منابع مشابه
Models of Plankton Biomass Spectra
The goal of this thesis is to study the causes and consequences of the size structure of marine planktonic ecosystems. To this end, a theoretical (continuous) size spectrum model was developed. Phytoplankton and zooplankton biomass is represented in the model as functions of their respective biomass size spectrums. Thus, the model allows the natural recovery of the continuous size spectrum for ...
متن کاملGlobal marine plankton functional type biomass distributions: Phaeocystis spp
The planktonic haptophyte Phaeocystis has been suggested to play a fundamental role in the global biogeochemical cycling of carbon and sulphur, but little is known about its global biomass distribution. We have collected global microscopy data of the genus Phaeocystis and converted abundance data to carbon biomass using species-specific carbon conversion factors. Microscopic counts of single-ce...
متن کاملDeriving Biomass Estimation Equation
--Trees of seven species sampled fro. a plantation over 7 years were used to derive weight equations to predict primary tree c~onents. The seven species required the use of five different model fo~ to fnsure the greatest precision. Regardless of model for., all equations include variables for tree di ... ter. tree height, age. and mwlber of trees planted. The most precise estiutes are found by ...
متن کاملForest Biomass Estimation using Polarimetric SAR Interferometry
Forest biomass is one of the most important parameters for global carbon stock modelling yet can only be estimated with great uncertainties. Unfortunately, conventional remote sensing techniques for the estimation of forest biomass are not able to provide estimates on a global scale. An alternative approach is based on forest height estimates from single frequency polarimetric-interferometric S...
متن کاملBiomass Estimation Using Digital Photogrammetric Cameras
Estimating and modelling biomass can be helpful for biomass management. It is also interesting to calculate the amount of biomass in a certain area for carbon implications, as indicated by the Kyoto protocol. In the past remote sensing techniques have been able to estimate biomass by using reflectance in the both the red and the near infrared wavelengths. Nowadays the sensors in the digital pho...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1991
ISSN: 0001-4966
DOI: 10.1121/1.401524