Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1080/22797254.2021.1934556 |
Lizenz  |
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| Titel (primär) | Towards forage resource monitoring in subtropical savanna grasslands: going multispectral or hyperspectral? |
| Autor | Ferner, J.; Linstädter, A.; Rogass, C.; Südekum, K.-H.; Schmidtlein, S. |
| Quelle | European Journal of Remote Sensing |
| Erscheinungsjahr | 2021 |
| Department | CLE |
| Band/Volume | 54 |
| Heft | 1 |
| Seite von | 364 |
| Seite bis | 384 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Keywords | Africa; rangeland; sremote-sensing based monitoring; forage; biomass production; nutritive value |
| Abstract | Forage supply of savanna grasslands plays a crucial role for local food
security and consequently, a reliable monitoring system could help to
better manage vital forage resources. To help installing such a
monitoring system, we investigated whether in-situ hyperspectral data
could be resampled to match the spectral resolution of multi- and
hyperspectral satellites; if the type of sensor affected model transfer;
and if spatio-temporal patterns of forage characteristics could be
related to environmental drivers. We established models for forage
quantity (green biomass) and five forage quality proxies (metabolisable
energy, acid/neutral detergent fibre, ash, phosphorus). Hyperspectral
resolution of the Hyperion satellite mostly resulted in higher
accuracies (i.e. higher R2, lower RMSE). When applied to
satellite data, though, the greater quality of the multispectral
Sentinel-2 satellite data leads to more realistic forage maps. By
analysing a three-year time series, we found plant phenology and
cumulated precipitation to be the most important environmental drivers
of forage supply. We conclude that none of the investigated satellites
provide optimal conditions for monitoring purposes. Future hyperspectral
satellite missions like EnMAP, combining the high information level of
Hyperion with the good data quality and resolution of Sentinel-2, will
provide the prerequisites for installing a regular monitoring service. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24784 |
| Ferner, J., Linstädter, A., Rogass, C., Südekum, K.-H., Schmidtlein, S. (2021): Towards forage resource monitoring in subtropical savanna grasslands: going multispectral or hyperspectral? Eur. J. Remote Sens. 54 (1), 364 - 384 10.1080/22797254.2021.1934556 |
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