Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30174
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Phenology and Seasonal Ecosystem Productivity in an Amazonian Floodplain Forest
Author(s): Fonseca, Letícia D M
Dalagnol, Ricardo
Malhi, Yadvinder
Rifai, Sami W
Costa, Gabriel B
Silva, Thiago S F
Da Rocha, Humberto R
Tavares, Iane B
Borma, Laura S
Keywords: tropical wetlands
floodplain phenology
eddy covariance
GPP
MODIS
MAIAC
seasonality
Issue Date: 28-Jun-2019
Citation: Fonseca LDM, Dalagnol R, Malhi Y, Rifai SW, Costa GB, Silva TSF, Da Rocha HR, Tavares IB & Borma LS (2019) Phenology and Seasonal Ecosystem Productivity in an Amazonian Floodplain Forest. Remote Sensing, 11 (13), Art. No.: 1530. https://doi.org/10.3390/rs11131530
Abstract: everal studies have explored the linkages between phenology and ecosystem productivity across the Amazon basin. However, few studies have focused on flooded forests, which correspond to c.a. 14% of the basin. In this study, we assessed the seasonality of ecosystem productivity (gross primary productivity, GPP) from eddy covariance measurements, environmental drivers and phenological patterns obtained from the field (leaf litter mass) and satellite measurements (enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer/multi-angle implementation correction (MODIS/MAIAC)) in an Amazonian floodplain forest. We found that ecosystem productivity is limited by soil moisture in two different ways. During the flooded period, the excess of water limits GPP (Spearman’s correlation; rho = −0.22), while during non-flooded months, GPP is positively associated with soil moisture (rho = 0.34). However, GPP is maximized when cumulative water deficit (CWD) increases (rho = 0.81), indicating that GPP is dependent on the amount of water available. EVI was positively associated with leaf litter mass (Pearson’s correlation; r = 0.55) and with GPP (r = 0.50), suggesting a coupling between new leaf production and the phenology of photosynthetic capacity, decreasing both at the peak of the flooded period and at the end of the dry season. EVI was able to describe the inter-annual variations on forest responses to environmental drivers, which have changed during an observed El Niño-Southern Oscillation (ENSO) year (2015/2016).
DOI Link: 10.3390/rs11131530
Rights: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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