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- W2000975135 abstract "In this paper we evaluate the effectiveness of using optical image analysis to determine plant morphology for an emergent species of salt marsh vegetation, threesquare bulrush (Schoenoplectus pungens), and compare the results to conventional vegetation measurement methods. We find that mean stem height may be estimated optically to within 10% of mean stem height measured with conventional methods and that total above ground biomass may be estimated by lateral percent cover values between 0 and 70% (R2 = 0.89, linear regression) within a 10 cm–60 cm depth of vegetation. Additionally, we show that stem height may be used to estimate stem diameter by linear regression (R2 = 0.94). The product of the plant stem height, stem diameter and density measured by conventional methods are shown to correspond with the horizontal two-dimensional projection of vegetation estimated by image analysis. The optical method provided robust estimates when the depth of field is between 10 cm and 60 cm. When the depth of field exceeded 60 cm, the images were saturated, resulting in a loss of information." @default.
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- W2000975135 date "2015-03-01" @default.
- W2000975135 modified "2023-09-26" @default.
- W2000975135 title "Accuracy of optical image analysis compared to conventional vegetation measurements for estimating morphological features of emergent vegetation" @default.
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- W2000975135 doi "https://doi.org/10.1016/j.ecss.2014.12.051" @default.
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