Determination of Peak Standing Crop Biomass of Herbaceous Shoots by the Harvest Method

1968 ◽  
Vol 79 (2) ◽  
pp. 429 ◽  
Author(s):  
Charles R. Malone
Keyword(s):  
Standing Crop ◽  
Peak Standing Crop ◽  
Harvest Method ◽  
Crop Biomass

Estimating above- and below-ground macrophyte production in Scirpus tidal marshes

1988 ◽  
Vol 66 (2) ◽  
pp. 368-374 ◽  
Author(s):  
Jean-François Giroux ◽  
Jean Bédard
Keyword(s):  
Standing Crop ◽  
Belowground Biomass ◽  
Tidal Marshes ◽  
Optimal Size ◽  
Lawrence Estuary ◽  
Plant Parts ◽  
Peak Standing Crop ◽  
Below Ground ◽  
The Difference ◽  
St Lawrence Estuary

Different methods to estimate primary production of Scirpus marshes of the St. Lawrence estuary were compared. Quadrats 25 × 25 cm and cores 10 cm in diameter were found to be the optimal size to sample above- and below-ground standing crops, respectively. Ash content for different plant parts of various species was measured to obtain more accurate estimates of organic matter. A series of allometric equations relating stem height and mass were developed to estimate aerial standing crop from permanent nondestructively sampled plots. This method, however, overestimated standing crop compared with the destructive (harvest) method. The relationship between the above- and below-ground standing crop was also determined for the dominant species and used to predict belowground biomass without destructive sampling. Finally, the Smalley method provided the best estimates of net annual above- and below-ground production when losses attributed to decomposition were not considered. For less intensive studies, however, the methods based on peak standing crop and on the difference between maximum and minimum biomass would yield good approximations of above- and below-ground production.

Volume measurements for quicker determination of forest litter standing crop

2009 ◽  
Vol 25 (6) ◽  
pp. 665-669 ◽  
Author(s):  
Scott A. Parsons ◽  
Luke P. Shoo ◽  
Stephen E. Williams
Keyword(s):  
Standing Crop ◽  
Water Movement ◽  
Forest Litter ◽  
Plant Performance ◽  
Turnover Rates ◽  
Spatial Coverage ◽  
Volume Measurements ◽  
Litter Turnover ◽  
Litter Standing Crop

Litter standing crop (LSC) is the quantity of plant detritus on the floor in forested environments. Knowledge of LSC is important in understanding many ecological phenomena. These include studies of litterfall, decomposition/litter turnover rates and nutrient cycling (Anderson et al. 1983, Dent et al. 2006), general plant performance (Benítez-Malvido & Kossmann-Ferraz 1999), other ecosystem processes such as the effects of fire (Odiwe & Muoghalu 2003) and fauna (Frith & Frith 1990, Giaretta et al. 1999, Levings & Windsor 1985). The determination of accurate annual average LSC data, may require monitoring over long periods due to seasonality and sometimes sporadic nature of litterfall and decomposition rates (Clark et al. 2001). Furthermore, the effects of topography and water movement create the need for both representative site selection and sufficient spatial coverage.

Community structure and standing crop biomass of a mangrove forest in Futian Nature Reserve, Shenzhen, China

Hydrobiologia ◽  
1995 ◽  
Vol 295 (1-3) ◽  
pp. 193-201 ◽  
Author(s):  
N. F. Y. Tam ◽  
Y. S. Wong ◽  
C. Y. Lan ◽  
G. Z. Chen
Keyword(s):  
Community Structure ◽  
Standing Crop ◽  
Mangrove Forest ◽  
Nature Reserve ◽  
Crop Biomass

Predicting Peak Standing Crop on Annual Range Using Weather Variables

1989 ◽  
Vol 42 (6) ◽  
pp. 508 ◽  
Author(s):  
Melvin R. George ◽  
William A. Williams ◽  
Neil K. McDougald ◽  
W. James Clawson ◽  
Alfred H. Murphy
Keyword(s):  
Standing Crop ◽  
Weather Variables ◽  
Annual Range ◽  
Peak Standing Crop

Diversity and productivity of hypogeous fungal sporocarps in a variably thinned Douglas-fir forest

1999 ◽  
Vol 29 (8) ◽  
pp. 1259-1268 ◽  
Author(s):  
Wes Colgan III ◽  
Andrew B Carey ◽  
James M Trappe ◽  
Randy Molina ◽  
David Thysell
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Standing Crop ◽  
Variable Density ◽  
Douglas Fir ◽  
Managed Forests ◽  
Hypogeous Fungi ◽  
Management Techniques ◽  
Crop Biomass ◽  
Comprehensive Study

Although ecosystem management techniques are designed to enhance species diversity in managed forests, no comprehensive study has been conducted to evaluate effects of such techniques on diversity and productivity of hypogeous fungi (truffles). During this study, truffles were collected in a 55- to 65-year-old Douglas-fir forest from March 1993 through December 1995 at approximately 6-week intervals. Half of the stands served as controls, half were assigned a variable density thinning (VDT) treatment. A VDT stand comprised a mosaic of patches thinned to different densities of standing live trees. To further evaluate the effect of harvesting impacts, this mosaic was divided into two thinning categories, lightly thinned and heavily thinned areas. Truffle standing crop varied greatly but generally was highest in spring with a smaller peak in the fall. At least some sporocarps were found year round, with winter having the lowest biomass and species richness. Overall standing crop biomass (over all seasons) was significantly lower in VDT stands compared with control stands. The abundance of Gautieria and Hysterangium species was lower in thinned stands, while Melanogaster species diversity and productivity were highest in these stands.

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