Linking coral river runoff proxies with climate variability, hydrology and land-use in Madagascar catchments

Joseph Maina*, Hans de Moel, Jan E. Vermaat, J. Henrich Bruggemann, Mireille M M Guillaume, Craig A. Grove, Joshua S. Madin, Regina Mertz-Kraus, Jens Zinke

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Understanding the linkages between coastal watersheds and adjacent coral reefs is expected to lead to better coral reef conservation strategies. Our study aims to examine the main predictors of environmental proxies recorded in near shore corals and therefore how linked near shore reefs are to the catchment physical processes. To achieve these, we developed models to simulate hydrology of two watersheds in Madagascar. We examined relationships between environmental proxies derived from massive Porites spp. coral cores (spectral luminescence and barium/calcium ratios), and corresponding time-series (1950-2006) data of hydrology, climate, land use and human population growth. Results suggest regional differences in the main environmental drivers of reef sedimentation: on annual time-scales, precipitation, river flow and sediment load explained the variability in coral proxies of river discharge for the northeast region, while El Niño-Southern Oscillation (ENSO) and temperature (air and sea surface) were the best predictors in the southwest region.

Original languageEnglish
Pages (from-to)2047-2059
Number of pages13
JournalMarine Pollution Bulletin
Volume64
Issue number10
DOIs
Publication statusPublished - Oct 2012

Fingerprint Dive into the research topics of 'Linking coral river runoff proxies with climate variability, hydrology and land-use in Madagascar catchments'. Together they form a unique fingerprint.

  • Cite this

    Maina, J., de Moel, H., Vermaat, J. E., Henrich Bruggemann, J., Guillaume, M. M. M., Grove, C. A., ... Zinke, J. (2012). Linking coral river runoff proxies with climate variability, hydrology and land-use in Madagascar catchments. Marine Pollution Bulletin, 64(10), 2047-2059. https://doi.org/10.1016/j.marpolbul.2012.06.027