نتایج جستجو برای: seasonal fluctuations

تعداد نتایج: 135520  

Journal: :Transactions of the Architectural Institute of Japan 1969

Journal: :Eurasian journal of soil science 2023

Phthalates are endocrine disruptors, reported to cause deformities and reproductive damages in animals. Numerous studies the presence of phthalates water samples rivers, wetlands, estuaries, while scenario case ponds is different, however they as an integral part biosphere. In this study, level phthalates’ contamination collected from different Amritsar district for four consecutive seasons two...

1996
IRINA KRASOVSKAIA I. Krasovskaia

A river regime describes the average seasonal behaviour of flow. This seasonal pattern reflects climatic and physiographic conditions in the basin. An inherent characteristic of a flow regime is its stability, i.e. regularity or irregularity of the seasonal pattern. A temperature rise, as predicted by climatic models, might cause changes in the patterns and stability of river flow regimes. Sens...

2008
Matthew G. Karlaftis

In this paper we discuss the general issue of forecasting highly seasonal demand in regional airports, where peak flows approach airport capacity. For this, we propose a modeling combination, dynamic Tobit models with GARCH errors/disturbances, that is able to capture many of the shortcomings of most traditional models. Models are calibrated using monthly passenger and flight data for a 20 year...

2017
Gustavo S Betini Andrew G McAdam Cortland K Griswold D Ryan Norris

Although seasonality is widespread and can cause fluctuations in the intensity and direction of natural selection, we have little information about the consequences of seasonal fitness trade-offs for population dynamics. Here we exposed populations of Drosophila melanogaster to repeated seasonal changes in resources across 58 generations and used experimental and mathematical approaches to inve...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1999
G E Bentley T J Van't Hof G F Ball

Neuroplasticity in the vocal control system of songbirds is strongly influenced by seasonal fluctuations in circulating testosterone. These seasonally plastic telencephalic structures are implicated in the learning and production of song in songbirds. The role of the indoleamine melatonin in seasonal adaptations in birds has remained unclear. In this experiment, European starlings were castrate...

2001
Patricia A. Holden Arturo A. Keller

The current regulatory trend towards accepting intrinsic bioremediation as a long-term management scheme for residual organic pollutants in the subsurface for fuel spills is based on statistical evaluations of plume behavior for a limited array of pollutants. The effectiveness of intrinsic bioremediation towards protecting water supplies, and hence human health, is not known for many pollutants...

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