Urban carriage horses 1999--status and concerns     

Merriam JG 《Journal of the American Veterinary Medical Association》2000,216(8):1261-1262

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MEANING OF THE SPANISH WORD GAVILAN     

Merriam CH 《Science (New York, N.Y.)》1908,28(709):147

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SOME LITTLE-KNOWN BASKET MATERIALS     

Merriam CH 《Science (New York, N.Y.)》1903,17(438):826-827

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GRIZZLY BEARS: SKULLS WANTED     

Merriam CH 《Science (New York, N.Y.)》1914,39(1003):424-426

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ZONE TEMPERATURES     

Merriam CH 《Science (New York, N.Y.)》1899,9(212):116-117

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Simulating carbon dynamics of the boreal forest in Pukaskwa National Park     

I. A. Nalder  H. G. Merriam 《Water, air, and soil pollution》1995,82(1-2):283-298

The development of forests in Pukaskwa National Park, Ontario, Canada, was simulated over 150 years to investigate boreal carbon dynamics and to test the feasibility of simulating large tracts of heterogeneous boreal forest. Pukaskwa National Park, located on the north shore of Lake Superior, encompasses 1835 km² of the Superior Section of the boreal forest. We developed a patch model, called BOPAS (BOreal PAtch Simulator), to simulate the development of carbon pools as a function of environmental parameters. Using GIS techniques, we divided the park into patches defined by a unique combination of forest type, age, climatic variables, soil type and topography, then used a forest gap model to develop biomass-over-time relationships for each patch type. BOPAS uses these relationships to simulate the development of carbon pools for trees, moss and litter/humus. We report results for constant climate, but BOPAS can be easily adapted to changing climate scenarios. Good results were obtained for predictions of carbon storage in trees. The initial value was 3.61 kg C m^?2, which agrees closely with literature values. With no disturbance, tree carbon increased to a maximum of 3.97 kg C m^?2 at 30 years then slowly declined. Carbon storage was stabilized by introducing fire as a disturbance with a return interval of 100 years. Predicted forest floor carbon density, however, was much lower than expected, being less than half that of trees. It was anticipated to be substantially higher than tree carbon density based on a preliminary survey in the park and values reported in the literature. Published data, however, are very limited in coverage and give such a wide range of values that it was impossible to draw any firm conclusions about the validity of the model. BOPAS also showed that the forest floor carbon pool was relatively constant over the timescales of the simulation, but no published data were available to test this prediction. In summary, this work has demonstrated the feasibility of the BOPAS approach, but has high-lighted the necessity for more extensive data on forest floor carbon storage and dynamics.  相似文献   

AUDUBON AND HIS JOURNALS     

Merriam CH 《Science (New York, N.Y.)》1898,7(166):289-296

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Wind generators and the oil reserve     

Merriam MF 《Science (New York, N.Y.)》1979,203(4384):954-955

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Genome maps 1991 [wall chart   总被引：1，自引：0，他引：1  

M Chipperfield  M Maidek  P Pearson  M Ashburner  D M Glover  R D Saunders  I Duncan  D Hartl  J Merriam  G Lee 《Science (New York, N.Y.)》1991,254(5029):247-262

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ON THE OCCURRENCE OF DESMOSTYLUS,MARSH     

Merriam JC 《Science (New York, N.Y.)》1906,24(605):151-152

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