Dynamic of boron in forest ecosystems traced by its isotopes: A modeling approach

Abstract

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The contribution of living organisms to rock weathering in the critical zone

“…The dependence of net primary production on rock weathering can be further complicated by element transfers, which do not involve mineral dissolution, such as atmospheric wet deposition or element exchanges with clay phases. Nevertheless, approaches combining model-dependent (e.g., closed system or steady-state hypothesis) proxies were developed to improve element mass balances involving vegetation and weathering rates at the soil profile or plot scale and discriminate the different elemental fluxes: the combination of stable and/or radiogenic isotope systems have helped to identify plant-mineral interactions and recycling by vegetation (Mg and Ca isotopes), uptake by vegetation (B), sources of mineral nutrients and ecosystem cycling of elements released by weathering (Sr), as well as weathering and erosion processes (U or Be) 12,[47][48][49][50] . Data generated by these methods, in combination with climate or vegetation gradients, was for instance used to try to disentangle the role of variables such as mean annual precipitation or net primary productivity in weathering rates 12 .…”

Impact of soil nitrogen availability and pH on tropical heath forest organic matter decomposition and decomposer activity

“…En el caso particular del P es liberado por la acción de las enzimas fosfatasas de los microorganismos, lo cual se discutirá en el capítulo 2 de esta tesis. Resultados comparables de incremento de nutrientes en el SSP multiestrato (P+a+A) fueron reportados por y otros(Chen et al, 2020;Chetelat, Gaillardet, y Chen 2021). SegúnGrandy et al (2013) el reciclaje de la vegetación que puede ocasionar una concentración relativamente alta de boro en la solución del suelo, tal como se encontró en el presente estudio.…”