Effects of Ecological and Paleoecological Patterns on Subsistence and Paleoenvironmental Reconstructions

1981 ◽  
Vol 46 (1) ◽  
pp. 128-142 ◽  
Author(s):  
Frances B. King ◽  
Russell W. Graham

Spatial and temporal variations in human populations are, to a large extent, determined by the environmentally controlled distribution of biotic and abiotic resources. While archaeologists generally recognize this relationship, many fail to fully appreciate the complexity of either the changing environment, the ecological literature, or applications of ecological data to archaeological problems. It is important to apply modern ecological principles to archaeological problems, but the novelty of the principle should not preclude the nature of the problem to be solved. For example, the concepts of ecotone and edge effect are still applicable to archaeological problems concerning biotic boundaries such as those between forest and grassland even though it may be more appropriate to use an individualistic approach in research designs concerned with diffuse environmental and biotic gradients.

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Alex Saturday ◽  
Thomas J. Lyimo ◽  
John Machiwa ◽  
Siajali Pamba

AbstractBackground Microbial water quality serves to indicate health risks associated with the consumption of contaminated water. Nevertheless, little is known about the microbiological characteristics of water in Lake Bunyonyi. This study was therefore undertaken to examine the spatial and temporal variations of faecal indicator bacteria (FIB) in relation to physicochemical parameters in Lake Bunyonyi. Result The FIB concentration was consistently measured during sampling months and correlated with each other showing the presumed human faecal pollution in the lake. The highest concentration values for E. coli (64.7 ± 47.3 CFU/100 mL) and enterococci (24.6 ± 32.4 CFU/100 mL were obtained in the station close to the Mugyera trading centre. On a temporal basis, the maximum values were recorded during the rainy season in October 2019 (70.7 ± 56.5 CFU/100 mL for E. coli and 38.44 ± 31.8 CFU/100 mL for enterococci. FIB did not differ significantly among the study stations (p > 0.05) but showed significant temporal variations among the months (p < 0.05) with concentrations being significantly high in wet season than dry season (U = 794, p < 0.0001 for E. coli; U = 993.5, p = 0.008 for enterococci). Spearman’s rank correlation revealed that FIB concentrations were significantly positively correlated with turbidity and DO concentration levels (p < 0.05). Approximately 97.2% of the water samples had E. coli and enterococci concentrations levels below USEPA threshold for recreational waters. Likewise, 98.1 and 90.7% of samples recorded E. coli and enterococci counts exceeding the UNBS, APHA, WHO and EU threshold values for drinking water. Conclusion The FIB counts show that the Lake Bunyonyi water is bacteriologically unsuitable for drinking unless it is treated since the FIB pose health risks to consumers. Besides, the water can be used for recreational purposes.


2003 ◽  
Vol 28 (1) ◽  
pp. 129-150 ◽  
Author(s):  
J.F. Lynch ◽  
A.E. Newhall ◽  
B. Sperry ◽  
G. Gawarkiewicz ◽  
A. Fredricks ◽  
...  

BMC Cancer ◽  
2019 ◽  
Vol 19 (1) ◽  
Author(s):  
J. M. García-Torrecillas ◽  
M. C. Olvera-Porcel ◽  
M. Ferrer-Márquez ◽  
F. Rubio-Gil ◽  
M J. Sánchez ◽  
...  

2012 ◽  
Vol 22 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Tatiane M. Gogola ◽  
Paulo V. Sanches ◽  
Éder A. Gubiani ◽  
Pedro R. L. da Silva

2005 ◽  
Vol 68 (3-4) ◽  
pp. 173-196 ◽  
Author(s):  
Sun-Lin Chung ◽  
Mei-Fei Chu ◽  
Yuquan Zhang ◽  
Yingwen Xie ◽  
Ching-Hua Lo ◽  
...  

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