نتایج جستجو برای: phenology

تعداد نتایج: 6635  

2016
Sara L Hermann Saisi Xue Logan Rowe Elizabeth Davidson-Lowe Andrew Myers Bahodir Eshchanov Christie A Bahlai

The timing of events in the life history of temperate insects is most typically primarily cued by one of two drivers: photoperiod or temperature accumulation over the growing season. However, an insect's phenology can also be moderated by other drivers like rainfall or the phenology of its host plants. When multiple drivers of phenology interact, there is greater potential for phenological asyn...

2008
Oscar Gordo

Many studies have reported statistically significant associations between bird migratory phenology and climatic variables, and, consequently, it is mostly accepted that recent shifts in migration dates are a reaction to present climate change. Impacts of weather and climate on departure date, progression and stopover frequency and duration have been reviewed in order to explain the current know...

Journal: :Remote Sensing 2015
Mingquan Wu Xiaoyang Zhang Wenjiang Huang Zheng Niu Changyao Wang Wang Li Pengyu Hao

With the recent launch of new satellites and the developments of spatiotemporal data fusion methods, we are entering an era of high spatiotemporal resolution remote-sensing analysis. This study proposed a method to reconstruct daily 30 m remote-sensing data for monitoring crop types and phenology in two study areas located in Xinjiang Province, China. First, the Spatial and Temporal Data Fusion...

2018
Hebah S Mejbel Andrew M Simons

Environmental unpredictability is known to result in the evolution of bet-hedging traits. Variable dormancy enhances survival through harsh conditions, and is widely cited as a diversification bet-hedging trait. The floating aquatic plant, Spirodela polyrhiza (Greater Duckweed), provides an opportunity to study diversification because although partially reliable seasonal cues exist, its growing...

2014
Floriane Plard Jean-Michel Gaillard Tim Coulson A. J. Mark Hewison Daniel Delorme Claude Warnant Christophe Bonenfant

Marked impacts of climate change on biodiversity have frequently been demonstrated, including temperature-related shifts in phenology and life-history traits. One potential major impact of climate change is the modification of synchronization between the phenology of different trophic levels. High phenotypic plasticity in laying date has allowed many bird species to track the increasingly early...

2012
Jianyang Xia Shiqiang Wan

BACKGROUND The longer growing season under climate warming has served as a crucial mechanism for the enhancement of terrestrial carbon (C) sink over the past decades. A better understanding of this mechanism is critical for projection of changes in C cycling of terrestrial ecosystems. METHODOLOGY/PRINCIPAL FINDINGS A 4-year field experiment with day and night warming was conducted to examine ...

Journal: :International journal of biometeorology 2014
Cécile F Dantec Yann Vitasse Marc Bonhomme Jean-Marc Louvet Antoine Kremer Sylvain Delzon

With global warming, an advance in spring leaf phenology has been reported worldwide. However, it is difficult to forecast phenology for a given species, due to a lack of knowledge about chilling requirements. We quantified chilling and heat requirements for leaf unfolding in two European tree species and investigated their relative contributions to phenological variations between and within po...

Journal: :International journal of biometeorology 2016
Shin Nagai Kenlo Nishida Nasahara Tomoharu Inoue Taku M Saitoh Rikie Suzuki

To accurately evaluate the responses of spatial and temporal variation of ecosystem functioning (evapotranspiration and photosynthesis) and services (regulating and cultural services) to the rapid changes caused by global warming, we depend on long-term, continuous, near-surface, and satellite remote sensing of phenology over wide areas. Here, we review such phenological studies in Japan and di...

Journal: :Remote Sensing 2018
Ze He Shihua Li Yong Wang Leiyu Dai Sen Lin

Accurate estimation and monitoring of rice phenology is necessary for the management and yield prediction of rice. The radar backscattering coefficient, one of the most direct and accessible parameters has been proved to be capable of retrieving rice growth parameters. This paper aims to investigate the possibility of monitoring the rice phenology (i.e., transplanting, vegetative, reproductive,...

Journal: :Tree physiology 2012
Peter J Gould Constance A Harrington J Bradley St Clair

The timing of periodic life cycle events in plants (phenology) is an important factor determining how species and populations will react to climate change. We evaluated annual patterns of basal-area and height growth of coast Douglas-fir (Pseudotusga menziesii var. menziesii (Mirb.) Franco) seedlings from four seed sources that were planted in four diverse environments as part of the Douglas-fi...

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