Net primary productivity and litter decomposition rates in two distinct Amazonian peatlands
Jazyk angličtina Země Anglie, Velká Británie Médium print
Typ dokumentu časopisecké články
Grantová podpora
PRIMUS/23/SCI/013
Charles University
NE/R000751/1
Natural Environment Research Council
NE/R016860/1
Natural Environment Research Council
NE/V018760/1
Natural Environment Research Council
PubMed
39162201
DOI
10.1111/gcb.17436
Knihovny.cz E-zdroje
- Klíčová slova
- Mauritia flexuosa, Peru, carbon, decomposition, net primary productivity, palm swamp, peat, pole forest,
- MeSH
- lesy * MeSH
- listy rostlin metabolismus MeSH
- mokřady MeSH
- půda chemie MeSH
- tropické klima MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Peru MeSH
- Názvy látek
- půda MeSH
Measurements of net primary productivity (NPP) and litter decomposition from tropical peatlands are severely lacking, limiting our ability to parameterise and validate models of tropical peatland development and thereby make robust predictions of how these systems will respond to future environmental and climatic change. Here, we present total NPP (i.e., above- and below-ground) and decomposition data from two floristically and structurally distinct forested peatland sites within the Pastaza Marañón Foreland Basin, northern Peru, the largest tropical peatland area in Amazonia: (1) a palm (largely Mauritia flexuosa) dominated swamp forest and (2) a hardwood dominated swamp forest (known as 'pole forest', due to the abundance of thin-stemmed trees). Total NPP in the palm forest and hardwood-dominated forest (9.83 ± 1.43 and 7.34 ± 0.84 Mg C ha-1 year-1, respectively) was low compared with values reported for terra firme forest in the region (14.21-15.01 Mg C ha-1 year-1) and for tropical peatlands elsewhere (11.06 and 13.20 Mg C ha-1 year-1). Despite the similar total NPP of the two forest types, there were considerable differences in the distribution of NPP. Fine root NPP was seven times higher in the palm forest (4.56 ± 1.05 Mg C ha-1 year-1) than in the hardwood forest (0.61 ± 0.22 Mg C ha-1 year-1). Above-ground palm NPP, a frequently overlooked component, made large contributions to total NPP in the palm-dominated forest, accounting for 41% (14% in the hardwood-dominated forest). Conversely, Mauritia flexuosa litter decomposition rates were the same in both plots: highest for leaf material, followed by root and then stem material (21%, 77% and 86% of mass remaining after 1 year respectively for both plots). Our results suggest potential differences in these two peatland types' responses to climate and other environmental changes and will assist in future modelling studies of these systems.
Mediciones de la productividad primaria neta (PPN) y la descomposición de materia orgánica de las turberas tropicales son escasas, lo que limita nuestra capacidad para parametrizar y validar modelos de desarrollo de las turberas tropicales y, en consecuencia, realizar predicciones sólidas sobre la respuesta de estos sistemas ante futuros cambios ambientales y climáticos. En este estudio, presentamos datos de PPN total (es decir, biomasa aérea y subterránea) y descomposición de la materia orgánica colectada en dos turberas boscosas con características florísticas y estructurales contrastantes dentro de la cuenca Pastaza Marañón al norte del Perú, el área de turberas tropicales más grande de la Amazonia: (1) un bosque pantanoso dominado por palmeras (principalmente Mauritia flexuosa) y (2) un bosque pantanosos dominado por árboles leñosos de tallo delgado (conocido como ‘varillal hidromórfico’). La PPN total en el bosque de palmeras y el varillal hidromórfico (9,83 ± 1,43 y 7,34 ± 0,84 Mg C ha‐1 año‐1 respectivamente) fue baja en comparación con los valores reportados para los bosques de tierra firme en la región (14,21–15,01 Mg C ha‐1 año‐1) y para turberas tropicales en otros lugares (11,06 y 13,20 Mg C ha‐1 año‐1). A pesar de que la PPN total fue similar en ambos tipos de bosque, hubo diferencias considerables en la distribución de la PPN. La PPN de las raíces finas fue siete veces mayor en el bosque de palmeras (4,56 ± 1,05 Mg C ha‐1 año‐1) que en el varillal hidromórfico (0,61 ± 0,22 Mg C ha‐1 año‐1). La PPN de la biomasa aérea de las palmeras, un componente ignorado frecuentemente, contribuyó en gran medida a la PPN total del bosque de palmeras, representando el 41% (14% en el varillal hidromórfico). Por el contrario, la tasa de descomposición de materia orgánica de Mauritia flexuosa fue la misma en ambos sitios: la más alta corresponde a la hojarasca, seguida por las raíces y luego el tallo (21%, 77% y 86% de la masa restante después de un año, respectivamente para ambos sitios). Nuestros resultados sugieren diferencias potenciales en la respuesta de estos dos tipos de turberas al clima y otros cambios ambientales, y ayudarán en futuros estudios de modelamiento de estos sistemas.
Department of Geography University College London London UK
Departments of Botany Physical Geography and Geoecology Charles University Prague Czechia
Instituto de Investigaciones de la Amazonía Peruana Iquitos Peru
Royal Botanic Gardens Kew Richmond Surrey UK
School of Environmental Sciences University of Liverpool Liverpool UK
School of Geography and Sustainable Development University of St Andrews St Andrews UK
School of Geography University of Leeds Leeds UK
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