نتایج جستجو برای: ecological parameters

تعداد نتایج: 674765  

2014
Abhijit Mazumder Neloy Khare Pawan Govil

18 surface sediment samples collected from a north-south transect along the Indian Ocean have been analyzed for planktonic Foraminifera content. Among the other planktonic foraminiferal faunas, Globigerina bulloides was present substantially in all samples. Census data of G. bulloides were measured for different parameters (average size, mean proloculus size, coiling direction, and number of ch...

Journal: :CoRR 2017
Janetta Culita Alexandru Dumitrascu Dan Stefanoiu

The paper introduces a real-time monitoring and forecasting system for ecological phenomena. The process yields a collection of ecological parameters viewed as distributed time series, which are measured by means of wireless network of sensors. The acquired data are preliminary processed and modeled by using complex algorithms in view of prediction. There are three graphical user interfaces imp...

2010
O. Akintola

The study examines the changes in climatic elements and agronomic parameter (maize hectarage and output) for maize production in different ecological zones of Nigeria from 1980 2002. The study also evaluated the degree of variability in these parameters. To achieve these objectives, secondary data on climatic elements and agronomic parameters for 22years were analysed using two – way Analysis o...

Journal: :Ecological applications : a publication of the Ecological Society of America 2011
Yiqi Luo Kiona Ogle Colin Tucker Shenfeng Fei Chao Gao Shannon LaDeau James S Clark David S Schimel

Several forces are converging to transform ecological research and increase its emphasis on quantitative forecasting. These forces include (1) dramatically increased volumes of data from observational and experimental networks, (2) increases in computational power, (3) advances in ecological models and related statistical and optimization methodologies, and most importantly, (4) societal needs ...

2015
Piotr Magnuszewski Katarzyna Ostasiewicz Robin Chazdon Carl Salk Michal Pajak Jan Sendzimir Krister Andersson Paul Adam

Shifting cultivation is a traditional agricultural practice in most tropical regions of the world and has the potential to provide for human livelihoods while hosting substantial biodiversity. Little is known about the resilience of shifting cultivation to increasing agricultural demands on the landscape or to unexpected disturbances. To investigate these issues, we develop a simple social-ecol...

2014
SHULI NIU YIQI LUO MICHAEL C. DIETZE TREVOR F. KEENAN ZHENG SHI JIANWEI LI STUART CHAPIN

In this rapidly changing world, improving the capacity to predict future dynamics of ecological systems and their services is essential for better stewardship of the earth system. Prediction relies on models that describe our understanding of the major processes that underlie system dynamics and data about these processes and the present state of ecosystems. Prediction becomes more effective wh...

2015
J. P. Stellmann A. Neuhaus N. Götze S. Briken C. Lederer M. Schimpl C. Heesen M. Daumer

BACKGROUND Ecological validity implicates in how far clinical assessments refer to real life. Short clinical gait tests up to ten meters and 2- or 6-Minutes Walking Tests (2MWT/6MWT) are used as performance-based outcomes in Multiple Sclerosis (MS) studies and considered as moderately associated with real life mobility. OBJECTIVE To investigate the ecological validity of 10 Meter Walking Test...

2016
Timothée Poisot Daniel B. Stouffer

Ecological networks represent the backbone of biodiversity. As species diversify over macro-evolutionary time-scales, the structure of these networks changes; this happens because species are gained and lost, and therefore add or remove interactions in their communities. The mechanisms underlying such dynamic changes in ecological network structure, however, remain poorly understood. Here we sh...

2009
John Eid

www.sciencemag.org (this information is current as of February 2, 2009 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/323/5910/133 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/1162986/DC1 can be found at:...

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