unmixing analysis (TUA) methods, is applied to monitor the phenological characteristcs and spatial distribution of vegetation ...

Journal: :The New phytologist 2008
Richard S Dodd Daniel Hüberli Wasima Mayer Tamar Y Harnik Zara Afzal-Rafli Matteo Garbelotto

Variations in synchronicity between colonization rate by the pathogen and host phenology may account for unexplained spatial distribution of canker disease. The hypothesis that synchronous pathogenicity and host development are necessary for incidence of sudden oak death disease was tested by correlating seasonal variations in host cambial phenology and response to inoculation with Phytophthora...

2008
Joseph J. O’Brien Steven F. Oberbauer David B. Clark Deborah A. Clark

The relationship between phenology and tree stem diameter increment is largely unexplored in tropical species, especially in wet tropical forests. To explore links between these phenomena, we measured stem diameter increment and phenology of ten canopy tree species from a range of functional types in the Atlantic lowlands of Costa Rica to test for seasonal and interannual patterns. We measured ...

2018
Petros T. Damos Sibylle C. Stoeckli Alexandros Rigas

Citation: Damos PT, Stoeckli SC and Rigas A (2018) Editorial: Current Trends of Insect Physiology and Population Dynamics: Modeling Insect Phenology, Demography, and Circadian Rhythms in Variable Environments. Front. Physiol. 9:336. doi: 10.3389/fphys.2018.00336 Editorial: Current Trends of Insect Physiology and Population Dynamics: Modeling Insect Phenology, Demography, and Circadian Rhythms i...

2014
Anne Charmantier Phillip Gienapp

There are multiple observations around the globe showing that in many avian species, both the timing of migration and breeding have advanced, due to warmer springs. Here, we review the literature to disentangle the actions of evolutionary changes in response to selection induced by climate change versus changes due to individual plasticity, that is, the capacity of an individual to adjust its p...

Journal: :Ecological applications : a publication of the Ecological Society of America 2014
Jeffrey M Diez Inés Ibáñez John A Silander Richard Primack Hiroyoshi Higuchi Hiromi Kobori Ananda Sen Timothy Y James

Phenological events, such as the timing of flowering or insect emergence, are influenced by a complex combination of climatic and non-climatic factors. Although temperature is generally considered most important, other weather events such as frosts and precipitation events can also influence many species' phenology. Non-climatic variables such as photoperiod and site-specific habitat characteri...

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