نتایج جستجو برای: seasonal dynamics

تعداد نتایج: 498816  

Journal: :Environmental microbiology 2014
Brandon R Briggs Eoin L Brodie Lauren M Tom Hailiang Dong Hongchen Jiang Qiuyuan Huang Shang Wang Weiguo Hou Geng Wu Liuquin Huang Brian P Hedlund Chuanlun Zhang Paul Dijkstra Bruce A Hungate

Studies focusing on seasonal dynamics of microbial communities in terrestrial and marine environments are common; however, little is known about seasonal dynamics in high-temperature environments. Thus, our objective was to document the seasonal dynamics of both the physicochemical conditions and the microbial communities inhabiting hot springs in Tengchong County, Yunnan Province, China. The P...

Journal: :Proceedings. Biological sciences 2009
Vasilis Dakos Elisa Benincà Egbert H van Nes Catharina J M Philippart Marten Scheffer Jef Huisman

The species composition of plankton, insect and annual plant communities may vary markedly from year to year. Such interannual variability is usually thought to be driven by year-to-year variation in weather conditions. Here we examine an alternative explanation. We studied the effects of regular seasonal forcing on a multi-species predator-prey model consisting of phytoplankton and zooplankton...

Journal: :Journal of Geophysical Research 2010

A. Azizov M. Salavatian S. Suleymanov

Feeding habits of Caspian marine shad Alosa braschnikowii (Borodin, 1904), inhabiting in the western part of Caspian Sea such as prey spectrum and seasonal dynamics have been studied. As in other parts of Caspian Sea, throughout the year, the main hunt of Caspian marine shad constituted kilkas, gobies and shrimps while other groups of zoobenthos were represented in a lesser extent. Importance o...

2011
Zhengguo Li Peng Yang Yanglin Wang Qingbo Zhou Huajun Tang Hsiaofei Chang

The ecological and environmental conditions in semiarid areas are closely linked to landscape dynamics. This study examined the seasonal vegetation activities of landscape classes and dynamics in the Loess Plateau in North Shaanxi Province, China. Landscape dynamics were studied by comparing Landsat images in 1987 and 2007, and classified as landscape transitions, landscape variations and uncha...

Journal: :Epidemiology and infection 2014
Y-J Lin C-M Liao

Understanding how seasonality shapes the dynamics of tuberculosis (TB) is essential in determining risks of transmission and drug resistance in (sub)tropical regions. We developed a relative fitness-based multidrug-resistant (MDR) TB model incorporated with seasonality and a probabilistic assessment model to assess infection risk in Taiwan regions. The model accurately captures the seasonal tra...

Journal: :Atmospheric Environment 2008

2014
Federico Magnani Beñat Olascoaga eija Juurola Paulo Pinho Petr lukeš Albert Porcar-Castell

Epicuticular waxes influence leaf reflectance, but the spatiotemporal dynamics in their reflectance properties have not been properly characterized, and its consequences remain unknown. In this study, we analysed the seasonal changes in wax reflectance of Scots pine needles. It tended to decrease with needle age and towards lower positions within the canopy. In addition, we also identified a cl...

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