Composition and seasonal changes of the bird community in the west pampa grasslands of Argentina

2003 ◽  
Vol 74 (1) ◽  
pp. 59-65 ◽  
Author(s):  
J. P. Isacch ◽  
M. S. Bo ◽  
N. O. Maceira ◽  
M. R. Demaría ◽  
S. Peluc
Keyword(s):  
Seasonal Changes ◽  
Bird Community ◽  
The West

scholarly journals Seasonality of forest invertebrates in Hong Kong, South China

2002 ◽  
Vol 18 (4) ◽  
pp. 637-644 ◽  
Author(s):  
Kwok Hon Kai ◽  
Richard T. Corlett
Keyword(s):  
Hong Kong ◽  
Seasonal Changes ◽  
Bird Community ◽  
Absolute Minimum ◽  
Northern Margin ◽  
Plant Names ◽  
Bird Fauna ◽  
Summer Temperatures ◽  
Formed Part ◽  
The Tropics

Because of its position on the northern margin of the tropics (22° 17′N) and the southern coast of a huge continent, Hong Kong has a climate in which both temperature and rainfall are highly seasonal. Although summer temperatures are equatorial, the January mean is only 15.8 °C,and the absolute minimum recorded at sea level is 0 °C (Dudgeon & Corlett 1994). As a result, all aspects of the ecology of Hong Kong show seasonal changes. The most dramatic changes occur in the bird fauna, with the majority of species migratory (Carey et al. 2001). The winter fruiting peak in secondary shrublands and the forest understorey coincides with the arrival of partially frugivorous migrant robins and thrushes (Corlett 1993). However, while resident insectivore-frugivores consume almost entirely fruit during this period (Corlett 1998), all the winter visitors continue to eat insects and some (e.g. Phylloscopus warblers) are entirely insectivorous. The study of insect seasonality reported here formed part of a 30-mo study of the seasonality of a forest bird community in Hong Kong (Kwok & Corlett 1999, 2000). Plant names follow Corlett et al. (2000).

Seasonal Changes in Net Phytoplankton of the West-Central North Sea

1982 ◽  
Vol 62 (1) ◽  
pp. 15-23 ◽  
Author(s):  
J. W. Horwood ◽  
J. H. Nichols ◽  
Ruth Harrop
Keyword(s):  
Seasonal Changes ◽  
East Coast ◽  
Small Region ◽  
Zooplankton Biomass ◽  
The West ◽  
North East ◽  
The North ◽  
Central North Sea ◽  
Eggs And Larvae ◽  
Net Phytoplankton

INTRODUCTIONIn 1976 the Fisheries Laboratory, Lowestoft, carried out 13 plankton sampling cruises off the north-east coast of England. They spanned the months February-November. From these cruises Harding et al. (1978) described the distributions of surface chlorophyll and nutrients and the production offish eggs and larvae. Reynolds (1978) described in more detail the distributions of chlorophyll and phaeopigments throughout the year, and Horwood (1982) detailed the distribution of zooplankton biomass. This study presents the species composition of the algae from a small region of the survey area illustrated in Fig. 1.

scholarly journals Distribution Characteristics and Influencing Factors of PM2.5 in Northern-Taiwan

2021 ◽  
Vol 257 ◽  
pp. 03046
Author(s):  
Haoyuan Zhang
Keyword(s):  
Geographical Distribution ◽  
Rural Areas ◽  
Seasonal Changes ◽  
Pearson Correlation ◽  
Distribution Characteristics ◽  
Weak Correlation ◽  
Concentration Data ◽  
The West ◽  
Taiwan Province ◽  
Northern Taiwan

This paper analyzes the concentration data of PM2.5, SO2, NO2, CO and O3 recorded at 25 monitoring points in northern Taiwan in 2015. The geographical distribution and seasonal changes of PM2.5 are assessed. The geographical distribution is higher in cities than in rural areas, and higher in the west and the middle than the east. In the seasonal changes, the pollution is the most serious in spring and lightest in autumn. The author uses Pearson correlation coefficient to analyze the correlation between PM2.5 and gaseous pollutants (SO2, NO2, CO and O3). The PM2.5 concentration in Northern-Taiwan Province has a strong correlation with SO2, NO2 and CO, and a weak correlation with O3.

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