Shrimp pond effluent dominates foliar nitrogen in disturbed mangroves as mapped using hyperspectral imagery

Anas Fauzi*, Andrew K. Skidmore, Hein van Gils, Martin Schlerf, Ignas M. A. Heitkönig

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Conversion of mangroves to shrimp ponds creates fragmentation and eutrophication. Detection of the spatial variation of foliar nitrogen is essential for understanding the effect of eutrophication on mangroves. We aim (i) to estimate nitrogen variability across mangrove landscapes of the Mahakam delta using airborne hyperspectral remote sensing (HyMap) and (ii) to investigate links between the variation of foliar nitrogen mapped and local environmental variables. In this study, multivariate prediction models achieved a higher level of accuracy than narrow-band vegetation indices, making multivariate modeling the best choice for mapping. The variation of foliar nitrogen concentration in mangroves was significantly influenced by the local environment: (1) position of mangroves (seaward/landward), (2) distance to the shrimp ponds, and (3) predominant mangrove species. The findings suggest that anthropogenic disturbances, in this case shrimp ponds, influence nitrogen variation in mangroves. Mangroves closer to the shrimp ponds had higher foliar nitrogen concentrations.

Original languageEnglish
Pages (from-to)42-51
Number of pages10
JournalMarine Pollution Bulletin
Volume76
Issue number1-2
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Hyperspectral
  • Nitrogen concentrations
  • Mangroves
  • Eutrophication
  • Shrimp ponds
  • Mahakam delta

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