scholarly journals Improved estimates of net primary production, growth, and standing crop of Macrocystis pyrifera in Southern California

Ecology ◽  
2018 ◽  
Vol 99 (9) ◽  
pp. 2132-2132 ◽  
Author(s):  
Andrew Rassweiler ◽  
Daniel C. Reed ◽  
Shannon L. Harrer ◽  
J. Clint Nelson
Keyword(s):  
Primary Production ◽  
Standing Crop ◽  
Southern California ◽  
Net Primary Production ◽  
Macrocystis Pyrifera ◽  
Production Growth

scholarly journals NET PRIMARY PRODUCTION, GROWTH, AND STANDING CROP OFMACROCYSTIS PYRIFERAIN SOUTHERN CALIFORNIA

Ecology ◽  
2008 ◽  
Vol 89 (7) ◽  
pp. 2068-2068 ◽  
Author(s):  
Andrew Rassweiler ◽  
Katie K. Arkema ◽  
Daniel C. Reed ◽  
Richard C. Zimmerman ◽  
Mark A. Brzezinski
Keyword(s):  
Primary Production ◽  
Standing Crop ◽  
Southern California ◽  
Net Primary Production ◽  
Production Growth

scholarly journals Terrestrial trophic dynamics in the Canadian Arctic

2003 ◽  
Vol 81 (5) ◽  
pp. 827-843 ◽  
Author(s):  
Charles J Krebs ◽  
Kjell Danell ◽  
Anders Angerbjörn ◽  
Jep Agrell ◽  
Dominique Berteaux ◽  
...  
Keyword(s):  
Primary Production ◽  
Standing Crop ◽  
Net Primary Production ◽  
Canadian Arctic ◽  
Faecal Pellet ◽  
Trophic Dynamics ◽  
Balance Model ◽  
Arctic Ecosystems ◽  
Large Herbivore ◽  
Tundra Ecosystems

The Swedish Tundra Northwest Expedition of 1999 visited 17 sites throughout the Canadian Arctic. At 12 sites that were intensively sampled we estimated the standing crop of plants and the densities of herbivores and predators with an array of trapping, visual surveys, and faecal-pellet transects. We developed a trophic-balance model using ECOPATH to integrate these observations and determine the fate of primary and secondary production in these tundra ecosystems, which spanned an 8-fold range of standing crop of plants. We estimated that about 13% of net primary production was consumed by herbivores, while over 70% of small-herbivore production was estimated to flow to predators. Only 9% of large-herbivore production was consumed by predators. Organization of Canadian Arctic ecosystems appears to be more top-down than bottom-up. Net primary production does not seem to be herbivore-limited at any site. This is the first attempt to integrate trophic dynamics over the entire Canadian Arctic.

scholarly journals Quantifying and mapping the human appropriation of net primary production in earth's terrestrial ecosystems

2007 ◽  
Vol 104 (31) ◽  
pp. 12942-12947 ◽  
Author(s):  
H. Haberl ◽  
K. H. Erb ◽  
F. Krausmann ◽  
V. Gaube ◽  
A. Bondeau ◽  
...  
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Terrestrial Ecosystems
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