Primary production and nitrogen allocation of field grown sugar maples in relation to nitrogen availability

1985 ◽  
Vol 1 (2) ◽  
pp. 135-154 ◽  
Author(s):  
J. Mar Lennon ◽  
John D. Aber ◽  
Jerry M. Melillo
Keyword(s):  
Primary Production ◽  
Nitrogen Availability ◽  
Nitrogen Allocation ◽  
Sugar Maples

scholarly journals Climate change and primary production: Forty years in a bunchgrass prairie

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243496
Author(s):  
Gary E. Belovsky ◽  
Jennifer B. Slade
Keyword(s):  
Climate Change ◽  
Species Composition ◽  
Primary Production ◽  
Plant Species ◽  
Climate Changes ◽  
Nitrogen Availability ◽  
Invasive Plant ◽  
Plant Species Composition ◽  
Plant Senescence ◽  
Geographical Scale

Over the past 109 years, a Montana intermountain bunchgrass prairie annually became warmer (0.7°C) and drier (27%). The temperature and precipitation trends continued since 1978, as we studied nitrogen availability, annual aboveground primary production (ANPP), plant phenology and species composition. Given the annual increase in temperature and decrease in precipitation, ANPP might be expected to decline; however, it increased by 110%, as the period of greatest production (late-May–June) became wetter and cooler, counter to the annual pattern, and this was strongest at lower elevations. Grass production increased by 251%, while dicot production declined by 65%, which increased grass relative abundance by 54%. Summer temperatures increased 12.5% which increased plant senescence by 119% and decreased fall plant regrowth by 68%. More intense summer senescence changed plant species composition in favor of more drought tolerant species. The greater ANPP and summer senescence may increase susceptibility for fire, but fire tolerance of the plant species composition did not change. Invasive plant species increased 108% over the study with annual grasses accounting for >50% of this increase, which further increased summer plant senescence. Therefore, seasonal climate changes at a smaller geographical scale (local), rather than average annual climate changes over a larger geographical scale (regional), may better reflect plant community responses, and this makes ecological forecasting of climate change more difficult.

Fine Roots, Net Primary Production, and Soil Nitrogen Availability: A New Hypothesis

Ecology ◽  
1985 ◽  
Vol 66 (4) ◽  
pp. 1377-1390 ◽  
Author(s):  
Knute J. Nadelhoffer ◽  
John D. Aber ◽  
Jerry M. Melillo
Keyword(s):  
Primary Production ◽  
Soil Nitrogen ◽  
Fine Roots ◽  
Nitrogen Availability ◽  
Net Primary Production ◽  
Soil Nitrogen Availability ◽  
New Hypothesis

PRESENT AND FUTURE PROSPECTS FOR FORESTRY IN THE CENTRAL PUMICE REGION

1971 ◽  
pp. 14-17
Author(s):  
J. Ure
Keyword(s):  
New Zealand ◽  
Primary Production ◽  
Future Prospects ◽  
Export Markets ◽  
Local Conditions

The region contains half the area of exotic forest in New Zealand and the major industries dependent thereon. Both are expanding rapidly to meet promising export markets. Local conditions are particularly favourable for this form of primary production and continued expansion is expected.

Primary Production of Phytoepiphyton in Water Bodies of Kiev

2008 ◽  
Vol 44 (4) ◽  
pp. 35-41 ◽  
Author(s):  
O. A. Sosnovskaya ◽  
P. D. Klochenko ◽  
G. V. Kharchenko
Keyword(s):  
Primary Production ◽  
Water Bodies
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