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Title: Remote sensing of natural Scots pine regeneration
Author: Shaw, David
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2001
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The regeneration of native Scots pine forest has become an important objective of conservation management within Scotland. Management practices are being employed to encourage regeneration by natural means, but quantitatively monitoring progress is difficult to achieve on the ground. The study explores the potential application of optical remote sensing to monitoring natural regeneration. However, there is currently a lack of understanding of the detailed spectral and spatial properties of such semi-natural landscapes. The study addresses this problem through detailed analysis of the spectral and spatial properties of regions of natural regeneration at Inshriach and Rothiemurcus in the Cairngorms National Nature Reserve, Scotland. High-spectral resolution field-spectroradiometeric data (400 - 2500 nm) were collected over the growing seasons of 1997 and 1998 over sample plots. A method was developed to measure Leaf Area Index (LAI) within the sample plots and correlation analysis was used to assess the relationship of both LAI and percentage cover (PC) with reflectance and first-derivative reflectance. LAI and PC correlated most strongly with reflectance indices involving red and NIR wavelengths, such as the Simple Ratio (SR), NDVI and R752/R722. Derivative indices involving the red-edge, (D730/D700 and D718/D703), the green-edges (D520 and D570), and the NIR at D1150, also correlated strongly with LAI and PC. Two peaks were identified on the derivatives red-edge feature (D719 and D703), with D719 becoming more prominent with increasing LAI and PC. Red-edge position correlated more strongly with PC than with LAI, but a sudden switching of REP to longer wavelengths was identified with increasing sapling amount, rather than a smooth progression. These relationships were unaffected by seasonal changes in the heather understorey reflectance at the sites investigated. A hybrid geometric-optical canopy reflectance model (FLIGHT) was used to simulate the canopy reflectance of the sample plots. Model scenarios were run to account for changing LAI, PC and crown needle density.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available